alpha>sub>1-Acid glycoprotein possesses in vitro pro- and antiinflammatory activities.

摘要

We studied the effects of alpha>sub>1-acid glycoprotein on tumor necrosis factor-alpha (TNF-alpha) and interleukin-10 (IL-10) production and lymphocyte response to phytohemagglutinin in cultured peripheral blood mononuclear leukocytes from 6 healthy donors. We observed 2 opposite responses to alpha>sub>1-acid glycoprotein: first, stimulation of TNF-alpha and IL-10 production and inhibition of lymphocyte proliferation, and second, suppression of cytokine production and stimulation of lymphocyte proliferation. In cell cultures isolated from 4 of 6 donors, the TNF-alpha/IL-10 ratio remained unchanged after addition of native alpha>sub>1-acid glycoprotein, but some fractions isolated by chromatography on concanavalin A-Sepharose changed this parameter. These changes were most pronounced after treatment with fraction C enriched with molecules with incomplete (biantennary) carbohydrate chains. The mechanisms of alpha>sub>1-acid glycoprotein-induced effects on peripheral blood mononuclear leukocytes are discussed.