Characterization and comparison of acidic polysaccharide populations in Atrina pectinata individuals

Cytoprotective Effects of an Aqueous Extracts from Atrina Pectinate Meat in H2O2-Induced Oxidative Stress in a Human Hepatocyte

In the present study, we investigated the antioxidant activity of an aqueous extract from Atrina pectinate meat (APW) against H₂O₂-induced oxidative stress in a human hepatocyte. The extraction yield of APW was 30.01 ± 0.83% and which contained the highest taurine content among free amino acid contents. APW led to the high antioxidant activity showing 2,2-azino-bis(3-ethylbenzthiazoline)-6-sulfonic acid (ABTS) radical scavenging activity, good reducing power and oxygen radical absorbance capacity (ORAC) value. Also, the results showed that APW improved the cell viability decreased by H₂O₂ stimulation as well as the reduction of intracellular reactive oxygen species (ROS) generation in hepatocytes. Additionally, APW up-regulated the production of antioxidant mechanisms related enzymes such as catalase and superoxide dismutase (SOD), compared to the only H₂O₂-treated hepatocytes. Moreover, APW increased the expressions of nuclear Nrf2 and cytosolic HO-1 in H₂O₂-treated hepatocytes. Interestingly, the treatment of ZnPP, a HO-1 inhibitor abolished the cell viability and intracellular ROS generation induced by APW treatment. In conclusion, this study suggests that APW protects H₂O₂ induced oxidative stress via up-regulating of Nrf2/HO-1 signal pathway in hepatocytes.