在SLC15A4中的一个非编码变体调节了增强器活动和与狼易感性相关的溶酶体脱酸
Manish Kumar Singh1, Guru Prashad Maiti1, HariKrishna Reddy-Rallabandi1
1Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City OK, USA.
概括
一种特定的基因变异rs35907548,靠近SLC15A4基因可能会增加对系统性红斑狼 (SLE) 的敏感性. 这种风险等位基因改变了基因调节和细胞功能,可能有助于SLE发展.
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:
- 系统性红斑狼 (SLE) 是一种自身免疫性疾病,具有重要的遗传成分.
- 在SLC15A4基因附近的几个单核酸多态 (SNP) 与SLE有关,但因果变异和机制仍然不清楚.
研究的目的:
- 为了确定SLC15A4相关的SLE易感性背后的功能遗传变异和分子机制.
- 为了研究指定变异在基因表达和细胞功能中的调控作用.
主要方法:
- 生物信息学分析,表达量化特征位点 (eQTLs) 和3D染色体相互作用分析 (3C-qPCR).
- 路西法酶记者测定,染色体免疫沉 (ChIP-qPCR) 和CRISPR/Cas9基因编辑.
- 在编辑的细胞中分析了内分泌体pH调节.
主要成果:
- rs35907548被确定为SLC15A4.4的活性内基增强剂的可能功能变体.
- 风险等位基因T显示了等位基因特异性增强剂活性,增加了调控潜力和基因表达.
- 这种增强剂与SLC15A4,GLTLD1和未表征的lncRNA促进体相互作用.
- 克里斯普尔/卡斯9淘汰验证了增强剂-促进剂相互作用,并揭示了失调的内分泌体pH值.
结论:
- rs35907548风险等位基因影响基因调节和细胞生理学,可能有助于SLE的发病.
- 这项研究阐明了一种分子机制,将特定的遗传变异与SLE易感性联系起来.
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