LPS-INDUCED RELEASE OF EGF, GM-CSF, GRO-ALPHA, LIF, MIP-1-ALPHA AND PDGF-AB IN PBMC FROM PERSONS WITH HIGH OR LOW-LEVELS OF HDL LIPOPROTEIN

We have examined basal and lipopolysaccharide (LPS)-induced release of epidermal growth factor (EGF), granulocyte-macrophage colony-stimulating factor (GM-CSF), growth-regulated peptide alpha (GRO alpha), leukaemia inhibitory factor (LIF), macrophage inflammatory protein-la (MIP-1 alpha) and platelet-derived growth factor-AB (PDGF-AB) in peripheral blood mononuclear cells (PBMC) from 20 persons with either high (n = 10) or low (n = 10) levels of high-density lipoprotein (HDL). PBMC were incubated with 100 ng LPS/ml for up to 160 h, and showed a significantly higher release of the chemokines GRO alpha (P = 0.04) and MIP-1 alpha (P < 0.01) in persons with high HDL, whereas levels of GM-CSF were similar, Levels of EGF, LIF and PDGF-AB were always low, and remained unaltered during 160 h of incubation, These findings indicate that PBMC from persons,vith high or low levels of HDL have different functional properties, of importance in cell recruitment and activation. (C) 1995 Academic Press Limited