Interleukin 10 (IL-10) inhibits the release of proinflammatory cytokines from human polymorphonuclear leukocytes. Evidence for an autocrine role of tumor necrosis factor and IL-1 beta in mediating the production of IL-8 triggered by lipopolysaccharide. - Cassatella,M.A.; Meda,L.; Bonora,S.; Ceska,M.; Constantin,G. (J Exp Med, 1993)