recombinant human interleukin-1 beta ( il-1 ) and tumor necrosis factor-alpha ( tnf ) synergistically stimulated balb/c 3t3 cells to produce a chemotactic factor for rat polymorphonuclear leukocytes ( pmns ) , whereas an addition of 10 ( -11 ) -10 ( -8 ) m il-1 or tnf alone to the cell culture resulted in a slight increase in the production of chemotactic factor .
C0086418
human
C0021753
il-1