Phase II evaluation of dibromodulcitol, ICRF-159, and maytansine for sarcomas

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Abstract
Patients with objectively measurable soft tissue sarcomas, osteosarcomas, chondrosarcomas, and mesotheliomas were treated with dibromodulcitol (DBD) (180 mg/m2 p.o. [per os] days 1-10 q4 wk), ICRF-159 (300 mg/m2 p.o. tid days 1-3 q4 wk), or maytansine (MAYT) (1.5 mg/m2 I.V. q3 wk). Evaluable patients (45) received DBD, 47 MAYT, and 37 ICRF-159. Only patients who had had their histopathologic diagnoses confirmed by a pathology reference panel were included in the final analysis. Two patients had objective partial responses: a patient with osteosarcoma who responded to DBD and a patient with fibrosarcoma who had a partial response of brief duration to ICRF-159. Approximately 70% of the patients treated with each drug were of ECOG [The Eastern Cooperative Oncology Group] performance status 0 or 1, and over half had moderate or worse toxicity. It seems unlikely that these drugs have significant therapeutic activity for common mesenchymal malignancies.

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