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Updated: Jul 20, 2026

Purification of the Membrane Compartment for Endoplasmic Reticulum-associated Degradation of Exogenous Antigens in Cross-presentation
12:48

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

Published on: August 21, 2017

Antigen processing/presenting and oncogenesis

A M Abdelnoor1

  • 1Department of Microbiology & Immunology, Faculty of Medicine, American University of Beirut, Lebanon.

Critical Reviews in Oncogenesis
|January 1, 1997
PubMed

Insights

The host immune system often fails to recognize tumor antigens due to issues with antigen processing and presentation. Therapeutic strategies like gene therapy and peptide vaccines aim to overcome this, but carry risks of autoimmune disease.

Area of Science:

  • Immunology
  • Oncology
  • Cancer Research

Background:

  • Tumor cells express antigens, but the host immune system fails to recognize them.
  • The antigen processing and presentation machinery is critical for initiating an immune response against cancer.

Purpose of the Study:

  • To review the causes of immune system failure in processing/presenting tumor antigens.
  • To discuss therapeutic strategies for enhancing anti-tumor immunity.
  • To highlight the risks associated with inducing immune responses to tumor antigens.

Main Methods:

  • Review of existing literature on tumor immunology and antigen presentation.
  • Analysis of factors affecting major histocompatibility complex (MHC) and costimulatory molecule expression.
  • Evaluation of cytokine profiles in the tumor microenvironment.

Main Results:

  • Deficiencies in MHC and costimulatory molecule expression by tumor cells impair immune recognition.
  • Tumor cell-intrinsic factors and cytokine milieu contribute to immune evasion.
  • Gene therapy (MHC, costimulatory molecules, cytokines, tumor antigens) and tumor peptide vaccines show therapeutic potential.

Conclusions:

  • Understanding antigen processing defects is key to developing effective cancer immunotherapies.
  • Therapeutic interventions can enhance anti-tumor immune responses but require careful consideration of potential autoimmune side effects.

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