GPX4 and postmenopausal osteoporosis: The downregulation of myeloid zinc finger 1 (MZF1) expression, which activates the Nrf2/GPX4 pathway and inhibits rankl-induced ferroptosis in osteoclasts during early cell differentiation, may be a key mechanism underlying ovarian removal (OVX) mice models of postmenopausal osteoporosis (37).