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Prednisolone induces osteocytes apoptosis by promoting Notum expression and inhibiting PI3K/AKT/GSK3 β/β-catenin pathway
AbstractThe apoptosis of mature osteocytes is the main factor causing damage to the microstructure of cortical bone in glucocorticoid-induced osteoporosis (GIOP). Our previous research found damaged areas and empty osteocytes lacunae in the tibial cortical bone of GIOP mice. However, the specific mechanism has not been clarified. Recently, a study showed that the quality of the cortical bone significantly increased by knocking out Notum, a gene encoding α/β hydrolase. However, it is not clear whether Notum affects cortical bone remodeling by participating in glucocorticoids (GCs)-induced apoptosis of osteocytes. The pres...
Source: Journal of Molecular Histology - July 23, 2021 Category: Laboratory Medicine Source Type: research

Glucocorticoids Disrupt Skeletal Angiogenesis Through Transrepression of NF ‐κB–Mediated Preosteoclast Pdgfb Transcription in Young Mice
ABSTRACTIn the growing skeleton, angiogenesis is intimately coupled with osteogenesis. Chronic, high doses of glucocorticoids (GCs) are associated with decreased bone vasculature and induce osteoporosis and growth failure. The mechanism of GC ‐suppression of angiogenesis and relationship to osteoporosis and growth retardation remains largely unknown. Type H vessels, which are regulated by preosteoclast (POC) platelet‐derived growth factor–BB (PDGF‐BB), are specifically coupled with bone formation and development. We determined th e effect of GCs on POC synthesis of PDGF‐BB in relation to type H vessel formation, ...
Source: Journal of Bone and Mineral Research - March 30, 2020 Category: Orthopaedics Authors: Yi Peng, Shan Lv, Yusheng Li, Jianxi Zhu, Shijie Chen, Gehua Zhen, Xu Cao, Song Wu, Janet L. Crane Tags: Original Article Source Type: research

Glucocorticoids disrupt skeletal angiogenesis through transrepression of NF ‐κB‐mediated preosteoclast Pdgfb transcription in young mice
This article is protected by copyright. All rights reserved.
Source: Journal of Bone and Mineral Research - February 27, 2020 Category: Orthopaedics Authors: Yi Peng, Shan Lv, Yusheng Li, Jianxi Zhu, Shijie Chen, Gehua Zhen, Xu Cao, Song Wu, Janet L. Crane Tags: Original Article Source Type: research