alexa Modulation of Bax Bcl-2 and caspases by probiotics during acetaminophen induced apoptosis in primary hepatocytes.
Molecular Biology

Molecular Biology

Journal of Cytology & Histology

Author(s): Sharma S, Singh RL, Kakkar P

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Abstract Oxidative stress is an important factor in drug induced hepatotoxicity and antioxidants from natural sources have potential to ameliorate it. The present study was aimed to investigate cyto-protective potential of probiotic Enterococcus lactis IITRHR1 (El(SN)) and Lactobacillus acidophilus MTCC447 (La(SN)) lysate against acetaminophen (APAP) induced hepatotoxicity. Cultured rat hepatocytes pretreated with El(SN)/La(SN) showed higher cell viability under APAP stress. Pre-treatment with El(SN,) restored glutathione level and reduced ROS generation significantly which are major biomarkers of oxidative stress. It also reduced NO level, MDA formation and enhanced SOD activity. Pre-treatment with probiotic lysates significantly inhibited the translocation of pro-apoptotic protein (Bax), enhanced anti-apoptotic (Bcl-2) protein levels and prevented release of cyt c to cytosol; suggesting involvement of mitochondrial proteins in protection against APAP induced oxidative cellular damage. Loss in mitochondrial membrane potential due to APAP treatment was prevented in the presence of probiotic lysates. Protective action of El(SN)/La(SN) pretreatment was further supported by prevention of procaspase-3 activation, DNA fragmentation and chromatin condensation, in turn inhibiting APAP induced apoptotic cell death. The results indicate that probiotic preparations modulate crucial end points of oxidative stress induced apoptosis and may be used for management of drug induced liver injury. Copyright © 2010 Elsevier Ltd. All rights reserved. This article was published in Food Chem Toxicol and referenced in Journal of Cytology & Histology

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