Burden of rare variants in ALS genes influences survival in familial and sporadic ALS

Burden of rare variants in ALS genes influences survival in familial and sporadic ALS
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DOI:
10.1016/j.neurobiolaging.2017.06.007
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发表时间:
2017-10-01
影响因子:
4.2
通讯作者:
Ho, Shu-Leong
Ho, Shu-Leong
中科院分区:
医学2区
文献类型:
--
作者:
Pang, Shirley Yin-Yu;Hsu, Jacob Shujui;Ho, Shu-Leong

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遗传变异与肌萎缩侧索硬化症 (ALS) 的发展有关,但目前尚不清楚 ALS 基因中罕见变异的负担是否对生​​存产生影响。我们对 8 名具有超氧化物歧化酶 1 (SOD1) 突变的家族性 ALS (FALS) 患者进行了全基因组测序,并对居住在香港的 46 名散发性 ALS (SALS) 患者进行了全外显子组测序,发现 67% 的患者 40 个 ALS 基因的外显子中至少有 1 个罕见变异; 22% 有 2 个或更多。具有 2 个或更多罕见变异的患者比具有 0 或 1 个变异的患者的生存概率更低 (p = 0.001)。调整其他因素后,每增加一种罕见变异都会使呼吸衰竭或死亡的风险增加 60% (p = 0.0098)。罕见变异的存在与 ALS 风险相关(比值比 1.91,95% 置信区间 1.03-3.61,p = 0.03),并且 ALS 患者的罕见变异负担高于对照组(MB,p = 0.004)。我们的研究结果支持寡基因基础,罕见变异影响 ALS 的发展和生存。 (C) 2017 年作者。由 Elsevier Inc. 出版。这是一篇遵循 CC BY-NC-ND 许可证 (http://creativecommons.org/licenses/by-nc-nd/4.0/) 的开放获取文章。
Genetic variants are implicated in the development of amyotrophic lateral sclerosis (ALS), but it is unclear whether the burden of rare variants in ALS genes has an effect on survival. We performed whole genome sequencing on 8 familial ALS (FALS) patients with superoxide dismutase 1 (SOD1) mutation and whole exome sequencing on 46 sporadic ALS (SALS) patients living in Hong Kong and found that 67% had at least 1 rare variant in the exons of 40 ALS genes; 22% had 2 or more. Patients with 2 or more rare variants had lower probability of survival than patients with 0 or 1 variant (p = 0.001). After adjusting for other factors, each additional rare variant increased the risk of respiratory failure or death by 60% (p = 0.0098). The presence of the rare variant was associated with the risk of ALS (Odds ratio 1.91, 95% confidence interval 1.03-3.61, p = 0.03), and ALS patients had higher rare variant burden than controls (MB, p = 0.004). Our findings support an oligogenic basis with the burden of rare variants affecting the development and survival of ALS. (C) 2017 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).