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Updated: Jul 16, 2026

Generation of Human Alloantigen-specific T Cells from Peripheral Blood
Published on: November 21, 2014
Antigen bias in T cell cross-priming.
Monika C Wolkers1, Nathalie Brouwenstijn, Arnold H Bakker
1Division of Immunology, Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, Netherlands.
Cross-priming, essential for CD8+ T cell activation against exogenous antigens, is inefficient for signal sequence-derived epitopes. This impairment may hinder immune detection of certain viral and tumor antigens, impacting vaccine design.
Area of Science:
- Immunology
- Cellular Biology
- Vaccinology
Background:
- CD8+ T cells identify infected or cancerous cells via MHC class I-bound peptides from endogenous proteins.
- CD8+ T cell activation can also occur via cross-priming, where antigen-presenting cells present exogenous peptides.
Purpose of the Study:
- To investigate the efficiency of exogenous antigen presentation, specifically epitopes derived from signal sequences, in CD8+ T cell activation.
- To understand the implications of antigen cross-presentation efficiency for immune surveillance and vaccine development.
Main Methods:
- Utilized mouse models to study antigen presentation pathways.
- Analyzed the presentation of epitopes derived from signal sequences via cross-priming.
Main Results:
- Observed significant inefficiency in the cross-presentation of epitopes originating from signal sequences.
- Demonstrated that impaired cross-priming can limit CD8+ T cell detection of certain viral and tumor antigens.
Conclusions:
- The cross-presentation pathway exhibits differential efficiency for various antigen types, particularly those with signal sequences.
- Consideration of antigen cross-presentation capabilities is crucial for designing effective vaccines against viral and tumor threats.
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