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Human T cell clones present antigen.

C R Hewitt¹, M Feldmann

¹Charing Cross Sunley Research Centre, London, U.K.

Journal of Immunology (Baltimore, Md. : 1950)

|July 15, 1989

Summary

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Human T cell clones can present and respond to influenza virus antigens, even without other antigen-presenting cells. This suggests T cells possess a dual role in immune responses.

Area of Science:

Immunology
Cellular Biology

Context:

Investigating the complex interactions within the immune system.
Understanding the roles of T cells and antigen presentation.

Purpose:

To explore the capacity of human T cell clones to present and respond to influenza virus antigens.
To determine if T cells can act as antigen-presenting cells (APCs) themselves.

Summary:

Two human T cell clones were identified that react to influenza virus hemagglutinin (HA) type H3 and its synthetic peptides.
These T cell clones could present peptide antigens without peripheral blood mononuclear cell (PBMC) antigen-presenting cells (APCs), indicating a simultaneous presentation and response capability.
T cell presentation was MHC class II restricted, dose-dependent, and reliant on the number of antigen-presenting T cells.

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Impact:

Provides evidence for a novel function of T cells as simultaneous antigen presenters and responders.
Challenges conventional understanding of antigen processing and presentation pathways.
Opens new avenues for research in T cell-mediated immunity and autoimmune diseases.