NOS2 and polycystic ovary syndrome: RT-qPCR results showed that the expression levels of 7 core genes, including ATF3, BNIP3, DDIT4, LPIN1, NOS2, NQO1 and SLC2A1, were significantly downregulated in GCs of PCOS patients, whereas no significant difference was detected in SLC2A6 (Figures 8A–H).