HSD feeding decreased longevity of WNIN/Gr-Ob rats and was associated with significantly higher total neuronal DNA damage after three months of feeding but not later. In line with this was the increased neuronal oxidative stress (lipid peroxidation) and decreased antioxidant status (reduced glutathione and SOD activity) in HSD than Starch-based diet (SBD) fed rats. The results suggest that HSD feeding decreased the longevity of WNIN/Gr-Ob obese rats probably by increasing oxidative stress and aggravating IR, a condition that precedes T2D.
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