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相关概念视频

Bone Disorders01:29

Bone Disorders

3.5K
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
3.5K
Bone Remodeling01:40

Bone Remodeling

38.3K
Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
38.3K

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Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
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探索骨矿物质密度和骨脆弱之间的因果关系:双向的门德尔随机化研究.

Jue-Xin Shen1, Yi Lu1, Wei Meng1

  • 1Department of Orthopedics, Chongming Branch, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.

PloS one
|January 25, 2024
PubMed
概括

低骨矿物质密度 (BMD) 可能因果性地增加骨脆弱的风险. 然而,这项研究没有发现任何证据表明虚弱导致低BMD,这表明BMD是虚弱的潜在风险因素.

科学领域:

  • 遗传学 是一个遗传学.
  • 老年学是一门学科.
  • 代谢性骨疾病 代谢性骨疾病

背景情况:

  • 低骨矿物质密度 (BMD) 和脆弱性之间的关系是复杂的,并未完全理解.
  • 现有的研究表明存在相关性,但因果关系需要进一步调查.

研究的目的:

  • 通过使用孟德尔随机化 (MR) 调查 BMD 和虚弱之间的双向因果关系.
  • 要确定低BMD是否是脆弱的因果风险因素,反之亦然.

主要方法:

  • 利用了来自多个骨部位 (部,前臂,大腿部,腰椎) 的BMD的大规模全基因组关联研究的总结统计数据,以及欧洲祖先参与者的脆弱指数.
  • 使用已建立的MR分析方法,包括逆方差加权 (IVW) 和加权中位数 (WM),以评估因果关系.
  • 进行了双向分析,以检查双向影响:骨质量对骨脆弱性和骨脆弱性对骨脆弱性.

主要成果:

  • 基因预测的部 BMD (e-BMD) 和前臂 BMD (FA-BMD) 显示出与脆弱性风险增加的潜在因果关系 (低 BMD 与更高的脆弱性相关).
  • 在对多次比较进行Bonferroni校正后,这些关联没有达到统计学意义.
  • 对于腿部部BMD (FN-BMD) 或腰椎BMD (LS-BMD) 在脆弱性上没有观察到显著的因果关系.

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  • 反向MR分析没有发现任何骨部位的骨骨骨上的脆弱因果关系的证据.

    • 结论:

    • 研究结果表明,低BMD可能是脆弱的潜在因果风险因素.
    • 该研究没有发现证据支持反向因果关系,其中脆弱导致低BMD.
    • 需要进一步的研究来证实低骨质量与脆弱性发展之间的因果关系.