Metabolic Regulation of CD8 T Cell Memory Development

CD8 T 细胞记忆发育的代谢调节

• 批准号: 8650256
• 负责人: Erika L Pearce
• 金额: $ 38万
• 依托单位: WASHINGTON UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-11-01 至 2016-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8650256
• 关键词: 5' -AMP-activated protein kinase; Address; Antigens; Bacterial Antigens; Bacterial Infections; Biochemical; CD8B1 gene; Catabolic Process; Catabolism; Cells; Cellular Immunity; Chronic; Citric Acid Cycle; Communicable Diseases; Data; Defect; Development; Disease; FDA approved; Failure; Family; Generations; Genes; Genetic; Goals; Immune response; Immunity; Immunologic Memory; Immunotherapy; Infection; Interleukin-1; Journals; Life; Link; Lipids; Maintenance; Malignant Neoplasms; Memory; Metabolic; Metabolism; Metformin; Mitochondria; Molecular; Mus; Nature; Pathway interactions; Pharmaceutical Preparations; Phase; Play; Population; Process; Public Health; Publishing; Regulation; Role; Signal Transduction; Sirolimus; T cell response; T memory cell; T-Cell Development; T-Lymphocyte; Testing; Therapeutic; Time; Tumor Necrosis Factor Receptor; Vaccination; adapter protein; base; fatty acid metabolism; fatty acid oxidation; gain of function; improved; in vivo; instrumentation; loss of function; mouse model; novel; pathogen; programs; public health relevance; research study; response; tool; vaccine efficacy

DESCRIPTION (provided by applicant): Immunological memory is the basis of vaccination, which may be the most significant public health tool available today. CD8 T cells play a crucial role in immunity to infections with intracellular pathogens. Upon stimulation, these T cells undergo a developmental program characterized by distinct phases encompassing first the expansion, and then contraction, of antigen-specific effector T cell populations, followed by the persistence of long-lived memory T cells that mediate immunity to re-infection. The mechanisms underlying the generation and maintenance of memory CD8 T cells remain unclear. Previously we demonstrated that mice lacking Traf6 (a TNFR and IL-1/TLR family adapter protein) in T cells mount effector CD8 T cell responses to infection, but are unable to establish memory CD8 T cells. Our experiments revealed that this CD8 T cell intrinsic failure of memory development was tightly linked to the inability of Traf6-deficient CD8 T cells to initiate mitochondrial fatty acid oxidation, a pathway of lipid catabolism that fuels the TCA cycle. Based on our observations, and a panel of supportive preliminary data, we hypothesize that catabolic processes of energy generation are essential for the development of memory CD8 T cells after infection and that Traf6 plays a key role regulating this process. We will test this hypothesis through the following specific aims: 1) Determine how fatty acid metabolism regulates memory CD8 T cell development; 2) Determine the extent of Traf6-dependent regulation of memory CD8 T cell development; and 3) Establish that pharmacological manipulation of CD8 T cell metabolism can be therapeutic. The long-term goal of these studies is to facilitate the development of immunotherapies against infectious diseases.

描述（由申请人提供）：免疫记忆是疫苗接种的基础，这可能是当今可用的最重要的公共卫生工具。 CD8 T细胞在对细胞内病原体感染的免疫中起着至关重要的作用。刺激后，这些T细胞经历了一个发育程序，其特征是不同的阶段，首先包含抗原特异性效应T细胞群体的扩张，然后是收缩，然后是介导免疫力再感染的长寿命记忆T细胞的持续性。记忆CD8 T细胞生成和维护的基础机制尚不清楚。以前，我们证明了缺乏TRAF6（TNFR和IL-1/TLR家族衔接蛋白）的小鼠在T细胞固定效应子CD8 T细胞对感染的反应，但无法建立内存CD8 T细胞。我们的实验表明，这种CD8 T细胞的记忆发育的固有失败与Traf6缺陷型CD8 T细胞无法启动线粒体脂肪酸氧化，这是脂质分解代谢的途径，从而燃料TCA循环。根据我们的观察结果和支持性的初步数据，我们假设能量产生的分解代谢过程对于感染后的记忆CD8 T细胞的发展至关重要，并且TRAF6在调节此过程的关键作用中起着关键作用。我们将通过以下特定目的检验这一假设：1）确定脂肪酸代谢如何调节记忆CD8 T细胞发育； 2）确定记忆CD8 T细胞发育的TRAF6依赖性调节的程度； 3）确定CD8 T细胞代谢的药理操作可以治疗。这些研究的长期目标是促进针对传染病的免疫疗法的发展。