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Proliferation Inhibition of Glioma Cells by Vitamin K2 Liankun SUN 1 , Yoshihiko YOSHII 1 , Koichi MIYAGI 1 , Akihiko ISHIDA 1 1Department of Neurosurgery, School of Medicine, University of the Ryukyus Keyword: glioma cell , vitamin K2 , antitumor effect , apoptosis , vitamin D pp.119-125
Published Date 1999/2/10
DOI https://doi.org/10.11477/mf.1436901674
  • Abstract
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The antitumor effects of vitamin K2 were studied using three glioma cell lines: C6 (rat glioma cell),RBR17T and T98G (human glioma cell). The antitumor effects were estimated by count assay. The resultswas that vitamin K2 induced growth inhibition in a dose-dependent manner. The RBR 17T cells exposed tovitamin K2 for 72 hours resulted in oligonucleosomal DNA fragmentation and formed a ladder on agarosegel electrophoresis. Furthermore, the RBR17T cells exposed to vitamin K2 for 24 hours were significantlyaccumulated in the G0G1 phase of the cell cycle. Those results suggested that vitamin K2 can inhibit theproliferation of cells through the induction of cell cycle arrest and apoptosis for tumor cells. The combined treatment of vitamin K2 with ACNU or 5-FU or INF-β or 1,25-dihydroxyvitamin D3 en-hanced growth inhibition significantly. In conclusion, vitamin K2 can he a useful drug for the treatment ofglioma.


Copyright © 1999, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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