DETECTION OF IL-1β PRODUCED BY HUMAN BLOOD CELLS IN PRESENCE OF PROTEINS FROM THE γ-GLOBULIN FRACTION AND THEIR COMPLEXES WITH METALS

Abstract

Present study has shown that a total cytokine pool produced by human blood cells in presence of proteins from the γ-globulin fraction, or their complexes with copper and zinc, as well as with pure copper and zinc cations, contains up to 148.0±14.9 pg interleukin-1β (IL-1β) per mL. The γ-globulins modified by copper or zinc binding induce, resp., 2.0 and 1.4-fold less IL-1β than intact proteins (significant by p = 0.1). Meanwhile, the copper-γ-globulin proved to be 2.7-fold more active (р < 0.01) IL-1β inducer, as a zinc-protein complex. Pure zinc ions did not induce IL-1β production, whereas induction rates with pure copper ions are 1.6-fold higher (p < 0.05) than with γ-globulin, and 1.45-fold more efficient that PHA stimulation (p < 0.1). A potential participation of copper and zinc cations bound to antibodies from the microenvironment and, thus, transforming Fc regions of antibody molecules, is discussed with regard of regulation of IL-1β production by human blood cells induced by activation of their Fc receptors.

Keywords

• γ-globulin
• metal complexes
• il-1β
• induction
• production