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- W2057185057 abstract "<i>Background:</i> Stress influences immune function through mechanisms including an impact on regulatory elements. We have previously demonstrated that glucocorticoids (GCs) and catecholamines can influence immunomodulation including changes in Th1/Th2 cytokine production. These immunoregulatory imbalances are associated with elevated cortisol in vivo and in the presence of GCs in vitro. <i>Methods:</i> We examined the effects of dexamethasone (DEX) and epinephrine (EPI) on the balance of regulatory T cells (Tregs), Th1/Th2 cytokine gene expression by peripheral blood mononuclear cells (PBMCs) from 16 normal subjects after 24-hour and 11-day cultures with tetanus toxoid. We wished to determine whether the immunomodulatory effects of stress hormones involved differences in costimulatory signal pathways including CD28, CTLA-4 (CD152), and CD80/86. <i>Results:</i> Our results revealed that FoxP3 mRNA expression (representing Tregs) was decreased in PBMCs cultured with DEX relative to the control within 24 h (short term). DEX decreased the Th1/Th2 cytokine mRNA balance after 11 days (long term). CD28 and CD80 mRNA were decreased in short-term incubation with DEX whereas the effect of inhibition by DEX on CTLA-4 mRNA was detected only in long-term cultures. <i>Conclusions:</i> These results suggest that the Treg (FoxP3 mRNA) and CD28/CD80 costimulatory signal pathway may be a target of stress hormones in acute stress while the CTLA-4/CD80–86 pathway may be more susceptible in chronic stress." @default.
- W2057185057 created "2016-06-24" @default.
- W2057185057 creator A5039468195 @default.
- W2057185057 creator A5077027296 @default.
- W2057185057 date "2010-07-07" @default.
- W2057185057 modified "2023-09-25" @default.
- W2057185057 title "Immunomodulatory Effects of in vitroStress Hormones on FoxP3, Th1/Th2 Cytokine and Costimulatory Molecule mRNA Expression in Human Peripheral Blood Mononuclear Cells" @default.
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- W2057185057 doi "https://doi.org/10.1159/000311450" @default.
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