OBJECTIVE: To initially investigate the function of neuronal pentraxin 1 ( METHODS: hBMSCs were induced to undergo osteogenic differentiation, and then RNA was collected at different time points, namely 0, 3, 7, 10 and 14 d. The mRNA expression levels of key genes related with osteogenic differentiation, including runt-related transcription factor 2 ( RESULTS: The results showed that during the osteogenic differentiation of hBMSCs