一个感受受体基序列和基因驱动的低血症的低诊断
Jeremy B Chang1, Connor P Barnhill1, Alexander M Apostolov2
1BridgeBio Pharma, 3160 Porter Drive, Suite 250, Palo Alto, CA 94304, USA.
自体主导性低血症1型 (ADH1) 诊断不足,许多患者表现出症状,但缺乏诊断代码. 感受受体 (CaSR) 基因的新变异对ADH1相关的低血症有显著的贡献.
科学领域:
- 遗传学 遗传学 是一个
- 内分泌学 在内分泌学.
- 生物信息学是一种生物信息学.
背景情况:
- 由于基因组测序,越来越多地发现了罕见的单基因疾病.
- 1型自体主导性低血症 (ADH1) 是一种罕见的疾病,由感受受体 (CaSR) 基因中的功能增益 (GoF) 变异引起.
- 了解变异性致病性和临床表现的全谱对于罕见疾病至关重要.
研究的目的:
- 在大型生物库中调查GoF CASR变异的流行率,透率和表达力.
- 确定新的ADH1相关变异,并评估它们对低血症的贡献.
- 提高对CASR相关疾病中基因型-表型关系的理解.
主要方法:
- 分析了三大生物库 (英国生物库,我们所有人,大众大学布里格姆生物库) 的GoF CASR变体.
- 开发一个评分算法来识别低频ADH1相关变体.
- 通过基因测序和体外功能测定验证已识别的变异.
主要成果:
- 已知ADH1变异的个体表现出低血症,但往往缺乏相关的诊断代码,表明诊断不足.
- 确定了9种新的低频ADH1相关变体,表现出中间效应和频率.
- 这些新型变异导致的症状负担与以前报告的ADH1变异相美.
结论:
- 由于CaSR GoF变异导致ADH1的低血症可能在一般人群中被诊断不足.
- 这项研究扩展了CASR变异的等位列,完善了基因型-表型相关性.
- 单一性疾病基因的罕见变异可能集体贡献大量的疾病负担.
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