SIKs control osteocyte responses to parathyroid hormone

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Author
Liang, Yanke
Goransson, Olga
Sundberg, Thomas B.
Williams, Elizabeth A.
O'Meara, Maureen J.
Beqo, Belinda
Brooks, Daniel J.
Martins, Janaina S.
Corbin, Braden
Anselmo, Anthony
Wu, Joy Y.
Sakamoto, Kei
Foretz, Marc
Divieti-Pajevic, Paola
Note: Order does not necessarily reflect citation order of authors.
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https://doi.org/10.1038/ncomms13176Metadata
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Wein, M. N., Y. Liang, O. Goransson, T. B. Sundberg, J. Wang, E. A. Williams, M. J. O'Meara, et al. 2016. “SIKs control osteocyte responses to parathyroid hormone.” Nature Communications 7 (1): 13176. doi:10.1038/ncomms13176. http://dx.doi.org/10.1038/ncomms13176.Abstract
Parathyroid hormone (PTH) activates receptors on osteocytes to orchestrate bone formation and resorption. Here we show that PTH inhibition of SOST (sclerostin), a WNT antagonist, requires HDAC4 and HDAC5, whereas PTH stimulation of RANKL, a stimulator of bone resorption, requires CRTC2. Salt inducible kinases (SIKs) control subcellular localization of HDAC4/5 and CRTC2. PTH regulates both HDAC4/5 and CRTC2 localization via phosphorylation and inhibition of SIK2. Like PTH, new small molecule SIK inhibitors cause decreased phosphorylation and increased nuclear translocation of HDAC4/5 and CRTC2. SIK inhibition mimics many of the effects of PTH in osteocytes as assessed by RNA-seq in cultured osteocytes and following in vivo administration. Once daily treatment with the small molecule SIK inhibitor YKL-05-099 increases bone formation and bone mass. Therefore, a major arm of PTH signalling in osteocytes involves SIK inhibition, and small molecule SIK inhibitors may be applied therapeutically to mimic skeletal effects of PTH.Other Sources
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5075806/pdf/Terms of Use
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