第八因子基因解释了A型血友病的所有病例
J A Naylor1, P M Green, C R Rizza
1Division of Medical & Molecular Genetics, United Medical School, Guy's Hospital, London, UK.
Lancet (London, England)
|October 31, 1992
概括
新的mRNA分析揭示了在严重的血友病A.A.中以前未被检测到的22个内核突变. 这一发现解释了为什么一些导致严重疾病的第八因子基因突变以前在患者中错过了.
科学领域:
- 分子遗传学 分子遗传学
- 血液学 血液学 血液学
- 遗传医学是一种遗传医学.
背景情况:
- 严重的血友病A通常是由因子VIII基因的突变引起的.
- 对第八因子基因促进体,外子和内子边界的标准遗传分析未能检测出约50%的导致严重疾病的突变.
- 这种诊断差距的根本原因仍然不清楚.
研究的目的:
- 调查严重血友病A.A.未被检测到的突变的原因.
- 为了解释遗传发现和疾病严重程度之间的差异.
- 在因子VIII基因中识别新型突变部位.
主要方法:
- 利用基于mRNA的测序方法来分析第八因子基因突变.
- 检查了Intron 22的区域,这些区域以前没有被纳入标准分析.
- 与严重受影响患者的临床数据相关联的遗传发现.
主要成果:
- 在以前未被研究的22号内的区域内发现了一组突变.
- 这些突变扰乱了因子VIIImRNA中22和23的正确结合.
- 这些以前未被检测到的突变在24名严重受影响的英国患者中有10名 (41.7%) 发现.
结论:
- 第八因子基因22号内突变是严重血友病A的重要原因.
- 这种基于mRNA的方法成功地发现了传统遗传测试所遗漏的突变.
- 这项研究揭示了严重血友病A的诊断缺口的一个关键原因.
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