Programming Durable Immune Responses To Vaccination

规划对疫苗接种的持久免疫反应

基本信息

  • 批准号:
    10319526
  • 负责人:
  • 金额:
    $ 66.76万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
  • 财政年份:
    2018
  • 资助国家:
    美国
  • 起止时间:
    2018-12-18 至 2023-11-30
  • 项目状态:
    已结题

项目摘要

ABSTRACT Influenza viruses cause up to 500,000 deaths around the globe annually. An ideal influenza vaccine must have two essential attributes: one, it should be capable of inducing broadly cross-reactive antibodies that can neutralize diverse influenza virus strains; and two, it must induce long-lived antibody responses to maintain protective immunity for extended periods. Licensed seasonal influenza virus vaccines do neither – the antibody response is of limited breadth and vaccine-induced immunity appears to be of short duration. Early work has established that induction of hemagglutinin (HA)-specific antibodies is essential and sufficient for protection. Despite the extensive efforts and resources that have been deployed to fight influenza over the past eight decades, it remains a major public health threat. There are major gaps in our understanding of memory B cell (MBC) responses to influenza virus vaccination in humans: (1) does influenza vaccination induce a GC reaction in the draining lymph node? (2) if yes, how robust is that response in comparison to those induced by vaccines that elicit more durable serum antibody responses? 3) are all peripheral MBCs that emerge after vaccination GC-derived? 4) if yes, what is the phenotype of GC-derived antigen-specific B cells that are destined to become LLPCs? 5) does influenza vaccination induces a sustained increase in the frequency of bone marrow-resident LLPCs? 6) is there a correlation between the frequency of antigen-specific GC B cells and the increase/maintenance in bone marrow LLPCs? Tackling these gaps will allow us to discern the cellular components that are associated with durable antibody responses following vaccination in humans. In our studies, we will address these outstanding questions through detailed phenotypic, functional and transcriptional analysis of influenza vaccination-induced, HA-specific B cell responses isolated not only from the easily accessible blood compartment, but also those isolated from the draining lymph nodes and the bone marrow compartments. Our preliminary data show that there are at least two distinct subsets of vaccine-induced B cell subsets that differ in the kinetics of their appearance in blood, isotype distribution, and differentiation potential. Additionally, our transcriptional analyses reveal differential expression of key transcription factors, such as TCF-1 that are associated broadly with isotype-switching and self-renewal capacity. Elucidating the origin and fate of influenza vaccines-induced B cell responses is unarguably a major public health need and our findings will potentially reveal the cellular and molecular determinants dictating not only the longevity, but also the breadth of elicited antibody responses to influenza – and potentially other – vaccination in humans.
摘要

项目成果

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Ali Hassan Ellebedy其他文献

Ali Hassan Ellebedy的其他文献

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{{ truncateString('Ali Hassan Ellebedy', 18)}}的其他基金

Antibody Core
抗体核心
  • 批准号:
    10549477
  • 财政年份:
    2023
  • 资助金额:
    $ 66.76万
  • 项目类别:
Programming Long-lasting Immunity to Coronaviruses (PLUTO)
对冠状病毒进行持久免疫编程 (PLUTO)
  • 批准号:
    10549475
  • 财政年份:
    2023
  • 资助金额:
    $ 66.76万
  • 项目类别:
Developing protective monoclonal antibodies against Gram- and Gram+ bacteria
开发针对革兰氏菌和革兰氏菌的保护性单克隆抗体
  • 批准号:
    10162826
  • 财政年份:
    2021
  • 资助金额:
    $ 66.76万
  • 项目类别:
Developing protective monoclonal antibodies against Gram- and Gram+ bacteria
开发针对革兰氏菌和革兰氏菌的保护性单克隆抗体
  • 批准号:
    10577803
  • 财政年份:
    2021
  • 资助金额:
    $ 66.76万
  • 项目类别:
Developing protective monoclonal antibodies against Gram- and Gram+ bacteria
开发针对革兰氏菌和革兰氏菌的保护性单克隆抗体
  • 批准号:
    10352467
  • 财政年份:
    2021
  • 资助金额:
    $ 66.76万
  • 项目类别:
Programming Durable Immune Responses To Vaccination
规划对疫苗接种的持久免疫反应
  • 批准号:
    10539283
  • 财政年份:
    2018
  • 资助金额:
    $ 66.76万
  • 项目类别:
Programming Durable Immune Responses To Vaccination
规划对疫苗接种的持久免疫反应
  • 批准号:
    10062811
  • 财政年份:
    2018
  • 资助金额:
    $ 66.76万
  • 项目类别:

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