BACKGROUND &OBJECTIVE: Fas/FasL pathway play an important role in cell apoptosis. To investigate the role of Fas/FasL system in polyamine biosyth esis inhibition and malignant phenotype reversion of carcinoma cells, we examine d the effect of DFMO (α-difluoromethylornithine), an inhibitor of polyamine bi osynthesis, on cell growth and apoptosis of A549 cells, and their association wi th human lung carcinoma-associated antigen, ras P21 protein, and Fas/FasL. METH ODS: MTT assay,flow cytometry,and DNA fragm...