A Novel Thymoma-Associated Immunodeficiency with Increased Naive T Cells and Reduced CD247 Expression

Christopoulos P, Dopfer EP, Malkovsky M, Esser PR, Schaefer HE, Marx A, Kock S, Rupp N, Lorenz MR, Schwarz K, Harder J, Martin SF, Werner M, Bogdan C, Schamel WWA, Fisch P (2015)


Publication Type: Journal article

Publication year: 2015

Journal

Book Volume: 194

Pages Range: 3045-53

Journal Issue: 7

DOI: 10.4049/jimmunol.1402805

Abstract

The mechanisms underlying thymoma-associated immunodeficiency are largely unknown, and the significance of increased blood ?? ? cells often remains elusive. In this study we address these questions based on an index patient with thymoma, chronic visceral leishmaniasis, myasthenia gravis, and a marked increase of rare ?? T cell subsets in the peripheral blood. This patient showed cutaneous anergy, even though he had normal numbers of peripheral blood total lymphocytes as well as CD4(+) and CD8(+) T cells. Despite his chronic infection, analyses of immunophenotypes and spectratyping of his lymphocytes revealed an unusual accumulation of naive ?? and ?? T cells, suggesting a generalized T cell activation defect. Functional studies in vitro demonstrated substantially diminished IL-2 and IFN-? production following TCR stimulation of his "untouched" naive CD4(+) T cells. Biochemical analysis revealed that his ?? and ?? T cells carried an altered TCR complex with reduced amounts of the ?-chain (CD247). No mutations were found in the CD247 gene that encodes the homodimeric ? protein. The diminished presence of CD247 and increased numbers of ?? T cells were also observed in thymocyte populations obtained from three other thymoma patients. Thus, our findings describe a novel type of a clinically relevant acquired T cell immunodeficiency in thymoma patients that is distinct from Good's syndrome. Its characteristics are an accumulation of CD247-deficient, hyporresponsive naive ?? and ?? T cells and an increased susceptibility to infections.

Authors with CRIS profile

Involved external institutions

How to cite

APA:

Christopoulos, P., Dopfer, E.P., Malkovsky, M., Esser, P.R., Schaefer, H.-E., Marx, A.,... Fisch, P. (2015). A Novel Thymoma-Associated Immunodeficiency with Increased Naive T Cells and Reduced CD247 Expression. Journal of Immunology, 194(7), 3045-53. https://dx.doi.org/10.4049/jimmunol.1402805

MLA:

Christopoulos, Petros, et al. "A Novel Thymoma-Associated Immunodeficiency with Increased Naive T Cells and Reduced CD247 Expression." Journal of Immunology 194.7 (2015): 3045-53.

BibTeX: Download