Ribavirin targets eIF4E dependent Akt survival signaling.
Ribavirin targets eIF4E dependent Akt survival signaling.
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DOI:
10.1016/j.bbrc.2008.07.163
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发表时间:
2008-10-24
影响因子:
3.1
通讯作者:
Borden, Katherine L. B.
中科院分区:
文献类型:
--
作者:
Tan, Keith;Culjkovic, Bijana;Amri, Abdellatif;Borden, Katherine L. B.
The eukaryotic translation initiation factor eIF4E is dysregulated in many cancers. eIF4E, through its mRNA export and translation functions, combinatorially modulates the expression of genes involved in Akt dependent survival signaling. For these activities, eIF4E must bind the 7-methyl guanosine (m7G) cap moiety on the 5’end of mRNAs. We demonstrate that a physical mimic of the m7G cap, ribavirin, inhibits eIF4E dependent Akt survival signaling. Specifically, ribavirin impairs eIF4E mediated Akt activation via inhibiting the production of an upstream activator of Akt, NBS1. Consequently, ribavirin impairs eIF4E dependent apoptotic rescue. A ribavirin analogue with distinct physico-chemical properties, tiazofurin, does not impair eIF4E activity indicating that only analogues that mimic the m7G cap will inhibit eIF4E function. Ribavirin represents a first-in-class strategy to inhibit eIF4E dependent cancers, through competition for m7G cap binding. Thus, ribavirin coordinately impairs eIF4E dependent pathways and thereby, potently inhibits its biological effects.
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DOI:
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影响因子:
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