BAK1 and sarcopenia: The above results also indicated that the sarcopenia serum samples had increased levels of proinflammatory cytokines, and we next sought to determine if the inflammatory status could affect the expression of BAK1. For this purpose, we firstly treated HSMM-1 cells with different concentrations of LPS (0, 50, 100 and 200 ng/mL) and IL-1β (0, 1, 5 and 25 ng/mL), followed by determining miR-532-3p and BAK1 levels.