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Acquisition of direct antiviral effector functions by CMV-specific CD4+ T lymphocytes with cellular maturation.


ABSTRACT: The role of CD4+ T cells in the control of persistent viral infections beyond the provision of cognate help remains unclear. We used polychromatic flow cytometry to evaluate the production of the cytokines interferon (IFN)-gamma, tumor necrosis factor (TNF)-alpha, and interleukin (IL)-2, the chemokine macrophage inflammatory protein (MIP)-1beta, and surface mobilization of the degranulation marker CD107a by CD4+ T cells in response to stimulation with cytomegalovirus (CMV)-specific major histocompatibility complex class II peptide epitopes. Surface expression of CD45RO, CD27, and CD57 on responding cells was used to classify CD4+ T cell maturation. The functional profile of virus-specific CD4+ T cells in chronic CMV infection was unique compared with that observed in other viral infections. Salient features of this profile were: (a) the simultaneous production of MIP-1beta, TNF-alpha, and IFN-gamma in the absence of IL-2; and (b) direct cytolytic activity associated with surface mobilization of CD107a and intracellular expression of perforin and granzymes. This polyfunctional profile was associated with a terminally differentiated phenotype that was not characterized by a distinct clonotypic composition. Thus, mature CMV-specific CD4+ T cells exhibit distinct functional properties reminiscent of antiviral CD8+ T lymphocytes.

SUBMITTER: Casazza JP 

PROVIDER: S-EPMC2118179 | biostudies-literature | 2006 Dec

REPOSITORIES: biostudies-literature

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Acquisition of direct antiviral effector functions by CMV-specific CD4+ T lymphocytes with cellular maturation.

Casazza Joseph P JP   Betts Michael R MR   Price David A DA   Precopio Melissa L ML   Ruff Laura E LE   Brenchley Jason M JM   Hill Brenna J BJ   Roederer Mario M   Douek Daniel C DC   Koup Richard A RA  

The Journal of experimental medicine 20061211 13


The role of CD4+ T cells in the control of persistent viral infections beyond the provision of cognate help remains unclear. We used polychromatic flow cytometry to evaluate the production of the cytokines interferon (IFN)-gamma, tumor necrosis factor (TNF)-alpha, and interleukin (IL)-2, the chemokine macrophage inflammatory protein (MIP)-1beta, and surface mobilization of the degranulation marker CD107a by CD4+ T cells in response to stimulation with cytomegalovirus (CMV)-specific major histoco  ...[more]

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