Lrp5 functions in bone to regulate bone mass.

Lrp5 functions in bone to regulate bone mass.
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DOI:
10.1038/nm.2388
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发表时间:
2011-06
期刊:
影响因子:
82.9
通讯作者:
--
中科院分区:
医学1区
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人体骨骼受到低密度脂蛋白受体相关蛋白 5 (LRP5) 突变的影响。为了了解 LRP5 如何影响骨骼特性,我们培育了具有诱导性 Lrp5 突变的小鼠,这些突变会导致人类出现高骨量和低骨量表型。我们有条件地诱导骨细胞中的 Lrp5 突变,发现这些小鼠的骨特性与具有遗传突变的小鼠的骨特性相当。我们还在对附肢骨骼而非中轴骨骼有贡献的细胞中有条件地诱导了 Lrp5 突变,并且我们观察到四肢而不是脊柱的骨骼特性发生了改变。这些数据表明,Lrp5 信号传导在局部发挥作用,并表明增加成熟骨细胞中的 LRP5 信号传导可作为治疗人类低骨量疾病(例如骨质疏松症)的策略。
The human skeleton is affected by mutations in Low-density lipoprotein Receptor-related Protein 5 (LRP5). To understand how LRP5 influences bone properties, we generated mice with inducible Lrp5 mutations that cause high bone mass and low bone mass phenotypes in humans. We conditionally-induced Lrp5 mutations in osteocytes and found that bone properties in these mice were comparable to bone properties in mice with inherited mutations. We also conditionally-induced an Lrp5 mutation in cells that contribute to the appendicular skeleton, and not to the axial skeleton, and we observed bone properties were altered in the limbs, and not in the spine. These data indicate that Lrp5 signaling functions locally and suggest increasing LRP5 signaling in mature bone cells as a strategy to treat human low bone mass disorders, such as osteoporosis.
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