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- W4283763313 abstract "ABSTRACT Disuse and aging are known risk factors associated with low bone mass and quality deterioration, resulting in increased fracture risk. Indeed, current and emerging evidence implicate a large number of shared skeletal manifestations between disuse and aging scenarios. This review provides a detailed overview of current preclinical models of musculoskeletal disuse and the clinical scenarios they seek to recapitulate. We also explore and summarize the major similarities between bone loss after extreme disuse and advanced aging at multiple length scales, including at the organ/tissue, cellular, and molecular level. Specifically, shared structural and material alterations of bone loss are presented between disuse and aging, including preferential loss of bone at cancellous sites, cortical thinning, and loss of bone strength due to enhanced fragility. At the cellular level bone loss is accompanied, during disuse and aging, by increased bone resorption, decreased formation, and enhanced adipogenesis due to altered gap junction intercellular communication, WNT/β‐catenin and RANKL/OPG signaling. Major differences between extreme short‐term disuse and aging are discussed, including anatomical specificity, differences in bone turnover rates, periosteal modeling, and the influence of subject sex and genetic variability. The examination also identifies potential shared mechanisms underlying bone loss in aging and disuse that warrant further study such as collagen cross‐linking, advanced glycation end products/receptor for advanced glycation end products (AGE‐RAGE) signaling, reactive oxygen species (ROS) and nuclear factor κB (NF‐κB) signaling, cellular senescence, and altered lacunar‐canalicular connectivity (mechanosensation). Understanding the shared structural alterations, changes in bone cell function, and molecular mechanisms common to both extreme disuse and aging are paramount to discovering therapies to combat both age‐related and disuse‐induced osteoporosis. © 2022 American Society for Bone and Mineral Research (ASBMR)." @default.
- W4283763313 created "2022-07-02" @default.
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- W4283763313 creator A5091240537 @default.
- W4283763313 date "2022-07-28" @default.
- W4283763313 modified "2023-10-16" @default.
- W4283763313 title "Similarities Between Disuse and Age‐Induced Bone Loss" @default.
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