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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Phase II study of CI-980 (NSC 635370) in patients with previously treated advanced soft-tissue sarcomas.

Doxorubicin and ifosfamide are the two most active agents in the treatment of soft-tissue sarcomas. Patients whose tumors have failed these two drugs have very limited systemic therapy options. It is, therefore, important to identify newer drugs with activity against this disease. CI-980 is a synthetic mitotic inhibitor that binds to tubulin at the colchicine binding site and inhibits the polymerization of tubulin and blocks cell cycle progression in mitosis. Given its broad spectrum activity against several solid tumor models in vivo, we decided to perform a phase 2 study of this drug in previously treated soft-tissue sarcomas. A total of 18 eligible and evaluable patients were entered in the first stage of the trial. The median age was 53 yrs (range, 17-72). No objective responses have been noted. Six patients had stable disease after a median of 3.5 cycles of chemotherapy while 12 others had progressive disease. A total of 48 cycles were administered, 42 of which were administered at dose level 0 (4.5 mg/m2/d x 3). The median AGC nadir was 1.2/microl(0.1 -4.7) on day 10 and the median platelet nadir was 150,000/microl (31,000-338,000). Twenty cycles were complicated with grade 3-4 neutropenia and two cycles were complicated with FUO. There were no CNS toxicities. One patient had a grade 1 thrombophlebitis in 2 cycles and one other patient had a grade 4 thrombophlebitis in one cycle. In conclusion, CI-980 was well tolerated at this dose and schedule but inactive in soft-tissue sarcomas.[1]


  1. Phase II study of CI-980 (NSC 635370) in patients with previously treated advanced soft-tissue sarcomas. Patel, S.R., Burgess, M.A., Papadopolous, N.E., Sidhu, G., Gray, R., Plager, C., Jenkins, J., Benjamin, R.S. Investigational new drugs. (1998) [Pubmed]
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