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Research Article Free access | 10.1172/JCI115457

Activation of T lymphocytes in dengue virus infections. High levels of soluble interleukin 2 receptor, soluble CD4, soluble CD8, interleukin 2, and interferon-gamma in sera of children with dengue.

I Kurane, B L Innis, S Nimmannitya, A Nisalak, A Meager, J Janus, and F A Ennis

Department of Medicine, University of Massachusetts Medical Center, Worcester 01655.

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Department of Medicine, University of Massachusetts Medical Center, Worcester 01655.

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Department of Medicine, University of Massachusetts Medical Center, Worcester 01655.

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Department of Medicine, University of Massachusetts Medical Center, Worcester 01655.

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Department of Medicine, University of Massachusetts Medical Center, Worcester 01655.

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Department of Medicine, University of Massachusetts Medical Center, Worcester 01655.

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Department of Medicine, University of Massachusetts Medical Center, Worcester 01655.

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Published November 1, 1991 - More info

Published in Volume 88, Issue 5 on November 1, 1991
J Clin Invest. 1991;88(5):1473–1480. https://doi.org/10.1172/JCI115457.
© 1991 The American Society for Clinical Investigation
Published November 1, 1991 - Version history
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Abstract

It has been reported that the severe complication of dengue virus infection, dengue hemorrhagic fever (DHF) is much more commonly observed during secondary dengue virus infections than primary infections. In order to elucidate the role of T lymphocytes in the pathogenesis of DHF, we attempted to determine whether T lymphocytes are activated in vivo during dengue virus infections, by examining the levels of soluble IL-2 receptor (sIL-2R), soluble CD4 (sCD4), soluble CD8 (sCD8), interleukin-2 (IL-2) and interferon-gamma (IFN gamma) in the sera of 59 patients with DHF and 41 patients with dengue fever (DF). The levels of sIL-2R, sCD4, sCD8, IL-2, and IFN gamma were significantly higher in the acute sera of patients with DHF than in the sera of healthy children (P less than 0.001 for all markers). The acute sera of patients with DF contained higher levels of sIL-2R, sCD4, IL-2, and IFN gamma than the sera of healthy children (P less than 0.001 for sIL-2R, IL-2, and IFN gamma; P less than 0.05 for sCD4), but did not have elevated levels of sCD8. The levels of sIL-2R (P less than 0.05), sCD4 (P less than 0.001), and sCD8 (P less than 0.001) were higher in DHF than in DF on days 3-4 after the onset of fever. The levels of IL-2 and IFN gamma in patients with DHF were highest 1 d before defervescence. There were no significant differences in the levels of sIL-2R, sCD4, sCD8, IL-2, and IFN gamma among grades 1, 2, and 3 of DHF. These results indicate (a) T lymphocytes are activated and produce IL-2 and IFN gamma in vivo during DHF and DF, (b) CD4+ T lymphocytes are activated in DHF and DF, and the level of activation is higher in DHF than in DF, and (c) activation of CD8+ T lymphocytes is evident in DHF, but not in DF.

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