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A Comprehensive Experimental Guide to Studying Cross-Presentation in Dendritic Cells In Vitro.

Barzan A Sadiq1, Ian Mantel1,2, J Magarian Blander1,2,3,4,5

  • 1The Jill Roberts Institute for Research in Inflammatory Bowel Disease, Weill Cornell Medicine, Cornell University, New York, New York.

Current Protocols in Immunology
|December 14, 2020
PubMed
Summary
This summary is machine-generated.

This study details methods for culturing and expanding dendritic cells (DCs) for studying cross-presentation. It provides protocols to assess DC cross-presentation capabilities and activate CD8+ T cells, crucial for adaptive immunity.

Keywords:
CD8+ T cellDCMHC-Icross-presentationcross-primingdendritic cells

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Area of Science:

  • Immunology
  • Cell Biology
  • T cell Activation

Background:

  • Cross-presentation, the process by which exogenous antigens are presented on MHC-I molecules, is critical for initiating CD8+ T cell responses.
  • Dendritic cells (DCs) are potent antigen-presenting cells (APCs) specialized in cross-presentation, but their limited numbers pose experimental challenges.
  • Understanding and optimizing methods to study DC cross-presentation is vital for advancing immunology and developing novel immunotherapies.

Purpose of the Study:

  • To provide detailed protocols for in vitro dendritic cell culture from bone marrow progenitors.
  • To describe methods for expanding dendritic cells in vivo for enhanced experimental accessibility.
  • To outline techniques for assessing dendritic cell cross-presentation capacity using CD8+ T cell activation.

Main Methods:

  • Isolation of bone marrow progenitor cells and subsequent in vitro differentiation of dendritic cells using GM-CSF or Flt3L.
  • In vivo expansion of conventional type 1 dendritic cells (cDC1s) for ex vivo analysis.
  • Assessment of dendritic cell cross-presentation via CD8+ T cell activation assays, including immunocytochemistry and CFSE labeling.

Main Results:

  • Established robust protocols for generating sufficient numbers of dendritic cells for cross-presentation studies.
  • Demonstrated methods for in vivo expansion of dendritic cells, overcoming limitations of low endogenous cell numbers.
  • Validated assays for measuring dendritic cell cross-presentation function through CD8+ T cell activation.

Conclusions:

  • The described methods provide a comprehensive toolkit for researchers to study dendritic cell cross-presentation.
  • These protocols facilitate the investigation of dendritic cell biology and the development of T cell-mediated immunotherapies.
  • The study enhances the ability to analyze the critical process of cross-presentation in adaptive immunity.