57 results on '"A. de Moreno de LeBlanc"'
Search Results
2. Oral administration of milk fermented by Lactobacillus casei CRL431 was able to decrease metastasis from breast cancer in a murine model by modulating immune response locally in the lungs
- Author
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Virginia Emilce Mendez Utz, Gabriela Perdigón, and Alejandra de Moreno de LeBlanc
- Subjects
Probiotic ,Lung metastasis ,Breast cancer ,Immune response ,Nutrition. Foods and food supply ,TX341-641 - Abstract
The host immune system is an important factor to combat metastasis. In this work, it was evaluated the immunomodulation exerted by milk fermented with the probiotic strain Lactobacillus casei CRL431 (PFM) when was administered to mice in the metastatic stage of breast cancer. Mice received PFM were compared to animals given milk. PFM administration diminished metastasis in the lungs and increased the survival of the animals. Systemically, PFM administration decreased pro-inflammatory cytokines and locally in the lungs (metastatic organs) decreased F4/80+ cells, principally IL-10/F4/80+ cells. The highest percentages for CD4+ and CD4+CD8+ cells were observed in PFM group. Finally, immune cells from lungs of mice given PFM showed lower production of most cytokines evaluated when they were re-stimulated in vitro with tumour cells. The results obtained suggest that modulation of immune cells in the lungs by PFM could be a strategy to fight against tumour cells in the metastatic sites.
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- 2019
- Full Text
- View/download PDF
3. Tropical fruit by-products water extracts as sources of soluble fibres and phenolic compounds with potential antioxidant, anti-inflammatory, and functional properties
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Marcela Albuquerque Cavalcanti de Albuquerque, Romina Levit, Carolina Beres, Raquel Bedani, Alejandra de Moreno de LeBlanc, Susana Marta Isay Saad, and Jean Guy LeBlanc
- Subjects
Probiotic ,Fruit by-products ,Dietary fibre ,Phenolic compounds ,Anti-inflammatory effect ,Folate ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Fibre content, phenolic content, antioxidant and anti-inflammatory activities were evaluated for water extracts of fruit by-products (passion fruit, orange, acerola, and mango). The impact of these extracts on microbial growth, folate production, and adhesion ability of Streptococcus thermophilus TH-4 and Lactobacillus rhamnosus LGG was investigated. Mango water extract (MWE) presented the highest phenolic content and antioxidant activity. Orange water extract (OWE) and MWE showed the best anti-inflammatory potential by decreasing the highest nitric oxide levels. When TH-4 and LGG were grown together, folate production was only stimulated by MWE. Passion fruit water extract and OWE increased the TH-4 adhesion whereas acerola water extracts and MWE improved LGG adhesion when strains were used individually. These results showed that fruit by-product water extracts (FWE), especially from mango, presented potential beneficial biological and functional properties. These FWE could be used to develop new functional antioxidant foods and natural pharmaceutical ingredients.
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- 2019
- Full Text
- View/download PDF
4. Evaluation of vitamin-producing and immunomodulatory lactic acid bacteria as a potential co-adjuvant for cancer therapy in a mouse model
- Author
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A. de Moreno de LeBlanc, Romina Levit, G. Savoy de Giori, and Jean Guy LeBlanc
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medicine.medical_treatment ,Riboflavin ,Applied Microbiology and Biotechnology ,law.invention ,chemistry.chemical_compound ,Probiotic ,Mice ,law ,Lactobacillales ,Intestinal Mucosa ,0303 health sciences ,Mice, Inbred BALB C ,biology ,PROBIOTIC ,IMMUNOMODULATION ,General Medicine ,Vitamins ,Lactic acid ,Cytokines ,Female ,Fluorouracil ,Adjuvant ,Biotechnology ,Vitamin ,Mucositis ,Cell Survival ,Cancer therapy ,Antineoplastic Agents ,Breast Neoplasms ,Microbiology ,Cell Line ,Immunomodulation ,03 medical and health sciences ,Folic Acid ,Adjuvants, Immunologic ,medicine ,INTESTINAL MUCOSITIS ,Animals ,Humans ,030304 developmental biology ,purl.org/becyt/ford/2.11 [https] ,030306 microbiology ,business.industry ,biology.organism_classification ,BREAST TUMOUR ,B vitamins ,Disease Models, Animal ,chemistry ,purl.org/becyt/ford/2 [https] ,Caco-2 Cells ,B VITAMINS ,business ,Bacteria - Abstract
Aims: To evaluate a mixture of selected lactic acid bacteria (LAB) (a riboflavin-producer, a folate-producer and an immunomodulatory strain) as co-adjuvant for 5-fluorouracil (5-FU) chemotherapy in cell culture and using a 4T1 cell animal model of breast cancer. Methods and results: The viability of Caco-2 cells exposed to 5-FU and/or LAB was analysed. Mice bearing breast tumour were treated with 5-FU and/or LAB. Tumour growth was measured. Intestinal mucositis (IM) was evaluated in small intestine; haematological parameters and plasma cytokines were determined. The bacterial mixture did not negatively affect the cytotoxic activity of 5-FU on Caco-2 cells. The LAB mixture attenuated the IM and prevented blood cell decreases associated with 5-FU treatment. Mice that received 5-FU and LAB mixture decreased tumour growth and showed modulation of systemic cytokines modified by both tumour growth and 5-FU treatment. The LAB mixture by itself delayed tumour growth. Conclusions: The mixture of selected LAB was able to reduce the side-effects associated with chemotherapy without affecting its primary anti-tumour activity. Significance and Impact of the Study: This bacterial mixture could prevent the interruption of conventional oncologic therapies by reducing undesirable side-effects. In addition, this blend would provide essential nutrients (vitamins) to oncology patients. Fil: Levit, Romina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Savoy, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
- Published
- 2021
5. Milk fermented by Lactobacillus casei CRL431 modifies cytokine profiles associated to different stages of breast cancer development in mice
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Gabriela Perdigón, A. de Moreno de LeBlanc, and V. E. Méndez Utz
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0301 basic medicine ,Microbiology (medical) ,Lactobacillus casei ,CIENCIAS MÉDICAS Y DE LA SALUD ,medicine.medical_treatment ,BREAST TUMOUR STAGES ,Inmunología ,Inflammation ,Microbiology ,Metastasis ,03 medical and health sciences ,0302 clinical medicine ,Breast cancer ,Immune system ,Medicine ,biology ,business.industry ,CYTOKINES ,PROBIOTIC ,Immunosuppression ,MOUSE MODEL ,medicine.disease ,biology.organism_classification ,Medicina Básica ,030104 developmental biology ,Cytokine ,030220 oncology & carcinogenesis ,Cancer cell ,Cancer research ,medicine.symptom ,business - Abstract
Breast cancer is one of the leading causes of death worldwide. It is recognised that immune system influences its promotion, progression, and metastasis, as well as their responsiveness to therapies. Previously, it was reported that milk fermented by Lactobacillus casei CRL431 decreased tumour growth and metastasis in a mouse breast cancer model, through the modulation of the host immune response. The aim of the present work was to analyse the systemic immune response induced by the administration of probiotic fermented milk (PFM) at different stages of cancer development, evaluating cytokines produced by splenocytes stimulated in vitro with 4T1 tumour cells, or its conditioned medium (CM). Groups of healthy mice and mice bearing 4T1 tumour or suffering metastasis after tumour surgery were studied. Results showed that at the early stages, PFM maintained pro-inflammatory response associated to the delay or the inhibition of tumour growth. PFM administration to mice bearing tumour maintained an important inflammatory response; however, in contrast to the milk group, this response was regulated to avoid exacerbation of inflammation. In the metastasis model, the benefits of PFM were associated to avoid the immunosuppression associated to high interleukin-10 levels. In conclusion, as cancer cells induce modifications of the immune response to favour their own growth at each stage of cancer development, PFM administration stimulated different profile of cytokines to respond to these modifications and fight against cancer cells. Fil: Méndez Utz, Virginia Emilce. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Perdigon, Gabriela del Valle. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
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- 2019
6. Characterization of folate production and probiotic potential of Streptococcus gallolyticus subsp. macedonicus CRL415
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Alejandra de Moreno de LeBlanc, Jonathan Emiliano Laiño, Jean Guy LeBlanc, Graciela Savoy de Giori, and Romina Levit
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Cultured Milk Products ,medicine.drug_class ,Antibiotics ,Microbial Sensitivity Tests ,FOL GENES EXPRESSION ,Microbiology ,Bacterial Adhesion ,law.invention ,Ciencias Biológicas ,03 medical and health sciences ,chemistry.chemical_compound ,Probiotic ,Folic Acid ,Starter ,Biología Celular, Microbiología ,LACTIC ACID BACTERIA ,law ,FOLATE PRODUCTION ,medicine ,Animals ,Bile ,Humans ,Streptococcus gallolyticus ,Food science ,Incubation ,STREPTOCOCCUS GALLOLYTICUS SUBSP. MACEDONICUS ,030304 developmental biology ,0303 health sciences ,Gastric Juice ,Microbial Viability ,biology ,030306 microbiology ,Probiotics ,PROBIOTIC PROPERTIES ,Temperature ,Streptococcus ,Gene Expression Regulation, Bacterial ,Hydrogen-Ion Concentration ,biology.organism_classification ,Anti-Bacterial Agents ,Lactic acid ,Glucose ,chemistry ,Fermentation ,Caco-2 Cells ,4-Aminobenzoic Acid ,CIENCIAS NATURALES Y EXACTAS ,Bacteria ,Food Science - Abstract
Mandatory fortification of foods with folic acid is being questioned by many scientists principally because of the potential adverse secondary effects associated with their excessive consumption. It has been shown that selected strains of lactic acid bacteria (LAB) are able to produce natural forms of folate and these could be included in foods to prevent deficiencies without causing adverse effects. The aim of this study was to evaluate folate production and fol gene expression by Streptococcus gallolyticus subsp. macedonicus (S. macedonicus) CRL415 under different growth conditions in vitro and to assess its potential probiotic application. Results showed that glucose as the principal carbon source, and incubation at 42 °C under controlled pH conditions (6.0) increased folate production, fol gene expression, and growth of S. macedonicus CRL415. This strain was able to produce elevated folate concentrations during milk fermentation without the need of prolonged incubation times and was able to resist conditions simulating the gastrointestinal tract. In addition, S. macedonicus was susceptible to all required antibiotics, and had a good adhesion level to intestinal cells in vitro, making it a promising candidate for biotechnological application as functional starter cultures in the dairy industry. Fil: Laiño, Jonathan Emiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Levit, Romina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Savoy, Graciela. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
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- 2019
7. Tropical fruit by-products water extracts as sources of soluble fibres and phenolic compounds with potential antioxidant, anti-inflammatory, and functional properties
- Author
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Raquel Bedani, Alejandra de Moreno de LeBlanc, Romina Levit, Jean Guy LeBlanc, Carolina Beres, Susana Marta Isay Saad, and Marcela Albuquerque Cavalcanti de Albuquerque
- Subjects
0301 basic medicine ,Folate ,Streptococcus thermophilus ,Antioxidant ,medicine.drug_class ,medicine.medical_treatment ,Medicine (miscellaneous) ,Orange (colour) ,Bacterial growth ,Probiotic ,Tropical fruit ,Anti-inflammatory ,law.invention ,03 medical and health sciences ,0404 agricultural biotechnology ,Lactobacillus rhamnosus ,law ,medicine ,TX341-641 ,Fruit by-products ,Food science ,030109 nutrition & dietetics ,Nutrition and Dietetics ,biology ,Nutrition. Foods and food supply ,Chemistry ,Anti-inflammatory effect ,Dietary fibre ,food and beverages ,04 agricultural and veterinary sciences ,biology.organism_classification ,040401 food science ,Phenolic compounds ,COMPOSTOS FENÓLICOS ,Food Science - Abstract
Fibre content, phenolic content, antioxidant and anti-inflammatory activities were evaluated for water extracts of fruit by-products (passion fruit, orange, acerola, and mango). The impact of these extracts on microbial growth, folate production, and adhesion ability of Streptococcus thermophilus TH-4 and Lactobacillus rhamnosus LGG was investigated. Mango water extract (MWE) presented the highest phenolic content and antioxidant activity. Orange water extract (OWE) and MWE showed the best anti-inflammatory potential by decreasing the highest nitric oxide levels. When TH-4 and LGG were grown together, folate production was only stimulated by MWE. Passion fruit water extract and OWE increased the TH-4 adhesion whereas acerola water extracts and MWE improved LGG adhesion when strains were used individually. These results showed that fruit by-product water extracts (FWE), especially from mango, presented potential beneficial biological and functional properties. These FWE could be used to develop new functional antioxidant foods and natural pharmaceutical ingredients.
- Published
- 2019
8. Neuroprotective effects associated with immune modulation by selected lactic acid bacteria in a Parkinson's disease model
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Jean Guy LeBlanc, Alejandra de Moreno de LeBlanc, Daiana E. Pérez Visñuk, and Graciela Savoy de Giori
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0301 basic medicine ,Parkinson's disease ,Endocrinology, Diabetes and Metabolism ,030209 endocrinology & metabolism ,Inflammation ,ANIMAL MODEL ,Neuroprotection ,law.invention ,Microbiology ,Mice ,03 medical and health sciences ,Probiotic ,chemistry.chemical_compound ,0302 clinical medicine ,Animal model ,INFLAMMATION ,Lactobacillales ,law ,LACTIC ACID BACTERIA ,medicine ,Animals ,Streptococcus thermophilus ,MOTOR BEHAVIOR ,purl.org/becyt/ford/3.4 [https] ,030109 nutrition & dietetics ,Nutrition and Dietetics ,biology ,Probiotics ,PROBIOTIC ,Parkinson Disease ,Immune modulation ,medicine.disease ,biology.organism_classification ,Lactic acid ,Neuroprotective Agents ,chemistry ,purl.org/becyt/ford/3 [https] ,medicine.symptom ,PARKINSON'S DISEASE ,Bacteria - Abstract
Objectives: Parkinson's disease (PD) is a neurodegenerative process that affects the motor function and involves an inflammatory response and B vitamin deficiencies. The aim of this study was to evaluate the effect of B-group vitamin-producing and immunomodulatory lactic acid bacteria (LAB) in a murine model of PD. Methods: The effect of Lactobacillus plantarum CRL 2130 (a riboflavin producer), Streptococcus thermophilus CRL 807 (an immunomodulatory strain), and Streptococcus thermophilus CRL 808 (a folate producer) were evaluated individually and as a mixture in mice injected with 1-methyl-4-fenil-1,2,3,6-tetrahidropiridina. Motor capacity, tyrosine hydrolase in the brain, and cytokine concentrations in serum and brain tissues were evaluated in 1-methyl-4-fenil-1,2,3,6-tetrahidropiridina-treated mice after bacterial supplementation. Results: The mice receiving the selected LAB showed significantly improved motor skills compared with those that did not receive bacterial supplementation. When given the mixture of all 3 strains together, the animals had higher brain tyrosine hydrolase-positive cell counts, decreased inflammatory cytokines interleukin 6 and tumor necrosis factor alpha in serum, and increased antiinflammatory cytokine interleukin 10 in serum and brain tissues compared with animals that did not receive LAB supplementation. Conclusions: The results showed the potential of a selected LAB mixture to improve motor behavior and neuroinflammation in PD. This probiotic mixture could be used as an adjunct treatment in the control of PD. Fil: Pérez Visñuk, Daiana Emilce. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Savoy, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
- Published
- 2020
9. Protective effect of the riboflavin-overproducing strain Lactobacillus plantarum CRL2130 on intestinal mucositis in mice
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Alejandra de Moreno de LeBlanc, Graciela Savoy de Giori, Jean Guy LeBlanc, and Romina Levit
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Mucositis ,0301 basic medicine ,Otras Ingenierías y Tecnologías ,Riboflavin ,Endocrinology, Diabetes and Metabolism ,Cell Culture Techniques ,Antineoplastic Agents ,INGENIERÍAS Y TECNOLOGÍAS ,Protective Agents ,RIBOFLAVIN ,law.invention ,Microbiology ,Alimentos y Bebidas ,Mice ,03 medical and health sciences ,Probiotic ,LACTIC ACID BACTERIA ,law ,medicine ,Animals ,Humans ,Intestinal Mucosa ,Mice, Inbred BALB C ,Nutrition and Dietetics ,biology ,Strain (chemistry) ,Probiotics ,food and beverages ,medicine.disease ,biology.organism_classification ,FLUOROURACIL ,Disease Models, Animal ,030104 developmental biology ,5-FLUOROURACIL ,Female ,Fluorouracil ,MUCOSITIS ,Caco-2 Cells ,Lactobacillus plantarum - Abstract
Objective: Intestinal mucositis (IM), a side effect commonly associated to cancer treatments, is a local inflammatory response that causes alterations of the intestinal structure that in turn affects nutrient absorption. Lactobacillus (L.) plantarum CRL 2130 is a riboflavin-overproducing strain that has previously been shown to provide anti-inflammatory properties. The objective of this study was to evaluate the effects of this riboflavin producing strain in a chemically induced murine mucositis model. Research Methods & Procedures: Mucositis was induced by daily injections of 5-fluororacil (5-FU) after which mice were either given L. plantarum CRL 2130, L. plantarum CRL 725 (the strain from which CRL 2130 was derived that does not overproduce riboflavin), or commercial riboflavin twice daily during the 6 days of chemotherapy agent injections. The effect of the strains and riboflavin was also evaluated in vitro using Caco-2 intestinal cancer cell cultures to determine if they interfere with 5-FU´s anti-cancer activity. Results: Administration of L. plantarum CRL 2130 significantly attenuated the pathological changes induced by 5-FU in mice such as body weight loss, diarrhea, the shortening of villus height, increases in proinflammatory cytokine concentrations, and induced an elevated production of IL-10. In vitro assays using Caco-2 cells showed that the effectiveness of 5-FU was not affected by L. plantarum CRL 2130 and that this strain exerted an inhibitory mechanism against oxidative stress. Conclusion: These results indicate that the riboflavin-overproducing strain L. plantarum CRL 2130 could be useful to prevent mucositis during cancer treatments and would not affect the primary treatment. Fil: Levit, Romina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Savoy, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
- Published
- 2018
10. Folate-producing lactic acid bacteria reduce inflammation in mice with induced intestinal mucositis
- Author
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G. Savoy de Giori, A. de Moreno de LeBlanc, Jean Guy LeBlanc, and Romina Levit
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0301 basic medicine ,medicine.medical_treatment ,Ciencias de la Salud ,medicine.disease_cause ,Applied Microbiology and Biotechnology ,law.invention ,Mice ,Probiotic ,0302 clinical medicine ,LACTIC ACID BACTERIA ,Lactobacillales ,law ,Streptococcus thermophilus ,Intestinal Mucosa ,Streptococcus ,PROBIOTIC ,food and beverages ,General Medicine ,CHEMOTHERAPY ,Otras Ciencias de la Salud ,Intestines ,Cytokine ,030220 oncology & carcinogenesis ,5-FLUOROURACIL ,Cytokines ,Fluorouracil ,medicine.symptom ,Biotechnology ,Diarrhea ,Mucositis ,CIENCIAS MÉDICAS Y DE LA SALUD ,Inflammation ,Microbiology ,03 medical and health sciences ,Folic Acid ,Immune system ,INFLAMMATION ,In vivo ,medicine ,Animals ,Humans ,Chemotherapy ,business.industry ,Probiotics ,medicine.disease ,030104 developmental biology ,MUCOSITIS ,Caco-2 Cells ,business ,FOLATE - Abstract
Aim: To evaluate two folate-producing strains, Streptococcus (Strep.) thermophilus CRL 808 and Strep. thermophilus CRL 415, against chemically induced mucositis in mice. Methods and Results: In vitro assays with Caco-2 cells were performed to evaluate the effect of the bacteria in the presence of 5-fluorouracil (5-FU). For in vivo studies, mice were daily injected with 5-FU to induce intestinal mucositis (IM) and orally administered with folate-producing strains during 6 days. Clinical symptoms, histological parameters and cytokine profiles were assessed. The results showed that Strep. thermophilus CRL 808 increased the cytotoxicity of 5-FU against Caco-2 cells. Administration of this strain in mice with chemically induced IM resulted in a reduction in diarrhoea score and restoration of the intestinal architecture. Cytokine analysis showed that the anti-inflammatory effect by the bacterium is not associated with an immune mechanism. Regarding Strep. thermophilus CRL 415, no improvements were observed in any of the parameters evaluated. Conclusion: The administration of the folate-producing Strep. thermophilus CRL 808 has the potential to prevent IM induced by 5-FU in mice. Significance and Impact of the Study: Folate-producing LAB could be used in chemotherapy patients to reduce the symptoms of IM, improve their nutritional status and increase the effectiveness of 5-FU. Fil: Levit, Romina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Savoy, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
- Published
- 2018
11. Effect of riboflavin-producing bacteria against chemically induced colitis in mice
- Author
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Jean Guy LeBlanc, G. Savoy de Giori, Romina Levit, and A. de Moreno de LeBlanc
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0301 basic medicine ,Vitamin ,Streptococcus thermophilus ,Otras Ciencias Biológicas ,Riboflavin ,Probiotic ,Applied Microbiology and Biotechnology ,law.invention ,Microbiology ,Proinflammatory cytokine ,Ciencias Biológicas ,purl.org/becyt/ford/1 [https] ,Feces ,Mice ,Lactic Acid Bacteria ,03 medical and health sciences ,chemistry.chemical_compound ,law ,Lactobacillus ,medicine ,Animals ,Humans ,Colitis ,purl.org/becyt/ford/1.6 [https] ,Mice, Inbred BALB C ,biology ,Probiotics ,food and beverages ,General Medicine ,biology.organism_classification ,medicine.disease ,Interleukin-10 ,Lactic acid ,Intestines ,030104 developmental biology ,Trinitrobenzenesulfonic Acid ,chemistry ,Female ,CIENCIAS NATURALES Y EXACTAS ,Anti-Inflammatory Effect ,Biotechnology - Abstract
Aim: To assess the anti-inflammatory effect associated with individual probiotic suspensions of riboflavin-producing lactic acid bacteria (LAB) in a colitis murine model. Methods and Results: Mice intrarectally inoculated with trinitrobenzene sulfonic acid (TNBS) were orally administered with individual suspensions of riboflavin-producing strains: Lactobacillus (Lact.) plantarum CRL2130, Lact. paracasei CRL76, Lact. bulgaricus CRL871 and Streptococcus thermophilus CRL803; and a nonriboflavin-producing strain or commercial riboflavin. The extent of colonic damage and inflammation and microbial translocation to liver were evaluated. iNOs enzyme was analysed in the intestinal tissues and cytokine concentrations in the intestinal fluids. Animals given either one of the four riboflavin-producing strains showed lower macroscopic and histologic damage scores, lower microbial translocation to liver, significant decreases of iNOs+ cells in their large intestines and decreased proinflammatory cytokines, compared with mice without treatment. The administration of pure riboflavin showed similar benefits. Lact. paracasei CRL76 accompanied its anti-inflammatory effect with increased IL-10 levels demonstrating other beneficial properties in addition to the vitamin production. Conclusion: Administration of riboflavin-producing strains prevented the intestinal damage induced by TNBS in mice. Significance and Impact of the Study: Riboflavin-producing phenotype in LAB represents a potent tool to select them for preventing/treating IBD. Fil: Levit, Romina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Centro de Referencia Para Lactobacilos; Argentina Fil: Savoy, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Centro de Referencia Para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Centro de Referencia Para Lactobacilos; Argentina Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Centro de Referencia Para Lactobacilos; Argentina
- Published
- 2017
12. Oral administration of milk fermented by Lactobacillus casei CRL431 was able to decrease metastasis from breast cancer in a murine model by modulating immune response locally in the lungs
- Author
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Alejandra de Moreno de LeBlanc, Virginia Emilce Mendez Utz, and Gabriela Perdigón
- Subjects
0301 basic medicine ,Lactobacillus casei ,Otras Ciencias Biológicas ,Medicine (miscellaneous) ,Probiotic ,law.invention ,Metastasis ,Ciencias Biológicas ,purl.org/becyt/ford/1 [https] ,03 medical and health sciences ,0404 agricultural biotechnology ,Breast cancer ,Immune system ,Oral administration ,law ,BREAST CANCER ,IMMUNE RESPONSE ,medicine ,TX341-641 ,Immune response ,purl.org/becyt/ford/1.6 [https] ,030109 nutrition & dietetics ,Nutrition and Dietetics ,biology ,business.industry ,Nutrition. Foods and food supply ,PROBIOTIC ,04 agricultural and veterinary sciences ,medicine.disease ,biology.organism_classification ,040401 food science ,In vitro ,Lung metastasis ,Cancer research ,LUNG METASTASIS ,business ,CIENCIAS NATURALES Y EXACTAS ,CD8 ,Food Science - Abstract
The host immune system is an important factor to combat metastasis. In this work, it was evaluated the immunomodulation exerted by milk fermented with the probiotic strain Lactobacillus casei CRL431 (PFM) when was administered to mice in the metastatic stage of breast cancer. Mice received PFM were compared to animals given milk. PFM administration diminished metastasis in the lungs and increased the survival of the animals. Systemically, PFM administration decreased pro-inflammatory cytokines and locally in the lungs (metastatic organs) decreased F4/80+ cells, principally IL-10/F4/80+ cells. The highest percentages for CD4+ and CD4+CD8+ cells were observed in PFM group. Finally, immune cells from lungs of mice given PFM showed lower production of most cytokines evaluated when they were re-stimulated in vitro with tumour cells. The results obtained suggest that modulation of immune cells in the lungs by PFM could be a strategy to fight against tumour cells in the metastatic sites. Fil: Méndez Utz, Virginia Emilce. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Perdigon, Gabriela del Valle. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Microbiología. Cátedra de Inmunología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
- Published
- 2019
13. Development of a potential probiotic yoghurt using selected anti-inflammatory lactic acid bacteria for prevention of colitis and carcinogenesis in mice
- Author
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Jean Guy LeBlanc, A. de Moreno de LeBlanc, and S. del Carmen
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Carcinogenesis ,Colorectal cancer ,medicine.disease_cause ,Applied Microbiology and Biotechnology ,law.invention ,Mice ,STREPTOCOCCUS THERMOPHILUS ,Probiotic ,chemistry.chemical_compound ,0302 clinical medicine ,LACTIC ACID BACTERIA ,law ,Mice, Inbred BALB C ,CARCINOGENESIS ,food and beverages ,General Medicine ,Colitis ,Yogurt ,Lactic acid ,Intestines ,Lactobacillaceae ,030220 oncology & carcinogenesis ,Colonic Neoplasms ,Female ,030211 gastroenterology & hepatology ,medicine.symptom ,COLITIS ,Biotechnology ,CIENCIAS MÉDICAS Y DE LA SALUD ,medicine.drug_class ,Inflammation ,Biology ,Anti-inflammatory ,Biotecnología de la Salud ,Microbiology ,03 medical and health sciences ,Immune system ,medicine ,Animals ,Humans ,Lactic Acid ,Probiotics ,LACTOBACILLUS BULGARICUS ,medicine.disease ,chemistry ,Fermentation ,Immunology ,Otras Biotecnologías de la Salud - Abstract
Aims: To evaluate the beneficial properties of a potentially probiotic yoghurt obtained by the fermentation of two selected anti-inflammatory bacterial strains using in vivo mouse models of intestinal inflammation and colon carcinogenesis. Methods and Results: Yoghurt was administered to mice suffering chemically induced intestinal inflammation or colon carcinogenesis. It was shown that this novel yoghurt was able to prevent local inflammation in the intestines of mice through a regulation of the immune response, prevent macroscopic and histological damages, and prevent colon carcinogenesis through an anti-inflammatory response. Conclusions: The developed yoghurt showed in vivo anti-inflammatory properties by modulation of the host immune response for the prevention of colon inflammation and carcinogenesis. Significance and Impact of the Study: This new yoghurt could thus be considered a probiotic food and be useful as a complement to current treatment protocols for inflammatory bowel diseases and colon cancer, a first since there are no current functional foods specifically oriented for these patients. Fil: del Carmen, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Centro de Referencia Para Lactobacilos; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Centro de Referencia Para Lactobacilos; Argentina Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Centro de Referencia Para Lactobacilos; Argentina
- Published
- 2016
14. RETRACTED ARTICLE: Lactobacillus casei BL23 regulates Treg and Th17 T-cell populations and reduces DMH-associated colorectal cancer
- Author
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Naima G. Cortes-Perez, Philippe Langella, Jean Guy LeBlanc, Luis G. Bermúdez-Humarán, Diego Muñoz-Provencio, Silvina del Carmen, Alejandra de Moreno de LeBlanc, Marion Lenoir, Florian Chain, and Daniel Lozano-Ojalvo
- Subjects
0301 basic medicine ,medicine.medical_specialty ,Lactobacillus casei ,Colorectal cancer ,T cell ,law.invention ,03 medical and health sciences ,Probiotic ,0302 clinical medicine ,Surgical oncology ,Intestinal inflammation ,law ,Internal medicine ,medicine ,Beneficial effects ,biology ,Gastroenterology ,food and beverages ,Hepatology ,medicine.disease ,biology.organism_classification ,digestive system diseases ,3. Good health ,030104 developmental biology ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Immunology - Abstract
Background Chronic intestinal inflammation alters host physiology and could lead to colorectal cancer (CRC). We have previously reported beneficial effects of the probiotic strain of Lactobacillus casei BL23 in different murine models of intestinal inflammation. In addition, there is an emerging interest on the potential beneficial effects of probiotics to treat CRC. We thus explored whether L. casei BL23 displays protective effects on CRC.
- Published
- 2016
15. Evaluation of vitamin‐producing and immunomodulatory lactic acid bacteria as a potential co‐adjuvant for cancer therapy in a mouse model.
- Author
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Levit, R., Savoy de Giori, G., de Moreno de LeBlanc, A., and LeBlanc, J.G.
- Subjects
LACTIC acid bacteria ,VITAMIN B2 ,CANCER treatment ,ESSENTIAL nutrients ,SMALL intestine ,CELL culture - Abstract
Aims: To evaluate a mixture of selected lactic acid bacteria (LAB) (a riboflavin‐producer, a folate‐producer and an immunomodulatory strain) as co‐adjuvant for 5‐fluorouracil (5‐FU) chemotherapy in cell culture and using a 4T1 cell animal model of breast cancer. Methods and results: The viability of Caco‐2 cells exposed to 5‐FU and/or LAB was analysed. Mice bearing breast tumour were treated with 5‐FU and/or LAB. Tumour growth was measured. Intestinal mucositis (IM) was evaluated in small intestine; haematological parameters and plasma cytokines were determined. The bacterial mixture did not negatively affect the cytotoxic activity of 5‐FU on Caco‐2 cells. The LAB mixture attenuated the IM and prevented blood cell decreases associated with 5‐FU treatment. Mice that received 5‐FU and LAB mixture decreased tumour growth and showed modulation of systemic cytokines modified by both tumour growth and 5‐FU treatment. The LAB mixture by itself delayed tumour growth. Conclusions: The mixture of selected LAB was able to reduce the side‐effects associated with chemotherapy without affecting its primary anti‐tumour activity. Significance and Impact of the Study: This bacterial mixture could prevent the interruption of conventional oncologic therapies by reducing undesirable side‐effects. In addition, this blend would provide essential nutrients (vitamins) to oncology patients. [ABSTRACT FROM AUTHOR]
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- 2021
- Full Text
- View/download PDF
16. Vitamin Producing Lactic Acid Bacteria as Complementary Treatments for Intestinal Inflammation
- Author
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Romina Levit, Jean Guy LeBlanc, Alejandra de Moreno de LeBlanc, and Graciela Savoy de Giori
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0301 basic medicine ,Vitamin ,Complementary Therapies ,INTESTINAL INFLAMMATION ,Otras Ciencias Biológicas ,Immunology ,Inflammation ,Riboflavin ,Pharmacology ,Inflammatory bowel disease ,RIBOFLAVIN ,law.invention ,Ciencias Biológicas ,03 medical and health sciences ,chemistry.chemical_compound ,Probiotic ,VITAMIN ,law ,LACTIC ACID BACTERIA ,Lactobacillales ,medicine ,Immunology and Allergy ,Animals ,Humans ,Colitis ,biology ,business.industry ,Probiotics ,PROBIOTIC ,General Medicine ,Vitamins ,medicine.disease ,biology.organism_classification ,Inflammatory Bowel Diseases ,Lactic acid ,030104 developmental biology ,chemistry ,MUCOSITIS ,medicine.symptom ,business ,Bacteria ,CIENCIAS NATURALES Y EXACTAS ,FOLATE ,COLITIS - Abstract
Background: Current therapies for against inflammatory bowel disease (IBD) are sometimes limited by high costs, high toxicities and/or undesirable side effects, reasons for which new treatments are constantly being developed and studied. In this regards an increasing mass of data has demonstrated that fecal transplantations and probiotic supplementations have shown promising effects and could be considered as adjunct IBD treatments to decrease some of the unwanted side effects caused by primary treatments. Furthermore, there is also mounting evidence that suggests that certain vitamins could provide anti-inflammatory effects and it has been shown that certain strains of lactic acid bacteria (LAB), the most commonly used probiotic microorganisms, can produce biologically active forms of certain vitamins. Objective: To discuss the potential role of vitamin-producing LAB on intestinal inflammatory diseases. Method: A thorough search of bibliographic databases for peer-reviewed research on the effect of vitamins produced by LAB on inflammatory processes was performed. Results: There is mounting research that vitamin producing LAB could provide anti-inflammatory effects. Conclusion: The potential role of vitamin producing LAB was discussed not only because they could be used to decrease inflammation but also because they could provide the host with essential nutrients that are normally deficient in IBD patients due to altered intestinal morphologies. Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Levit, Romina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Savoy, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
- Published
- 2018
17. Functional Food Biotechnology
- Author
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Anderson Miyoshi, Jean Guy LeBlanc, Tessalia Diniz Luerce, Alejandra de Moreno de LeBlanc, and Vasco Azevedo
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0301 basic medicine ,business.industry ,Genetically engineered ,Microorganism ,030106 microbiology ,food and beverages ,Biology ,Health benefits ,biology.organism_classification ,Lactic acid ,Biotechnology ,law.invention ,03 medical and health sciences ,chemistry.chemical_compound ,Probiotic ,030104 developmental biology ,Nutraceutical ,chemistry ,Functional food ,law ,business ,Bacteria - Abstract
The fact that certain foods can exert beneficial effects beyond their intrinsic nutritional values has led to the development of functional foods. The increase in nutraceutical content to obtain functional foods through the use of lactic acid bacteria (LAB) can be done by the appropriate selection of strains. However, genetic engineering of LAB allows the creation of microorganisms that are more efficient in producing nutraceuticals in sufficient quantities to exert biological effects. Another mechanism by which LAB can be used to produce functional foods is their use as probiotic microorganisms, when live than administered in adequate amounts can confer a health benefit on the host. In this chapter, the use of native and genetically engineered LAB as nutraceutical factories or probiotic microorganisms to obtain functional foods will be discussed.
- Published
- 2018
18. Role of Probiotics and Functional Foods in Health: Gut Immune Stimulation by Two Probiotic Strains and a Potential Probiotic Yoghurt
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Ivanna Novotny Núñez, Alejandra de Moreno de LeBlanc, Gabriela Perdigón, Esteban Carmuega, and Carolina Maldonado Galdeano
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Lactobacillus casei ,Lactobacillus paracasei ,Health Status ,Otras Ciencias Biológicas ,Endocrinology, Diabetes and Metabolism ,law.invention ,Microbiology ,Ciencias Biológicas ,Probiotic ,Immune system ,Functional food ,Functional Food ,law ,Intestinal inflammation ,SYSTEMIC IMMUNITY ,Animals ,Humans ,Immunology and Allergy ,Food science ,Immune Stimulation ,biology ,Probiotics ,PROBIOTIC ,Gastrointestinal Microbiome ,food and beverages ,PROBIOTIC FERMENTED MILK ,Yogurt ,biology.organism_classification ,PROBIOTIC CLAIMS ,Gastric Mucosa ,MUCOSAL IMMUNITY ,CIENCIAS NATURALES Y EXACTAS - Abstract
There are numerous reports that show the benefits on the health attributed to the probiotic consumptions. Most of the studies were performed using animal models and only some of them were validated in controlled human trials. The present review is divided in two sections. In the first section we describe how the probiotic microorganisms can interact with the intestinal epithelial cells that are the first line of cell in the mucosal site, focusing in the studies of two probiotic strains: Lactobacillus casei DN-114001 (actually Lactobacillus paracasei CNCMI-1518) and Lactobacillus casei CRL 431. Then we describe same beneficial effects attributed to probiotic administration and the administration of fermented milks containing these microorganisms or potential probiotic yoghurt, principally on the immune system and on the intestinal barrier in different experimental mouse models like enteropathogenic infection, malnutrition, cancer and intestinal inflammation. Fil: Maldonado Galdeano, María Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Microbiología. Cátedra de Inmunología; Argentina Fil: Novotny Núñez, Ivanna. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Carmuega, Esteban. Centro de Estudios Nutrición Infantil; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Perdigon, Gabriela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Microbiología. Cátedra de Inmunología; Argentina
- Published
- 2015
19. Evaluation of immune response, microbiota, and blood markers after probiotic bacteria administration in obese mice induced by a high-fat diet
- Author
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Ivanna Novotny Núñez, Gabriela Perdigón, Carolina Maldonado Galdeano, and Alejandra de Moreno de LeBlanc
- Subjects
Endocrinology, Diabetes and Metabolism ,Mice, Obese ,Gut flora ,law.invention ,Probiotic ,fluids and secretions ,law ,GUT IMMUNITY ,Intestine, Small ,Bacteroides ,Intestinal Mucosa ,Mice, Inbred BALB C ,Nutrition and Dietetics ,biology ,Microbiota ,GUT MICROBIOTA ,PROBIOTIC ,food and beverages ,FERMENTED MILK ,Acquired immune system ,Lacticaseibacillus casei ,medicine.anatomical_structure ,Liver ,OBESITY ,Female ,Antibody ,CIENCIAS NATURALES Y EXACTAS ,Lactobacillus casei ,Otras Ciencias Biológicas ,Spleen ,Diet, High-Fat ,digestive system ,Ciencias Biológicas ,Immune system ,Phagocytosis ,Immunity ,Weight Loss ,medicine ,Animals ,Obesity ,Immunity, Mucosal ,Macrophages ,Probiotics ,HUMORAL IMMUNE RESPONSE ,biology.organism_classification ,Dietary Fats ,Immunoglobulin A ,Immunology ,biology.protein ,Bifidobacterium ,Biomarkers - Abstract
Objective: Obesity is associated with alterations in intestinal microbiota and immunity. The aim of this study was to determine the effect of probiotic Lactobacillus casei CRL 431 administration on intestinal and humoral immune response, clinical parameters, and gut microbiota was evaluated using a high-fat diet to induce obesity in a mouse model. Methods: Adult mice received a conventional balanced diet or a high-fat diet supplemented with milk, milk fermented by Lactobacillus casei (FM), L. casei as suspension, or water over 60d. Histology of liver and small intestine (SI), immunoglobulin A-positive cells and macrophages in SI, phagocytic activity of spleen and peritoneal macrophages, and humoral immune response to ovalbumin were studied. Clinical parameters in serum and gut microbiota were also analyzed. Results: FM was the most effective supplement for decreasing body weight and clinical parameters in serum. The histology of liver and SI was also improved in obese mice given FM. These animals had increased numbers of immunoglobulin A-positive cells and macrophages in SI. The gut microbiota showed that obese mice given probiotics had increased Bacteroides and bifidobacteria. Administration of FM or L. casei as suspension enhanced the phagocytic activity of macrophages. The anti-ovalbumin specific immune response was not increased by any supplement assayed. Conclusion: Administration of probiotics to obese hosts improved the gut microbiota and the mucosal immunity altered by obesity, down-regulated some biochemical parameters in blood associated with metabolic syndrome, and decreased liver steatosis. These results demonstrate the potential use of probiotics in obese individuals to decrease the body weight and to improve the biochemical and immunologic parameters altered by obesity. Fil: Novotny Núñez, Ivanna. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Maldonado Galdeano, María Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Microbiología; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Perdigon, Gabriela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Microbiología; Argentina
- Published
- 2014
20. The administration of milk fermented by the probiotic Lactobacillus casei CRL 431 exerts an immunomodulatory effect against a breast tumour in a mouse model
- Author
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Felix Aragón, Alejandra de Moreno de LeBlanc, Silvia Carino, and Gabriela Perdigón
- Subjects
Lactobacillus casei ,Angiogenesis ,CD8 Antigens ,Immunology ,Mammary Neoplasms, Animal ,Pharmacology ,ANGIOGENESIS ,law.invention ,Microbiology ,Ciencias Biológicas ,Mice ,Probiotic ,Mammary Glands, Animal ,Breast cancer ,Immune system ,BREAST CANCER ,law ,IMMUNE RESPONSE ,medicine ,Animals ,Humans ,Immunology and Allergy ,Mammary Glands, Human ,Cell Proliferation ,Mice, Inbred BALB C ,biology ,Interleukin-6 ,Probiotics ,PROBIOTIC ,food and beverages ,MOUSE MODEL ,Hematology ,Small tumours ,Bioquímica y Biología Molecular ,biology.organism_classification ,medicine.disease ,Antigens, Differentiation ,Immunoglobulin A ,Interleukin-10 ,Disease Models, Animal ,Lacticaseibacillus casei ,Milk ,CD4 Antigens ,Fermentation ,Female ,CIENCIAS NATURALES Y EXACTAS ,CD8 - Abstract
Antitumour activity is one of the health-promoting effects attributed to probiotics specially analysed from preclinical models, mostly murine. Here, the effect of milk fermented by the probiotic bacterium Lactobacillus casei CRL 431, on a murine breast cancer model was analysed. Mice were fed with milk fermented by Lactobacillus casei or unfermented milk before and after tumour injection. Rate of tumour development, cytokines in serum, IgA, CD4, CD8, F4/80 and cytokines positive cells in mammary glands were determined. Microvasculature in the tumour tissues was monitored. The effect of fermented milk administration after tumour injection was also evaluated. It was observed that probiotic administration delayed or blocked tumour development. This effect was associated to modulation of the immune response triggered by the tumour. The area occupied by blood vessels decreased in the tumours from mice given fermented milk which agrees with their small tumours, and fewer side effects. Finally, it was observed that probiotic administration after tumour detection was also beneficial to delay the tumour growth. In conclusion, we showed in this study the potential of milk fermented by the probiotic Lactobacillus casei CRL431 to stimulate the immune response against this breast tumour, avoiding or delaying its growth when it was preventively administrated and also when the administration started after tumour cells injection Fil: Aragón, Félix Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Carino, Silvia. Universidad Nacional de Tucumán. Facultad de Odontología; Argentina Fil: Perdigon, Gabriela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
- Published
- 2014
21. Effect of a probiotic fermented milk on the thymus in Balb/c mice under non-severe protein–energy malnutrition
- Author
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Ivanna Novotny Núñez, Alejandra de Moreno de LeBlanc, Carolina Maldonado Galdeano, Ricardo Weill, Gabriela Perdigón, and Esteban Carmuega
- Subjects
Male ,CIENCIAS MÉDICAS Y DE LA SALUD ,Protein–energy malnutrition ,Ciencias de la Salud ,Medicine (miscellaneous) ,Physiology ,Apoptosis ,Thymus Gland ,Kangai-1 Protein ,Protein-Energy Malnutrition ,Severity of Illness Index ,BALB/c ,law.invention ,Mice ,Probiotic ,Immune system ,law ,Animals ,Medicine ,THYMUS ,Mice, Inbred BALB C ,Thymocytes ,Nutrition and Dietetics ,biology ,business.industry ,Probiotics ,Histology ,NON-SEVERE-PROTEIN ENERGY MALNUTRITION ,MOUSE MODEL ,FERMENTED MILK ,biology.organism_classification ,medicine.disease ,PROBIOTICS ,Otras Ciencias de la Salud ,Malnutrition ,Milk ,CD4 Antigens ,Dietary Supplements ,Fermentation ,Immunology ,Food Microbiology ,Cytokines ,Female ,business - Abstract
Protein–energy malnutrition (PEM) causes a significant impairment of the immune system, the thymus being one of the most affected organs. It has been demonstrated that the administration of probiotic fermented milk (PFM) recovered the intestinal barrier, histological alterations and mucosal and systemic immune functions in a non-severe malnutrition model using BALB/c mice. The aim of the present study was to evaluate, in the same model of malnutrition, the effect of a PFM added to a re-nutrition diet on the recovery of the thymus, analysing histological and functional alterations caused by malnutrition. Mice were undernourished and divided into three groups according to the dietary supplement received during re-nutrition: milk, PFM or its bacterial-free supernatant (BFS). They were compared with well-nourished and malnourished mice. PFM was the most effective re-nutrition supplement to improve the histology of the thymus, decreasing cellular apoptosis in this organ and recovering the percentage of CD4þ/CD82 single-positive thymocytes. Immature doublepositive thymocytes were increased in the malnourished control (MC). The production of different cytokines in the thymus was increased in mice given PFM, compared with the mice that received other dietary supplements and MC. Mice given the BFS presented an improvement in the thymus similar to those that received milk. We demonstrated the importance of the whole PFM supplementation on the histological and functional recovery of the thymus in a non-severe PEM model. Fil: Novotny Núñez, Ivanna. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Centro de Referencia para Lactobacilos (i); Argentina; Fil: Maldonado Galdeano, María Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Centro de Referencia para Lactobacilos (i); Argentina; Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Microbiología; Argentina; Fil: Carmuega, Esteban. Centro de Estudios en Nutrición Infantil; Argentina; Fil: Weill, Ricardo. DANONE. Departamento de investigación y Desarrollo; Argentina; Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Centro de Referencia para Lactobacilos (i); Argentina; Fil: Perdigón, Gabriela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Centro de Referencia para Lactobacilos (i); Argentina; Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Microbiología; Argentina
- Published
- 2013
22. Probiotics in Inflammatory Bowel Diseases and Cancer Prevention
- Author
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Alejandra de Moreno de LeBlanc and Jean Guy LeBlanc
- Subjects
Cancer prevention ,biology ,Cancer ,Inflammation ,Gut flora ,medicine.disease_cause ,biology.organism_classification ,medicine.disease ,law.invention ,Clinical trial ,Probiotic ,Immune system ,law ,Immunology ,medicine ,medicine.symptom ,Oxidative stress - Abstract
Several studies have shown that specific probiotic strains are able to prevent the development of some diseases such as inflammatory bowel diseases (IBD) and certain types of cancer. Some of the proposed mechanisms of action that account for their beneficial effects include changes in the gut microbiota, stabilization of the intestine’s permeability barrier, regulation of the host immune responses, and reduction of the oxidative stress due to their antioxidant enzyme production. This chapter will examine some examples of studies using animal models and human clinical trials where probiotics were shown to be effective in the prevention or treatment of IBD and intestinal and nonintestinal cancers, and describe the current knowledge of their mechanisms of action. Probiotics could potentiate conventional treatments and reduce undesirable side effects and thus improve the general well-being of subjects that suffer from these diseases.
- Published
- 2016
23. Lactococcus lactis NCDO2118 produces anti-hypertensive GABA and exerts acute hypotensive in spontaneously hypertensive rats
- Author
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Alejandra de Moreno de LeBlanc, Preetam Ghosh, Marcela Santiago Pacheco de Azevedo, Cassiana Severiano de Sousa, Robson A.S. Santos, Tessália Diniz Luerce Saraiva, Jean Guy LeBlanc, Vasco Azevedo, Gisele M Etelvino, Debmalya Barh, Franco M. Venanzi, Mariana Assíria de Oliveira, and Henrique César Pereira Figueiredo
- Subjects
0301 basic medicine ,biology ,Strain (chemistry) ,Lactococcus ,Lactococcus lactis ,Glutamate decarboxylase ,Glutamate receptor ,Pharmacology ,biology.organism_classification ,law.invention ,Lactic acid ,03 medical and health sciences ,Probiotic ,chemistry.chemical_compound ,030104 developmental biology ,chemistry ,law ,Bacteria - Abstract
Gamma (γ)-aminobutyric acid (GABA) is a molecule with nutraceutical interest since it is recognized for its health-promoting properties such as hypotensive effects. Some lactic acid bacteria (LAB) have been shown to be able to produce GABA. In the present investigation, Lactococcus (L.) lactis NCDO2118, a probiotic LAB, was cultured in a medium supplemented with different concentration of glutamate, the substrate for GABA production. This strain was evaluated in SHRSP (Spontaneously Hypertensive Stroke-Prone Rats) to assess its hypotensive effect. The evaluation showed that GABA production is variable depending on the glutamate concentration and incubation time and that the increased GABA production potentiates its hypotensive effect. This work demonstrates that L. lactis NCDO 2118 could be used as a tool for developing health-promoting foods, such as those enriched with GABA as an interesting and novel pharmacological strategy.
- Published
- 2016
24. Probiotics: An alternative strategy for combating salmonellosis
- Author
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Natalia Alejandra Castillo, Alejandra de Moreno de LeBlanc, Gabriela Perdigón, and Carolina Maldonado Galdeano
- Subjects
Serotype ,Salmonella ,medicine.drug_class ,Antibiotics ,Salmonella infection ,Biology ,medicine.disease_cause ,medicine.disease ,Antimicrobial ,Microbiology ,law.invention ,Probiotic ,Immune system ,law ,Immunology ,medicine ,Pathogen ,Food Science - Abstract
Salmonella produces infections of different nature and severity depending of many factors including the Salmonella serovar involved, strain virulence, infective dose, host animal species, age and immune status of the host. The treatments against Salmonella infections rely on supportive and antibiotic therapy to eliminate the pathogen, but the development of resistance by Salmonella to the antimicrobials most commonly used limits its efficacy. Other disadvantages of antibiotic treatments are that they can lead to acute diarrhea (antimicrobials normally induce an imbalance of intestinal bacterial flora) and may produce chronic toxicity. Considering this undesired consequences of antibiotics and because at the present there are no effective oral vaccines which protect against salmonellosis, scientists have been searching for alternative methods to control enteric infections. In the present review, probiotics are proposed as an attractive possibility to attend this concern. Probiotic are live microorganisms, which when administered in adequate amounts confer a health benefit on the host. In vitro and in vivo studies showed the effectiveness of probiotic administration in the prevention or in the treatment against Salmonella infection. There are several mechanisms by which probiotic strains might exert their effects. They include non immune mechanisms (stabilization of the gut mucosal barrier, competition for adhesion, secretion of antimicrobial substances, etc.) and the modulation of the mucosal and systemic immune responses. These mechanisms are species and/or strain specific. There are also evidences that in some cases, a mix of probiotic strains can be more useful than each strain alone against this infection. In addition, the presence of one or more probiotic strains in a fermented product can improve the beneficial properties of the probiotic strains involved. It was also reviewed the security of probiotics administration after Salmonella infection in healthy host and in immunosuppressed or babies hosts. Although, the major part of the researches were performed in animal models through in vivo assays or by in vitro studies using human cell lines, some studies carried out in humans to verify the probiotic effects were also addressed in the present review. Nevertheless, is of critical importance to perform more clinical trials in humans to validate the results obtained with each specific probiotic strain or probiotic product.
- Published
- 2012
25. Potential Application of Probiotics in the Prevention and Treatment of Inflammatory Bowel Diseases
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Silvina del Carmen, Alejandra de Moreno de LeBlanc, Clarissa Santos Rocha, Jean Guy LeBlanc, Vasco Azevedo, and Anderson Miyoshi
- Subjects
Antioxidant ,Otras Ciencias Biológicas ,medicine.medical_treatment ,Biology ,Gut flora ,medicine.disease_cause ,Inflammatory bowel disease ,law.invention ,purl.org/becyt/ford/1 [https] ,Ciencias Biológicas ,Superoxide dismutase ,Probiotic ,Immune system ,LACTIC ACID BACTERIA ,law ,ANTIOXIDANT ,medicine ,purl.org/becyt/ford/1.6 [https] ,INFLAMMATORY BOWEL DISEASE ,Inflammatory Bowel Diseases ,biology.organism_classification ,medicine.disease ,PROBIOTICS ,Immunology ,biology.protein ,CIENCIAS NATURALES Y EXACTAS ,Oxidative stress - Abstract
Lactic acid bacteria (LAB) represent a heterogeneous group of microorganisms that are naturally present in many foods and possess a wide range of therapeutic properties. The aim of this paper is to present an overview of the current expanding knowledge of the mechanisms by which LAB and other probiotic microorganisms participate in the prevention and treatment of inflammatory bowel diseases. These include changes in the gut microbiota, stimulation of the host immune responses, and reduction of the oxidative stress due to their antioxidant properties. A brief overview of the uses of genetically engineered LAB that produce either antioxidant enzymes (such as catalase and superoxide dismutase) or anti-inflammatory cytokines (such as IL-10) will also be discussed. This paper will show that probiotics should be considered in treatment protocols of IBD since they provide many beneficial effects and can enhance the effectiveness of traditional used medicines. Fil: del Carmen, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Miyoshi, Anderson. Universidade Federal de Minas Gerais; Brasil Fil: Santos Rocha, Clarissa. Universidade Federal de Minas Gerais; Brasil Fil: Azevedo, Vasco. Universidade Federal de Minas Gerais; Brasil Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
- Published
- 2011
26. Anti-infective mechanisms induced by a probiotic Lactobacillus strain against Salmonella enterica serovar Typhimurium infection
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Gabriela Perdigón, Natalia Alejandra Castillo, and Alejandra de Moreno de LeBlanc
- Subjects
Salmonella typhimurium ,Salmonella ,Salmonella enteritidis ,Colony Count, Microbial ,medicine.disease_cause ,Microbiology ,law.invention ,Mice ,Probiotic ,Immune system ,Adjuvants, Immunologic ,law ,Intestine, Small ,medicine ,Animals ,Intestinal Mucosa ,Pathogen ,Inflammation ,Mice, Inbred BALB C ,Innate immune system ,biology ,Macrophages ,Probiotics ,food and beverages ,General Medicine ,Acquired immune system ,biology.organism_classification ,Immunoglobulin A ,Disease Models, Animal ,Lacticaseibacillus casei ,Neutrophil Infiltration ,Salmonella enterica ,Salmonella Infections ,Immunology ,Food Science - Abstract
The prevention of pathogen infections is one of the most extensively studied effects of probiotics. L. casei CRL 431 is a probiotic bacterium and its effects on the gut immune cells have been extensively studied. The aim of the present study was to determine, using a mouse model, the preventive and therapeutic effect of L. casei CRL 431 to achieve protection against Salmonella enteritidis serovar Typhimurium infection. In both previous and continuous (previous and post-infection) probiotic administration, the mechanisms induced by this lactic acid bacteria on the first line of intestinal defense (non-specific barrier and the innate immune cells associated to the gut), as a way to understand some of the mechanisms involved in the protection against Salmonella enteritidis serovar Typhimurium, were analyzed. The results obtained demonstrated that 7 days L. casei CRL 431 administration before infection decreased the severity of the infection with Salmonella enteritidis serovar Typhimurium, demonstrating that the continuous administration (even after infection) had the best effect. This continuous administration diminished the counts of the pathogen in the intestine as well as its spread outside this organ. Several mechanisms and cells are involved in this protective effect against Salmonella enteritidis serovar Typhimurium. L. casei CRL 431 acted on cells of the innate and adaptive immune response. The probiotic administration decreased the neutrophil infiltration with the consequent diminution of intestinal inflammation; activated the macrophage phagocytic activity in different sites such as Peyer's patches, spleen and peritoneum; and increased the number of IgA + cells in the lamina propria of the small intestine which was correlated with increased release of s-IgA specific against the pathogen in the intestinal fluids. The mechanism of the inhibition of cellular apoptosis was not involved.
- Published
- 2010
27. The application of probiotics in cancer
- Author
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Alejandra de Moreno de LeBlanc, Gabriela Perdigón, and Chantal Matar
- Subjects
CIENCIAS MÉDICAS Y DE LA SALUD ,Colorectal cancer ,Inmunología ,Medicine (miscellaneous) ,Breast Neoplasms ,COLON CANCER ,medicine.disease_cause ,law.invention ,Mice ,Probiotic ,Lymphocytes, Tumor-Infiltrating ,Immune system ,Breast cancer ,BREAST CANCER ,law ,INTESTINE ,Animals ,Humans ,Medicine ,Carcinogen ,Nutrition and Dietetics ,biology ,business.industry ,Probiotics ,food and beverages ,Cancer ,biology.organism_classification ,medicine.disease ,PROBIOTICS ,Disease Models, Animal ,Medicina Básica ,Colonic Neoplasms ,Immunology ,Cytokines ,business ,Carcinogenesis ,Bacteria - Abstract
Lactic acid bacteria (LAB) are present in many foods such as yoghurt and are frequently used as probiotics to favour some biological functions in the host. Many investigators have evaluated the therapeutic effects of yoghurt and LAB commonly used in yoghurt production against diseases such as cancer, infection, and gastrointestinal disorders. The increase of immune cell activity in the prevention of cancer by LAB consumption has also been described. Another possible explanation for the preventive effect of probiotics on carcinogenesis is their effect on other bacteria in the intestine. Probiotics may suppress the growth of bacteria that convert procarcinogens into carcinogens, thereby reducing the amount of carcinogens in the intestine. The present review is focused on two types of cancer in which milk fermented by LAB may show a beneficial effect: colon cancer and breast cancer. Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Matar, Chantal. Université de Moncton; Francia Fil: Perdigon, Gabriela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
- Published
- 2007
28. Current Review of Genetically Modified Lactic Acid Bacteria for the Prevention and Treatment of Colitis Using Murine Models
- Author
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Silvina del Carmen, Anderson Miyoshi, Vasco Azevedo, Jean-Marc Chatel, Alejandra de Moreno de LeBlanc, Jean Guy LeBlanc, Philippe Langella, Luis G. Bermúdez-Humarán, Consejo Nacional de Investigaciones Científicas y Técnicas, MICrobiologie de l'ALImentation au Service de la Santé (MICALIS), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Universidade Federal de Minas Gerais, Consejlho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Centro Brasileiro-Argentino de Biotecnologia (CBAB), Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES), Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT), and ECOS-SUD-MinCyT
- Subjects
CIENCIAS MÉDICAS Y DE LA SALUD ,medicine.medical_treatment ,[SDV]Life Sciences [q-bio] ,Inflammation ,Review Article ,Bioinformatics ,Biotecnología de la Salud ,law.invention ,Probiotic ,chemistry.chemical_compound ,INFLAMMATION ,LACTIC ACID BACTERIA ,law ,medicine ,purl.org/becyt/ford/3.4 [https] ,lcsh:RC799-869 ,Colitis ,Gastrointestinal tract ,Hepatology ,biology ,business.industry ,Gastroenterology ,biology.organism_classification ,medicine.disease ,3. Good health ,Genetically modified organism ,Lactic acid ,GENETICALLY MODIFIED ,Cytokine ,chemistry ,Immunology ,purl.org/becyt/ford/3 [https] ,lcsh:Diseases of the digestive system. Gastroenterology ,medicine.symptom ,business ,Bacteria ,Otras Biotecnologías de la Salud - Abstract
Inflammatory Bowel Diseases (IBD) are disorders of the gastrointestinal tract characterized by recurrent inflammation that requires lifelong treatments. Probiotic microorganisms appear as an alternative for these patients; however, probiotic characteristics are strain dependent and each probiotic needs to be tested to understand the underlining mechanisms involved in their beneficial properties. Genetic modification of lactic acid bacteria (LAB) was also described as a tool for new IBD treatments.The first part of this review shows different genetically modified LAB (GM-LAB) described for IBD treatment since 2000.Then, the two principally studied strategies are discussed (i) GM-LAB producing antioxidant enzymes and (ii) GM-LAB producing the anti-inflammatory cytokine IL-10. Different delivery systems, including protein delivery and DNA delivery, will also be discussed. Studies show the efficacy of GM-LAB (using different expression systems) for the prevention and treatment of IBD, highlighting the importance of the bacterial strain selection (with anti-inflammatory innate properties) as a promising alternative. These microorganisms could be used in the near future for the development of therapeutic products with anti-inflammatory properties that can improve the quality of life of IBD patients. Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: del Carmen, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Chatel, Jean Marc. Institut National de la Recherche Agronomique; Francia Fil: Miyoshi, Anderson. Universidade Federal do Minas Gerais; Brasil Fil: Azevedo, Vasco. Universidade Federal do Minas Gerais; Brasil Fil: Langella, Philippe. Institut National de la Recherche Agronomique; Francia Fil: Bermudez Humaran, Luis G.. Institut National de la Recherche Agronomique; Francia Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
- Published
- 2015
29. Effect of probiotic administration on the intestinal microbiota, current knowledge and potential applications
- Author
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Alejandra de Moreno de LeBlanc and Jean Guy LeBlanc
- Subjects
CIENCIAS MÉDICAS Y DE LA SALUD ,Colorectal cancer ,Ciencias de la Salud ,Disease ,Gut flora ,Inflammatory bowel disease ,law.invention ,Feces ,Probiotic ,purl.org/becyt/ford/3.3 [https] ,DYSBIOSIS ,law ,medicine ,Animals ,Humans ,Topic Highlight ,Irritable bowel syndrome ,biology ,Microbiota ,Probiotics ,GUT MICROBIOTA ,SYMBIOSIS ,Gastroenterology ,Ética Médica ,General Medicine ,TREATMENT ,biology.organism_classification ,medicine.disease ,Obesity ,PROBIOTICS ,Biological Therapy ,Intestines ,Intestinal Diseases ,Treatment Outcome ,Immunology ,purl.org/becyt/ford/3 [https] ,Dysbiosis - Abstract
Although it is now known that the human body is colonized by a wide variety of microbial populations in different parts (such as the mouth, pharynx and respiratory system, the skin, the gastro- and urogenital tracts), many effects of the complex interactions between the human host and microbial symbionts are still not completely understood. The dysbiosis of the gastrointestinal tract microbiota is considered to be one of the most important contributing factors in the development of many gastrointestinal diseases such as inflammatory bowel disease, irritable bowel syndrome and colorectal cancer, as well as systemic diseases like obesity, diabetes, atherosclerosis and non-alcoholic fatty liver disease. Fecal microbial transplantations appear to be promising therapies for dysbiosis-associated diseases; however, probiotic microorganisms have been growing in popularity due to increasing numbers of studies proving that certain strains present health promoting properties, among them the beneficial balance of the intestinal microbiota. Inflammatory bowel diseases and obesity are the pathologies in which there are more studies showing this beneficial association using animal models and even in human clinical trials. In this review, the association of the human gut microbiota and human health will be discussed along with the benefits that probiotics can confer on this symbiotic activity and on the prevention or treatment of associated diseases. Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Centro de Referencia Para Lactobacilos; Argentina Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Centro de Referencia Para Lactobacilos; Argentina
- Published
- 2014
30. Selection of Anti-Inflammatory Lactic Acid Bacteria From A Pool of Yoghurt Starter Cultures
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Vasco Azevedo, Alejandra de Moreno de LeBlanc, Anderson Miyoshi, Philippe Langella, Jean Guy LeBlanc, Silvina del Carmen, and Luis G. Bermúdez-Humarán
- Subjects
biology ,medicine.medical_treatment ,food and beverages ,biology.organism_classification ,Peripheral blood mononuclear cell ,In vitro ,Lactic acid ,law.invention ,Microbiology ,chemistry.chemical_compound ,Interleukin 10 ,Probiotic ,Cytokine ,chemistry ,In vivo ,law ,Lactobacillus ,medicine - Abstract
Inflammatory bowel diseases affect the quality of life of many people through the world. Previous studies demonstrated the anti-inflammatory potential of a yoghurt prepared with a pool of candidate probiotic strains of Lactobacillus (L.) delbrueckii subsp. bulgaricus and Streptococcus (S.) thermophilus from the CERELA Culture Collection. Considering that the probiotic effects are strain specific, the aim of this work was to select from this yoghurt, the LAB strains related to this anti-inflammatory effect and prove their potential in vitro and in vivo. M&M: L. delbrueckii subsp. bulgaricus (CRL861, 863, 864, 866, 869, 871, 872 and 887) and S. thermophilus (CRL806 and 807) were grown separately to obtain the fermented milks (FM). The in vitro anti-inflammatory capacity of each FM was studied in co-culture with mononuclear cells isolated from Peyer’s patches of healthy mice, by evaluating the cytokines IFNg and IL-10 in the supernatants. The in vitro selected FM were administered to healthy mice and to mice inoculated with TNBS (colitis model). Pro-inflammatory cytokines (IFNg, IL-17) and the regulatory cytokine IL-10 were evaluated in their intestines. Results: The in vitro studies demonstrated that the cocultures with FMs obtained with S. thermophilus CRL807 and L. bulgaricus 864 showed increased IL10/IFNγ ratios. This IL10/IFNγ ratio also increased in the intestinal fluids of healthy mice given these FMs. These mice also increased the ratio of IL10+ cells/IL17+ cells in their
- Published
- 2014
31. Oral administration of milk fermented by Lactobacillus casei CRL431 was able to decrease metastasis from breast cancer in a murine model by modulating immune response locally in the lungs.
- Author
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Mendez Utz, Virginia Emilce, Perdigón, Gabriela, and de Moreno de LeBlanc, Alejandra
- Abstract
Graphical abstract Highlights • Milk fermented by L. casei CRL431 (PFM) diminished lung metastasis in a mouse model. • PFM modulated the immune response to fight against tumour cells in the lungs. • Systemically, PFM administration modulated the inflammatory response. • Decreases of IL-10+ F4/80+ cells in lungs were associated to PFM beneficial effect. Abstract The host immune system is an important factor to combat metastasis. In this work, it was evaluated the immunomodulation exerted by milk fermented with the probiotic strain Lactobacillus casei CRL431 (PFM) when was administered to mice in the metastatic stage of breast cancer. Mice received PFM were compared to animals given milk. PFM administration diminished metastasis in the lungs and increased the survival of the animals. Systemically, PFM administration decreased pro-inflammatory cytokines and locally in the lungs (metastatic organs) decreased F4/80+ cells, principally IL-10/F4/80+ cells. The highest percentages for CD4+ and CD4+CD8+ cells were observed in PFM group. Finally, immune cells from lungs of mice given PFM showed lower production of most cytokines evaluated when they were re-stimulated in vitro with tumour cells. The results obtained suggest that modulation of immune cells in the lungs by PFM could be a strategy to fight against tumour cells in the metastatic sites. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
32. Tropical fruit by-products water extracts as sources of soluble fibres and phenolic compounds with potential antioxidant, anti-inflammatory, and functional properties.
- Author
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Albuquerque, Marcela Albuquerque Cavalcanti de, Levit, Romina, Beres, Carolina, Bedani, Raquel, de Moreno de LeBlanc, Alejandra, Saad, Susana Marta Isay, and LeBlanc, Jean Guy
- Abstract
Graphical abstract Highlights • Mango water extract had the highest total phenolic content and antioxidant activity. • Orange and mango water extracts decreased the highest levels of NO. • Mango water extract stimulated the folate production by the co-culture TH-4 and LGG. • All fruit by-product water extracts increased LGG adhesion to Caco-2 cells. Abstract Fibre content, phenolic content, antioxidant and anti-inflammatory activities were evaluated for water extracts of fruit by-products (passion fruit, orange, acerola, and mango). The impact of these extracts on microbial growth, folate production, and adhesion ability of Streptococcus thermophilus TH-4 and Lactobacillus rhamnosus LGG was investigated. Mango water extract (MWE) presented the highest phenolic content and antioxidant activity. Orange water extract (OWE) and MWE showed the best anti-inflammatory potential by decreasing the highest nitric oxide levels. When TH-4 and LGG were grown together, folate production was only stimulated by MWE. Passion fruit water extract and OWE increased the TH-4 adhesion whereas acerola water extracts and MWE improved LGG adhesion when strains were used individually. These results showed that fruit by-product water extracts (FWE), especially from mango, presented potential beneficial biological and functional properties. These FWE could be used to develop new functional antioxidant foods and natural pharmaceutical ingredients. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
33. Inflammatory Immune Response
- Author
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Gabriela Perdigón, J. C. Valdez, and A. de Moreno de LeBlanc
- Subjects
0301 basic medicine ,Colorectal cancer ,Microorganism ,Immunology ,lcsh:Medicine ,Inflammation ,Biology ,law.invention ,Microbiology ,03 medical and health sciences ,Probiotic ,chemistry.chemical_compound ,0302 clinical medicine ,Immune system ,law ,medicine ,Immunology and Allergy ,lcsh:R ,food and beverages ,medicine.disease ,biology.organism_classification ,Lactic acid ,030104 developmental biology ,chemistry ,030220 oncology & carcinogenesis ,medicine.symptom ,Bacteria - Abstract
Lactic acid bacteria (LAB) are the most commonly used microorganisms in probiotic products and it is known that these LAB enhanced the immune response and increase resistance to neoplasia and infections. In previous studies using an experimental model of BALB/c mice it was demonstrated that a cyclical diet of yoghurt given to animals previously injected with the carcinogen 1,2 dimethylhydrazine (DMH) inhibited the development of colorectal carcinoma. The animals showed an inflammatory response prior to the development of the tumour, which was diminished with the yoghurt feeding. We examined the immunoregulatory and antiinflammatory mechanisms involved in the inhibition of tumour growth by yoghurt and compared with the mechanisms of a non-steroidal antiinflammatory drug (Indomethacin). Five experimental groups (BALB/c mice) were used in this study: 1) DMH group, injected with 1,2 dimethylhydrazine weekly for 10 weeks. 2) DMH-yoghurt group, yoghurt was supplemented 10 days followed by inoculation with DMH. After tumour induction yoghurt was given every 10 days for six months. 3) Only yoghurt given during six months following the same schedule (yoghurt control. 4) DMH-indomethacin group. After tumour induction, animals were treated with indomethacin, injected cyclically. 5) Non-treatment control group fed with a conventional balanced diet. We studied IgA secreting cells and CD4+ and CD8+ T cells in the large intestine of mice fed long term with yoghurt and others treated with indomethacin. TNFα, INFγ cytokines, Bcl2 protein and iNOS enzyme production was also measured We observed an increase in the number of IgA-secreting cells but not in the CD4+ and CD8+ cells in the mice fed long term with yoghurt. Indomethacin treated mice showed high values of all these cellular populations. Mice injected with indomethacin did not show increased levels of the proinflammatory cytokine TNFα and INFγ. These cytokines were increased in DMH and DMH plus yoghurt groups. iNOS enzyme determinations were increased in DMH and DMH plus indomethacin group. These results coincided with the inflammatory response observed in the histological findings. Bcl-2 protein was increased in mice fed long term with yoghurt. We suggest that the immune mechanisms by which yoghurt operates would be different to those induced with the antiinflammatory drug indomethacin. Yoghurt activated the production of cytokines that could exert a regulation of the immune response by apoptosis induced by TNFα. We conclude that yoghurt down modulate the immune response and exert its antitumour activity by its antiinflammatory activity, a mechanism that is different with that of the antiinflammatory indomethacin.
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- 2004
34. Modification in the diet can induce beneficial effects against breast cancer
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Alejandra de Moreno de LeBlanc, Felix Aragón, and Gabriela Perdigón
- Subjects
CIENCIAS MÉDICAS Y DE LA SALUD ,Mediterranean diet ,Population ,Ciencias de la Salud ,law.invention ,chemistry.chemical_compound ,Probiotic ,purl.org/becyt/ford/3.3 [https] ,Immune system ,Breast cancer ,law ,BREAST CANCER ,medicine ,Topic Highlight ,Food science ,education ,education.field_of_study ,Cancer prevention ,business.industry ,PROBIOTIC ,food and beverages ,Cancer ,medicine.disease ,Biotechnology ,Lactic acid ,Otras Ciencias de la Salud ,Oncology ,chemistry ,NUTRITION ,purl.org/becyt/ford/3 [https] ,business ,FERMENTED PRODUCTS - Abstract
The population tends to consume foods that in addition to their nutritional values can offer some benefits to their health. There are many epidemiological evidences and research studies in animal models suggesting that diet plays an important role in breast cancer prevention or progression. This review summarized some of the relevant researches about nutrition and cancer during the last years, especially in breast cancer. The analysis of probiotics and fermented products containing lactic acid bacteria in cancer prevention and/or treatment was especially discussed. It was observed that a balance of fatty acids similar to those of traditional Mediterranean diet, the consumption of fruits and vegetables, dietary fiber intake, vitamin supplementation are, along with the intake of probiotic products, the most extensively studied by the negative association to breast cancer risk. The consumption of probiotics and fermented products containing lactic acid bacteria was associated to reduce breast cancer risk in some epidemiological studies. The use of animal models showed the modulation of the host?s immune response as one of the important effects associated to the benefices observed with most probiotics. However; future assays in human are very important before the medical community can accept the addition of probiotic or fermented milks containing lactic acid bacteria as supplements for cancer patients. Fil: Aragón, Félix Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Centro de Referencia Para Lactobacilos; Argentina Fil: Perdigon, Gabriela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Centro de Referencia Para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Microbiología; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Centro de Referencia Para Lactobacilos; Argentina
- Published
- 2014
35. The Administration of Probiotics and Fermented Products Containing Lactic Acid Bacteria Exert Beneficial Effects Against Intestinal and Non- Intestinal Cancers
- Author
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ra de Moreno de LeBlanc and Alej
- Subjects
Veterinary medicine ,CIENCIAS MÉDICAS Y DE LA SALUD ,Microorganism ,COLON CANCER ,law.invention ,chemistry.chemical_compound ,Probiotic ,law ,Medicine ,Food science ,Intestinal Cancer ,Beneficial effects ,Fermentation in food processing ,ANTI-TUMOR MECHANISMS ,biology ,business.industry ,Otras Medicina Básica ,food and beverages ,FERMENTED MILK ,biology.organism_classification ,PROBIOTICS ,Lactic acid ,Medicina Básica ,chemistry ,Fermentation ,NON-INTESTINAL TUMORS ,business ,Bacteria - Abstract
Probiotic microorganisms and fermented foods containing lactic acid bacteria have been growing in popularity due to increasing numbers of studies proving that certain strains present health promoting properties, among them the prevention or treatment in the early stages of some types of cancers. There are many reports about the anticarcinogenic effect ofprobiotic strains and fermented products against intestinal and non intestinal tumors. Different mechanisms of action can be involved in these beneficial effects, being the modulation of the host?s immunity one of the most important properties reported using in vitro assays and also in animal models. However, there are few human trials in which the application of probiotics as biotherapeutics against cancer were tested. These assays are very important before the medical community can accept the addition of probiotic or fermented milks as supplements for cancer patients. This review summarizes some of the relevant research with probiotics and fermented products containing lactic acid bacteria in cancer prevention and / or treatment with emphasis on the possible mechanisms involved. Colon cancer is one of the types of cancer for which there are more researches and will be discussed separately from the non intestinal tumours. Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Centro de Referencia para Lactobacilos (i); Argentina
- Published
- 2014
36. Mucosal targeting of therapeutic molecules using genetically modified lactic acid bacteria: an update
- Author
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Luis G. Bermúdez-Humarán, Vasco Azevedo, Alejandra de Moreno de LeBlanc, Jean Guy LeBlanc, Jean-Marc Chatel, Camille Aubry, Philippe Langella, Anderson Miyoshi, Nathalie Vergnolle, Naima G. Cortes-Perez, Fac Med, Catedra Metodol Invest Cient, Univ Nacl Tucuman, Centro de Referencia para Lactobacilos [Tucumán] (CERELA), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET), MICrobiologie de l'ALImentation au Service de la Santé (MICALIS), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Centre de Physiopathologie Toulouse Purpan ex IFR 30 et IFR 150 (CPTP), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), ICB, Univ Fed Minas Gerais, CONICET, ANPCyT, CIUNT, ECOS-Sud, CABBIO, CAPES-COFECUB, CAPES, CNPq, Centre de Physiopathologie Toulouse Purpan (CPTP), Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
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LACTOBACILLUS-CASEI ,[SDV.SA]Life Sciences [q-bio]/Agricultural sciences ,Lactococcus ,law.invention ,Probiotic ,chemistry.chemical_compound ,law ,Lactobacillus ,COMPLETE GENOME SEQUENCE ,mucosal vaccines ,0303 health sciences ,Vaccines ,biology ,IMMUNE-RESPONSES ,VACCINE DELIVERY ,Therapeutic Molecules ,3. Good health ,Lactic acid ,Genetically modified organism ,therapeutic molecules ,Cytokines ,ORAL IMMUNIZATION ,Lactobacillus casei ,Otras Ingenierías y Tecnologías ,Genetic Vectors ,STREPTOCOCCUS-LACTIS ,INGENIERÍAS Y TECNOLOGÍAS ,Microbiology ,03 medical and health sciences ,GROWTH-FACTOR-I ,Genetics ,Lactic Acid Bactera ,Animals ,Humans ,LACTOCOCCUS-LACTIS ,Molecular Biology ,BALB/C MICE ,030304 developmental biology ,purl.org/becyt/ford/2.11 [https] ,Mucous Membrane ,030306 microbiology ,Probiotics ,Lactococcus lactis ,EXPRESSING INTERLEUKIN-10 ,biology.organism_classification ,cytokines ,lactic acid bacteria ,chemistry ,purl.org/becyt/ford/2 [https] ,Mucosal Vaccines ,Bacteria - Abstract
Lactic acid bacteria (LAB) represent a heterogeneous group of microorganisms naturally present in many foods and those have proved to be effective mucosal delivery vectors. Moreover, some specific strains of LAB exert beneficial properties (known as probiotic effect) on both human and animal health. Although probiotic effects are strain-specific traits, it is theoretically possible, using genetic engineering techniques, to design strains that can exert a variety of beneficial properties. During the two past decades, a large variety of therapeutic molecules has been successfully expressed in LAB, and although this field has been largely reviewed in recent years, approximately 20 new publications appear each year. Thus, the aim of this minireview is not to extensively assess the entire literature but to update progress made within the last 2 years regarding the use of the model LAB Lactococcus lactis and certain species of lactobacilli as live recombinant vectors for the development of new safe mucosal vaccine. Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Centro de Referencia Para Lactobacilos (i); Argentina; Universidad Nacional de Tucuman. Facultad de Medicina. Departamento de Investigacion. Catedra de Metodologia de la Invest.cientifica; Argentina; Fil: Aubry, Camille. Institut National de la Recherche Agronomique; Francia; Fil: Cortes-Perez, Naima G.. Institut National de la Recherche Agronomique; Francia; Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Centro de Referencia Para Lactobacilos (i); Argentina; Fil: Vergnolle, Nathalie. INSERM; Francia; Centre National de la Recherche Scientifique; Francia; Universite Paul Sabatier; Francia; Fil: Langella, Philippe. Institut National de la Recherche Agronomique; Francia; Fil: Azevedo, Vasco. Universidade Federal Do Minas Gerais; Brasil; Fil: Chatel, Jean-Marc. Institut National de la Recherche Agronomique; Francia; Fil: Miyoshi, Anderson. Universidade Federal Do Minas Gerais; Brasil; Fil: Berúdez-Humarán, Luis G.. Institut National de la Recherche Agronomique; Francia
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- 2013
37. Effect of a probiotic fermented milk on the thymus in a non-sever protein-energy-malnutrition model in mice
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R. Weill, I. Novotny-Núñez, A. de Moreno de LeBlanc, Esteban Carmuega, C. Maldonado-Galdeano, and Gabriela Perdigón
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Probiotic ,Nutrition and Dietetics ,Protein–energy malnutrition ,law ,medicine ,Medicine (miscellaneous) ,Fermentation ,Food science ,Biology ,medicine.disease ,law.invention - Published
- 2013
38. Probiotic Bacteria as Mucosal Immune System Adjuvants
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M.E. Bibas Bonet, A. de Moreno de LeBlanc, Gabriela Perdigón, C. Maldonado Galdeano, and C.A. Dogi
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Microorganism ,medicine.medical_treatment ,Immunosuppression ,Biology ,Microbiology ,law.invention ,Probiotic ,Immune system ,Pharmacotherapy ,law ,Immunology ,medicine ,Probiotic bacteria ,Mucosal immunity - Abstract
Probiotic microorganisms have a positive impact on health and improve the host immune system. Studies in animals and humans have demonstrated that probiotic bacteria can immunomodulate the systemic and mucosal immunity, protect against enteropathogens or offer antitumoral activities, and improve health in immunosuppression by malnutrition or drug therapy.
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- 2013
39. Effect of riboflavin-producing bacteria against chemically induced colitis in mice.
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Levit, R., Savoy de Giori, G., de Moreno de LeBlanc, A., and LeBlanc, J. G.
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COLITIS ,LACTIC acid bacteria ,INFLAMMATORY bowel diseases ,CROHN'S disease ,INFLAMMATORY bowel disease treatment - Abstract
Aim To assess the anti-inflammatory effect associated with individual probiotic suspensions of riboflavin-producing lactic acid bacteria ( LAB) in a colitis murine model. Methods and Results Mice intrarectally inoculated with trinitrobenzene sulfonic acid ( TNBS) were orally administered with individual suspensions of riboflavin-producing strains: Lactobacillus (Lact.) plantarum CRL2130, Lact. paracasei CRL76, Lact. bulgaricus CRL871 and Streptococcus thermophilus CRL803; and a nonriboflavin-producing strain or commercial riboflavin. The extent of colonic damage and inflammation and microbial translocation to liver were evaluated. iNOs enzyme was analysed in the intestinal tissues and cytokine concentrations in the intestinal fluids. Animals given either one of the four riboflavin-producing strains showed lower macroscopic and histologic damage scores, lower microbial translocation to liver, significant decreases of iNOs+ cells in their large intestines and decreased proinflammatory cytokines, compared with mice without treatment. The administration of pure riboflavin showed similar benefits. Lact. paracasei CRL76 accompanied its anti-inflammatory effect with increased IL-10 levels demonstrating other beneficial properties in addition to the vitamin production. Conclusion Administration of riboflavin-producing strains prevented the intestinal damage induced by TNBS in mice. Significance and Impact of the Study Riboflavin-producing phenotype in LAB represents a potent tool to select them for preventing/treating IBD. [ABSTRACT FROM AUTHOR]
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- 2018
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40. Prospective uses of genetically engineered lactic acid bacteria for the prevention of inflammatory bowel diseases
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Anderson Miyoshi, Alejandra de Moreno de LeBlanc, Jean Guy LeBlanc, Silvina del Carmen, Meritxell Zurita Turk, Fernanda Alvarenga Lima, Vasco Azevedo, and Lule, Godfrey
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biology ,INFLAMMATORY BOWEL DISEASE ,Disease ,Gut flora ,medicine.disease ,biology.organism_classification ,Ulcerative colitis ,Inflammatory bowel disease ,Microbiology ,law.invention ,purl.org/becyt/ford/1 [https] ,Pathogenesis ,SUPEROXIDE DISMUTASE ,Ciencias Biológicas ,Probiotic ,Immune system ,Biología Celular, Microbiología ,law ,LACTIC ACID BACTERIA ,Immunology ,medicine ,CATALASE ,Intestinal Disorder ,purl.org/becyt/ford/1.6 [https] ,CIENCIAS NATURALES Y EXACTAS - Abstract
Inflammatory bowel disease (IBD) is a term used to describe a group of intestinal disorders in which inflammation is a major feature. Although rare forms of IBD exist, these diseases normally pertain to ulcerative colitis (UC) (Head & Jurenka, 2003) and Crohn’s disease (CD) (Baumgart & Sandborn, 2007). There is evidence that these do not represent distinct conditions but rather are the same disease with shared etiological factors (Price, 1992); however, clinical manifestations (such as the exact location of the pathology or the affected individual’s immunological and constitutional endowment) are distinctive between both. Despite many years of study, the exact etiology and pathogenesis of these disorders remain unclear but great advances have been made using experimental animal models and have provided insights into the complex, multi-factorial processes and mechanisms that can result in chronic intestinal inflammation (Elson & Weaver, 2003). The aim of this chapter is to present an overview of the current expanding knowledge of the mechanisms by which lactic acid bacteria and other probiotic microorganisms participate in the prevention and treatment of IBD and how genetic engineering techniques can be used to improve their effectiveness or create novel therapeutic strains. In the following sections, the mechanisms by which these beneficial microorganisms exert their therapeutic effects, which include changes in the gut microbiota, stimulation of the host immune responses, enhancement of intestinal barrier function and reduction of the oxidative stress due to their antioxidant properties will be discussed. Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: del Carmen, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Alvarenga Lima, Fernanda. Universidade Federal de Minas Gerais; Brasil Fil: Zurita Turk, Meritxell. Universidade Federal de Minas Gerais; Brasil Fil: Miyoshi, Anderson. Universidade Federal de Minas Gerais; Brasil Fil: Azevedo, Vasco. Universidade Federal de Minas Gerais; Brasil Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
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- 2012
41. Saccharomyces cerevisiae strains retain their viability and aflatoxin B1 binding ability under gastrointestinal conditions and improve ruminal fermentation
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Carlos Alberto da Rocha Rosa, R Ludueña, R Armando, C.A. Dogi, A. de Moreno de LeBlanc, Lilia Reneé Cavaglieri, and Ana Maria Dalcero
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Aflatoxin ,Aflatoxin B1 ,Rumen ,Health, Toxicology and Mutagenesis ,Saccharomyces cerevisiae ,Biology ,Toxicology ,law.invention ,Microbiology ,Probiotic ,Species Specificity ,law ,Animals ,Gastrointestinal tract ,Probiotics ,Public Health, Environmental and Occupational Health ,General Chemistry ,General Medicine ,Hydrogen-Ion Concentration ,biology.organism_classification ,Fatty Acids, Volatile ,Animal Feed ,Yeast ,Gastrointestinal Tract ,Fermentation ,Cattle ,Digestion ,Bacteria ,Food Science - Abstract
The aim was to evaluate both the ability of yeast strains to survive and bind AFB(1) under ruminant gastrointestinal conditions and the effect of these yeast strains on ruminal fermentation. Yeast viability was studied under simulated gastrointestinal conditions. AFB(1) binding ability was evaluated at different pH values as present in the ruminant gastrointestinal tract. The effect of yeast strains on cellulose digestion and volatile fatty acids production by ruminal bacteria was also evaluated. All yeast strains were able to survive under gastrointestinal conditions and to adsorb AFB(1) at the different pH assayed. The strain RC016 showed the highest binding percentage at the three tested pH. The number of cellulolytic bacteria in ruminal fluid increased in the presence of RC008 and RC016 yeast strains. The concentration of acetate and propionate after ruminal fermentation increased with the addition of RC008 and RC016 strains; this effect was less significant with RC009 strain. Strains RC008 and RC016 are potential probiotic to be included in animal feed: they help to increase fibber digestibility and could reduce AFB(1 )bioavailability in the gastrointestinal tract. Viable S. cerevisiae RC008 and RC016 strains with both probiotic and mycotoxins adsorption properties could be used as feed additives in ruminant feedstuff.
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- 2011
42. Impact of a probiotic fermented milk in the gut ecosystem and in the systemic immunity using a non-severe protein-energy-malnutrition model in mice
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Carolina Maldonado Galdeano, Alejandra de Moreno de LeBlanc, Ricardo Weill, Ivanna Novotny Núñez, Gabriela Perdigón, and Esteban Carmuega
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Salmonella typhimurium ,Protein–energy malnutrition ,medicine.medical_treatment ,CD8-Positive T-Lymphocytes ,law.invention ,purl.org/becyt/ford/1 [https] ,Mice ,Probiotic ,Intestinal mucosa ,law ,Intestine, Small ,SYSTEMIC IMMUNITY ,Medicine ,Intestinal Mucosa ,Bifidobacterium ,Microbiological Phenomena ,Mice, Inbred BALB C ,biology ,Gastroenterology ,food and beverages ,General Medicine ,MALNUTRITION ,Milk ,medicine.anatomical_structure ,Salmonella Infections ,Cytokines ,Goblet Cells ,Adjuvant ,CIENCIAS NATURALES Y EXACTAS ,Research Article ,Otras Ciencias Biológicas ,Spleen ,Protein-Energy Malnutrition ,Microbiology ,Ciencias Biológicas ,Immune system ,Phagocytosis ,Antigen ,Albumins ,Animals ,lcsh:RC799-869 ,purl.org/becyt/ford/1.6 [https] ,Analysis of Variance ,business.industry ,Macrophages ,Probiotics ,PROBIOTIC FERMENTED MILK ,Dendritic Cells ,INTESTINAL IMMUNITY ,medicine.disease ,biology.organism_classification ,CD4 Lymphocyte Count ,Disease Models, Animal ,Fermentation ,Immunology ,lcsh:Diseases of the digestive system. Gastroenterology ,business - Abstract
Background: Malnutrition affects the immune response, causing a decrease of defence mechanisms and making the host more susceptible to infections. Probiotics can reconstitute the intestinal mucosa and stimulate local and systemic immunity. The aim of this work was evaluate the effects of a probiotic fermented milk as a complement of a re-nutrition diet, on the recovery of the intestinal barrier, and mucosal and systemic immune functions in a murine model of non-severe protein-energy-malnutrition. Its potential protection against Salmonella enterica serovar Typhimurium (S. Typhimurium) infection was also analyzed.Methods: Mice were undernourished and divided into 3 groups according to the dietary supplement received during re-nutrition (milk, probiotic fermented milk or its bacterial free supernatant) and compared to well-nourished and malnourished mice. They were sacrificed previous to the re-nutrition and 5 days post re-nutrition. The phagocytic activity of macrophages from spleen and peritoneum and the changes in the intestinal histology and microbiota were evaluated. Different immune cell populations and cytokine productions were analyzed in the small intestine tissues. The effect of the re-nutrition supplements on the systemic immunity using OVA antigen and against an infection with S. Typhimurium was also studied.Results: Probiotic fermented milk was the most effective re-nutrition diet that improved the intestinal microbiota. Its administration also increased the number of IgA+ cells, macrophages and dendritic cells. The production of different cytokine (IFN-γ, TNF-α, IL-12) by these cells and the phagocytic activity in peritoneum and spleen was also increased. This re-nutrition diet also stimulated the systemic immune response against OVA antigen which was diminished after the malnutrition period and also improved the host response against S. Typhimurium, decreasing the spread of pathogenic bacteria to the liver and the spleen. The importance of the metabolites released during milk fermentation was also demonstrated through the analysis of the bacterial free supernatant obtained from the probiotic fermented milk, but the whole product showed the best effects in the parameters evaluated in this study.Conclusions: The administration of probiotic fermented milk as a dietary supplement during the re-nutrition process in a murine immunodeficiency model by malnutrition could be a good adjuvant diet to improve the gut and systemic immune response for the protection against Salmonella infection. Fil: Maldonado Galdeano, María Carolina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Novotny Núñez, Ivanna. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Carmuega, Esteban. Nutritia; Argentina Fil: Weill, Ricardo. DANONE. Departamento de Investigación y Desarrollo; Argentina Fil: Perdigon, Gabriela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina
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- 2011
43. Oral administration of a probiotic Lactobacillus modulates cytokine production and TLR expression improving the immune response against Salmonella enterica serovar Typhimurium infection in mice
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Natalia Alejandra Castillo, Alejandra de Moreno de LeBlanc, and Gabriela Perdigón
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Microbiology (medical) ,Salmonella typhimurium ,Lactobacillus casei ,Salmonella ,CIENCIAS MÉDICAS Y DE LA SALUD ,L. CASEI CRL 431 ,medicine.medical_treatment ,lcsh:QR1-502 ,Inmunología ,Administration, Oral ,Salmonella infection ,medicine.disease_cause ,Microbiology ,lcsh:Microbiology ,law.invention ,Rodent Diseases ,Probiotic ,Mice ,Immune system ,law ,medicine ,Animals ,Humans ,IMMUNE MECHANISMS ,Mice, Inbred BALB C ,Salmonella Infections, Animal ,biology ,Probiotics ,Toll-Like Receptors ,purl.org/becyt/ford/3.1 [https] ,SALMONELLA ,biology.organism_classification ,medicine.disease ,Gastroenteritis ,Medicina Básica ,TLR2 ,Disease Models, Animal ,Lacticaseibacillus casei ,Cytokine ,Treatment Outcome ,Salmonella enterica ,MUCOSAL IMMUNITY ,Immunology ,Cytokines ,purl.org/becyt/ford/3 [https] ,Research Article - Abstract
Background Diarrheal infections caused by Salmonella, are one of the major causes of childhood morbidity and mortality in developing countries. Salmonella causes various diseases that range from mild gastroenteritis to enteric fever, depending on the serovar involved, infective dose, species, age and immune status of the host. Probiotics are proposed as an attractive alternative possibility in the prevention against this pathogen infection. Previously we demonstrated that continuous Lactobacillus casei CRL 431 administration to BALB/c mice before and after challenge with Salmonella enterica serovar Typhimurium (S. Typhimurium) decreased the severity of Salmonella infection. The aim of the present work was to deep into the knowledge about how this probiotic bacterium exerts its effect, by assessing its impact on the expression and secretion of pro-inflammatory (TNFα, IFNγ) and anti-inflammatory (IL-10) cytokines in the inductor and effector sites of the gut immune response, and analyzing toll-like receptor (TLR2, TLR4, TLR5 and TLR9) expressions in both healthy and infected mice. Results Probiotic administration to healthy mice increased the expression of TLR2, TLR4 and TLR9 and improved the production and secretion of TNFα, IFNγ and IL-10 in the inductor sites of the gut immune response (Peyer's patches). Post infection, the continuous probiotic administration, before and after Salmonella challenge, protected the host by modulating the inflammatory response, mainly in the immune effector site of the gut, decreasing TNFα and increasing IFNγ, IL-6 and IL-10 production in the lamina propria of the small intestine. Conclusions The oral administration of L. casei CRL 431 induces variations in the cytokine profile and in the TLRs expression previous and also after the challenge with S. Typhimurium. These changes show some of the immune mechanisms implicated in the protective effect of this probiotic strain against S. Typhimurium, providing an alternative way to reduce the severity of the infection.
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- 2011
44. Importance of IL-10 Modulation by Probiotic Microorganisms in Gastrointestinal Inflammatory Diseases
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Jean Guy LeBlanc, Silvina del Carmen, Clarissa Santos Rocha, Alejandra de Moreno de LeBlanc, Vasco Azevedo, Meritxell Zurita-Turk, Maarten van de Guchte, Anderson Miyoshi, Centro de Referencia para Lactobacilos [Tucumán] (CERELA), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET), Institute of Biological Sciences, Universidade Federal de Minas Gerais, MICrobiologie de l'ALImentation au Service de la Santé (MICALIS), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, and Institute of Biological Science
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Interleukin 10 ,probiotic microorganisms ,gastrointestinal inflammatory diseases ,Microorganism ,[SDV]Life Sciences [q-bio] ,Otras Ciencias Biológicas ,Disease ,Review Article ,microorganisme probiotique ,law.invention ,purl.org/becyt/ford/1 [https] ,Ciencias Biológicas ,03 medical and health sciences ,Probiotic ,0302 clinical medicine ,Immune system ,Mediator ,law ,LACTIC ACID BACTERIA ,Medicine ,purl.org/becyt/ford/1.6 [https] ,inflammation gastrointestinale ,030304 developmental biology ,0303 health sciences ,Heterogeneous group ,business.industry ,Genetically engineered ,PROBIOTICS ,Biotechnology ,interleukine 10 ,GASTROINTESTINAL INFLAMMATORY DISEASE ,Immunology ,IL-10 ,030211 gastroenterology & hepatology ,business ,CIENCIAS NATURALES Y EXACTAS - Abstract
Lactic acid bacteria (LAB) represent a heterogeneous group of microorganisms that are naturally present in many foods and possess a wide range of therapeutic properties. The aim of this paper is to present an overview of the current expanding knowledge of one of the mechanisms by which LAB and other probiotic microorganisms participate in the prevention and treatment of gastrointestinal inflammatory disease through their immune-modulating properties. A special emphasis will be placed on the critical role of the anti-inflammatory cytokine IL-10, and a brief overview of the uses of genetically engineered LAB that produce this important immune response mediator will also be discussed. Thus, this paper will demonstrate the critical role that IL-10 plays in gastrointestinal inflammatory diseases and how probiotics could be used in their treatment. Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: del Carmen, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Zurita Turk, Meritxell. Universidade Federal de Minas Gerais; Brasil Fil: Santos Rocha, Clarissa. Universidade Federal de Minas Gerais; Brasil Fil: van de Guchte, Maarten. Institut National de la Recherche Agronomique; Francia Fil: Azevedo, Vasco. Universidade Federal de Minas Gerais; Brasil Fil: Miyoshi, Anderson. Universidade Federal de Minas Gerais; Brasil Fil: Leblanc, Jean Guy Joseph. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina
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- 2011
45. Mechanisms involved in the immunostimulation by probiotic fermented milk
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Esteban Carmuega, Alejandra de Moreno de LeBlanc, Ricardo Weill, Carolina Maldonado Galdeano, and Gabriela Perdigón
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Cultured Milk Products ,Population ,Immunoglobulins ,Biology ,law.invention ,Microbiology ,Probiotic ,Mice ,Immune system ,Intestinal mucosa ,Adjuvants, Immunologic ,law ,Lactobacillus ,Animals ,Lymphocytes ,Intestinal Mucosa ,education ,education.field_of_study ,Mice, Inbred BALB C ,Innate immune system ,NFATC Transcription Factors ,Interleukin-6 ,Probiotics ,NFAT ,General Medicine ,biology.organism_classification ,Immunoglobulin A ,Intestines ,Lacticaseibacillus casei ,Gene Expression Regulation ,Animal Science and Zoology ,Goblet Cells ,Bacteria ,Food Science - Abstract
The intestinal ecosystem contains a normal microbiota, non-immune cells and immune cells associated with the intestinal mucosa. The mechanisms involved in the modulation of the gut immune system by probiotics are not yet completely understood. The present work studies the effect of a fermented milk containing probiotic bacteriumLactobacillus(Lb.)caseiDN114001 on different parameters of the gut immune system involved with the nonspecific, innate and adaptive response. BALB/c mice received the probiotic bacteriumLb. caseiDN114001 or the probiotic fermented milk (PFM). The interaction of the probiotic bacteria with the intestine was studied by electron and fluorescence microscopy. The immunological parameters were studied in the intestinal tissue and in the supernatant of intestinal cells (IC). Results showed that the probiotic bacterium interact with the IC. The whole bacterium or its fragments make contact with the gut associated immune cells. The PFM stimulated the IC with IL-6 release, as well as cells related to the nonspecific barrier and with the immune cells associated with the gut. This last activity was observed through the increase in the population of different immune cells: T lymphocytes and IgA+ B lymphocytes, and by the expression of cell markers related to both innate and adaptive response (macrophages). PFM was also able to activate the enzyme calcineurine responsible for the activation of the transcriptional factor NFAT. PFM induced mucosal immune stimulation reinforcing the non-specific barrier and modulating the innate immune response in the gut, maintaining the intestinal homeostasis.
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- 2009
46. Effect of the administration of a fermented milk containing Lactobacillus casei DN-114001 on intestinal microbiota and gut associated immune cells of nursing mice and after weaning until immune maturity
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Carolina Maldonado Galdeano, Cecilia Ana Dogi, Gabriela Perdigón, Esteban Carmuega, Alejandra de Moreno de LeBlanc, and Ricardo Weill
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Immunoglobulin A ,lcsh:Immunologic diseases. Allergy ,Lactobacillus casei ,Offspring ,Cultured Milk Products ,Immunology ,Population ,law.invention ,Probiotic ,Mice ,Immune system ,Nursing ,Intestinal mucosa ,law ,Immunity ,Animals ,Lactation ,Intestinal Mucosa ,education ,education.field_of_study ,Mice, Inbred BALB C ,biology ,Bacteria ,Macrophages ,Probiotics ,Dendritic Cells ,biology.organism_classification ,Immunity, Innate ,Intestines ,Lacticaseibacillus casei ,Immunoglobulin A, Secretory ,biology.protein ,bacteria ,Female ,Goblet Cells ,lcsh:RC581-607 ,Research Article - Abstract
BackgroundMicrobial colonization of the intestine after birth is an important step for the development of the gut immune system. The acquisition of passive immunity through breast-feeding may influence the pattern of bacterial colonization in the newborn. The aim of this work was to evaluate the effect of the administration of a probiotic fermented milk (PFM) containing yogurt starter cultures and the probiotic bacteria strainLactobacillus caseiDN-114001 to mothers during nursing or their offspring, on the intestinal bacterial population and on parameters of the gut immune system.ResultsFifteen mice of each group were sacrificed at ages 12, 21, 28 and 45 days. Large intestines were taken for determination of intestinal microbiota, and small intestines for the study of secretory-IgA (S-IgA) in fluid and the study of IgA+ cells, macrophages, dendritic cells and goblet cells on tissue samples. The consumption of the PFM either by the mother during nursing or by the offspring after weaning modified the development of bifidobacteria population in the large intestine of the mice. These modifications were accompanied with a decrease of enterobacteria population. The administration of this PFM to the mothers improved their own immune system and this also affected their offspring. Offspring from mice that received PFM increased S-IgA in intestinal fluids, which mainly originated from their mother's immune system. A decrease in the number of macrophages, dendritic cells and IgA+ cells during the suckling period in offspring fed with PFM was observed; this could be related with the improvement of the immunity of the mothers, which passively protect their babies. At day 45, the mice reach maturity of their own immune system and the effects of the PFM was the stimulation of their mucosal immunity.ConclusionThe present work shows the beneficial effect of the administration of a PFM not only to the mothers during the suckling period but also to their offspring after weaning and until adulthood. This effect positively improved the intestinal microbiota that are related with a modulation of the gut immune response, which was demonstrated with the stimulation of the IgA + cells, macrophages and dendritic cells.
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- 2008
47. Proposed Model: Mechanisms of Immunomodulation Induced by Probiotic Bacteria▿
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Gabriela Perdigón, A. de Moreno de LeBlanc, G. Vinderola, C. Maldonado Galdeano, and M.E. Bibas Bonet
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Microbiology (medical) ,CIENCIAS MÉDICAS Y DE LA SALUD ,Clinical Biochemistry ,Immunology ,Inmunología ,Gut flora ,Microbiology ,law.invention ,Probiotic ,law ,Immunology and Allergy ,Probiotic bacteria ,Animals ,Humans ,IMMUNE MECHANISMS ,Immune mechanisms ,Mucous Membrane ,biology ,Bacteria ,Probiotics ,PROBIOTIC ,Models, Immunological ,IMMUNOMODULATION ,Epithelial Cells ,biology.organism_classification ,Intestines ,Medicina Básica ,Minireview - Abstract
The mammalian microbiota comprises several hundred different bacterial species, many of which have a beneficial effect on the host. For example, they are involved in preventing colonization of the gut by pathogens and maintaining the gut mucosal immunity (85). The gut microbiota is more abundant in the large intestine of mammals, with densities rising to over 1011 organisms/g intestinal content (84, 86). The number of bacterial cells in the entire gut exceeds the number of eukaryotic cells in the host, but under normal circumstance they coexist without any adverse effect on the host. The influence of the resident microflora on mucosal immune function and gut health has become an area of scientific and clinical importance (22, 26). There is an active dialogue between the commensal microorganisms and the host mucosal immune system (21, 48). This cross talk elicits different host responses to commensal and pathogenic bacteria. Commensal bacteria may even share molecular patterns recognized by toll-like receptors (TLRs), which can recognize patterns associated mainly with pathogens. However, the mucosal immune system of the healthy intestine allows the persistence of this microbiota associated with the intestine and avoids immunological tolerance, maintaining the intestinal homeostasis. Now, there is acceptance of the concept that oral tolerance is not generated by commensal intestinal bacteria; the host would ignore or fail to recognize the presence of indigenous microorganisms (49). The healthy host is able to elicit a good mucosal immune response against luminal antigens and to maintain a “physiological state of inflammation” in the gut, but it is also capable of responding to invading commensal organisms or pathogens. In the healthy host the penetration of the commensal bacteria is usually prevented by the barrier afforded by the intestinal epithelium and the immune cells associated with the mucosa, which are highly adapted to the presence of the normal microbiota (71). The signals sent by these microorganisms prevent their penetration and keep them outside the intestinal tissue. If the commensal microorganisms invade the host tissues, the innate immune mechanisms contribute to their rapid clearance, but when pathogens enter the intestine, innate and adaptive mechanisms are coordinately stimulated to respond to the danger signals (38, 60). Although mucosal epithelial tissues form an efficient barrier that prevents the entrance of the environmental pathogens and the external antigens into the host internal milieu, mucosal tissues represent the main sites of infection by pathogens. Many attempts have been made to understand the gut immunomodulation by pathogenic bacteria but not the mechanisms involved in the modulation of the gut immune system by commensal bacteria and by nonpathogenic microorganisms present in many foods included in the daily diet. Fil: Maldonado Galdeano, María Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina Fil: de Moreno, Maria Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina Fil: Vinderola, Celso Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina Fil: Bibas Bonet, María Eugenia. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina Fil: Perdigon, Gabriela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina
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- 2007
48. Probiotics: An alternative strategy for combating salmonellosis: Immune mechanisms involved
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Castillo, Natalia A., de Moreno de LeBlanc, Alejandra, Galdeano, Carolina Maldonado, and Perdigón, Gabriela
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PROBIOTICS , *SALMONELLA disease treatment , *FOOD microbiology , *MICROBIAL virulence , *IMMUNE system , *ANTIBIOTICS , *ANTI-infective agents - Abstract
Abstract: Salmonella produces infections of different nature and severity depending of many factors including the Salmonella serovar involved, strain virulence, infective dose, host animal species, age and immune status of the host. The treatments against Salmonella infections rely on supportive and antibiotic therapy to eliminate the pathogen, but the development of resistance by Salmonella to the antimicrobials most commonly used limits its efficacy. Other disadvantages of antibiotic treatments are that they can lead to acute diarrhea (antimicrobials normally induce an imbalance of intestinal bacterial flora) and may produce chronic toxicity. Considering this undesired consequences of antibiotics and because at the present there are no effective oral vaccines which protect against salmonellosis, scientists have been searching for alternative methods to control enteric infections. In the present review, probiotics are proposed as an attractive possibility to attend this concern. Probiotic are live microorganisms, which when administered in adequate amounts confer a health benefit on the host. In vitro and in vivo studies showed the effectiveness of probiotic administration in the prevention or in the treatment against Salmonella infection. There are several mechanisms by which probiotic strains might exert their effects. They include non immune mechanisms (stabilization of the gut mucosal barrier, competition for adhesion, secretion of antimicrobial substances, etc.) and the modulation of the mucosal and systemic immune responses. These mechanisms are species and/or strain specific. There are also evidences that in some cases, a mix of probiotic strains can be more useful than each strain alone against this infection. In addition, the presence of one or more probiotic strains in a fermented product can improve the beneficial properties of the probiotic strains involved. It was also reviewed the security of probiotics administration after Salmonella infection in healthy host and in immunosuppressed or babies hosts. Although, the major part of the researches were performed in animal models through in vivo assays or by in vitro studies using human cell lines, some studies carried out in humans to verify the probiotic effects were also addressed in the present review. Nevertheless, is of critical importance to perform more clinical trials in humans to validate the results obtained with each specific probiotic strain or probiotic product. [Copyright &y& Elsevier]
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- 2012
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49. Anti-infective mechanisms induced by a probiotic Lactobacillus strain against Salmonella enterica serovar Typhimurium infection
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de Moreno de LeBlanc, Alejandra, Castillo, Natalia A., and Perdigon, Gabriela
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ANTI-infective agents , *LACTOBACILLUS , *FOOD microbiology , *SALMONELLA , *GRAM-negative bacteria , *PROBIOTICS , *CELLULAR immunity , *LABORATORY mice , *MATHEMATICAL models - Abstract
Abstract: The prevention of pathogen infections is one of the most extensively studied effects of probiotics. L. casei CRL 431 is a probiotic bacterium and its effects on the gut immune cells have been extensively studied. The aim of the present study was to determine, using a mouse model, the preventive and therapeutic effect of L. casei CRL 431 to achieve protection against Salmonella enteritidis serovar Typhimurium infection. In both previous and continuous (previous and post-infection) probiotic administration, the mechanisms induced by this lactic acid bacteria on the first line of intestinal defense (non-specific barrier and the innate immune cells associated to the gut), as a way to understand some of the mechanisms involved in the protection against Salmonella enteritidis serovar Typhimurium, were analyzed. The results obtained demonstrated that 7days L. casei CRL 431 administration before infection decreased the severity of the infection with Salmonella enteritidis serovar Typhimurium, demonstrating that the continuous administration (even after infection) had the best effect. This continuous administration diminished the counts of the pathogen in the intestine as well as its spread outside this organ. Several mechanisms and cells are involved in this protective effect against Salmonella enteritidis serovar Typhimurium. L. casei CRL 431 acted on cells of the innate and adaptive immune response. The probiotic administration decreased the neutrophil infiltration with the consequent diminution of intestinal inflammation; activated the macrophage phagocytic activity in different sites such as Peyer''s patches, spleen and peritoneum; and increased the number of IgA+cells in the lamina propria of the small intestine which was correlated with increased release of s-IgA specific against the pathogen in the intestinal fluids. The mechanism of the inhibition of cellular apoptosis was not involved. [Copyright &y& Elsevier]
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- 2010
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50. The Ability of Riboflavin-Overproducing Lactiplantibacillus plantarum Strains to Survive Under Gastrointestinal Conditions
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Rosa Aznar, Alejandra de Moreno de LeBlanc, Annel M. Hernández-Alcántara, Graciela Vignolo, Jean Guy LeBlanc, Sandra Pardo, Mari Luz Mohedano, Paloma López, Ministerio de Ciencia, Innovación y Universidades (España), Programa Iberoamericano de Ciencia y Tecnología para el Desarrollo, European Cooperation in Science and Technology, Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina), Mohedano Bonillo, Mari Luz, Vignolo, Graciela, De Moreno de LeBlanc, A., Leblanc, Jean Guy, Aznar, Rosa, López, Paloma, Mohedano Bonillo, Mari Luz [0000-0001-6748-9443], Vignolo, Graciela [0000-0003-2368-9050], De Moreno de LeBlanc, A. [0000-0003-0352-374X], Leblanc, Jean Guy [0000-0002-4634-8630], Aznar, Rosa [0000-0002-8761-8887], and López, Paloma [0000-0001-8755-8952]
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Microbiology (medical) ,Vitamin ,Protein mCherry ,Lactiplantibacillus plantarum ,Riboflavin ,PROTEIN MCHERRY ,lcsh:QR1-502 ,LACTIPLANTIBACILLUS PLANTARUM ,Microbiology ,RIBOFLAVIN ,lcsh:Microbiology ,law.invention ,03 medical and health sciences ,chemistry.chemical_compound ,Probiotic ,law ,In vivo ,Tolerance to gastrointestinal stress of Lactiplantibacillus ,Food science ,TOLERANCE TO GASTROINTESTINAL STRESS OF LACTIPLANTIBACILLUS ,030304 developmental biology ,purl.org/becyt/ford/2.11 [https] ,2. Zero hunger ,0303 health sciences ,biology ,030306 microbiology ,Biofilm ,Lactic acid bacteria (LAB) ,biology.organism_classification ,3. Good health ,Lactic acid ,chemistry ,purl.org/becyt/ford/2 [https] ,LACTIC ACID BACTERIA (LAB) ,mCherry ,Bacteria - Abstract
17 p.-5 fig.-4 tab.+mat. supl.:5 p.-3 fig.-1 tab., Riboflavin, vitamin B2, is essential for humans and has to be obtained from the diet. Some lactic acid bacteria (LAB) produce this vitamin, and they can be used for in-situ fortification of foods. This could be an alternative to supplementation with chemically synthesized vitamin, to palliate riboflavin deficiencies in specific groups of people. Moreover, if the producing LAB could survive in the gastrointestinal stress (GIT) they could be added as probiotics in this environment. In the present study we tested two riboflavin-overproducing Lactiplantibacillus plantarum strains (M5MA1-B2 and M9MG6-B2), spontaneous mutants of LAB isolated from chicha, a traditional Andean beverage. These two LAB, and also their isogenic strains M5MA1-B2[pRCR12] and M9MG6-B2[pRCR12], expressing the mCherry protein from the pRCR12 plasmid, were evaluated in vitro under simulated GIT conditions. Among other, specifically developed protein fluorescence assays were used. The four LAB showed similar levels of adhesion (>6.0%) to Caco-2 cells, higher than that of the probiotic Lacticaseibacillus rhamnosus GG strain (4.51%). Thus, LAB biofilm formation was assessed in the labeled cells by intracellular mCherry fluorescence and in the unlabeled parental strains by crystal violet staining. Both methods detected the formation of consistent biofilms by the L. plantarum strains. The quantification of mCherry fluorescence was also used to analyze LAB auto-aggregation properties. High levels of auto-aggregation were detected for both M5MA1-B2[pRCR12] and M9MG6-B2[pRCR12]. Survival of LAB included in a commercial cereal-based food matrix (Incaparina) under GIT conditions was also evaluated. The four LAB were resistant in vitro to the stomach and intestinal stresses, and proliferated in this environment, indicating a protective and nutritional effect of the Incaparina on the bacteria. Also, M9MG6-B2 survival in the presence or absence of Incaparina was evaluated in vivo in a BALB/c mouse model. The administration of the M9MG6-B2 strain alone or together with Incaparina had no adverse effect on the health, growth and/or well-being of the rodents. In addition, an increment in the villus length/crypt depth ratio was observed. The overall results obtained indicate that the LAB studied have probiotic characteristics of interest for the development of functional foods., This work was supported by the Spanish Ministry of Science, Innovation and Universities (grants RTI2018-097114-B-I00, PCIN-2017-075, and PCIN-2017-003), the Ibero-American Program of Science and Technology for the Development (CYTED, Strategic Project Ref: 917PTE0537), and the European Cooperation in Science and Technology (SOURDOMICS Cost Action CA1801). JL, GV, and AM acknowledge the CONICET (Argentina) for its financial contributions.
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