Novel mutations support a role for Profilin 1 in the pathogenesis of ALS.

Novel mutations support a role for Profilin 1 in the pathogenesis of ALS.
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DOI:
10.1016/j.neurobiolaging.2014.10.032
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发表时间:
2015-03
影响因子:
4.2
通讯作者:
Shaw CE
Shaw CE
中科院分区:
医学2区
文献类型:
--
作者:
Smith BN;Vance C;Scotter EL;Troakes C;Wong CH;Topp S;Maekawa S;King A;Mitchell JC;Lund K;Al-Chalabi A;Ticozzi N;Silani V;Sapp P;Brown RH Jr;Landers JE;Al-Sarraj S;Shaw CE

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最近,编码 profilin 1 (PFN1) 的基因突变已被证明会导致肌萎缩侧索硬化症 (ALS),这是一种致命的神经退行性疾病。我们对一组 ALS 患者 (n = 485) 的 PFN1 基因进行了测序,并检测到 2 个新变异(A20T 和 Q139L),以及 4 个病例具有先前发现的 E117G 罕见变异(约 1.2%)。对所有已发表的 E117G ALS+/- 额颞叶痴呆病例(包括本报告中确定的病例)进行的病例对照荟萃分析显着,p = 0.001,比值比 = 3.26(95% 置信区间,1.6–6.7),证明该变异是易感等位基因。现有患者的死后组织显示出典型的 TAR DNA 结合蛋白 43 病理学。在瞬时转染和 A20T 改变患者的成纤维细胞中,我们发现这种新的 PFN1 突变导致蛋白质聚集和不溶性高分子量物质的形成,这是 ALS 病理学的标志。我们的研究结果表明,PFN1 是 ALS 的罕见原因,并进一步增加了这种疾病潜在的遗传异质性。
Mutations in the gene encoding profilin 1 (PFN1) have recently been shown to cause amyotrophic lateral sclerosis (ALS), a fatal neurodegenerative disorder. We sequenced the PFN1 gene in a cohort of ALS patients (n = 485) and detected 2 novel variants (A20T and Q139L), as well as 4 cases with the previously identified E117G rare variant (∼ 1.2%). A case-control meta-analysis of all published E117G ALS+/− frontotemporal dementia cases including those identified in this report was significant p = 0.001, odds ratio = 3.26 (95% confidence interval, 1.6–6.7), demonstrating this variant to be a susceptibility allele. Postmortem tissue from available patients displayed classic TAR DNA-binding protein 43 pathology. In both transient transfections and in fibroblasts from a patient with the A20T change, we showed that this novel PFN1 mutation causes protein aggregation and the formation of insoluble high molecular weight species which is a hallmark of ALS pathology. Our findings show that PFN1 is a rare cause of ALS and adds further weight to the underlying genetic heterogeneity of this disease.
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