Oxidative Stress

To evaluate the heapatoprotective activity of various extracts of Aegle Marmelos, belonging to the family Rutaceae against Carbon Tetrachloride (CCL4­) induced hepatootxicity in wistar Female rats. Oxidative stress play important role in many diseases. Hence, Herbal drugs play crucial role in treatment of various diseases due to its antioxidant property. The toxicant was used to induce hepatotoxicity at dose of CCl4  1.25 ml/kg of body weight as mixture of 1:1 with olive oil for 30 days. Experimental groups of were constructed: a vehicle control group received the respective vehicles; a CCl4 group received a repeated single oral dose of CCl4 at 1.25 ml/kg; and the CCl4 &AMPE, AMCL.AMAL, AMAQ received repeated oral dose of Aegel Marmelos extracts in 500 mg/kg, respectively. It was found that AMCL, AMAL & AMAQ, at a dose of 500 mg/kg body weight exhibited hepatoprotective effect by lowering the Serum Glutamate Pyruvate Transaminase (SGPT), Serum Glutamate Oxaloacetate Transaminase (SGOT), alkaline phosphate and total bilirubin to a significant extent. The groups treated with various extract of A.Marmelos & Silyamarine shows significant (P

Mitochondrion plays an important role in cellular metabolism and in energy production. Free radicals contribute damage to mitochondria during various pathological conditions. Tamoxifen is an anti-estrogen drug given to treat breast cancer. Tamoxifen and its metabolites induce varied cellular effects. It was therefore planned to study the impact of tamoxifen on mitochondria to observe its mechanism of action in promoting cell death. Mitochondrion was isolated from sheep liver and different concentrations of tamoxifen were added to study its impact on oxidative stress. Tamoxifen induced swelling of mitochondria which in turn produced lipid peroxides in a dose-dependent manner. Tamoxifen significantly increased the levels of nitrite and nitrate in mitochondria with depletion of glutathione. It was observed that tamoxifen increased NADH oxidation leading to the release of calcium from mitochondria. These changes observed are correlated with the mechanism of action of tamoxifen in treating breast cancer.