Plasma Cell Priming

项目总结 自身反应性抗体产生的细胞和分子事件 对自身免疫的了解仍然很少。值得注意的是，边缘带(MZ)B细胞 富含自我反应的B细胞，并已知能产生抗体分泌血浆 与其他B细胞相比，细胞的速度异常快。这个R21项目的中心是 了解MZ B细胞产生血浆的分子机制 加速动力学的细胞，重点是定义细胞外信号和相关的 促进MZ B细胞分化的细胞内信号通路。中环 指导这项工作的假设是mTOR/mTORC1激酶，一种新兴的生物标记物 在狼疮和相关自身免疫性疾病中，夫妇BAFF受体信号和 表达相关浆细胞基因以促进抗体的快速诱导 综合。为了验证这一假设，我们将：1)定义mTOR/mTORC1信号的作用 在浆细胞启动中，2)探索驱动血浆的细胞外输入的身份 细胞原位引爆。这些研究将加强对潜在过程的了解 所有浆细胞的产生，包括那些分泌致病性自身反应的细胞 抗体。

Project summary The cellular and molecular events underlying the generation of self-reactive antibodies in autoimmunity remain poorly understood. Notably, marginal zone (MZ) B cells are enriched for self-reactive B cells, and are known to generate antibody-secreting plasma cells exceptionally quickly compared to other B cells. This R21 project centers on understanding the molecular mechanisms through which MZ B cells generate plasma cells with accelerated kinetics, with a focus on defining extracellular cues and associated intracellular signaling pathways that prime MZ B cells for differentiation. The central hypothesis guiding this work is that the mTOR/mTORC1 kinase, an emerging biomarker in lupus and related autoimmune diseases, couples BAFF-receptor signaling and expression of relevant plasma cell genes to facilitate rapid induction of antibody synthesis. To test this hypothesis we will: 1) Define the role of mTOR/mTORC1 signaling in plasma cell priming, and 2) Explore the identity of extracellular inputs driving plasma cell priming in situ. These studies will enhance knowledge of the processes underlying the generation of all plasma cells including those secreting pathogenic self-reactive antibodies.