在13,845个病例中对变异丰富的定量值:改善遗传性听力损失的致病性分类
Sihan Liu1,2, Mingjun Zhong2, Yu Huang2
1Department of Oto-Rhino-Laryngology, West China Hospital, Sichuan University, Chengdu, 610000, China.
Genome medicine
|December 19, 2023
概括
本研究确定了遗传性听力损失 (HL) 病例中变异丰富的定量值,通过改进致病性标准来提高临床遗传测试的准确性.
科学领域:
- 遗传学 是一个遗传学.
- 医学遗传学 医学遗传学
- 基因组医学是基因组医学.
背景情况:
- 目前的指导方针缺乏对病原性评估中的变异性缩值 (PS4标准) 的定量支持.
- 需要真实世界的数据来建立强大的PS4门来确定孟德尔障碍.
研究的目的:
- 通过使用遗传性听力损失 (HL) 的大量病例对照队列来评估和确定定量PS4值.
- 通过改进的致病性标准,提高临床遗传测试的精度和准确性.
主要方法:
- 分析了来自13,845名HL患者和6,570名对照组的9,050种变异.
- 计算了积极的概率比率,以根据等位基频率和病例/对照的存在来定义三个变异子集的值.
- 应用已确定的值来重新分类变体并评估诊断产量.
主要成果:
- 定义了强烈,中度和支持病原性证据的特定几率比率 (OR) 和等位基因计数值.
- 在小组1 (AF≥0.0005例) 中,OR≥6表明有强烈证据,OR≥3中度.
- 在第2和第3个子集 (较低的AF或仅案例变异) 中,定义了PS4_Supporting (OR>2.27或等位基数≥3) 和PS4_Moderate (等位基数≥6) 的值.
结论:
- 量化证据强度值,用于变体丰富的遗传HL.
- 证明调整后的PS4标准改变了变种分类,并允许进行额外的诊断.
- 强调在临床遗传检测中需要疾病/基因特异性值.
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