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• W2922256857 abstract "Abstract The integrin α v β 3 has been shown to play an important role in osteocyte mechanotransduction. It has been reported that there are fewer β 3 integrin-containing cells in osteoporotic bone cells. Osteocytes cultured in vitro under estrogen deficient conditions demonstrate altered mechanotransduction. However, it is unknown whether the altered mechanotransduction in estrogen deficient osteocytes is directly associated with defective α v β 3 expression or signalling. The objective of this study is to investigate the role of estrogen deficiency for regulating MLO-Y4 cell morphology, α v β 3 expression, focal adhesion formation and mechanotransduction by osteocytes. Here, we report that estrogen withdrawal leads to a smaller focal adhesion area and reduced α v β 3 localisation at focal adhesion sites, resulting in an increased Rankl / Opg ratio and defective Cox-2 responses to oscillatory fluid flow. Interestingly, α v β 3 antagonism had a similar effect on focal adhesion assembly, Rankl / Opg ratio, and Cox-2 responses to oscillatory fluid flow. Taken together, our results provide the first evidence for a relationship between estrogen withdrawal and defective α v β 3 -mediated signalling. Specifically, this study implicates estrogen withdrawal as a putative mechanism responsible for altered α v β 3 expression and resultant changes in downstream signalling in osteocytes during post-menopausal osteoporosis, which might provide an important, but previously unidentified, contribution to the bone loss cascade." @default.
• W2922256857 created "2019-03-22" @default.
• W2922256857 creator A5020169130 @default.
• W2922256857 creator A5031407075 @default.
• W2922256857 creator A5063742245 @default.
• W2922256857 date "2019-03-15" @default.
• W2922256857 modified "2023-10-10" @default.
• W2922256857 title "Estrogen deficiency impairs integrin αvβ3-mediated mechanosensation by osteocytes and alters osteoclastogenic paracrine signalling" @default.
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• W2922256857 doi "https://doi.org/10.1038/s41598-019-41095-3" @default.
• W2922256857 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6420496" @default.
• W2922256857 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30874595" @default.
• W2922256857 hasPublicationYear "2019" @default.
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