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• W2988615195 endingPage "115148" @default.
• W2988615195 startingPage "115148" @default.
• W2988615195 abstract "Many signaling pathways involved in bone homeostasis also participate in the anabolic response of bone to mechanical loading. For example, TGFβ signaling coordinates the maintenance of bone mass and bone quality through its effects on osteoblasts, osteoclasts, and osteocytes. TGFβ signaling is also essential for the mechanosensitive formation of new bone. However, the mechanosensitive mechanisms controlling TGFβ signaling in osteocytes remain to be determined, particularly those that integrate TGFβ signaling with other early responses to mechanical stimulation. Here, we used an in vivo mouse hindlimb loading model to identify mechanosensitive molecules in the TGFβ pathway, and MLO-Y4 cells to evaluate their interactions with the prostaglandin E2 (PGE2) pathway, which is well-known for its rapid response to mechanical stimulation and its role in bone anabolism. Although mRNA levels for several TGFβ ligands, receptors, and effectors were unchanged, the level of phosphorylated Smad2/3 (pSmad2/3) was reduced in tibial bone as early as 3 h after early mechanical stimulation. We found that PGE2 and its receptor, EP2, repress pSmad2/3 levels and transactivation of Serpine1 in osteocytes. PGE2 and EP2 control the level of pSmad2/3 through a proteasome-dependent mechanism that relies on the deubiquitinase CYLD. CYLD protein levels were also reduced in the tibiae within 3 h of mechanical loading. Using CYLD-deficient mice, we found that CYLD is required for the rapid load-mediated repression of pSmad2/3 and for load-induced bone formation. These data introduce CYLD as a mechanosensitive deubiquitinase that participates in the prostaglandin-dependent repression of TGFβ signaling in osteocytes." @default.
• W2988615195 created "2019-11-22" @default.
• W2988615195 creator A5048510971 @default.
• W2988615195 creator A5076019491 @default.
• W2988615195 creator A5076996836 @default.
• W2988615195 date "2020-02-01" @default.
• W2988615195 modified "2023-10-16" @default.
• W2988615195 title "CYLD, a mechanosensitive deubiquitinase, regulates TGFβ signaling in load-induced bone formation" @default.
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• W2988615195 doi "https://doi.org/10.1016/j.bone.2019.115148" @default.
• W2988615195 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7032548" @default.
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