杜基因酶DUBA是T细胞中介质素-17产生的一种后翻译制动剂
Sascha Rutz1, Nobuhiko Kayagaki2, Qui T Phung3
1Department of Immunology, Genentech, 1 DNA Way, South San Francisco, California 94080, USA.
Nature
|December 4, 2014
概括
双双化酶DUBA抑制了T-辅助17 (TH17) 细胞对IL-17A (IL-17A) 的产生. 缺乏DUBA的T细胞显示自身免疫性炎症恶化,确定DUBA是关键的调节剂.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 辅助T细胞17 (TH17) 和它们的细胞因子产物,包括17A (IL-17A),是自身免疫性疾病发病的核心.
- 虽然像RORγt这样的转录因子调节TH17的分化,但控制IL-17A产生的翻译后修饰仍然不太了解.
研究的目的:
- 调查二基化酶DUBA在T细胞IL-17A产生调节中的作用.
- 阐明DUBA控制IL-17A表达的分子机制及其对自身免疫反应的影响.
主要方法:
- 利用带有DUBA缺乏T细胞的小鼠模型来评估炎症.
- 研究了DUBA和全方位联酶UBR5.5之间的蛋白质-蛋白质相互作用.
- 分析了RORγt在TGF-β信号的响应中由UBR5调解的RORγt的无处不在.
主要成果:
- 在T细胞中缺乏DUBA的小鼠在抗CD3抗体挑战后表现出恶化的小肠炎症.
- 发现DUBA与全方位联酶UBR5相互作用,这种联酶通常会抑制T细胞中DUBA的水平.
- 在激活的T细胞中DUBA的积累导致了UBR5的稳定,导致在TGF-β信号条件下RORγt无处不在.
结论:
- 杜巴作为T细胞IL-17A产生的关键细胞内在的负调节剂.
- DUBA的机制涉及与UBR5相互作用以控制RORγt无处不在,从而调节TH17介导的炎症.
- 这些发现凸显了DUBA作为TH17细胞驱动的自身免疫疾病的潜在治疗点.
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