[Anticancerous chemotherapy trial with duborimycin. Analysis of 151 cases]

Duborimycin is a new antimitotic agent approaching danorubicin and adriamycin in activity which has been tried on 151 patients suffering from cancer of different types, is an advanced local/regional stage and/or metastatic disease. It was administered intravenously every fortnight in a mean unit dose of 400 mg, and the duration of the treatment ranged from 2 to 52 weeks. Objective improvement was registered in 56 patients of the 135 cases in whcih the results were assessed (around 41.4% of cases). In 4 cases the regression of tumour volume was greater than 50% (one of these cases was in melanoma, the other a sarcoma) and in 2 cases regression was complete (a squamous cell carcinoma and an embryonal testicular tumour). The subjective effects were appreciable in 53 of the 115 cases which could be studied (46%) and above all in the refractory pain of bony secondaries from breast cancer (a favourable response in 78% of cases). Manifestations of intolerance/toxicity were of a minor nature on the haematologic side, that cardiologic ones relatively frequent (18% of treated cases) and occasionally serious (2 cases of asystole). Great care is therefore necessary in supervision of the treatment. However, the first results obtained by this line of approach, notably in chemo-resistant forms of tumour such as melanoma and sarcomas, utilizing the very strict criteria in one analysis encourage further study of duborimycin in cases of this sort (preferably in association and in accordance with protocols of comparative trials) so that its place in cancer chemotherapy may be more precisely defined.