通过转录网络分析,识别控制致病性CD4+ T细胞在炎症性肠病中的命运的主调节基因
José M Jiménez1, J Sebastián Contreras-Riquelme2, Pía M Vidal3
1Centro Científico y Tecnológico de Excelencia Ciencia & Vida, Fundación Ciencia & Vida, Avenida Del Valle Norte #725, 8580702, Huechuraba, Santiago, Chile.
研究人员确定了关键的转录调节器,Lef1和Mybl2,在炎症性肠病 (IBD) 动物模型中驱动致病因子 CD4+ T 细胞行为. 这些发现为IBD治疗提供了潜在的新治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 分子生物学分子生物学
背景情况:
- 炎症性肠道疾病 (IBD) 涉及由免疫失调驱动的慢性胃肠道炎症.
- 效应体和调节性CD4+T细胞对于免疫平衡至关重要,但它们在IBD病原发生中的作用尚未完全理解.
- 控制IBD病原性T辅助细胞行为的特定转录程序在很大程度上是未知的.
研究的目的:
- 在IBD模型中,确定控制在肠道炎症期间效应体CD4+T细胞的致病行为的主转录调节剂.
- 阐明IBD中T细胞介导病理背后的分子机制.
主要方法:
- 利用一种通过将天真的CD4+T细胞转移到淋巴细胞缺乏Rag1-/-小鼠中的IBD诱导的小鼠模型.
- 在从炎症小鼠结肠和脏中分离出的CD4+T细胞上进行了大量RNA测序.
- 构建基因调节网络,以从差异表达的基因中识别主调节者.
主要成果:
- 鉴定了532个在结肠和30个在脏中差异表达的基因,主要与Th1反应和白细胞迁移有关.
- 发现了四个上调主调节器 (Lef1,Dnmt1,Mybl2,Jup) 和一个下调主调节器 (Foxo3).
- 通过qRT-PCR验证了Lef1和Mybl2的更新调节,表明它们在IBD病变发生过程中的关键作用.
结论:
- Lef1和Mybl2被确定为关键的主调节体,与IBD中的致病因子CD4+T细胞行为有关.
- 这两种基因代表了开发未来IBD治疗的潜在新分子标.
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