Efficacy of ribavirin against malignant glioma cell lines: Follow-up study

Yushi Ochiai, Emiko Sano, Yutaka Okamoto, Sodai Yoshimura, Kotaro Makita, Shun Yamamuro, Takashi Ohta, Akiyoshi Ogino, Hisashi Tadakuma, Takuya Ueda, Tomohiro Nakayama, Hiroyuki Hara, Atsuo Yoshino*, Yoichi Katayama


研究成果: Article査読

13 被引用数 (Scopus)


Ribavirin, a nucleic acid analog, has been employed as an antiviral agent against RNA and DNA viruses and has become the standard agent used for chronic hepatitis C in combination with interferon-α2a. Furthermore, the potential antitumor efficacy of ribavirin has attracted increasing interest. Recently, we demonstrated a dose-dependent antitumor effect of ribavirin for seven types of malignant glioma cell lines. However, the mechanism underlying the antitumor effect of ribavirin has not yet been fully elucidated. Therefore, the main aim of the present study was to provide further relevant data using two types of malignant glioma cell lines (U-87MG and U-138MG) with different expression of MGMT. Dotted accumulations of γH2AX were found in the nuclei and increased levels of ATM and phosphorylated ATM protein expression were also observed following ribavirin treatment (10 μM of ribavirin, clinical relevant concentration) in both the malignant glioma cells, indicating double-strand breaks as one possible mechanism underlying the antitumor effect of ribavirin. In addition, based on assessements using FACS, ribavirin treatment tended to increase the G0/G1 phase, with a time-lapse, indicating the induction of G0/G1-phase arrest. Furthermore, an increased phosphorylated p53 and p21 protein expression was confirmed in both glioma cells. Additionally, analysis by FACS indicated that apoptosis was induced following ribavirin treatment and caspase cascade, downstream of the p53 pathway, which indicated the activation of both exogenous and endogenous apoptosis in both malignant glioma cell lines. These findings may provide an experimental basis for the clinical treatment of glioblastomas with ribavirin.

ジャーナルOncology Reports
出版ステータスPublished - 2018 2月

ASJC Scopus subject areas

  • 腫瘍学
  • 癌研究


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