SNCA and polycystic ovary syndrome: Heat shock protein 90 (HSP90AA1, HSP90) correlated positively with APP in both control and PCOS women (r = 0.35, p = 0.04 and r = 0.60, p = 0.0006, respectively), and correlated positively with SNCA (r = 0.44, p = 0.01) in PCOS women.