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首页> 外文期刊>Nature Genetics >Scapuloperoneal spinal muscular atrophy and CMT2C are allelic disorders caused by alterations in TRPV4.
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Scapuloperoneal spinal muscular atrophy and CMT2C are allelic disorders caused by alterations in TRPV4.

机译:肩oper骨脊髓性肌萎缩症和CMT2C是由TRPV4改变引起的等位基因疾病。

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摘要

Scapuloperoneal spinal muscular atrophy (SPSMA) and hereditary motor and sensory neuropathy type IIC (HMSN IIC, also known as HMSN2C or Charcot-Marie-Tooth disease type 2C (CMT2C)) are phenotypically heterogeneous disorders involving topographically distinct nerves and muscles. We originally described a large New England family of French-Canadian origin with SPSMA and an American family of English and Scottish descent with CMT2C. We mapped SPSMA and CMT2C risk loci to 12q24.1-q24.31 with an overlapping region between the two diseases. Further analysis reduced the CMT2C risk locus to a 4-Mb region. Here we report that SPSMA and CMT2C are allelic disorders caused by mutations in the gene encoding the transient receptor potential cation channel, subfamily V, member 4 (TRPV4). Functional analysis revealed that increased calcium channel activity is a distinct property of both SPSMA- and CMT2C-causing mutant proteins. Our findings link mutations in TRPV4 to altered calcium homeostasis and peripheral neuropathies, implying a pathogenic mechanism and possible options for therapy for these disorders.
机译:肩oper骨脊髓性肌萎缩症(SPSMA)和遗传性运动和感觉神经病IIC型(HMSN IIC,也称为HMSN2C或Charcot-Marie-Tooth疾病2C型(CMT2C))是表型异质性疾病,涉及到地形上截然不同的神经和肌肉。我们最初用SPSMA描述了一个由法国-加拿大起源的新英格兰大家庭,以及一个由CMT2C组成的美国英语和苏格兰裔大家庭。我们将SPSMA和CMT2C风险基因座映射到12q24.1-q24.31,两种疾病之间存在重叠区域。进一步的分析将CMT2C的风险位点降低到4-Mb区域。在这里,我们报告SPSMA和CMT2C是由编码瞬时受体潜在阳离子通道,亚家族V,成员4(TRPV4)的基因突变引起的等位基因疾病。功能分析表明,增加的钙通道活性是引起SPSMA和CMT2C的突变蛋白的独特特性。我们的发现将TRPV4的突变与钙稳态和周围神经病变的改变联系起来,这暗示着致病机制和治疗这些疾病的可能选择。

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