Listeria Epitopes TCR Transgenics Antigen Sensitivity and Early Signaling

在过去的30年左右，T细胞对“模型”抗原的反应的深入研究已经产生了大量的结果。 深入了解T细胞生物学和功能，特别是当它涉及到特定的肽-MHC的识别 复合物通过T细胞受体抗原。 与该项目特别相关的是，现在有很好的证据表明，成熟的T细胞母细胞对 即使是单个分子的激动剂（肽-MHC）配体，这种非凡的敏感性至少在 通过特定的内源性肽-MHC复合物与免疫球蛋白的结合而实现的飞镖。 激动剂触发TCR二聚化。我们现在希望将这些研究扩展到CD 4和CDS的分析。 李斯特菌感染过程中不同时间和不同发育阶段的T细胞反应性 单核细胞增多症感染小鼠。 我们特别希望检验这样一个假设，即在李斯特菌感染过程中占优势的T细胞， 这是因为它们具有优良的上级信号特性。 这些研究将涉及制备一系列对李斯特菌LLO表位具有特异性的CD 4转基因物， 检测这些转基因细胞的敏感性和保护能力。该项目将涉及 高度定量的实验数据和最先进的建模技术之间的密切联系。

In the past 30 years or so, intensive work on T cell responses to 'model' antigens has resulted in a great deal of insight into T cell biology and function, particularly as it relates to the recognition of specific peptide-MHC complexes through the T cell receptor for antigen. Of particular relevance to this project, there is now good evidence that mature T cell blasts are sensitive to even a single molecule of an agonist (peptide-MHC) ligand and that this extraordinary sensitivity is at least in Dart achieved by the engagement of particular endogenous peptide-MHC complexes together with the agonist in triggering TCR dimerization. We now wish to extend these studies to the analysis of CD4 and CDS T cell responsiveness as different times and with different developmental stages of T cells during Listeria monocytogenes infection in mice. We particularly wish to test the hypothesis that T cells which emerge as dominant during Listeria infection do so because they have superior signaling properties. These studies will involve making a series of CD4transgenics specific for a Listeria LLO epitope and assaying these transgenic cells for sensitivity and ability to be protective throughout. This project will involve the close interfacing between highly quantitative experimental data and state of the art modeling techniques.