21 results on '"Valadez-Vega C"'
Search Results
2. Undernutrition in the parental and first generation provokes an organ-specific response to oxidative stress on neonates of second filial generation of Wistar rats.
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Baños‐Gómez, R., Cruz‐Cansino, N. S., Suarez‐Diéguez, T., Valadez‐Vega, C., Ramírez‐Moreno, E., Alanís‐García, E., Ariza‐Ortega, J. A., Manríquez‐Torres, J. J., Zamora‐Romo, E., and Delgado‐Olivares, L.
- Subjects
MALNUTRITION ,OXIDATIVE stress ,CARBONYLATION ,ANIMAL young ,ANIMAL epigenetics ,ANTIOXIDANTS ,NUTRITION - Abstract
Undernutrition induces an increase of the oxidative stress that can predispose offspring to various diseases in adulthood through epigenetic reprogramming. The aim of this study was to evaluate the effects of intergenerational undernutrition on protein oxidation and antioxidant defence response on liver, heart and brain of the second-generation neonates (F
2 ) of undernourished rats. For this purpose, both parents in parental (F0 ) and first generation (F1 ) were fed with a low-nutrient diet. Body mass and length decreased (p < 0.05) in F0 , F1 and F2 being the F1 males who exhibited a greater mass loss. A decrease in plasma albumin concentration was observed in F2 neonates (p < 0.05) and also a mass loss of liver, heart and brain (p < 0.05), although proportionally to body length reduction. Undernutrition increased levels of protein oxidation in liver and heart (p < 0.05) but not in brain (p > 0.05) while catalase activity increased only in brain (p < 0.05). In summary, intergenerational undernutrition modifies the antioxidant status through an organ-specific response, on F2 neonate rats, where the brain increased catalase activity to prevent a severe oxidative damage and support the vital functions of this key organ to maintain vital functions. [ABSTRACT FROM AUTHOR]- Published
- 2017
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3. A review of Ficus L. genus (Moraceae): a source of bioactive compounds for health and disease. Part 1.
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Madrigal-Santillán E, Portillo-Reyes J, Morales-González JA, Sánchez-Gutiérrez M, Izquierdo-Vega JA, Valadez-Vega C, Álvarez-González I, Chamorro-Cevallos G, Morales-González Á, Garcia-Melo LF, Batina N, Paniagua-Pérez R, and Madrigal-Bujaidar E
- Abstract
The Ficus L. genus, belonging to the Moraceae family, includes around 850 species that are widely distributed in tropical and subtropical regions around the world; including the Eastern Mediterranean, Asia, Africa, Australia, and a large territory of America. Among the most important species are F. deltoidea , F. exasperata , F. sycomorus , F. religiosa , F. microcarpa , F. hirta Vahl, F. benghalensis , F. racemosa , F. elástica , and F. carica . Different parts of Ficus plants (root, stem bark, latex, leaves, pulp and fruits) contain bioactive compounds [flavonoids (flavanols, flavones, flavonols, isoflavones, chalcones, anthocyanins), phenolic acids (hidroxylcinnamic acids, hidroxylbenzoic acids), phytosterols, terpenes (triterpenes, tetraterpenes, diterpenes, sesquiterpenes, monoterpenes), coumarins, hydroxybenzoates, phenylpropanoids, chlorins, pheophytins, megastigmanes, chitinases, organic acids, fatty acids, amino acids, alkaloids, glycosides] which together, are currently useful to more than 30 traditional ethnomedical uses. The present manuscript is the result of scientific search processed with the main electronic databases (PubMEd, SciELO, Latindex, Redalyc, BiologyBrowser, ScienceResearch, ScienceDirect, Academic Journals, Ethnobotany, and Scopus). This first review (Part 1), compiles information from published research (in vitro, in vivo and clinical studies) on its antimicrobial, antifungal, antiviral, anti-helminthic, hypoglycemic, hypolipidemic, hepatoprotective, anti-inflammatory, analgesic, and antipyretic properties; as well as its possible adverse and/or toxicological effects. Given the amount of evidence described in this review it aims to trigger a more detailed scientific research on the important pharmacological properties of all angiosperm plants of the genus Ficus L., Competing Interests: None., (AJTR Copyright © 2024.)
- Published
- 2024
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4. Purification, Structural Characterization, and Bioactivity of Amaranthus hypochondriacus Lectin.
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Resendiz-Otero MF, Bernardino-Nicanor A, Lugo-Magaña O, Betanzos-Cabrera G, González-Cruz L, Morales-González JA, Acosta-García G, Fernández-Martínez E, Salazar-Campos A, and Valadez-Vega C
- Subjects
- Humans, Hydrogen-Ion Concentration, Plant Lectins chemistry, Plant Lectins pharmacology, Plant Lectins isolation & purification, Antioxidants chemistry, Antioxidants pharmacology, Antioxidants isolation & purification, Hemagglutination drug effects, Erythrocytes drug effects, Temperature, Fetuins chemistry, Amaranthus chemistry
- Abstract
Lectin extracted from Amaranthus hypochondriacus was purified using an affinity column with an agarose-fetuin matrix specific to the lectin of interest. Purification was confirmed by SDS-PAGE, revealing a single protein band with a molecular mass of 34.4 kDa. A hemagglutination assay showed that the lectin had a higher affinity for human type A erythrocytes, and its hemagglutinating activity was inhibited only by fetuin, not by mono-, di-, or trisaccharides. This demonstrated the lectin's selectivity for the N-acetylgalactosamine present on the surface of type A erythrocytes and fetuin. Amaranth lectin exhibited antioxidant activity, which was attributed to the phenolic compounds, amino acids, and specific peptides within the protein structure that are known for their antioxidant properties. Infrared (IR) spectroscopy provided a structural analysis and confirmed lectin glycosylation, a crucial factor in its stability and its ability to bind specific glycans on cell surfaces. Cu
2+ , Mn2+ , and Zn2+ ions were found in the lectin, and these ions were strongly bound to the protein, as dialysis against ethylenediaminetetraacetic acid (EDTA) did not remove them. pH and temperature influenced lectin stability, with higher hemagglutinating activity observed at pH 7, and it remained thermostable at 25 °C.- Published
- 2024
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5. Phytochemicals and Their Usefulness in the Maintenance of Health.
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Rodríguez-Negrete EV, Morales-González Á, Madrigal-Santillán EO, Sánchez-Reyes K, Álvarez-González I, Madrigal-Bujaidar E, Valadez-Vega C, Chamorro-Cevallos G, Garcia-Melo LF, and Morales-González JA
- Abstract
Inflammation is the immune system's first biological response to infection, injury, or irritation. Evidence suggests that the anti-inflammatory effect is mediated by the regulation of various inflammatory cytokines, such as nitric oxide, interleukins, tumor necrosis factor alpha-α, interferon gamma-γ, as well as the non-cytokine mediator, prostaglandin E2. Currently, the mechanism of action and clinical usefulness of phytochemicals is known; their action on the activity of cytokines, free radicals, and oxidative stress. The latter are of great relevance in the development of diseases, such that the evidence collected demonstrates the beneficial effects of phytochemicals in maintaining health. Epidemiological evidence indicates that regular consumption of fruits and vegetables is related to a low risk of developing cancer and other chronic diseases.
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- 2024
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6. Antioxidant Activity and Anticarcinogenic Effect of Extracts from Bouvardia ternifolia (Cav.) Schltdl.
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Valadez-Vega C, Lugo-Magaña O, Mendoza-Guzmán L, Villagómez-Ibarra JR, Velasco-Azorsa R, Bautista M, Betanzos-Cabrera G, Morales-González JA, and Madrigal-Santillán EO
- Abstract
According to the available ethnobotanical data, the Bouvardia ternifolia plant has long been used in Mexican traditional medicine to relieve the symptoms of inflammation. In the present study, the cytotoxic effect of extracts obtained from the flowers, leaves and stems of B. ternifolia using hexane, ethyl acetate (AcOEt) and methanol (MeOH) was evaluated by applying them to the SiHa and MDA-MB-231 cancer cell lines. An MTT reduction assay was carried out along with = biological activity assessments, and the content of total phenols, tannins, anthocyanins, betalains and saponins was quantified. According to the obtained results, nine extracts exhibited a cytotoxic effect against both the SiHa and MDA lines. The highest cytotoxicity was measured for leaves treated with the AcOEt (ID
50 of 75 µg/mL was obtained for MDA and 58.75 µg/mL for SiHa) as well as inhibition on ABTS•+ against DPPH• radical, while MeOH treatment of stems and AcOEt of flowers yielded the most significant antioxidant capacity (90.29% and 90.11% ABTS•+ radical trapping). Moreover, the highest phenolic compound content was measured in the stems (134.971 ± 0.294 mg EAG/g), while tannins were more abundant in the leaves (257.646 mg eq cat/g) and saponins were most prevalent in the flowers (20 ± 0 HU/mg). Screening tests indicated the presence of flavonoids, steroids, terpenes and coumarins, as well as ursolic acid, in all the studied extracts. These results demonstrate the biological potential of B. ternifolia.- Published
- 2023
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7. Partial Characterization of Lectins Purified from the Surco and Vara (Furrow and Rod) Varieties of Black Phaseolus vulgaris .
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Valadez-Vega C, Lugo-Magaña O, Betanzos-Cabrera G, and Villagómez-Ibarra JR
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- Humans, Rabbits, Swine, Animals, Lectins chemistry, Seeds chemistry, Chromatography, Affinity, Erythrocytes metabolism, Glycoproteins analysis, Plant Lectins pharmacology, Phaseolus chemistry
- Abstract
As they manifest specifically and reversibly, lectins are proteins or glycoproteins with the characteristic of agglutinating erythrocytes. Given that grain legume lectins can represent 10% of protein content and can have various biological functions, they are extensively studied. The objective of this work was to purify and partially characterize the lectins of Phaseolus vulgaris black, var surco and vara (LBBS and LBBV). Both lectin types were purified by affinity chromatography on stroma matrix, which agglutinated human erythrocytes type A, B, and O, as well as rabbit, hamster, pig, and chicken erythrocytes. Native-PAGE was employed for molecular mass determination, yielding 109.36 and 112.68 kDa for BBS and BBV, respectively. Further analyses revealed that these lectins are tetrameric glycoproteins that require Ca
+2 , Mn+2 and Mg+2 ions for exhibiting their hemagglutinating function, which can be inhibited by fetuin. Moreover, optimal pH was established for both lectins (10.5 for LBBS and 7-9 for LBBV), while their activity was temperature-dependent and ceased above 70 °C. Finally, the observed differences in the biochemical characteristics and bioactive functions were ascribed to the different physiological characteristics of each seed, as well as the protein itself.- Published
- 2022
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8. Bauhinia forficata Link, Antioxidant, Genoprotective, and Hypoglycemic Activity in a Murine Model.
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Chávez-Bustos EA, Morales-González A, Anguiano-Robledo L, Madrigal-Santillán EO, Valadez-Vega C, Lugo-Magaña O, Mendoza-Pérez JA, and Fregoso-Aguilar TA
- Abstract
Bauhinia forficata L. is a tree used in alternative medicine as an anti-diabetic agent, with little scientific information about its pharmacological properties. The hypoglycemic, antioxidant, and genoprotective activities of a methanolic extract of B . forficata leaves and stems combined were investigated in mice treated with streptozotocin (STZ). Secondary metabolites were determined by qualitative phytochemistry. In vitro antioxidant activity was determined by the DPPH method at four concentrations of the extract. The genoprotective activity was evaluated in 3 groups of mice: control, anthracene (10 mg/kg), and anthracene + B. forficata (500 mg/kg) and the presence of micronuclei in peripheral blood was measured for 2 weeks. To determine the hypoglycemic activity, the crude extract was prepared in a suspension and administered (500 mg/kg, i.g.) in previously diabetic mice with STZ (120 mg/kg, i.p.), measuring blood glucose levels every week as well as the animals' body weight for six weeks. The extract showed good antioxidant activity and caused a decrease in the number of micronuclei. The diabetic mice + B . forficata presented hypoglycemic effects in the third week of treatment, perhaps due to its secondary metabolites. Therefore, B. forficata is a candidate for continued use at the ethnomedical level as an adjuvant to allopathic therapy., Competing Interests: The authors declare no conflicts of interest.
- Published
- 2022
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9. Effects of Germination and Popping on the Anti-Nutritional Compounds and the Digestibility of Amaranthus hypochondriacus Seeds.
- Author
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Valadez-Vega C, Lugo-Magaña O, Figueroa-Hernández C, Bautista M, Betanzos-Cabrera G, Bernardino-Nicanor A, González-Amaro RM, Alonso-Villegas R, Morales-González JA, and González-Cruz L
- Abstract
Amaranth seeds, although a valuable food in Mexico, contain anti-nutritional compounds that can affect food quality. As a part of this work, the proximate composition, fatty acid profile, protein digestibility, and the effect of germination and popping of Amaranthus hypochondriacus seeds was analyzed with the aim of eliminating anti-nutritional compounds. Untreated seeds comprised of 11.35-18.8% protein and 0.27-13.39% lipids, including omega 3, 6, and 9 fatty acids such as oleic, linoleic, linolenic, and arachidonic acid. The main minerals detected were Ca
+2 , K+1 , and Mg+2 . Nevertheless in vitro studies indicate that germination significantly improved digestibility, whereby treatments aimed at reducing anti-nutritional compounds decreased lectin concentration, while significantly increasing tannins and completely eliminating trypsins and saponins.- Published
- 2022
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10. Potential Mechanisms of the Improvement of Glucose Homeostasis in Type 2 Diabetes by Pomegranate Juice.
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Olvera-Sandoval C, Fabela-Illescas HE, Fernández-Martínez E, Ortiz-Rodríguez MA, Cariño-Cortés R, Ariza-Ortega JA, Hernández-González JC, Olivo D, Valadez-Vega C, Belefant-Miller H, and Betanzos-Cabrera G
- Abstract
Pomegranate is a polyphenol-rich fruit. Studies have shown that extracts prepared from its juice or from different parts of the pomegranate plant have various biological activities including antioxidant, antimicrobial, anti-inflammatory, anticarcinogenic, cardioprotective, and antidiabetic. The therapeutic potential has been attributed to various phytochemicals, including ellagic acid, punicic acid, flavonoids, anthocyanidins, anthocyanins, flavonols, and flavones. This review focuses on the scientific evidence of pomegranate juice as hypoglycemic, emphasizing the chemical composition and the possible mechanisms of action associated with this effect. Studies were identified using the PubMed, Scopus, and ISI Web of Science databases to identify relevant articles focused on the hypoglycemic effect of pomegranate juice. The physiological responses to pomegranate juice are reported here, including a decrease of oxidative stress damage, an increase of insulin-dependent glucose uptake, maintenance of β-cell integrity, inhibition of nonenzymatic protein glycation, an increase of insulin sensitivity, modulation of peroxisome proliferator-activated receptor-gamma, inhibition of α-amylase, inhibition of α-glucosidase and dipeptidyl peptidase-4, and decreases in inflammation. Overall, we found a significant hypoglycemic effect of pomegranate in in vitro and in vivo studies and we summarize the potential mechanisms of action.
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- 2022
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11. Effect of Extract and Ellagic Acid from Geranium schiedeanum on the Antioxidant Defense System in An Induced-Necrosis Model.
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Vargas-Mendoza N, Vázquez-Velasco M, González-Torres L, Benedí J, Sánchez-Muniz FJ, Morales-González JA, Jaramillo-Morales OA, Valadez-Vega C, and Bautista M
- Abstract
Geranium schiedeanum has been used in traditional therapies as an antiseptic, antipyretic, and as analgesic. The present study was designed to evaluate the pretreatment with G. schiedeanum total extract (GS) and its active metabolites on stimulating the endogenous antioxidant defense system (EADS): catalase (Cat), superoxide dismutase (SOD), glutathione peroxidase (GPx), glutathione reductase (GR), and glutathione reduction index (RI GSH/GSSG) in rat liver treated with a sublethal dose (6.6 mmol/Kg) of thioacetamide (TAA) in order to probe the capacity of GS and the active compounds to reduce liver injury. This was assessed by measuring aspartate aminotransferase (AST), alanine aminotransferase (ALT), and total bilirubin (BILT) in rats pretreated or not with TAA, and pretreated or not with GS and its metabolites. The results showed that GS was able to induce the production of EADS enzymes, increasing redox index GSH/GSSG at 24 and 48 h after intoxication, and both the extract and the ellagic acid exhibited a significant reduction of hepatic damage markers. Our data confirmed the hepatoprotective effect of GS and its metabolites, like ellagic acid, support the possible use of this extract in the treatment of liver injury.
- Published
- 2018
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12. Effects of Heliopsis longipes ethanolic extract on mouse spermatozoa in vitro.
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Martinez-Loredo E, Izquierdo-Vega JA, Cariño-Cortes R, Cilia-López VG, Madrigal-Santillán EO, Zuñiga-Pérez C, Valadez-Vega C, Moreno E, and Sánchez-Gutiérrez M
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- Animals, Cell Membrane drug effects, Cell Survival drug effects, Dose-Response Relationship, Drug, In Vitro Techniques, Lipid Peroxidation drug effects, Male, Mice, Plant Extracts isolation & purification, Plant Roots chemistry, Spermatocidal Agents isolation & purification, Spermatozoa metabolism, Thiobarbituric Acid Reactive Substances metabolism, Asteraceae chemistry, Ethanol chemistry, Plant Extracts pharmacology, Sperm Motility drug effects, Spermatocidal Agents pharmacology, Spermatozoa drug effects
- Abstract
Context: Heliopsis longipes (A. Gray) Blake (Asteraceae), a plant native to Mexico, is used in traditional medicine as analgesic and microbicide. The main component in the H. longipes ethanolic extract (HLEE) is affinin, as determined by HPLC/UV-visible and NMR measurement. To date, there is no documented evidence on the spermicidal activity of this extract., Objective: The objective of this study was to assess in vitro the effectiveness of HLEE as spermicide., Materials and Methods: The spermicidal activity of HLEE was evaluated by the Sander-Cramer assay. Spermatozoa were incubated for 20 s with HLEE in concentrations ranging from 75 to 2000 µg/mL to determine the minimum effective concentration (MEC) value. The 50% effective concentration (EC50) of HLEE was estimated by assaying serial dilutions from the MEC. Additionally, sperms were incubated with 125, 250, or 500 µg/mL of HLEE to evaluate the viability and the integrity of sperm membrane. Lipid peroxidation was assessed by the thiobarbituric acid reactive substances assay., Results: HLEE caused an inhibition of 100% in spermatozoa motility at a MEC value of 2000 µg/mL; the EC50 value was 125 µg/mL. Additionally, exposure to HLEE at 125, 250, or 500 µg/mL for 30 min decreased sperm viability to 27%, 8%, and 2% of the control value, respectively, and significantly increased the percentage of sperms with structurally disorganized membrane. HLEE also increased significantly the level of lipid peroxidation in sperms with respect to controls., Discussion and Conclusion: The results demonstrate the spermicidal activity of HLEE in vitro and suggest that this action is caused by oxidative damage and alterations in the spermatozoal membrane.
- Published
- 2016
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13. Cytotoxic and antiproliferative effect of tepary bean lectins on C33-A, MCF-7, SKNSH, and SW480 cell lines.
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Valadez-Vega C, Morales-González JA, Sumaya-Martínez MT, Delgado-Olivares L, Cruz-Castañeda A, Bautista M, Sánchez-Gutiérrez M, and Zuñiga-Pérez C
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- Antineoplastic Agents, Phytogenic isolation & purification, Antineoplastic Agents, Phytogenic toxicity, Cell Line, Tumor, Cell Proliferation drug effects, Dose-Response Relationship, Drug, Humans, Plant Lectins isolation & purification, Plant Lectins toxicity, Time Factors, Antineoplastic Agents, Phytogenic pharmacology, Phaseolus chemistry, Plant Lectins pharmacology
- Abstract
For many years, several studies have been employing lectin from vegetables in order to prove its toxic effect on various cell lines. In this work, we analyzed the cytotoxic, antiproliferative, and post-incubatory effect of pure tepary bean lectins on four lines of malignant cells: C33-A; MCF-7; SKNSH, and SW480. The tests were carried out employing MTT and 3[H]-thymidine assays. The results showed that after 24 h of lectin exposure, the cells lines showed a dose-dependent cytotoxic effect, the effect being higher on MCF-7, while C33-A showed the highest resistance. Cell proliferation studies showed that the toxic effect induced by lectins is higher even when lectins are removed, and in fact, the inhibition of proliferation continues after 48 h. Due to the use of two techniques to analyze the cytotoxic and antiproliferative effect, differences were observed in the results, which can be explained by the fact that one technique is based on metabolic reactions, while the other is based on the 3[H]-thymidine incorporated in DNA by cells under division. These results allow concluding that lectins exert a cytotoxic effect after 24 h of exposure, exhibiting a dose-dependent effect. In some cases, the cytotoxic effect is higher even when the lectins are eliminated, however, in other cases, the cells showed a proliferative effect.
- Published
- 2014
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14. Investigation on the protective effects of cranberry against the DNA damage induced by benzo[a]pyrene.
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Madrigal-Santillán E, Fragoso-Antonio S, Valadez-Vega C, Solano-Solano G, Pérez CZ, Sánchez-Gutiérrez M, Izquierdo-Vega JA, Gutiérrez-Salinas J, Esquivel-Soto J, Esquivel-Chirino C, Sumaya-Martínez T, Fregoso-Aguilar T, Mendoza-Pérez J, and Morales-González JA
- Subjects
- Animals, Antioxidants pharmacology, Dose-Response Relationship, Drug, Male, Mice, Micronuclei, Chromosome-Defective chemically induced, Micronuclei, Chromosome-Defective drug effects, Micronucleus Tests, Benzo(a)pyrene toxicity, DNA Damage drug effects, Plant Extracts pharmacology, Vaccinium macrocarpon chemistry
- Abstract
There are few reports that demonstrate the antigenotoxic potential of cranberries. Although the types of berry fruits consumed worldwide are many, this paper focuses on cranberries that are commonly consumed in Mexico (Vaccinium macrocarpon species). The purpose of the present study is to determine whether cranberry ethanolic extract (CEE) can prevent the DNA damage produced by benzo[a]pyrene (B[a]P) using an in vivo mouse peripheral blood micronucleus assay. The experimental groups were organized as follows: a negative control group (without treatment), a positive group treated with B[a]P (200 mg/kg), a group administered with 800 mg/kg of CEE, and three groups treated with B[a]P and CEE (200, 400, and 800 mg/kg) respectively. The CEE and benzo[a]pyrene were administered orally for a week, on a daily basis. During this period the body weight, the feed intake, and the determination of antigenotoxic potential were quantified. At the end of this period, we continued with the same determinations for one week more (recovery period) but anymore administration of the substances. The animals treated with B[a]P showed a weight increase after the first week of administration. The same phenomenon was observed in the lots combined with B[a]P and CEE (low and medium doses). The dose of 800 mg/kg of CEE showed similar values to the control group at the end of the treatment period. In the second part of the assay, when the substances were not administered, these experimental groups regained their normal weight. The dose of CEE (800 mg/kg) was not genotoxic nor cytotoxic. On the contrary, the B[a]P increases the frequency of micronucleated normochromatic erythrocytes (MNNE) and reduces the rate of polychromatic erythrocytes (PE) at the end of the treatment period. With respect to the combined lots, a significant decrease in the MN rate was observed from the sixth to the eighth day of treatment with the two high doses applied; the highest protection (60%) was obtained with 800 mg/kg of CEE. The same dose showed an anticytotoxic effect which corresponded to an improvement of 62.5% in relation to the animals administered with the B[a]P. In the second period, all groups reached values that have been seen in the control group animals. Our results suggest that the inhibition of clastogenicity of the cranberry ethanolic extract against B[a]P is related to the antioxidant capacity of the combination of phytochemicals present in its chemical composition.
- Published
- 2012
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15. Role of Kupffer cells in thioacetamide-induced cell cycle dysfunction.
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Bautista M, Andres D, Cascales M, Morales-González JA, Sánchez-Reus MI, Madrigal-Santillán E, Valadez-Vega C, Fregoso-Aguilar T, Mendoza-Pérez JA, Gutiérrez-Salinas J, and Esquivel-Soto J
- Subjects
- Animals, Cell Cycle Checkpoints, Cell Proliferation drug effects, Chemical and Drug Induced Liver Injury pathology, Chemical and Drug Induced Liver Injury physiopathology, Cyclin D blood, Cyclin E blood, Liver drug effects, Liver metabolism, Liver pathology, Male, Necrosis drug therapy, Proliferating Cell Nuclear Antigen blood, Proliferating Cell Nuclear Antigen metabolism, Rats, Rats, Wistar, Thioacetamide toxicity, Cell Cycle drug effects, Chemical and Drug Induced Liver Injury drug therapy, Gadolinium pharmacology, Kupffer Cells drug effects, Kupffer Cells metabolism, Liver Regeneration drug effects
- Abstract
It is well known that gadolinium chloride (GD) attenuates drug-induced hepatotoxicity by selectively inactivating Kupffer cells. In the present study the effect of GD in reference to cell cycle and postnecrotic liver regeneration induced by thioacetamide (TA) in rats was studied. Two months male rats, intraveously pretreated with a single dose of GD (0.1 mmol/Kg), were intraperitoneally injected with TA (6.6 mmol/Kg). Samples of blood and liver were obtained from rats at 0, 12, 24, 48, 72 and 96 h following TA intoxication. Parameters related to liver damage were determined in blood. In order to evaluate the mechanisms involved in the post-necrotic regenerative state, the levels of cyclin D and cyclin E as well as protein p27 and Proliferating Cell Nuclear Antigen (PCNA) were determined in liver extracts because of their roles in the control of cell cycle check-points. The results showed that GD significantly reduced the extent of necrosis. Noticeable changes were detected in the levels of cyclin D1, cyclin E, p27 and PCNA when compared to those induced by thioacetamide. Thus GD pre-treatment reduced TA-induced liver injury and accelerated the postnecrotic liver regeneration. These results demonstrate that Kupffer cells are involved in TA-induced liver and also in the postnecrotic proliferative liver states.
- Published
- 2011
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16. Purification, biochemical characterization, and bioactive properties of a lectin purified from the seeds of white tepary bean (phaseolus acutifolius variety latifolius).
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Valadez-Vega C, Guzmán-Partida AM, Soto-Cordova FJ, Alvarez-Manilla G, Morales-González JA, Madrigal-Santillán E, Villagómez-Ibarra JR, Zúñiga-Pérez C, Gutiérrez-Salinas J, and Becerril-Flores MA
- Subjects
- Chromatography, Affinity, Electrophoresis, Polyacrylamide Gel, Phaseolus embryology, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, Lectins isolation & purification, Phaseolus chemistry, Seeds chemistry
- Abstract
The present work shows the characterization of Phaseolus acutifolius variety latifolius, on which little research has been published, and provides detailed information on the corresponding lectin. This protein was purified from a semi-domesticated line of white tepary beans from Sonora, Mexico, by precipitation of the aqueous extract with ammonium sulfate, followed by affinity chromatography on an immobilized fetuin matrix. MALDI TOF analysis of Phaseolus acutifolius agglutinin (PAA) showed that this lectin is composed of monomers with molecular weights ranging between 28 and 31 kDa. At high salt concentrations, PAA forms a dimer of 63 kDa, but at low salt concentrations, the subunits form a tetramer. Analysis of PAA on 2D-PAGE showed that there are mainly three types of subunits with isoelectric points of 4.2, 4.4, and 4.5. The partial sequence obtained by LC/MS/MS of tryptic fragments from the PAA subunits showed 90-100% identity with subunits from genus Phaseolus lectins in previous reports. The tepary bean lectin showed lower hemagglutination activity than Phaseolus vulgaris hemagglutinin (PHA-E) toward trypsinized human A and O type erythrocytes. The hemagglutination activity was inhibited by N-glycans from glycoproteins. Affinity chromatography with the immobilized PAA showed a high affinity to glycopeptides from thyroglobulin, which also has N-glycans with a high content of N-acetylglucosamine. PAA showed less mitogenic activity toward human lymphocytes than PHA-L and Con A. The cytotoxicity of PAA was determined by employing three clones of the 3T3 cell line, demonstrating variability among the clones as follows: T4 (DI₅₀ 51.5 µg/mL); J20 (DI₅₀ 275 µg/mL), and N5 (DI₅₀ 72.5 µg/mL).
- Published
- 2011
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17. Detection of cytotoxic activity of lectin on human colon adenocarcinoma (Sw480) and epithelial cervical carcinoma (C33-A).
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Valadez-Vega C, Alvarez-Manilla G, Riverón-Negrete L, García-Carrancá A, Morales-González JA, Zuñiga-Pérez C, Madrigal-Santillán E, Esquivel-Soto J, Esquivel-Chirino C, Villagómez-Ibarra R, Bautista M, and Morales-González A
- Subjects
- Cell Proliferation drug effects, Drug Screening Assays, Antitumor, Electrophoresis, Polyacrylamide Gel, Female, Humans, Adenocarcinoma pathology, Colonic Neoplasms pathology, Lectins pharmacology, Neoplasms, Glandular and Epithelial pathology, Uterine Cervical Neoplasms pathology
- Abstract
Lectins comprise a heterogeneous class of proteins that recognize the carbohydrate moieties of glycoconjugates with high specificity. Numerous studies have shown that lectins are capable of recognizing specific carbohydrate moieties displayed by malignant cells or tissues. The present work was performed to investigate the effects of tepary bean (Phaseolus acutifolius) lectins on proliferation, colony formation, and alteration of DNA synthesis of human malignant cells. Tepary bean lectin showed dose dependent effects on the inhibition of viability as well as on colony formation in two human malignant cells lines (C33-A, Sw480); By contrast, tepary bean lectin only showed significant effects on DNA synthesis on Sw480 cells. Our results provide evidence of the anti- proliferative and cytotoxic effects of the tepary bean lectins on C33-A and Sw480 cells lines.
- Published
- 2011
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18. Betalain, Acid ascorbic, phenolic contents and antioxidant properties of purple, red, yellow and white cactus pears.
- Author
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Sumaya-Martínez MT, Cruz-Jaime S, Madrigal-Santillán E, García-Paredes JD, Cariño-Cortés R, Cruz-Cansino N, Valadez-Vega C, Martinez-Cardenas L, and Alanís-García E
- Subjects
- Antioxidants isolation & purification, Ascorbic Acid isolation & purification, Betalains isolation & purification, Cactaceae metabolism, Hydroxyl Radical chemistry, Oxidation-Reduction, Phenols isolation & purification, Antioxidants chemistry, Ascorbic Acid chemistry, Betalains chemistry, Cactaceae chemistry, Phenols chemistry
- Abstract
Commercialization of cactus pears based on their antioxidant properties can generate competitive advantages, and these can turn into business opportunities and the development of new products and a high-value ingredient for the food industry. This work evaluated the antioxidant activities (1,1-diphenyl-2-picrylhydrazyl radical-scavenging, protection against oxidation of a β-carotene-linoleic acid emulsion, and iron (II) chelation), the content of total phenolic compounds, ascorbic acid, betacyanin, betaxanthin and the stability of betacyanin pigments in presence of Cu (II)-dependent hydroxyl radicals (OH•), in 18 cultivars of purple, red, yellow and white cactus pear from six Mexican states. Our results indicated that the antiradical activities from yellow and white cactus pear cultivars were not significantly different (p < 0.05) and were lower than the average antiradical activities in red and purple cultivars. The red cactus pear from the state of Zacatecas showed the highest antioxidant activity. The free radical scavenging activity for red cactus pears was significantly correlated (p < 0.05) to the concentration of total phenolic compounds (R(2) = 0.90) and ascorbic acid (R(2) = 0.86). All 18 cultivars of cactus pears studied showed significant chelating activity of ferrous ions. The red and purple cactus pears showed a great stability when exposed to OH•.
- Published
- 2011
- Full Text
- View/download PDF
19. Inflammation, oxidative stress, and obesity.
- Author
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Fernández-Sánchez A, Madrigal-Santillán E, Bautista M, Esquivel-Soto J, Morales-González A, Esquivel-Chirino C, Durante-Montiel I, Sánchez-Rivera G, Valadez-Vega C, and Morales-González JA
- Subjects
- Adipokines metabolism, Adiposity, Catalase metabolism, Endothelium metabolism, Endothelium physiopathology, Glutathione Peroxidase metabolism, Homeostasis, Humans, Inflammation etiology, Nitric Oxide metabolism, Obesity metabolism, Reactive Oxygen Species, Superoxide Dismutase metabolism, Obesity pathology, Oxidative Stress
- Abstract
Obesity is a chronic disease of multifactorial origin and can be defined as an increase in the accumulation of body fat. Adipose tissue is not only a triglyceride storage organ, but studies have shown the role of white adipose tissue as a producer of certain bioactive substances called adipokines. Among adipokines, we find some inflammatory functions, such as Interleukin-6 (IL-6); other adipokines entail the functions of regulating food intake, therefore exerting a direct effect on weight control. This is the case of leptin, which acts on the limbic system by stimulating dopamine uptake, creating a feeling of fullness. However, these adipokines induce the production of reactive oxygen species (ROS), generating a process known as oxidative stress (OS). Because adipose tissue is the organ that secretes adipokines and these in turn generate ROS, adipose tissue is considered an independent factor for the generation of systemic OS. There are several mechanisms by which obesity produces OS. The first of these is the mitochondrial and peroxisomal oxidation of fatty acids, which can produce ROS in oxidation reactions, while another mechanism is over-consumption of oxygen, which generates free radicals in the mitochondrial respiratory chain that is found coupled with oxidative phosphorylation in mitochondria. Lipid-rich diets are also capable of generating ROS because they can alter oxygen metabolism. Upon the increase of adipose tissue, the activity of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx), was found to be significantly diminished. Finally, high ROS production and the decrease in antioxidant capacity leads to various abnormalities, among which we find endothelial dysfunction, which is characterized by a reduction in the bioavailability of vasodilators, particularly nitric oxide (NO), and an increase in endothelium-derived contractile factors, favoring atherosclerotic disease.
- Published
- 2011
- Full Text
- View/download PDF
20. Lead, cadmium and cobalt (Pb, Cd, and Co) leaching of glass-clay containers by pH effect of food.
- Author
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Valadez-Vega C, Zúñiga-Pérez C, Quintanar-Gómez S, Morales-González JA, Madrigal-Santillán E, Villagómez-Ibarra JR, Sumaya-Martínez MT, and García-Paredes JD
- Subjects
- Aluminum Silicates chemistry, Clay, Food Analysis, Glass chemistry, Hydrogen-Ion Concentration, Cadmium analysis, Chromatography, Gas, Cobalt analysis, Lead analysis, Product Packaging instrumentation
- Abstract
Recent studies have shown that handcrafted glass-clay containers are a health risk because they can be contaminated by heavy metals, which can be transferred to food, thus reaching the human body to potentially cause illness. Therefore, in the present work, we evaluate the leaching of lead, cadmium, and cobalt from glass-clay containers into two types of food: tomato sauce (salsa), and chickpea puree. The containers were obtained from four regions in the Mexican state of Hidalgo. Repetitive extractions from the containers were carried out to quantify the leaching of the heavy metals into the salsa, the chickpea puree, and acetic acid using the technique proposed by the USFDA. The results show that greater use of the containers leads to more leaching of heavy metals into both types of food and into the acetic acid, with the greatest metal extraction recorded for the Ixmiquilpan vessels. These results indicate that the metals present in the glass-clay containers leach into the food and that increased reuse increases the risk to the people who use them in food preparation.
- Published
- 2011
- Full Text
- View/download PDF
21. Exposure to sodium fluoride produces signs of apoptosis in rat leukocytes.
- Author
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Gutiérrez-Salinas J, Morales-González JA, Madrigal-Santillán E, Esquivel-Soto J, Esquivel-Chirino C, González-Rubio MG, Suástegui-Domínguez S, and Valadez-Vega C
- Subjects
- Animals, Apoptosis Regulatory Proteins genetics, Apoptosis Regulatory Proteins metabolism, Leukocytes metabolism, Male, Rats, Rats, Wistar, Apoptosis, Leukocytes drug effects, Sodium Fluoride pharmacology
- Abstract
Fluoride is naturally present in the earth's crust and can be found in rocks, coal, and clay; thus, it can be found in small quantities in water, air, plants, and animals. Therefore, humans are exposed to fluoride through food, drinking water, and in the air they breathe. Flouride is essential to maintain bone strength and to protect against dental decay, but if it is absorbed too frequently, it can cause tooth decay, osteoporosis, and damage to kidneys, bones, nerves, and muscles. Therefore, the present work was aimed at determining the effect of intake of sodium fluoride (NaF) as an apoptosis inducer in leukocytes of rats treated for eight weeks with 1 or 50 parts per million (ppm) NaF. Expression of p53, bcl-2, and caspade-3 were used as apoptotic and general metabolism indicators of leukocyte-like indicators of the (INT) oxidation system. Male rats were exposed to NaF (1 and 500 ppm) for eight weeks, and then sacrificed weekly to obtain blood samples. Expression of p53, bcl-2, and caspase-3 were determined in leukocytes by Western blot, and general metabolism of leukocytes was analyzed with a commercial kit. We found changes in the expression of the proteins described, especially when the animals received 50 ppm of NaF. These results indicate that NaF intoxication can be an apoptosis inducer in rat leukocytes treated with the compound for eight weeks.
- Published
- 2010
- Full Text
- View/download PDF
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