Mechanism of IRF8 on osteocyte apoptosis in steroid-induced osteonecrosis of the femoral head.

Background: Steroid-induced osteonecrosis of the femoral head (SONFH) is a metabolic disorder that leads to structural changes, collapse of the femoral head, and joint dysfunction. This study investigates the role of interferon regulatory factor 8 (IRF8) in osteocyte apoptosis in SONFH, so as to find new targets for the treatment of SONFH.

Methods: Murine long bone osteocyte-Y4 cells were cultured and treated with dexamethasone to establish SONFH cell models.

Mefenamic acid exhibits antitumor activity against osteosarcoma by impeding cell growth and prompting apoptosis in human osteosarcoma cells and xenograft mice model.

The study investigates the anticancer activity of mefenamic acid against osteosarcoma, shedding light on its underlying mechanisms and therapeutic potential. Mefenamic acid exhibited robust inhibitory effects on the proliferation of MG-63, HOS, and H2OS osteosarcoma cells in a dose-dependent manner. Moreover, mefenamic acid induced cellular toxicity in MG63 cells, as evidenced by LDH leakage, reflecting its cytotoxic impact.

Ginsenoside Rb1 prevents steroid‑induced avascular necrosis of the femoral head through the bone morphogenetic protein‑2 and vascular endothelial growth factor pathway.

At present, the molecular mechanism underlying the protective effect of Ginsenoside Rb1 remains unclear. The present study was designed to investigate whether Ginsenoside Rb1 weakened the steroid‑induced avascular necrosis of the femoral head (SANFH) and to explore the possible mechanisms of the above effects. As a result, it was revealed that Ginsenoside Rb1 was protective against steroid‑induced avascular necrosis and inhibited serum osteocalcin in a rat model of SANFH.