Abstract:
BACKGROUND:Aronia melanocarpa (Michx.) Elliot fruits are very rich in polyphenols - procyanidins, flavonoids, and phenolic acids. OBJECTIVE:On rat hepatocytes, isolated by two-stepped collagenase perfusion, we investigated the effect of A. melanocarpa fruit juice (AMFJ) in two models of liver toxicity caused by (i) metabolic bioactivation of carbon tetrachloride (CCl4), and (ii) tert-butyl hydroperoxide (t-BuOOH)-induced oxidative stress. MATERIALS AND METHODS:Isolated rat hepatocytes are a suitable model for hepatotoxicity studies. We determined the main parameters of the functional and metabolic status of rat hepatocytes: Cell viability (measured by trypan blue exclusion) and the levels of lactate dehydrogenase (LDH), reduced glutathione (GSH), and malondialdehyde (MDA). These parameters were used to investigate the protective effects of AMFJ in the two toxicity models. The effects of AMFJ were compared with those of silymarin. The cells were treated either with AMFJ or silymarin at increasing concentrations of 5 μg/ml, 10 μg/ml, 30 μg/ml, 50 μg/ml, and 100 μg/ml which were used for measuring of IC50. RESULTS:In both toxicity models - CCl4 and t-BuOOH, AMFJ showed statistically significant cytoprotective and antioxidant activities. AMFJ prevented the loss of cell viability and GSH depletion, decreased LDH leakage and MDA production. The effects of AMFJ at the concentrations of 5, 10, 30, and 50 μg/ml were similar to those of the same concentrations of silymarin, while the effect of the highest AMFJ concentration of 100 μg/ml was higher than that of the same silymarin concentration. The effects were concentration-dependent and more prominent in the t-BuOOH model, compared to those in the CCl4 model. CONCLUSION:The cytoprotective and antioxidant effects of AMFJ established in this study might be due to its polyphenolic ingredients, which could influence the cytochrome P450-mediated metabolism of the experimental hepatotoxic substances (CCl4 and t-BuOOH) and could act as free radical scavengers. The stronger effects of the highest AMFJ concentration in comparison with that of silymarin were possibly due to the combined presence of different polyphenols in the juice. SUMMARY:On rat hepatocytes, isolated by two-stepped collagenase perfusion, we investigated the effect of Aronia melanocarpa fruit juice (AMFJ) in two models of liver toxicity caused by i) metabolic bioactivation of carbon tetrachloride (CCl4), and ii) tert-butyl hydroperoxide (t-BuOOH)-induced oxidative stress. In both toxicity models - CCl4 and t-BuOOH, AMFJ showed statistically significant cytoprotective and antioxidant activities. AMFJ prevented the loss of cell viability and GSH depletion, decreased LDH leakage and MDA production. The effects of AMFJ at the concentrations of 5, 10, 30, and 50 μg/ml were similar to those of the same concentrations of silymarin, while the effect of the highest AMFJ concentration of 100 μg/ml was higher than that of the same silymarin concentration. The effects were concentration-dependent and were more prominent in the t-BuOOH model, compared to those in the CCl4 model.
journal_name
Pharmacogn Magjournal_title
Pharmacognosy magazineauthors
Kondeva-Burdina M,Valcheva-Kuzmanova S,Markova T,Mitcheva M,Belcheva Adoi
10.4103/0973-1296.172967subject
Has Abstractpub_date
2015-10-01 00:00:00pages
S592-7issue
Suppl 4eissn
0973-1296issn
0976-4062pii
PM-11-592journal_volume
11pub_type
杂志文章abstract:BACKGROUND:Recently, many efforts have been made to discover new products of natural origin which can limit the xenobiotic-induced hepatic injury. Carbon tetrachloride (CCl4) is a highly toxic chemical that is widely used to study hepatotoxicity in animal models. OBJECTIVE:The present study was conducted to investigat...
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