The authors report their clinical experience with VRCTC-310 in two patients suffering with advanced cancer in which the skin was severely compromised. VRCTC-310 is a combination of the snake venoms crotoxin (CT) and cardiotoxin (CD). The local (peritumoral) treatment with the drug (0.O14 mg/kg/week during 6 weeks) provoked the complete disappearance of a relapsed skin squamous cell cancer in one patient. The other patient was an aged woman with local-advanced breast cancer (carcinoma en cuirasse) who was inoculated intra-and-peritumoral with VRCTC-310. After 6 weekly courses (0.014 mg/kg/week) with the drug a > 80% tumor reduction was seen. A 133 days follow-up demonstrated not only an objective complete response of the primary tumor mass, but the disappearance of supraclavicular tumor mass as well a significant reduction in lymphangitis. To our knowledge, this is the first communication about the in vivo antitumoral activity of VRCTC-310 when injected locally to humans. Further studies are now in progress.

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Thirty patients with advanced squamous cell carcinoma of the cervix were included in a phase II study with cisplatin (DDP) and ifosfamide (IF)/mesna. They received a median of 4 courses of chemotherapy and were all evaluable for response and toxicity. Each cycle consisted of 2,500 mg/m2 IF i.v. days 1-5; mesna 500 mg/m2 i.v. at hours 0 and 2, and 1,000 mg/m2 per os at hours 6 and 10, days 1-5; DDP 20 mg/m2 i.v., days 1-5. Cycles were repeated every 4 weeks. One patient obtained CR and 14 PR giving an overall response rate of 50%. Mean duration of response was 21 months. Anemia grade 3 developed in 7 patients, leukopenia grade 3 in 9 patients and grade 4 in one patient; thrombopenia grade 3 in 2; creatinine clearance grade 3 in one; CNS grade 3 in one and cystitis grade 3 in one patient. Overall median survival time was about 25+ months (3-63+); after a follow-up of 70 months, 11 patients (37%) are still alive with a median survival of 31+ months. IF plus DDP seems to be a good combination for treatment of advanced cervical cancer, with acceptable tolerance and response rate.

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