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J Immunol. 1980 Sep;125(3):1269-74.

The cellular basis for viral-induced immunodeficiency: analysis by monoclonal antibodies.


Viral infections are often associated with immunodeficiency states. Although T lymphocytes have been thought to suppress the host's response, the precise etiology remains unclear. Therefore, we characterized T lymphocytes from six patients during both acute and convalescent phases of infectious mononucleosis (IM) with monoclonal antibodies (titer, 10(-5) to 10(-7) to antigens restricted to the TH2- helper (T4) and TH2 suppressor (T5) T cell subsets as well as to a common T cell antigen (T3) and HLA-D related Ia antigens. It was found that during acute infectious mononucleosis, there is both activation and increase of suppressor T cells (T5+, Ia+ phenotype). Fuctionally, the acute IM lymphocytes suppress autologous T cell proliferation to antigens as well as pokeweed mitogen driven B cell immunoglobulin production. In contrast, convalescence is associated with a return to normal of T cell subsets and immune function. These results demonstrate that viral infections can preferentially activate a specific T cell subset and suppress the overall human immune response.

[PubMed - indexed for MEDLINE]
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