SOD2 and polycystic ovary syndrome: To better illustrate the anti-oxidation, anti-apoptosis, and pro-proliferation effects of trehalose in KGN cells, we selected the antioxidant molecules SOD2, pro-apoptotic molecules BAX, Cleaved caspase-9 molecules and anti-apoptotic molecules BCL-2 that are altered in PCOS mouse ovaries.