Research Article

Melatonin Protects Goat Spermatogonial Stem Cells against Oxidative Damage during Cryopreservation by Improving Antioxidant Capacity and Inhibiting Mitochondrial Apoptosis Pathway

Figure 8

Effects of different melatonin concentrations on the antioxidant enzyme activity of spermatogonial stem cells (SSCs) during cryopreservation. (a) Superoxide dismutase (SOD) activity. (b) Catalase (CAT) activity. (c) Reduced glutathione (GSH) activity. (d) Oxidized glutathione (GSSG) activity. (e) GSH/GSSG ratio, which is an indirect indicator of glutathione peroxidase (GSH-Px) activity. Different superscript letters (A–C) indicate significant differences (). Values are expressed as the ().
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