PLEXIN-B2 promotes the osteogenic differentiation of human bone marrow mesenchymal stem cells via activation of the RhoA signaling pathway.

Plexin-B2 (PLXNB2), a transmembrane protein is found in various tissues. Recent studies have indicated the presence of PLXNB2 in large quantity in the growth plates of Sprague-Dawley rats and are believed to be potentially involved in their skeletal development. This study endeavored to analyze the effect of PLXNB2 on the osteogenic differentiation of BMSCs by using gene overexpression and knockdown assays. The results of our study revealed that PLXNB2 was upregulated during BMSCs differentiation into an osteoblastic lineage. By determining the expression levels of specific markers and mineral deposition, the study established that PLXNB2 promotes the osteogenic differentiation of human BMSCs through the activation of the RhoA signaling pathway. In conclusion, the study identified PLXNB2 as a novel regulator that enhanced the osteogenic differentiation of human BMSCs. The enhancing effect of PLXNB2 on osteogenesis of human BMSCs was mediated through activation of RhoA signaling. The results of our study imply that pharmacological targeting of PLXNB2 may initiate a possible improvement in bone formation.

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