一个零星的原发性免疫缺陷队列的全基因组测序
James E D Thaventhiran1,2,3, Hana Lango Allen4,5,6,7, Oliver S Burren8,9
1Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, Cambridge Biomedical Campus, Cambridge, UK. jedt2@cam.ac.uk.
Nature
|June 6, 2020
概括
在原发性免疫缺陷 (PID) 患者中,全基因组测序发现了新的遗传原因,并揭示了罕见和常见变异之间的相互作用. 这有助于对PID的诊断和免疫失调的理解.
科学领域:
- 人类遗传学
- 免疫学
- 基因组医学
背景情况:
- 主要免疫缺陷 (PID) 存在诊断和治疗方面的挑战,通常在成年人发病,症状多样化,偶尔出现不清楚的遗传基础.
- 大多数PID患者在成年时出现免疫失调,包括自身免疫,过敏和癌症风险增加,使遗传诊断复杂化.
研究的目的:
- 通过全基因组测序,提高对导致原发性免疫缺陷 (PID) 的遗传因素的诊断产量和理解.
- 研究编码和非编码区域以及常见和罕见变异在PID病变中的作用.
主要方法:
- 全基因组测序在1,318名原发性免疫缺陷 (PID) 参与者中进行.
- 分析包括编码区域 (在886个指数病例中),以使用贝叶斯方法 (BeviMed) 识别已知的PID基因和新候选基因的突变.
- 非编码基因组分析确定了调节性删除,全基因组关联研究 (GWAS) 探索了常见变体关联和与罕见变体的相互作用.
主要成果:
- 在已知单一性PID基因中发现致病突变的患者数量为10. 3%.
- 在非编码区域中发现了新的候选PID相关基因,包括IVNS1ABP.
- 发现了高透率单基变体和常见变体 (例如,在PTPN2,SOCS1位点) 之间的相互作用证据,解释了PID可变的透率和复杂性.
结论:
- 基于队列的全基因组测序显著增加了原发性免疫缺陷 (PID) 的诊断产量.
- 这种方法加深了对PID遗传结构的理解,包括非编码变体和基因相互作用的贡献.
- 这些发现揭示了影响人类免疫反应的途径,并突出了PID复杂的遗传基础.
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