双生殖基因BRCA1 框架转移突变与孤立的卵巢储备减少相关
Anne Helbling-Leclerc1, Marie Falampin2,3, Abdelkader Heddar4
1Genome Integrity and Cancer, CNRS UMR9019, Université Paris-Saclay, Gustave Roussy, 94805 Villejuif, France.
International journal of molecular sciences
|November 27, 2024
概括
在BRCA1的基因突变导致孤立的卵巢储备减少 (DOR) 在一个年轻的患者. 这项研究揭示了BRCA1的存在.
科学领域:
- 遗传学 遗传学 是一个
- 生殖生物学 生殖生物学
- 基因组医学是基因组医学.
背景情况:
- 主要卵巢缺陷 (POI) 的原因越来越多地通过下一代测序 (NGS) 确定,但卵巢储备减少 (DOR) 的原因仍然不清楚.
- BRCA1基因突变与各种疾病有关,但它们在没有Fanconi贫血 (FA) 症状的孤立DOR中所起的作用尚未得到充分证实.
研究的目的:
- 用NGS和整个外基因组测序 (WES) 来确定一个14岁的患者中孤立的DOR的遗传原因.
- 研究确定的BRCA1突变对DNA损伤反应 (DDR) 和卵巢功能的功能影响.
主要方法:
- 使用下一代测序 (NGS) 和全外体测序 (WES) 来识别遗传变异.
- 逆转录PCR (RT-PCR) 和西斑分析被用于评估基因和蛋白质表达.
- 用基因毒剂进行了DNA损伤反应 (DDR) 研究.
主要成果:
- 在BRCA1基因 (c.470_471del和c.791_794del) 中发现了两个框架转移突变,被确定为孤立DOR.的原因.
- 患者表现出高染色体脆弱性,与FA一致,尽管缺乏其他临床症状.
- 生产了一种截断的BRCA1蛋白 (del11q),保留了部分DNA修复活性,这是正常早期DDR激活所表明的.
结论:
- 这是首次报告双基BRCA1突变导致孤立的卵巢功能障碍/人类不孕不育,而没有明显的FA症状.
- 这些发现强调了BRCA1在卵巢发育和功能中的关键作用,即使有剩余蛋白质活性.
- 在无法解释的DOR的遗传工作中,即使没有典型的FA临床特征,也应该考虑BRCA1突变.
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