罕见的致病性结构变体显示出增强非洲男性前列腺癌生殖基因检测的潜力
Vanessa Hayes1, Tingting Gong2, Jue Jiang3
1University of Sydney.
Research square
|July 1, 2024
概括
前列腺癌 (PCa) 的结构变异 (SVs) 对非洲男性的影响不成比例. 这项研究在非洲患者中确定了潜在的致病性SVs,突出了这一高风险组的基因组数据和测试指南的差异.
科学领域:
- 基因组学就是基因组学.
- 癌症研究 癌症研究
- 人口遗传学 人口遗传学
背景情况:
- 前列腺癌 (PCa) 具有显著的遗传性,非洲血统的男性面临更高的风险和致命性.
- 目前的生殖基因测试指南往往排除非洲男性,因为在基因组数据库中代表性不足.
- 结构变异 (SVs) 被认为是导致人类疾病的原因,包括前列腺癌,但它们在家庭和治疗环境中的作用往往被低估.
研究的目的:
- 调查生殖线结构变异 (SVs) 在前列腺癌 (PCa) 致病性中的作用.
- 为了比较非洲和欧洲PCa患者中SVs的流行率和潜在病原性.
- 评估这些发现对当前生殖线检测指南的影响,并解决健康差异.
主要方法:
- 非洲 (n=113) 和欧洲 (n=57) PCa患者的临床方法匹配队列的深度测序.
- 在使用病原性预测工作流程对42,966名高质量的生殖系SV进行审讯.
- 识别和分析潜在的致病性SVs,包括关键基因的功能丧失变体.
主要成果:
- 确定了15种潜在的致病性SVs,在12.4%的非洲患者和7.0%的欧洲患者中检测到.
- 虽然在非洲患者中发现的SV的72%符合标准护理测试建议,但在欧洲患者中,86%的SV符合标准护理测试建议.
- 值得注意的非洲特异性功能丧失基因候选人包括MLH1,BARD1,FOXP1,WASF1和RB1.1.
结论:
- 罕见的大型基因组变异 (千克至兆基) 显著促进PCa的致病性,特别是在非洲人群中.
- 非洲祖先在基因组研究中的代表性不足导致了基因测试和PCa理解方面的差异.
- 这项研究强调了扩大基因组数据库和完善测试指南的必要性,以解决与非洲相关的前列腺癌差异.
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