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- W2032044482 abstract "The objective of this study was to investigate the role of the serine-threonine kinase mitogen-activated protein kinase 2 (MK2) in bone homeostasis. Primary bone cell cultures from MK2(+/+) and MK2(-/-) mice were assessed for osteoclast and osteoblast differentiation, bone resorption, and gene expression. Bone architecture of MK2(+/+) and MK2(-/-) mice was investigated by micro-computed tomography and histomorphometry. Ovariectomy was performed in MK2(+/+) and MK2(-/-) mice to assess the role of MK2 in postmenopausal bone loss. Osteoclastogenesis, bone resorption, and osteoclast gene expression were significantly impaired in monocytes from MK2(-/-) compared to MK2(+/+) mice. Mechanistically, loss of MK2 causes impaired DNA binding of c-fos and nuclear factor of activated T cells cytoplasmic 1 (NFATc1) to tartrate-resistant acid phosphatase (TRAP) and the calcitonin receptor gene promoter. In addition, MK2(-/-) mice showed an age-dependent increase in trabecular bone mass and cortical thickness, fewer osteoclasts, and lower markers of bone resorption than MK2(+/+) mice. Furthermore, MK2(-/-) mice were protected from ovariectomy-induced bone loss. Osteoblastogenesis and bone formation were unchanged in MK2(-/-) mice, whereas osteoblast expression of osteoprotegerin (OPG) and serum levels of OPG were higher in MK2(-/-) than in MK2(+/+) mice. Loss of MK2 effectively blocks bone resorption and prevents the development of postmenopausal bone loss. Small-molecule inhibitors of MK2 could thus emerge as highly effective tools to block bone resorption and to treat postmenopausal bone loss." @default.
- W2032044482 created "2016-06-24" @default.
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- W2032044482 date "2013-03-18" @default.
- W2032044482 modified "2023-09-28" @default.
- W2032044482 title "Mitogen-activated protein kinase 2 regulates physiological and pathological bone turnover" @default.
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- W2032044482 doi "https://doi.org/10.1002/jbmr.1816" @default.
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