含有1 (LACC1) 的Laccase域中的克罗恩病相关变体调节T细胞基因表达,代谢和T细胞功能
Yingcong Li1,2, Gabriel Ascui1,3, Martina Dicker1
1La Jolla Institute for Immunology, La Jolla, CA, USA.
Nature communications
|March 16, 2025
概括
靠近LACC1基因的遗传变异会影响其在T细胞中的表达,影响细胞代谢和功能. 这项研究揭示了将LACC1变体与克罗恩病 (CD) 和大肠炎联系在一起的机制.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 全基因组关联研究 (GWAS) 已经确定了克罗恩病 (CD) 的遗传风险位置,包括靠近LACC1基因的区域.
- 之前的发现表明该位点与T淋巴细胞中LACC1表达减少之间存在关联,但潜在的机制和功能后果仍然不清楚.
研究的目的:
- 阐明LACC1附近的遗传变异影响T细胞基因表达的机制.
- 调查改变LACC1表达对T细胞代谢和调控性T细胞分化的功能影响.
- 建立LACC1变体,T细胞功能障碍和炎症性肠病之间的联系.
主要方法:
- 在LACC1发起区域内的变异的识别和表征.
- 在来自异构体捐赠者的人类CD4+T细胞中对LACC1前mRNA的基因特异性表达分析.
- 基因编辑以验证促进体区域在LACC1表达中的功能作用.
- 评估代谢参数 (例如,氧气消耗率) 和LACC1-敲击T细胞中的调控性T细胞分化.
主要成果:
- 在LACC1促进区的特定变异被确定为LACC1转录的关键调节者.
- 疾病风险变异与人类CD4+T细胞中LACC1前mRNA水平降低直接相关.
- 在T细胞中,LACC1基因被淘汰导致细胞代谢发生显著变化,包括减少氧气消耗.
- 在人体CD4+T细胞中观察到调节性T细胞的体外分化受损,LACC1表达减少.
结论:
- 这项研究建立了一个功能机制,将特定的LACC1促进体变异与T细胞中LACC1表达的减少联系起来.
- 这些发现表明,改变LACC1表达会影响T细胞代谢和调节性T细胞功能.
- 这为LACC1变异与克罗恩病和结肠炎等炎症性疾病之间的关联提供了分子基础.
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