Abstract
Beta-endorphin stimulates phytohemagglutinin-induced production of IL-4 and does not modify the production of gamma-IFN in nonfractionated leukocyte suspension. In a culture of purified CD4+ T-cells, beta-endorphin does not modify the levels of IL-4 and gamma-IFN, but stimulates the production of IL-4 and inhibits gamma-IFN production after addition of monocytes to CD4+ lymphocytes. Stimulation of IL-4 synthesis by beta-endorphin is mediated by the cycloxygenase cycle products. Hence, beta-endorphin shifts T-helper polarization towards Th2 cells with subsequent predominance of the humoral form of the immune response.
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