Abstract

An imbalance in osteogenesis and adipogenesis is a crucial pathological factor in the development of osteoporosis. Many attempts have been made to develop drugs to prevent and treat this disease. In the present study, we investigated the phenomenon whereby downregulation of SLC7A11 significantly enhanced the osteogenic differentiation of mesenchymal stem cells (MSCs) in vitro, and promoted the bone formation in vivo. Sulfasalazine (SAS), an inhibitor of SLC7A11, increased the osteogenic potential effectively. Mechanistically, inhibition of SLC7A11 by SAS treatment or knockdown of SLC7A11 increased BMP2/4 expression dramatically. In addition, we detected increased Slc7a11 expression in bone marrow MSCs of ovariectomized (OVX) mice. Remarkably, SAS treatment attenuated bone loss in ovariectomized mice. Together, our data suggested that SAS could be used to treat osteoporosis by enhancing osteogenic differentiation of MSCs. © 2016 American Society for Bone and Mineral Research.

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