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                标题: Vicissitudes of oxidative stress biomarkers in the estuarine crab Scylla
                查看权限: 需要 [至少会员] 级别才○能查看。
                发布时间: 2019-01-15 13:22:57
                信息简介: The primary objective of this study was to understand the impact of monsoon and summer seasons on the Polychlorinated Biphenyls (PCB's) and petroleum hydrocarbon compounds (PHC's) load in Ennore estuary and howthe physiological response of estuarine Scylla serrata inhabiting in this estuary changedwith reference to antioxidant defense. Seasonal levels of PCB's and PHC'swere assessed in thewater along with their bioaccumulation in gills, hemolymph, hepatopancreas and ovary of S. serrata. Concentration of PCB's and PHC's inwater and their bioaccumulation was found to be higher in summer season when compared to monsoon season. Enzymic antioxidant assays [superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX), glutathione reductase (GR), glutathione-S-transferase (GST)]; non-enzymic antioxidant assays [glutathione (GSH), vitamin C, vitamin E] and macromolecular alterations [membrane lipid peroxidation (LPO), and DNA Damage (strand breaks)] were assessed in the gills, hemolymph and hepatopancreas of S. serrata. There was a significant (p b 0.05) upregulation in lipid peroxidation activity and DNA damage activity collected during the summer season when compared to the pre- and post-monsoon seasons. On the contrary, the enzymic and non-enzymic antioxidants exhibited significant (p b 0.05) down regulation in the gills, hemolymph, hepatopancreas and ovary of S. serrata. Oxidative stress biomarkers represented a significant (p b 0.05) maximum in gills when compared to hemolymph and hepatopancreas of S. serrata. Present study provided scientific evidences of howthe antioxidant defense status of S. serrata responded to PCB's and PAH's stresswith reference to seasonal vicissitudes, which indirectly represented the environmental health conditions of the estuary.

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