T cell fate decisions and transplant outcomes

T 细胞命运决定和移植结果

基本信息

  • 批准号:
    10077820
  • 负责人:
  • 金额:
    $ 40.38万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
  • 财政年份:
    2018
  • 资助国家:
    美国
  • 起止时间:
    2018-01-10 至 2022-12-31
  • 项目状态:
    已结题

项目摘要

Project Summary Rejection remains a major hurdle to long-lasting transplant survival. From a clinical standpoint current immunosuppression protocols are fantastic in short-term transplant survival, but do little in promoting long- term graft outcomes. Thus, there is a pressing need to uncover effector programs that may emerge under broad immunosuppressive conditions that can mediate graft loss, with a goal of further improving long term transplant outcomes. We recently discovered that unlike other Th subsets, Th9 cells are robustly induced in an immunosuppressive milieu, suggesting that Th9 cells may be especially relevant to graft loss under conditions of immunosuppression. Th9 cells are induced in massive numbers when the default Th1/Th2 programs are inhibited and require the formation of super-enhancers at Il9 locus (not lineage specific transcription factors). Importantly, formation of Il9 super-enhancers requires OX40 signaling. Also, OX40 is remarkably potent in redirecting Foxp3+ Tregs to inflammatory Th9 cells. Based on the unexpected potency of OX40 in robust Th9 induction, as well as the unexpected mode of actions of OX40 stimulation, we propose to test a unifying hypothesis in this proposal, namely- suppression of the default T cell programs in an immunosuppressive milieu allows OX40 to promote alternative Th9 programs in triggering rejection of otherwise tolerant grafts. We propose 3 Aims in this proposal. Aim 1 focuses on identifying novel mechanisms by which OX40 promotes massive Th9 cells, examining formation, structure, and activities of super-enhancers at Il9 locus. Aim 2 investigates how OX40 redirects Foxp3+ Tregs to Th9 cells, focusing on the newly identified Foxp3 repressors in shutting down Foxp3 expression and examine whether Foxp3 may disrupt IL-9 super enhancer formations. Aim 3 examines the impact of Th9 cells in transplant survival, testing whether targeting super-enhancers or checkpoints in Th9 induction enables robust allograft tolerance. We believe that the proposed studies will unravel new mechanisms of tolerance resistance in transplant recipients, and findings from these studies will have broad impacts on other immune-mediated diseases as well, including cancer immunotherapies and autoimmune diseases.
项目总结

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

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Xian Chang Li其他文献

An update on regulatory T cells in transplant tolerance and rejection
移植耐受与排斥中调节性 T 细胞的最新进展
  • DOI:
    10.1038/nrneph.2010.101
  • 发表时间:
    2010-08-03
  • 期刊:
  • 影响因子:
    39.800
  • 作者:
    Xian Chang Li;Laurence A. Turka
  • 通讯作者:
    Laurence A. Turka
Vascularized Composite Allotransplantation Research: The Emerging Field
血管化复合同种异体移植研究:新兴领域
  • DOI:
  • 发表时间:
    2012
  • 期刊:
  • 影响因子:
    8.8
  • 作者:
    Bohdan Pomahac;Yolanda T. Becker;L. Cendales;S. Ildstad;Xian Chang Li;S. Schneeberger;M. Siemionow;A. Thomson;Xin Xiao Zheng;Stefan G. Tullius
  • 通讯作者:
    Stefan G. Tullius
IL-2 receptor-targeted cytolytic IL-2/Fc fusion protein treatment blocks diabetogenic autoimmunity in nonobese diabetic mice.
IL-2 受体靶向细胞溶解性 IL-2/Fc 融合蛋白治疗可阻断非肥胖糖尿病小鼠的糖尿病性自身免疫。
  • DOI:
  • 发表时间:
    1999
  • 期刊:
  • 影响因子:
    4.4
  • 作者:
    X. Zheng;A. Steele;Wayne W. Hancock;Kensaku Kawamoto;Xian Chang Li;Peter W. Nickerson;Yongsheng Li;Yan Tian;Terry B. Strom
  • 通讯作者:
    Terry B. Strom
Facile synthesis of rare earth ions doped LiSrsub4/sub(BNsub2/sub)sub3/sub phosphors for white light-emitting diodes
用于白光发光二极管的稀土离子掺杂的 LiSr₄(BN₂)₃ 荧光粉的简便合成
  • DOI:
    10.1016/j.jallcom.2024.175052
  • 发表时间:
    2024-09-15
  • 期刊:
  • 影响因子:
    6.300
  • 作者:
    Wenqin Luo;Yongya Wang;Xian Chang Li;Haiyan Wu
  • 通讯作者:
    Haiyan Wu
Blood monocyte migration to acute lung inflammation involves both CD11/CD18 and very late activation antigen-4-dependent and independent pathways.
血液单核细胞向急性肺部炎症的迁移涉及 CD11/CD18 和非常晚期激活抗原 4 依赖性和独立途径。
  • DOI:
  • 发表时间:
    1998
  • 期刊:
  • 影响因子:
    4.4
  • 作者:
    Xian Chang Li;Masayuki Miyasaka;T. Issekutz
  • 通讯作者:
    T. Issekutz

Xian Chang Li的其他文献

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{{ truncateString('Xian Chang Li', 18)}}的其他基金

T cell fate decisions and transplant outcomes
T 细胞命运决定和移植结果
  • 批准号:
    10318164
  • 财政年份:
    2018
  • 资助金额:
    $ 40.38万
  • 项目类别:
Control of Treg exhaustion by OX40
OX40 控制 Treg 耗竭
  • 批准号:
    8694416
  • 财政年份:
    2014
  • 资助金额:
    $ 40.38万
  • 项目类别:
Control of dysfunctional Tregs
控制功能失调的 Tregs
  • 批准号:
    10217440
  • 财政年份:
    2014
  • 资助金额:
    $ 40.38万
  • 项目类别:
Control of dysfunctional Tregs
控制功能失调的 Tregs
  • 批准号:
    10552603
  • 财政年份:
    2014
  • 资助金额:
    $ 40.38万
  • 项目类别:
Control of Treg exhaustion by OX40
OX40 控制 Treg 耗竭
  • 批准号:
    8996117
  • 财政年份:
    2014
  • 资助金额:
    $ 40.38万
  • 项目类别:
Control of dysfunctional Tregs
控制功能失调的 Tregs
  • 批准号:
    10335230
  • 财政年份:
    2014
  • 资助金额:
    $ 40.38万
  • 项目类别:
Control of Treg exhaustion by OX40
OX40 控制 Treg 耗竭
  • 批准号:
    8707631
  • 财政年份:
    2013
  • 资助金额:
    $ 40.38万
  • 项目类别:
Modulation of innate immune cells to create transplant tolerance
调节先天免疫细胞以产生移植耐受
  • 批准号:
    8078381
  • 财政年份:
    2011
  • 资助金额:
    $ 40.38万
  • 项目类别:
Modulation of innate immune cells to create transplant tolerance
调节先天免疫细胞以产生移植耐受
  • 批准号:
    8232053
  • 财政年份:
    2011
  • 资助金额:
    $ 40.38万
  • 项目类别:
Modulation of innate immune cells to create transplant tolerance
调节先天免疫细胞以产生移植耐受
  • 批准号:
    8628733
  • 财政年份:
    2011
  • 资助金额:
    $ 40.38万
  • 项目类别:

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