Abstract：
:Chondrogenic differentiation of mesenchymal stem cells (MSCs) is critical for successful cartilage regeneration. Several methods have been developed to attempt to chondrogenic differentiation, because chondrogenic differentiated cells can form stable cartilage and induce expression of a cartilage-specific phenotype. In this study, we found that both H-89 and microRNA-23b induced differentiation into chondrocyte of hMSCs through down-regulation of protein kinase A (PKA) signaling. The small molecule, H-89, was identified by PCA analysis as a potential mediator of chondrogenic differentiation. H-89 induced the expression of the chondrocyte marker, aggrecan, as well as miR-23b. We searched that miR-23b regulates protein level of PKA. When miR-23b was transfected into hMSCs, chondrogenic differentiation was induced. We confirmed the target of miR-23b using a reporter gene assay. Furthermore, not only H-89 or miR-23b-treated cells, but also cell co-treated with H-89 and miR-23b differentiated into chondrocytes. Our results indicate that H-89 induces the expression of endogenous miR-23b, thereby inducing chondrogenic differentiation by negatively inhibition of PKA signaling.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Ham O,Song BW,Lee SY,Choi E,Cha MJ,Lee CY,Park JH,Kim IK,Chang W,Lim S,Lee CH,Kim S,Jang Y,Hwang KCdoi
10.1016/j.biomaterials.2012.03.025subject
Has Abstractpub_date
2012-06-01 00:00:00pages
4500-7issue
18eissn
0142-9612issn
1878-5905pii
S0142-9612(12)00297-9journal_volume
33pub_type
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