在C3中补充基因的罕见变异 淋巴细胞病变和免疫球蛋白介导的膜增殖性GN
Marie Sophie Meuleman1, Paula Vieira-Martins2, Carine El Sissy1,2
1Team "Inflammation, Complement and Cancer," INSERM UMRS1138, Centre de Recherche des Cordeliers, Paris, France.
Clinical journal of the American Society of Nephrology : CJASN
|August 24, 2023
概括
补充基因CFH,CFI和C3中的罕见遗传变异与C3球球病和Ig-MPGN有关. 这些变异与更高的衰竭和移植复发风险有关.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 遗传学 是一个遗传学.
- 补充系统生物学 补充系统生物学
背景情况:
- C3型血小板病 (C3G) 和异常免疫球蛋白介导膜增殖性GN (Ig-MPGN) 是由补体系统调节失调驱动的罕见脏疾病.
- 遗传形式的C3G/Ig-MPGN很少被记录,这突出了理解遗传贡献的差距.
- 识别遗传基础对于诊断和管理这些罕见的球细胞疾病至关重要.
研究的目的:
- 研究C3G和Ig-MPGN患者队列中的补充基因 (CFH,CFI,C3) 罕见遗传变异的流行率和影响.
- 分析已识别的变体与临床表现,免疫学发现和结局之间的关联.
- 确定致病变体的频率及其与H因子或I因子缺陷的相关性.
主要方法:
- 对398名患有C3G (n=296) 或Ig-MPGN (n=102) 的患者进行查,以寻找CFH,CFI和C3基因中的罕见变异 (MAF<0.1%).
- 在诊断时追溯收集流行病学,临床,免疫学和结局数据.
- 基于致病性和评估H/I因子水平的鉴定变异的分类.
主要成果:
- 在17% (66/398) 的患者中发现了CFH,CFI或C3的罕见变异,发现了53种不同的变异.
- 在72%的变体中发现了致病变体,通常会影响H或I因子的调节.
- 与没有变异的患者相比,患有罕见变异的患者的存率显著降低,衰竭率更高,移植后常见的移植复发.
结论:
- 大约17%的C3G/Ig-MPGN病例与关键补充基因 (CFH,CFI,C3) 的罕见变异有关.
- 在这些变体患者中,H因子或I因子的定量缺乏是常见的发现.
- 在这些补充基因中存在罕见的遗传变异是不良结局的重要预测因素.
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