[Pharmacodynamic study of mitomycin C mixed with fibrin glue for treatment of malignant brain tumors].

The chemotherapy for malignant brain tumors creates two major problems to be solved viz systemic toxicity and interference by the blood brain barrier. The interstitial chemotherapy with sustained release of anticancer drugs has been widely investigated to overcome these problems. The Mitomycin C (MMC) - contained fibrin glue might be a promising candidate for use in local chemotherapy of malignant brain tumors. We investigated pharmacokinetics of the MMC-contained fibrin clot in vitro, activity of the MMC for the cultured glioma cell line, and its effect on the normal mouse brain. The MMC concentration in saline was measured up to 96 hours after the placement of fibrin glue into 5, 10 and 15 ml of saline. Then we periodically replaced the saline to keep the concentration difference of the MMC between the saline and the fibrin clot and evaluated the dissolution of the MMC for 288 hours. The potency of the MMC to suppress the rat glioma cell line was measured after being dissolved from the MMC-contained fibrin clot. The effects of the MMC-contained fibrin clot were histologically evaluated. The MMC-contained fibrin glue, the MMC solution and the fibrin glue were separately injected into the mouse brains. Mice were sacrificed 24, 72, 168 and 336 hours after the injection and brains were examined with photomicroscopy. The MMC was released into the saline rapidly within 24 hours then gradually released until 96 hours had elapsed. Total amounts of the dissolved MMC were proportional to the amounts in the saline.(ABSTRACT TRUNCATED AT 250 WORDS)