Selective depletion of V beta 2+CD8+ T cells in peripheral blood from rheumatic heart disease patients

Carrion, F; Fernandez, M.; Iruretagoyena M.; Andrade, LEC; Odete-Hilario, M; Figueroa F.

Abstract

Acute rheumatic fever (ARF) and its chronic valvular sequelae are the delayed consequence of a pharyngeal infection with group A Streptococcus (GAS). Several GAS proteins have been shown to be superantigens, raising the possibility that the expansion or deletion of T cells expressing specific V? regions might play a role in the pathogenesis of ARF or chronic rheumatic heart disease (RHD). We therefore analyzed by four-color flow cytometry, the V? repertoire on CD3, CD4 and CD8 T cells from four ARF patients, 10 RHD patients and also nine healthy controls. A selective depletion of V?2+ T cells was found only in the CD8 subset of chronic RHD patients. This is of interest since a number of GAS superantigens exert their effects on V?2+ cells and because only CD8+ T cells from ARF and RHD patients undergo anergy in response to GAS superantigens. Our results suggests that an ongoing immune process is present in RHD patients and that CD8+ T cells may have an important immunoregulatory role in the pathogenesis of the disease. © 2003 Elsevier Science Ltd. All rights reserved.

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Título según WOS: Selective depletion of V beta 2+CD8+ T cells in peripheral blood from rheumatic heart disease patients
Título según SCOPUS: Selective depletion of V?2+CD8+ T cells in peripheral blood from rheumatic heart disease patients
Título de la Revista: JOURNAL OF AUTOIMMUNITY
Volumen: 20
Número: 2
Editorial: ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Fecha de publicación: 2003
Página de inicio: 183
Página final: 190
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S0896841103000027
DOI:

10.1016/S0896-8411(03)00002-7

Notas: ISI, SCOPUS