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

Acquisition of direct antiviral effector functions by CMV-specific CD4+ T lymphocytes with cellular maturation.
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DOI:
10.1084/jem.20052246
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发表时间:
2006-12-25
影响因子:
15.3
通讯作者:
Koup, Richard A.
Koup, Richard A.
中科院分区:
医学1区
文献类型:
--
作者:
Casazza, Joseph P.;Betts, Michael R.;Price, David A.;Precopio, Melissa L.;Ruff, Laura E.;Brenchley, Jason M.;Hill, Brenna J.;Roederer, Mario;Douek, Daniel C.;Koup, Richard A.

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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)-γ, tumor necrosis factor (TNF)-α, and interleukin (IL)-2, the chemokine macrophage inflammatory protein (MIP)-1β, 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-1β, TNF-α, and IFN-γ 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.
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