Mutations in the formin gene INF2 cause focal segmental glomerulosclerosis.

Mutations in the formin gene INF2 cause focal segmental glomerulosclerosis.
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DOI:
10.1038/ng.505
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发表时间:
2010-01
期刊:
影响因子:
30.8
通讯作者:
--
中科院分区:
生物学1区
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局灶节段性肾小球硬化症(FSGS)是一种肾脏损伤模式,可作为特发性发现或作为潜在全身性疾病的结果观察到。已经鉴定了几种基因,当突变时,其导致遗传性FSGS和/或肾病综合征。这些发现加速了对肾小球足细胞功能和疾病的理解,激发了我们对其他FSGS基因的研究。利用连锁分析,我们确定了一个常染色体显性FSGS基因座上的染色体14 q的区域。通过对该区域的多个基因进行测序,我们检测到INF 2中9个独立的非保守错义突变,INF 2编码肌动蛋白调节蛋白家族的一个成员。这些突变,都在透明的抑制结构域,分离与疾病在11个无关的家庭,改变高度保守的氨基酸残基。足细胞表达的肌动蛋白突变导致FSGS的观察结果突出了肌动蛋白聚合在足细胞功能中的精细调节的重要性。
Focal segmental glomerulosclerosis (FSGS) is a pattern of kidney injury observed either as an idiopathic finding or as a consequence of underlying systemic conditions. Several genes have been identified which, when mutated, lead to inherited FSGS and/or the nephrotic syndrome. These findings have accelerated the understanding of glomerular podocyte function and disease, motivating our search for additional FSGS genes. Using linkage analysis, we identified a locus for autosomal dominant FSGS on a region of chromosome 14q. By sequencing multiple genes in this region, we detected nine independent non-conservative missense mutations in INF2, which encodes a member of the formin family of actin regulating proteins. These mutations, all within the diaphanous inhibitory domain, segregate with disease in 11 unrelated families and alter highly conserved amino acid residues. The observation that mutations in this podocyte-expressed formin cause FSGS highlights the importance of fine regulation of actin polymerization in podocyte function.
DOI: 10.1038/ng1295-402
发表时间: 1995-12-01
期刊: NATURE GENETICS
影响因子: 30.8
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