we now report that purified recombinant human cytokines , interleukin-1 alpha , interleukin-1 beta , tumor necrosis factor alpha , tumor necrosis factor beta ( or lymphotoxin ) and , to a variable extent , interferon-gamma , stimulate the dna synthesis of human synovial fibroblast-like cells cultured in low ( i.e. , 1 % ) fetal bovine serum .
C0016030
fibroblast
C0007634
cells