在ID/ASD风险基因CC2D1A中具有不确定的意义的变异的功能注释的新框架
Aniket Bhattacharya1, Paola Parlanti1, Luca Cavallo1
1Child Health Institute of New Jersey and Department of Neuroscience and Cell Biology, Rutgers - Robert Wood Johnson Medical School, 89 French Street, New Brunswick, NJ 08901, United States.
Human molecular genetics
|April 23, 2024
概括
研究人员开发了一个新的框架来评估CC2D1A基因中不确定的意义 (VUSs) 的遗传变异,该基因与智力障碍 (ID) 和自闭症谱系障碍 (ASD) 有关. 这种方法有助于澄清VUS对患者健康的影响.
科学领域:
- 遗传学 是一个遗传学.
- 神经发育障碍 神经发育障碍
- 分子生物学分子生物学
背景情况:
- 知识障碍 (ID) 和自闭症谱系障碍 (ASD) 是复杂的遗传障碍,具有众多已识别的风险基因.
- 通过外体序列测序发现的新型误解变异通常被归类为具有不确定的意义的变异 (VUSs),阻碍了临床遗传解释.
- CC2D1A是一种与自体逆向性ID和并发性ASD相关的基因,40%的病例表现出这些情况.
研究的目的:
- 开发和验证一个框架,用于在CC2D1A基因中表征VUS.
- 评估CC2D1A中的七个特定VUS对PKA-CREB信号通路的功能影响.
- 建立一种可扩展的测定方法,用于在CC2D1A和潜在的其他ID/ASD相关基因中注释VUS.
主要方法:
- 在HEK293细胞中克隆和过度表达七个CC2D1AVUS.
- 分析CC2D1A在PKA-CREB信号传递中的作用,包括PDE4D相互作用,cAMP水平和CREB激活.
- 使用 luciferase 试验来测量 CREB 转录活性,作为对变体影响的敏感读数.
主要成果:
- 在7个测试的CC2D1AVUS中,有5个 (p.Pro319Leu,p.Gly441Val,p.Val449Met,p.Thr580Ile和p.Arg886His) 显示出显著减弱的CREB激活反应.
- 测量CREB转录活性的光酶试验被证明是检测VUSs引起的功能缺陷的敏感方法.
- 开发的框架显示,目前在ClinVar中为CC2D1A.A.注释大约150个VUS的潜力.
结论:
- 开发的光酶测定框架有效地描述了CC2D1A VUSs对CREB信号的功能影响.
- 这种方法可以帮助解决CC2D1A中的VUS,有助于ID和ASD的遗传诊断.
- 鉴于CREB激活的共同作用,该范式可以适应与ASD和ID相关的其他基因的VUS分析.
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