HMOX1 and polycystic ovary syndrome: Heme oxygenase 1 (HMOX1), Msh homeobox 1 (MSX1), and sulfiredoxin-1 (SRXN1) had lower expression in skeletal muscle from women with PCOS at baseline, and the expression was increased after a single bout of electroacupuncture in women with PCOS but not in controls.