Abstract
To find the optimal dose of immunomodulator Z-100 in patients with stage IIIB squamous cell carcinoma of the cervix in combination with radiation therapy. The patients were randomly assigned to the dosage levels of 2, 20 or 40 mug of Z-100. Z-100 was subcutaneously injected twice a week during radiotherapy and once in two weeks during the maintenance period. The response rate after radiotherapy was evaluated, and the optimal clinical dosage was then determined. Safety of Z-100 was evaluated during the radiation therapy and maintenance therapy. Survival was also evaluated. A total of 116 patients were entered. The adverse reactions were not dose-dependent and no serious toxicities were observed. The response rates were 72.2% (26/36) in the 2 microg group, 84.6% (33/39) in the 20 microg group and 94.3% (33/35) in the 40 microg group (P = 0.006). However, the survival was not significantly different. The optimal dose of Z-100 was determined to be 40 mug in combination with radiation therapy for stage IIIB cervical cancer. However, impact of Z-100 on survival must be determined by the placebo controlled randomized trial, because survival benefit was not observed in this small population study.
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