Selective inhibition of antigen-specific T lymphocyte proliferation by acute ethanol exposure: the role of impaired monocyte antigen presentation capacity and mediator production
Department of Surgery; Department of Medicine, Division of Gastroenterology
Adult; Alcoholic Intoxication; Antigen-Presenting Cells; Cell Communication; Epitopes; Ethanol; Humans; Lymphocyte Activation; Middle Aged; Monocytes; T-Lymphocytes
Life Sciences | Medicine and Health Sciences
Ethanol consumption is associated with impaired immunity. Our data demonstrate that even a single dose of a biologically relevant concentration (25-150 mM) of ethanol can down-regulate antigen-specific T lymphocyte proliferation. In contrast, ethanol augmented mitogen-induced T cell proliferation, suggesting that its inhibitory effect on antigen-specific T cell proliferation was due to its effects on monocytes (m phi s) rather than on T cells. The immunodepressive effects of ethanol on m phi antigen-presenting cell (APC) capacity were manifested whether alcohol treatment was limited to the antigen uptake-processing period only or was present during the entire period of antigen presentation. These inhibitory effects of ethanol were also evident on both the high-antigen-presenting, Fc gamma RI-negative (-31 +/- 17%), and low-antigen-presenting, Fc gamma RI-positive (-42 +/- 15%) m phi subpopulations. Further analysis demonstrated that ethanol inhibits the production of interleukin-1 beta (IL-1 beta) and induces transforming growth factor beta (TGF-beta) and prostaglandin E2 (PGE2), monocyte-derived mediators that can affect T cell proliferation. Ethanol resulted in a dose-dependent down-regulation of secreted and cell-associated IL-1 beta protein as well as IL-1 beta mRNA levels induced by adherence or bacterial stimulation. The causal relationship between decreased m phi IL-1 beta production, elevated TGF-beta levels, and the decreased m phi APC capacity was further substantiated when exogenous IL-1 beta protein or anti-TGF-beta neutralizing antibody prevented the down-regulatory effect of ethanol on antigen-specific T cell proliferation. Utilizing a cyclooxygenase inhibitor, we also demonstrated that the ethanol-induced decrease in m phi APCs is not mediated by enhanced PGE2 production.
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Citation: J Leukoc Biol. 1993 Dec;54(6):534-44.
Journal of leukocyte biology
Szabo, Gyongyi; Verma, Bikash K.; and Catalano, Donna, "Selective inhibition of antigen-specific T lymphocyte proliferation by acute ethanol exposure: the role of impaired monocyte antigen presentation capacity and mediator production" (1993). Open Access Articles. 1147.