Abstract:
:Eukaryotic Initiation Factor 6 (eIF6) controls translation by regulating 80S subunit formation. eIF6 is overexpressed in tumors. Here, we demonstrate that eIF6 inactivation delays tumorigenesis and reduces tumor growth in vivo. eIF6(+/-) mice resist to Myc-induced lymphomagenesis and have prolonged tumor-free survival and reduced tumor growth. eIF6(+/-) mice are also protected by p53 loss. Myc-driven lymphomas contain PKCβII and phosphorylated eIF6; eIF6 is phosphorylated by tumor-derived PKCβII, but not by the eIF4F activator mTORC1. Mutation of PKCβII phosphosite of eIF6 reduces tumor growth. Thus, eIF6 is a rate-limiting controller of initiation of translation, able to affect tumorigenesis and tumor growth. Modulation of eIF6 activity, independent from eIF4F complex, may lead to a therapeutical avenue in tumor therapy.
journal_name
Cancer Celljournal_title
Cancer cellauthors
Miluzio A,Beugnet A,Grosso S,Brina D,Mancino M,Campaner S,Amati B,de Marco A,Biffo Sdoi
10.1016/j.ccr.2011.04.018subject
Has Abstractpub_date
2011-06-14 00:00:00pages
765-75issue
6eissn
1535-6108issn
1878-3686pii
S1535-6108(11)00163-2journal_volume
19pub_type
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