JCI:泛素连接酶RNF146协调骨骼动力学和能量代谢

2017-06-10 Yara MedSci原创

在成骨细胞谱系中丧失RNF146的小鼠由于缺陷的成骨细胞形成和随后的骨钙素生成受损,脂肪储存增加,并且具有严重的骨质减少导致的葡萄糖不耐受。这些研究结果表明,在胚胎和产后骨发育过程中RNF146需要与成骨细胞谱系中的β-连环蛋白信号协调发挥作用。

颅内发育不良(CCD)是以异常骨发育为特征的常染色体显性遗传性人类疾病,主要是由于成骨细胞膜内骨形成不良。最近,研究人员发现了缺乏E3泛素连接酶RNF146的小鼠品系表现出与CCD相似的表型。RNF146的损失稳定了其底物AXIN1,导致WNT3a诱导的β-连环蛋白活化受损,并降低成骨细胞中的Fgf18表达。他们发现FGF18能够诱导表达具有PDZ结合基序(TAZ)的转录共激活因子,其也是受到转录增强子缔合域(TEAD)和runt相关转录因子2(RUNX2)调控的成骨细胞增殖和分化所需的。最后,研究人员证明脂肪生成在Rnf146 - / - 小鼠胚胎成纤维细胞增多。此外,在成骨细胞谱系中丧失RNF146的小鼠由于缺陷的成骨细胞形成和随后的骨钙素生成受损,脂肪储存增加,并且具有严重的骨质减少导致的葡萄糖不耐受。这些研究结果表明,在胚胎和产后骨发育过程中RNF146需要与成骨细胞谱系中的β-连环蛋白信号协调发挥作用。

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    2017-07-08 ay2000fy
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    2017-06-18 日月生辉

    学习了,增长知识了!

    0

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