Peripheral Pool of CD8+ T-Cells Contains Lymphocytes with Antigen-Specific Receptors That Recognize Syngeneic MHC Class II Molecules

Peripheral Pool of CD8+ T-Cells Contains Lymphocytes with Antigen-Specific Receptors That... The capacity of T-lymphocytes to recognize “nonself” and tolerating “self” is formed as a result of positive and negative selection in the thymus. While obtaining and testing specificity of T-hybridomas, we demonstrated that the major part of peripheral pool of CD8+ T-lymphocytes carried receptors specific to “self” MHC class II molecules. Such an unexpected specificity of receptors has been found in some T-cell hybridomas produced by fusion of activated peripheral CD8+ T-lymphocytes with a tumor partner transfected by the coreceptor CD4 gene. The reactivity to “self” is not an experimental artifact due to an increased avidity of interaction of the hybridoma cells with antigen-presenting cells. Also, it is not an expression of reactivity of T-cells to superantigens, products of endogenous viruses of mouse breast cancer. The formation of a pool of such T-cells involves both cells with double receptor specificity and cells coexpressing two α-chains of T-cell receptor. Their appearance in the periphery can be due to the capacity of thymocytes differentiating in the direction of CD4+ cells to avoid negative selection via change of expression of coreceptor CD4 to CD8. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Developmental Biology Springer Journals

Peripheral Pool of CD8+ T-Cells Contains Lymphocytes with Antigen-Specific Receptors That Recognize Syngeneic MHC Class II Molecules

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2004 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Animal Anatomy / Morphology / Histology
ISSN
1062-3604
eISSN
1608-3326
D.O.I.
10.1023/B:RUDO.0000029712.45718.65
Publisher site
See Article on Publisher Site

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