beta2- and beta3-, but not beta1-adrenergic receptors are involved in osteogenesis of mouse mesenchymal stem cells via cAMP/PKA signaling.
The osteogenic capacity of mesenchymal stem cells (MSCs) and the importance of beta-adrenergic signals in bone formation and resorption have been well investigated. However, little is known about the development of beta-adrenergic receptor (beta-AR) systems and the role of beta-adrenergic signals in osteogenic differentiation of MSCs, which is critically important in bone physiology and pharmacology. In this study, we demonstrated that both the mRNA and protein levels of beta2- and beta3-AR are up-regulated following osteogenesis of mouse MSCs. We also established that beta-AR agonists negatively while antagonists positively affect MSC osteogenesis. Both beta2- and beta3-AR are involved in MSC osteogenesis, with beta2-AR being dominant. The effect of beta-ARs on MSC osteogenesis is partly mediated via the cAMP/PKA signaling. These findings suggest that MSC is also a target for beta-adrenergic regulation and beta-adrenergic signaling plays a role in MSC osteogenesis.
Department of Biological Sciences and Biotechnology, Tsinghua University, Beijing 100084, PR China.
Haifang
H
Li
Chichun
C
Fong
Yao
Y
Chen
Guoping
G
Cai
Mengsu
M
Yang
D000818:Animals; D002454:Cell Differentiation; D002478:Cells, Cultured; D000242:Cyclic AMP / Q000378:metabolism*; D017868:Cyclic AMP-Dependent Protein Kinases / Q000378:metabolism*; D005260:Female; D059630:Mesenchymal Stem Cells / Q000166:cytology* / Q000502:physiology*; D051379:Mice; D010006:Osteoblasts / Q000166:cytology* / Q000502:physiology*; D010012:Osteogenesis / Q000502:physiology; D018343:Receptors, Adrenergic, beta-2 / Q000378:metabolism*; D022702:Receptors, Adrenergic, beta-3 / Q000378:metabolism*; D015398:Signal Transduction / Q000502:physiology
D018343:Receptors, Adrenergic, beta-2; D022702:Receptors, Adrenergic, beta-3; D000242:Cyclic AMP; D017868:Cyclic AMP-Dependent Protein Kinases