Immune Regulation by Deubiquitination

项目摘要 我们的长期目标是研究免疫调节中的泛素系统。我们发起了一项 脱泛素酶CyLD的新研究发现T细胞CyLD缺乏 调节细胞(Treg)通过增加IL-4的产生而引起慢性肺部炎症。 这些初步研究指出了CyLD调节Tregs的新机制。 调节细胞因子的产生，并强调了潜在的组织特异性方面 Treg函数。最近，我们发现CyLD在细胞周期中起到了正向调节作用。 淋巴组织中Treg向T滤泡调节性T细胞的分化这些 因此，初步研究为检验我们的中心假设提供了坚实的基础 泛素化/去泛素化系统在免疫调节中起着关键作用 通过以组织上下文相关的方式调节不同的T细胞亚群。在这里我们 计划通过提出两个具体目标来验证这一假设：目标1，在 目的2，研究CyLD在TFR中的作用。预期的结果将是 极大地提高了我们对蛋白质去泛素化途径的基础知识 免疫调节，将为人类疾病的治疗干预提供线索。

Project Summary Our long-term goal is to study the ubiquitin system in immune regulation. We initiated a new study of the deubiquitinating enzyme CYLD and found that deficiency of CYLD in T regulatory cells (Treg) caused chronic lung inflammation by increasing IL-4 production. These preliminary studies pointed to new mechanisms of CYLD regulation of Tregs, via modulating the cytokine production, and highlighted potential tissue-specific aspects of Treg function. Recently, we found that CYLD acts as a positive regulator in the differentiation of Treg to T follicular regulatory T cells (Tfr) in lymphoid tissues. These preliminary studies thus provide us with a solid basis for testing our central hypothesis that the ubiquitination/deubiquitination system plays a critical role in immune regulation via modulating different T cell subsets in tissue context-dependent manner. Here we plan to test this hypothesis by proposing two Specific Aims: Aim 1, to study CYLD in Treg regulation; and Aim 2, to study the role of CYLD in Tfr. The expected results will significantly advance our basic knowledge on the protein deubiquitination pathway in immune regulation, and will provide clues to therapeutic intervention of human diseases.