CD8 Tau cell contraction and memory formation

免疫系统的适应性分支由B和T淋巴细胞组成。CD8 T细胞是关键 介导免疫细胞内病原体和肿瘤的参与者。CD8 T细胞遇到抗原， MHC I类的背景被激活并启动增殖和分化程序， 效应细胞毒性T淋巴细胞（CTL）。通常，在对急性病毒感染的应答中，初始CD8 T细胞 可以在6天内经历超过15次分裂以产生数千个效应子后代。巅峰的 这种应答也称为初级应答，抗原通常被清除， 超过90%的效应CDS T细胞死亡。这个过程称为收缩， T细胞的一部分，作为长寿的记忆细胞持续存在。除了寿命长，记忆细胞 其特征还在于它们能够以增强的效力对相同抗原的再攻击作出应答 （二次响应）。这些特征，加上它们数量的增加，允许记忆CD8+ T细胞提供 对以前遇到的病原体有效持久的免疫力。 虽然许多已建立的疫苗接种计划主要依赖于有效的抗体应答， 疟疾、艾滋病毒和结核病等当前挑战似乎需要采取不同的办法。CDS T 细胞是保护我们免受细胞内病原体（如病毒或某些细胞内病原体）侵害的关键参与者。 细菌）。深入了解CDS T细胞记忆是如何产生和维持的，将为我们提供 更深入的了解和更好的疫苗接种策略。 我们希望将我们的研究集中在CDS T细胞反应中知之甚少的收缩部分。 我的研究的广泛目标是了解CDS T细胞是如何从效应细胞转变为免疫细胞的。 调节记忆阶段以及如何产生合适的记忆T细胞池。更具体的目标是 未来两年的任务是阐明控制收缩阶段某些方面的机制， CDS T细胞反应的随后记忆阶段。

The adaptive branch of the immune system consists of B and T lymphocytes. CD8 T cells are key players in mediating immunity to Intracellular pathogens and tumors. CDS T cells that encounter antigen in the context of MHC class I become activated and initiate a program of proliferation and differentiation into effector cytotoxic T lymphocytes (CTL). Typically, in response to an acute viral infection, a naive CDS T cell may go through more than 15 divisions in 6 days to generate thousands of effector progeny. At the peak of this response, also called the primary response, antigen has typically been cleared and in the following days more than 90% of the effector CDS T cells die. This process called contraction leaves behind a surviving fraction of T cells that persists as long-lived memory cells. Apart from their longevity, memory cells are further characterized by their ability to respond with enhanced efficacy to rechallenge with the same antigen (secondary response). These features, plus their increased numbers, allow memory CD8+ T cell to provide efficient long lasting immunity against previously encountered pathogens. While many established vaccination programs are mainly dependent on an efficient antibody response, cun^ent challenges such as malaria, HIV and tuberculosis appear to require a different approach. CDS T cells are a key player protecting us against intracellular pathogens (such as viruses or certain intracellular bacteria). A thorough understanding of how CDS T cell memory is generated and maintained will provide us with more insight and better vaccination strategies. We want to focus our research on the poorly understood contraction part of the CDS T cell response. The broad goal of my research is to understand how the transition of CDS T cells from the effector to the memory stage is regulated and how a fit memory T cell pool is generated. The more specific goal for the next two years is to shed light on the mechanisms that control certain aspects of the contraction phase and the ensuing memory phase of the CDS T cell response.