three cultured human cell lines , renal cancer cells ( achn ) , bladder cancer cells ( ej ) , and fibroblasts transformed in culture by co-60 gamma rays ( kmst-6 ) , when treated with interferon-beta , produced 1.5 to 4 times as much plasminogen activator as the untreated control cultures .
C0007634
cells
C0016030
fibroblasts