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EFFECT OF ACNU AGAINST EXPERIMENTAL BRAIN TUMOR:IMMUNOHISTOCHEMICAL STUDY USING ANTI-BRDU MONOCLONAL ANTIBODY Shuichi Izumoto 1 , Norio Arita 2 , Yukitaka Ushio 3 , Toru Hayakawa 2 , Toshiki Yoshimine 2 , Huang Tzuu-Yuan 2 , Masaaki Nagatani 2 , Yuzuru Oku 1 , Heitaro Mogami 2 1Department of Neurosurgery, Kansai Rosai Hospital 2Department of Neurosurgery, Osaka University Medical School 3Department of Neurosurgery, Kumamoto University Medical School pp.1095-1099
Published Date 1988/11/1
DOI https://doi.org/10.11477/mf.1406206212
  • Abstract
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We have studied the effecacy of intrathecal ACNU against experimental leptomeningeal tu-mors. In the present report, the effect of ACNU on the growth kinetics of the tumor was evaluated by the immunohistochemical technique using anti-BrdU monoclonal antibody. The experimentalleptomeningeal tumor was developed by inocula-tion of Walker 256 carcinosarcoma cells into the cisterna magna of rats. Seven days after the in-oculation of tumor cells, the animals were treated either by intravenous (15 mg/kg) or intrathecal (1. 5 mg/kg) ACNU. Four, 12, 24, 48, 96 or 144 hours after treatment, the animals received intra-venous BrdU (200 mg/kg). Thirty minutes there-after, they were sacrificed and the brain was removed. L. I. was calculated by counting the immunoreactive tumor cells. L. I. of the tumor without treatment on the seventh day after ino-culation was over 40%. L. I. began to decrease 24 hours after intravenous ACNU, and remained 11% up to 96 hours. On the other hand, L. I. already decreased to 20% 4 hours after intrathecal ACNU and remained to be low (17%) up to 48 hours. However, L. I. increased to 38% at 96 hours. Thus, the effect on the growth kinetics of the tumor differs between intravenous and intra-thecal ACNU. These results are considered to be useful informations for determining the optimal dosage of the antineoplatsic agent against the brain tumor and developing the effective combina-tion chemotherapy.


Copyright © 1988, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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