INDUCTION OF APOPTOSIS IN RAT LIVER CELLS VIA CASPASE ACTIVATION BY CHLOROFORM FRACTION OF METHANOL EXTRACT OF DRYMARIA CORDATA
Journal Title: European Journal of Biomedical and Pharmaceutical Sciences - Year 2018, Vol 5, Issue 4
Abstract
Modulators of mitochondrial Permeability Transition (mPT) pore opening are targets of drug development for conditions arising from dysregulated apoptosis. Drymaria cordata (DC) is a medicinal plant used locally in the treatment of tumors, but there is paucity of scientific information to justify these folkloric claims. In this study, the effects of chloroform fraction of the methanol extract of Drymaria cordata (CFDC), was investigated on mitochondrial-mediated apoptosis via induction of pore opening. The methanol extract (MEDC) was partitioned successively to obtain n-hexane (NFDC), chloroform (CFDC), ethylacetate (EFDC) and methanol (MFDC) fractions. The animals were equally divided into four groups. Groups I, II, III and IV were treated orally with distilled water, CFDC(50mg/kgbdwt), CFDC(100mg/kgbdwt) and CFDC(200mg/kgbdwt), respectively. Rat liver mitochondria were isolated by differential centrifugation. The effects of CFDC on mPT pore, mitochondrial ATPase activity, mitochondrial membrane lipid peroxidation, cytochrome C release, extent of DNA fragmentation, Caspases 9 and 3 activation and expressions of anti-apoptotic Bcl-2 protein were investigated. Data were analysed using ANOVA at α 0.05. Oral administration of CFDC at 50, 100 and 200mg/kgbdwt caused the induction of mPT pore opening by 25, 38 and 50%, respectively, and hepatic DNA fragmentation by 20%, 37% and 60%, respectively. CFDC showed significant enhancement of mitochondrial ATPase activity, activation of caspase 9 & 3 and positive immunohistochemical expression of cytochrome c and downregulation of anti-apoptotic Bcl-2 expression.These results suggest that CFDC contains bioactive agent that can induce mitochondrial-dependent cell death which might be relevant in situations where apoptosis needs to be upregulated.
Authors and Affiliations
A. O. Olowofolahan
Keywords
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