在先天性长QT综合征中的遗传变异注释得分
Arwa Younis1,2, Christopher Bodurian1, Dan E Arking3
1Clinical Cardiovascular Research Center, University of Rochester Medical Center, Rochester, New York, USA.
概括
遗传变异得分可以准确地识别长QT综合征 (LQTS) 突变,但不能预测心脏事件. 突变的位置和功能对于评估LQTS患者风险至关重要.
科学领域:
- 心脏病学 心脏病学
- 遗传学 是一个遗传学.
- 生物信息学是一种生物信息学.
背景情况:
- 先天性长QT综合征 (LQTS) 是一种遗传性疾病,导致危险的心律不整.
- 准确的基因变异评估对于预测LQTS患者的结果至关重要.
- 目前的基因注释得分在LQTS中的表现需要评估.
研究的目的:
- 评估基因变异注释分数 (CADD,SIFT,REVEL,PolyPhen-2) 在识别LQTS引起突变方面的性能.
- 评估这些评分对LQTS患者心脏事件 (CE) 和危及生命的事件 (LTE) 的预测影响.
- 为了比较基因分数与突变位置/功能分类的预测能力.
主要方法:
- 评估了2025名具有独特突变 (LQT1-LQT3) 的LQTS患者.
- 使用CADD,SIFT,REVEL和PolyPhen-2算法计算患者特定的得分.
- 使用哈雷尔的C指数测试LQTS识别和CE/LTE预测的得分性能,并与突变位置/功能数据进行比较.
主要成果:
- 基因分数以很高的准确度识别出致病变体 (REVEL 100%,CADD 99%,SIFT 92%,PolyPhen-2 86%).
- 没有任何遗传分数与CE或LTE风险相关 (哈雷尔的C指数一般在0.50-0.54左右).
- 突变位置/功能分类独立预测CE (HR=1.88) 和LTE (HR=1.89).
结论:
- 已建立的遗传注释算法有效地识别了致病性LQTS变体.
- 这些得分缺乏对LQTS患者临床结果的预测能力.
- 突变定位和功能测定对于准确的LQTS风险评估至关重要.
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