ABSTRACT
Objective To observe the expression of core-binding factor ?1 (Cbf?1) in aging osteoblast, and try to provide new mechanisms of Chinese medicine on bone formation. Methods Rat osteoblast from different age donors (6 months and 16 months) were isolated and cultured by the tissue-fragment-migrating-growth method. The biological characteristic was observed by phase-contrast microscope and identified with mineralizing nodule staining. The expression of Cbf?1 was examined by RT-PCR and immunohistochemistry. Results RT-PCR and immunohistochemistry showed that the expression of Cbf?1 was upregulated by Gubenzhuanggu and Jinkuishenqi, and downregulated by Zhibaidihuang in aging osteoblast, but the effect was different on the Cbf?1 expression in Bushenyijing. Conclusion Buyang Chinese medicine among Bushen Chinese medicine promoted bone formation.