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Related Experiment Videos

Targeting p53 as a general tumor antigen

M Theobald1, J Biggs, D Dittmer

  • 1Department of Immunology, Scripps Research Institute, La Jolla, CA 92037, USA.

Proceedings of the National Academy of Sciences of the United States of America
|December 19, 1995
PubMed
Summary

Researchers bypassed T cell tolerance to cancer antigens by using species differences. This strategy identified broadly distributed tumor targets for effective cancer immunotherapy and vaccines.

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Area of Science:

  • Immunology
  • Oncology
  • Vaccinology

Background:

  • Cancer immunotherapy and vaccine design face challenges due to unique tumor antigens and T cell tolerance.
  • Developing therapies that target broadly distributed tumor antigens is crucial for effective cancer treatment.

Purpose of the Study:

  • To devise a strategy to overcome T cell tolerance to tumor antigens.
  • To identify broadly distributed tumor determinants for immunotherapy.

Main Methods:

  • Utilized HLA transgenic mice to generate cytotoxic T lymphocytes.
  • Focused on peptides from the human p53 tumor-suppressor molecule presented by HLA-A2.1.
  • Exploited species differences in protein sequences to circumvent T cell tolerance.

Main Results:

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  • Generated p53-specific cytotoxic T lymphocytes.
  • These T cells did not recognize normal human cells.
  • Demonstrated lysis of diverse human tumor cell lines by the generated T cells.

Conclusions:

  • Confirmed the existence of broadly distributed tumor determinants.
  • These determinants can serve as targets for novel cancer immunotherapies and vaccines.
  • The experimental strategy effectively circumvents T cell tolerance to high-affinity T cells.