在全身性红斑狼中高通量识别功能调节性SNP
Qiang Wang1, Taehyeung Kim1, Marta Martínez-Bonet2,3
1Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.
Nature communications
|August 9, 2024
概括
研究人员确定了影响系统性红斑狼 (SLE) 风险的关键非编码基因变异. 一种特定的变异 (rs2297550) 通过Ikaros转录因子影响IKBKE基因表达,为SLE病变产生提供了新的见解.
科学领域:
- 遗传学 是一个遗传学.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 全基因组关联研究 (GWAS) 已经确定了与系统性红斑狼 (SLE) 风险相关的众多遗传位置.
- 然而,大多数已识别的风险基因缺乏外来变异,突出显示了为全面了解SLE遗传学而识别功能性非编码变异的关键需求.
研究的目的:
- 在已知的SLE风险位置内系统地识别和功能性地表征非编码单核酸多态 (SNP).
- 阐明这些非编码变异对SLE病原发生有所贡献的分子机制.
主要方法:
- 利用SNP-seq和生物信息丰富来选来自87个SLE风险位的2180个SNP,以检测B细胞中的转录因子结合位.
- 通过电泳运动移动转移试验 (EMSA) 和光酶记者试验验验证了候选SNP.
- 顶级候选SNP的详细功能分析,rs2297550,包括评估转录因子结合和原始细胞中的基因表达调节.
主要成果:
- 确定了52个候选非编码SNP,在SLE风险区域具有潜在的监管作用.
- 证明了rs2297550的SLE风险等位基因增强了与转录因子Ikaros (编码由IKZF1) 的结合.
- 表明rs2297550风险等位基因调节IKBKE的表达,导致携带风险等位基因的个体的原发细胞中干扰素/NF-κB调节剂IKKε水平增加.
结论:
- 定义了一组可能的功能性非编码性SLE风险变体.
- 确定了一种涉及rs2297550,Ikaros和IKKε的新型调节途径,该途径与人类遗传学有关于SLE风险.
- 这些发现为SLE的遗传基础提供了关键的见解,并建议潜在的治疗点.
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