| Objective This study aimed to explore the modulatory effects of Bushen Huatan prescription–containing serum on the osteogenic and adipogenic differentiation potential of bone marrow-derived mesenchymal stem cells (BMSCs), as well as its influence on autophagic activity, in order to elucidate its possible mechanism in preventing and managing postmenopausal osteoporosis (PMOP). Methods BMSCs were exposed to medicated serum prepared with the Bushen Huatan formula. Cell viability was assessed via the CCK-8 assay to identify the optimal concentration for intervention. The extent of extracellular matrix mineralization and intracellular lipid accumulation was evaluated using Alizarin Red S and Oil Red O staining, respectively. Western blotting was applied to examine protein levels associated with osteogenesis (BMP2, RUNX2, Collagen I), adipogenesis (PPARγ, C/EBPα, C/EBPβ), and autophagy (Atg13, Beclin1, LC3-II/I). Gene expression linked to autophagy was quantified through quantitative real-time polymerase chain reaction (qRT-PCR). The presence and abundance of autophagic structures were further confirmed by transmission electron microscopy (TEM). Results Serum containing the Bushen Huatan prescription significantly enhanced matrix mineral deposition and reduced lipid storage in BMSCs. The expression of osteogenic markers (BMP2, RUNX2, Collagen I) was markedly elevated (P < 0.05), while levels of adipogenic markers (PPARγ, C/EBPα, C/EBPβ) were suppressed (P < 0.05). Moreover, both transcriptional and translational indicators of autophagy-including Atg13, Beclin1, and the LC3-II/I ratio-showed significant upregulation (P < 0.05). TEM analysis revealed an increased formation of autophagosomes following treatment. Conclusion Bushen Huatan–derived serum may exert its protective effects against PMOP by enhancing autophagic flux in BMSCs, thereby promoting osteoblastic differentiation and inhibiting adipogenic commitment. This dual regulation contributes to restoring the bone–fat homeostatic balance in the bone marrow microenvironment. |