[Phase I study of YM881 (zinostatin stimalamer) suspension by hepatic arterial infusion. Research Group for Intra-arterial Infusion Therapy with YM881].
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A phase I study of YM-881 (zinostatin stimalamer), neocarzinostatin combined with butylesterified styrene maleate, suspended in iodized poppy oil ethyl ester, was conducted in patients with hepatocellular carcinoma by giving single intra-arterial infusions via catheters inserted by Seldinger's method. Four dose levels, 2, 4, 6, and 8 mg, were tested. Major adverse reactions were fever, anorexia, nausea, vomiting, and abnormal hepatic function. Both the incidence and severity of adverse reactions tended to increase with the 8 mg dose. Tumor regression of 50% or more occurred in one receiving 2 mg and one receiving 4 mg. The results of the study suggest that doses of 6 mg or less may be appropriate for the phase II studies.