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Effects of milk fermented by Lactobacillus helveticus R389 on a murine breast cancer model
- Source :
- Breast Cancer Research, CONICET Digital (CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas, instacron:CONICET
- Publication Year :
- 2005
- Publisher :
- BioMed Central, 2005.
-
Abstract
- INTRODUCTION: Antitumour activity is one of the health-promoting effects attributed to the lactic acid bacteria and their products of fermentation. Previous studies in mice demonstrated that bioactive compounds released in milk fermented by Lactobacillus helveticus R389 contribute to its immunoenhancing and antitumour properties. The aim of the present work was to study the effects of the consumption of milk fermented by L. helveticus R389 or its proteolytic-deficient variant, L. helveticus L89, on a murine hormone-dependent breast cancer model. METHODS: Mice were fed with milk fermented by L. helveticus R389 or L. helveticus L89, during 2 or 7 days. The tumour control group received no special feeding. At the end of the feeding period, the mice were challenged by a subcutaneous injection of tumour cells in the mammary gland. Four days post-injection, the mice received fermented milk on a cyclical basis. The rate of tumour development and the cytokines in serum, mammary gland tissue and tumour-isolated cells were monitored. Bcl-2-positive cells in mammary glands and cellular apoptosis in tumour tissue were also studied. RESULTS: Seven days of cyclical administration of milk fermented by either bacterial strain delayed or stopped the tumour development. Cytokines demonstrated that L. helveticus R389 modulated the immune response challenged by the tumour. IL-10 and IL-4 were increased in all the samples from this group. In comparison with the tumour control, all test groups showed a decrease of IL-6, a cytokine involved in oestrogen synthesis. Seven days of cyclical feeding with milk fermented by L. helveticus R389 produced an increase in the number of apoptotic cells, compared with all other groups. CONCLUSION: This study demonstrated that 7 days of cyclical administration of milk fermented by both strains of L. helveticus diminishes tumour growth, stimulating an antitumour immune response. Compounds released during milk fermentation with L. helveticus R389 would be implicated in its immunoregulatory capacity on the immune response in mammary glands and tumour, which were correlated with the cytokines found at the systemic level. The milk fermented by L. helveticus R389 was able to modulate the relationship between immune and endocrine systems (by IL-6 diminution), which is very important in oestrogen-dependent tumour and induced cellular apoptosis. 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. Université de Moncton; Canadá Fil: Matar, Chantal. Université de Moncton; Canadá Fil: LeBlanc, Nicole. Université de Moncton; Canadá 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
- Subjects :
- CIENCIAS MÉDICAS Y DE LA SALUD
medicine.medical_treatment
Mammary gland
Inmunología
Breast Neoplasms
Mammary Neoplasms, Animal
Biology
Pharmacology
03 medical and health sciences
chemistry.chemical_compound
Subcutaneous injection
Mice
0302 clinical medicine
Immune system
BREAST CANCER
LACTIC ACID BACTERIA
medicine
Endocrine system
Animals
030304 developmental biology
Medicine(all)
0303 health sciences
Mice, Inbred BALB C
Lactobacillus helveticus
food and beverages
purl.org/becyt/ford/3.1 [https]
Neoplasms, Experimental
FERMENTED MILK
biology.organism_classification
3. Good health
Lactic acid
Medicina Básica
medicine.anatomical_structure
Cytokine
Milk
chemistry
Apoptosis
030220 oncology & carcinogenesis
Immunology
Fermentation
purl.org/becyt/ford/3 [https]
Female
IMMUNE SYSTEM
Research Article
Subjects
Details
- Language :
- English
- ISSN :
- 1465542X and 14655411
- Volume :
- 7
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Breast Cancer Research
- Accession number :
- edsair.doi.dedup.....67b970abfe15ae3e9eeffec720790ec9