RRC ID 61251
著者 Uchihara Y, Ueda F, Tago K, Nakazawa Y, Ohe T, Mashino T, Yokota S, Kasahara T, Tamura H, Funakoshi-Tago M.
タイトル Alpha-tocopherol attenuates the anti-tumor activity of crizotinib against cells transformed by NPM-ALK.
ジャーナル PLoS One
Abstract Anaplastic large cell lymphomas (ALCL) are mainly characterized by harboring the fusion protein nucleophosmin-anaplastic lymphoma kinase (NPM-ALK). The ALK inhibitor, crizotinib specifically induced apoptosis in Ba/F3 cells expressing NPM-ALK by inhibiting the activation of NPM-ALK and its downstream molecule, signal transducer and activator of transcription factor 3 (STAT3). We found that α-tocopherol, a major component of vitamin E, attenuated the effects of crizotinib independently of its anti-oxidant properties. Although α-tocopherol suppressed the inhibitory effects of crizotinib on the signaling axis including NPM-ALK and STAT3, it had no influence on the intake of crizotinib into cells. Crizotinib also directly inhibited the kinase activity of NPM-ALK; however, this inhibitory effect was not altered by the co-treatment with α-tocopherol. Whereas the nuclear localization of NPM-ALK was disappeared by the treatment with crizotinib, the co-treatment with α-tocopherol swept the effect of crizotinib and caused the localization of NPM-ALK in nucleus. The administration of α-tocopherol attenuated the anti-tumor activity of crizotinib against NPM-ALK-provoked tumorigenesis in vivo. Furthermore, the α-tocopherol-induced inhibition of crizotinib-caused apoptosis was also observed in NPM-ALK-positive cells derived from ALCL patients, namely, SUDHL-1 and Ki-JK. Collectively, these results not only revealed the novel mechanism underlying crizotinib-induced apoptosis in NPM-ALK-positive cells, but also suggest that the anti-tumor effects of crizotinib are attenuated when it is taken in combination with vitamin E.
巻・号 12(8)
ページ e0183003
公開日 2017-1-1
DOI 10.1371/journal.pone.0183003
PII PONE-D-17-18883
PMID 28806414
PMC PMC5555621
MeSH Animals Antineoplastic Agents / pharmacology* Apoptosis / drug effects Cell Line Cell Line, Transformed Cell Line, Tumor Cell Nucleus / drug effects Cell Nucleus / metabolism Crizotinib Female Humans Lymphoma, Large-Cell, Anaplastic / metabolism Mice, Nude Phosphorylation / drug effects Protein-Tyrosine Kinases / metabolism* Pyrazoles / pharmacology* Pyridines / pharmacology* Reactive Oxygen Species / metabolism Subcellular Fractions / metabolism alpha-Tocopherol / pharmacology*
IF 2.74
リソース情報
ヒト・動物細胞 Ba/F3(RCB0805)