对具有46,XY性别发育差异的个体中SRY变异的功能分析
Firman P Idris1, Jocelyn van den Bergen2, Gorjana Robevska2
1Murdoch Children's Research Institute, Melbourne, Australia; Department of Paediatrics, The University of Melbourne, Melbourne, Australia.
Molecular and cellular endocrinology
|January 9, 2025
概括
在46例XY性别发育差异 (DSD) 病例中分析性别决定性-区域-Y (SRY) 基因变异,揭示了影响男性发育的三种致病变异. 这项研究澄清了SRY突变对改善诊断的功能后果.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 分子内分泌学分子内分泌学
背景情况:
- 哺乳动物的男性性发育受到性别决定区域Y (SRY) 基因的关键调节.
- 在SRY基因中的变异,特别是它的高流动性组 (HMG) 盒,是46,XY性别发育差异 (DSD) 的重要原因.
研究的目的:
- 在46,XY DSD.患者中发现的五种新型SRY编码变异的功能性特征.
- 为了确定这些变异对SRY蛋白局部化和交易活动的影响.
- 为了提高46,XY DSD携带SRY变异的患者的诊断确定性.
主要方法:
- 实验室功能测试用于评估细胞内的SRY蛋白位址.
- 使用响应SRY.的SOX9调节元件来测量交易活化活动.
- 使用in silico分析预测某些变体的DNA结合障碍.
主要成果:
- 在5种分析的SRY变种中,有3种 (p.Met85Thr,p.Arg86Ter,p.Tyr198Cysfs18) 显示出减少或消除的交换活动,表明病原性.
- 这种p.Arg86Ter变异是无法检测的,而p.Met85Thr则显示核局部化减少.
- 两种变体 (p.Asp58Glu,p.Arg75Lys) 尽管有in silico预测,但对本地化或活性没有显著影响.
结论:
- 该研究确定了三种新型SRY变异的可能致病性,有助于更好地了解46,XY DSD.
- 对SRY变种的功能性表征可以提高DSD患者的诊断准确性.
- 了解SRY变异的分子机制对于临床管理和遗传咨询至关重要.
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