title: Lethal and cytokinetic effects of anguidine on a human colon cancer cell line.
abstract: Anguidine is a fungal metabolite with antitumor activity in a murine colon cancer model. Because of disappointing results in clinical trials, we analyzed the lethal and cytokinetic effects of anguidine on cultured human colon cancer cells. The studies revealed a moderate reduction in survival only after prolonged drug exposure. Continuous incubation with anguidine for longer than 48 hr produced a moderate increase in the percentage of S-phase cells and a slight decrease in the proportion of cells in G1/0, by pulse cytophotometry. An immediate reduction in the cumulative labeling index for cells continuously exposed to tritiated thymidine and anguidine and a rapid decrease in the cumulative mitotic index for cells continuously exposed to Colcemid and anguidine indicated a block at the G1 into S and G2 into mitosis transitions. Tumoricidal activity of anguidine in a cultured human colon cancer line is poor and requires prolonged exposure. The kinetic data reflect an almost frozen state of the cell cycle.
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy* / Q000473:pathology; D002453:Cell Cycle / Q000187:drug effects; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D003110:Colonic Neoplasms / Q000188:drug therapy* / Q000473:pathology; D006801:Humans; D007700:Kinetics; D009374:Neoplasms, Experimental / Q000188:drug therapy; D012717:Sesquiterpenes / Q000494:pharmacology*; D014255:Trichothecenes / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D012717:Sesquiterpenes; D014255:Trichothecenes; C001809:diacetoxyscirpenol