Development of B cell memory in allergic asthma

过敏性哮喘中 B 细胞记忆的发展

• 批准号: 10642902
• 负责人: Yee Ling Wu
• 金额: $ 45.43万
• 依托单位: LOYOLA UNIVERSITY CHICAGO
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-06-15 至 2026-04-30
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10642902
• 关键词: Address; Affinity; Agonist; Airway Disease; Allergens; Allergic; Allergic inflammation; Anatomy; Antibodies; Antibody Affinity; Antibody Formation; Antibody Response; Antigens; B cell repertoire; B-Cell Antigen Receptor; B-Cell Development; B-Lymphocyte Subsets; B-Lymphocytes; Bacterial Infections; Biology; CCL20 gene; CCR6 gene; Cell Adhesion Molecules; Cells; Characteristics; Circulation; Development; Disease Progression; Effector Cell; Exposure to; Extrinsic asthma; Gene Expression Profile; Generations; Genetic Transcription; Goals; Heterogeneity; Homing; Human; IgE; IgG1; Immune response; Immunoglobulin Class Switching; Immunoglobulin G; Immunoglobulin M; Immunoglobulin-Secreting Cells; Immunologic Memory; Infection; Inflammation; Intercept; Lung; Lymphoid Tissue; Mediating; Memory B-Lymphocyte; Microscopy; Mucous Membrane; Mus; Output; Parabiosis; Pathogenicity; Patients; Phenotype; Plasma Cells; Population; Positioning Attribute; Prevalence; Production; Pulmonary Inflammation; Respiratory distress; Signal Transduction; Site; Spleen; Structure of germinal center of lymph node; Testing; Tissues; Virus Diseases; anti-CD20; chemokine receptor; chronic inflammatory disease; chronic inflammatory lung disease; constriction; experimental study; immune function; lymphoid organ; lymphoid structures; mouse model; novel therapeutic intervention; response; sensitizing antigen; trafficking; transcriptomics

Project Summary/Abstract Allergic asthma is a chronic inflammatory disease of the lungs without cure. Repetitive allergen exposure in the airway leads to the generation of pathogenic immune memory and the excessive production of allergen specific IgE antibodies that mediate inflammation, airway constriction and respiratory distress in patients with allergic asthma. Memory B cells are a key component of immune memory. The phenotypic and functional heterogeneity of MBCs affords their differential antibody responses as well as impact their trafficking, tissue retention and ability to disseminate systemically. In a mouse model of allergic lung inflammation, we have observed stable lung- localized MBCs and evidence for the generation of pathogenic antibody responses in sensitized lungs. We hypothesize that after local antigen sensitization, the lung acquires immune functions reminiscent of those in secondary lymphoid tissues, capable of maintaining long-lived memory B cells as well as generating new MBCs that can recirculate and disseminate in other tissues to mediate systemic allergic inflammation. In this study, we will 1) probe the development of memory B cells (MBCs) in allergic lungs including in-depth characterization of the critical MBC subset that contributes to allergen specific IgE response, and 2) how these MBCs disseminate systemically. We will also 3) explore strategies to intercept the systemic dissemination of pathogenic MBCs to halt the progression of allergic inflammation. These studies will advance our fundamental understanding of memory B cells as well as help devise new therapeutic strategies for allergic asthma.

项目摘要/摘要 过敏性哮喘是一种无法治愈的肺部慢性炎症性疾病。重复过敏原暴露 气道导致致病性免疫记忆产生和过敏原特异性产生 过敏患者的IgE抗体介导炎症，气道收缩和呼吸窘迫 哮喘。内存B细胞是免疫记忆的关键组成部分。表型和功能异质性 MBC的差异抗体反应以及影响其贩运，组织保留和能力 全身传播。在过敏性肺部炎症的小鼠模型中，我们观察到稳定的肺 局部MBC和敏化肺中致病性抗体反应产生的证据。我们 假设在局部抗原敏化后，肺部获得了免疫功能，让人联想到那些 次要淋巴组织，能够维持长寿命的记忆B细胞并产生新的MBC 可以在其他组织中再循环和传播以介导全身性过敏性炎症。在这项研究中，我们 会1）探测在过敏性肺中记忆B细胞（MBC）的发展，包括深入的表征 有助于过敏原IgE响应的关键MBC子集，以及2）这些MBC如何传播 全身。我们还将3）探索拦截致病MBC系统性传播到的策略 停止过敏性炎症的进展。这些研究将提高我们对 记忆B细胞以及为过敏性哮喘制定新的治疗策略。