[Phase I clinical study of MX2 (KRN 8602)].
KRN 8602 is a new antineoplastic drug with the chemical structure, 3'-deamino-3'-morpholino-13-deoxo-10-hydroxycarminomycin hydrochloride. This drug was developed in an attempt to improve the clinical efficacy of currently used anthracyclines. In preclinical studies, KRN 8602 has been shown to produce less cardiotoxicity and alopecia, yet has comparable antitumor effects to adriamycin. In addition, KRN 8602 has shown antitumor effects on adriamycin-resistant tumors. A phase I clinical study was undertaken to determine the toxicity of KRN 8602 given as a single i.v. dose. Toxicity evaluation included CBC with differentials, platelet counts, SMA chemistry profile, EKG, urinalysis, plain chest X-ray and physical examination. Myelosuppression was the major side effect noted with leukopenia, and especially neutropenia, being dose-limiting. The degree of WBC suppression was dose-related and MTD appears to be 30 mg/m2. Nausea and vomiting were observed in cases who had received more than 10 mg/m2. No patient had alopecia. No obvious cardiotoxicity in this study. Maximum total cumulative dose of KRN 8602 was 450 mg/m2. Further observation is necessary to confirm this point. In this study of 10 cases, one breast carcinoma with bilateral lung metastasis revealed definite regression of metastasis for more than 18 months with this agent alone. This patient had previous chemo- and hormone therapy, containing adriamycin. The above preliminary phase I clinical study suggests strongly the usefulness of KRN 8602, and further investigations are indicated.
Majima
H
H
Chiba Cancer Center Hospital.
D000328:Adult; D000903:Antibiotics, Antineoplastic / Q000009:adverse effects / Q000627:therapeutic use*; D001943:Breast Neoplasms / Q000188:drug therapy*; D002360:Carubicin / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000627:therapeutic use; D003630:Daunorubicin / Q000031:analogs & derivatives*; D004341:Drug Evaluation; D005260:Female; D006801:Humans; D007275:Injections, Intravenous; D007970:Leukopenia / Q000139:chemically induced; D008297:Male; D008875:Middle Aged; D009325:Nausea / Q000139:chemically induced; D013274:Stomach Neoplasms / Q000188:drug therapy*; D014839:Vomiting / Q000139:chemically induced
D000903:Antibiotics, Antineoplastic; C053537:morpholinoanthracycline MX2; D002360:Carubicin; D003630:Daunorubicin