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Purification of the Membrane Compartment for Endoplasmic Reticulum-associated Degradation of Exogenous Antigens in Cross-presentation
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Purification of the Membrane Compartment for Endoplasmic Reticulum-associated Degradation of Exogenous Antigens in Cross-presentation

Published on: August 21, 2017

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Distinct Subcellular Compartments of Dendritic Cells Used for Cross-Presentation

Jun Imai1, Mayu Otani1, Takahiro Sakai1

  • 1Laboratory of Physiological Chemistry, Faculty of Pharmacy, Takasaki University of Health and Welfare, Takasaki, Gunma 370-0033, Japan.

International Journal of Molecular Sciences
|November 14, 2019
PubMed

Insights

Dendritic cells use cross-presentation (CP) to activate CD8+ T cells. Endoplasmic reticulum-associated degradation (ERAD) processes exogenous proteins for CP, but its role requires specific ER conditions for immune function.

Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Dendritic cells (DCs) are crucial for initiating adaptive immunity via cross-presentation (CP).
  • CP involves presenting exogenous antigens on MHC class I to prime CD8+ T cells, essential for cell-mediated immunity and self-tolerance.
  • Endoplasmic reticulum-associated degradation (ERAD) is a key pathway for processing exogenous proteins in CP.

Purpose of the Study:

  • To review recent advances in antigen cross-presentation (CP) by dendritic cells.
  • To focus on the intracellular transport of exogenous antigens.
  • To highlight the role of distinct subcellular compartments in ERAD within CP.

Main Methods:

  • Literature review of recent research on dendritic cell cross-presentation.
  • Analysis of endoplasmic reticulum-associated degradation (ERAD) pathways.
  • Investigation of intracellular antigen transport mechanisms.

Main Results:

  • ERAD plays a pivotal role in processing exogenous proteins for CP.
  • Contrasting endoplasmic reticulum (ER) conditions are necessary for CP and immune modulation.
  • Accumulation of ERAD substrates can lead to ER stress and apoptosis, while UPR inhibition is needed for immune molecule expression.

Conclusions:

  • Understanding the interplay between ERAD, ER stress, and immune modulation in DCs is critical.
  • Distinct subcellular compartments and transport routes are vital for efficient CP.
  • Further research into ERAD regulation in DCs could reveal new therapeutic targets.

Keywords:
cross-presentationdendritic cellsendoplasmic reticulum-associated degradationinflammationmajor histocompatibility class Iunfolded protein response

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