Abstract
The adipogenic capacity of mesenchymal stem cells (MSCs) and the involvement of beta-adrenergic signals in lipolysis and thermogenesis have been well established. However, little is known about the development of beta-adrenergic receptor (beta-AR) systems and the role of beta-adrenergic signals in adipogenic differentiation of MSCs. In this study, we demonstrated that both the mRNA and protein levels of beta2- and beta3-AR were up-regulated following adipogenesis of mouse bone marrow derived MSCs. We also established that beta-AR agonists negatively while antagonists positively affected MSC adipogenesis. Both the beta2- and beta3-AR were involved in MSC adipogenesis, with beta3-AR being the predominant subtype. The effect of beta-ARs on MSC adipogenesis was at least partly mediated via the cAMP/PKA signaling pathway. These findings suggested that MSC is also a target for beta-adrenergic regulation, and beta-adrenergic signaling (major beta3-signaling) plays a role in MSC adipogenesis.
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