Cited by 21RNA and protein synthesis mechanismsPI3K/AKT/mTOR signaling in cancerRNA modifications and cancer

Deep computational analysis details dysregulation of eukaryotic translation initiation complex eIF4F in human cancers

Open access
Wu, Su, Wagner, Gerhard·2021·Cell Systems

Abstract

eIF4F plays diverse roles in human cancers, which complicate the development of an overarching understanding of its functional and regulatory impacts across tumor types. Typically, eIF4F drives initiation from the mRNA 5' end (cap) and is composed of eIF4G1, eIF4A1, and cap-binding eIF4E. Cap-independent initiation is possible without eIF4E, from internal ribosomal entry sites (IRESs). By analyzing large public datasets, we found that cancers selectively overexpress EIF4G1 more than EIF4E. That expression imbalance supports EIF4G1 as a prognostic indicator in patients with cancer. It also attenuates "housekeeping" pathways that are usually regulated in a tissue-specific manner via cap-dependent initiation in healthy tissues and reinforce regulation of cancer-preferred pathways in cap-independent contexts. Cap-independent initiation is mechanistically attributable to eIF4G1 hyperphosphorylation that promotes binding to eIF4A1 and reduced eIF4E availability. Collectively, these findings reveal a novel model of dysregulated eIF4F function and highlight the clinical relevance of cap-(in)dependent initiation in cancer.

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  • Elevated EIF4G1 mRNA levels correlate with poor survival in patients with MFS and those with UPS.

    “Elevated EIF4G1 mRNA levels correlate with poor survival in patients with MFS and those with UPS, consistent with findings from a previous study (41).”

    From Targeting eIF4A-dependent translation in genetically complex sarcoma (2026) · cites this paper as [41]

    The Results section, “EIF4G1 Expression Is a Strong Predictor for Survival in Patients with Cancer” (page unavailable), links high EIF4G1 expression to worse survival across TCGA cancer types combined and separately in lung adenocarcinoma. It does not report this association specifically for patients with MFS or UPS, so it supports the general finding but not the claimed populations. (LLM, conf=0.88)

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Authors
Wu, S., & Wagner, G.
Affiliations
Harvard University (US)
Corresponding author
  • Wu, Su
  • Wagner, Gerhard
Venue
Cell Systems
Publisher
Elsevier BV
Published
2021-09
Volume
12
Issue
9
Pages
907-923.e6
ISSN
2405-4712 (ISSN-L)
OpenAlex
W3190569063
Cited by
20
References
90
Citations by year
2026: 3 · 2025: 3 · 2024: 7 · 2023: 1 · 2022: 6
FWCI
1.10
Type
journal article
Language
en
Open access
Locations
  • Cell Systems (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Cancer Institute (5R01AI037581-25, 5R01CA200913-05)
  • NIGMS
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA modifications and cancer
Keywords
eIF4F, translation initiation, eIF4G1, eIF4E, eIF4A1, internal ribosome entry site, protein phosphorylation, cancer, prognostic factors, mRNA 5' cap, tumor-specific gene expression
MeSH terms
Humans, Neoplasms, Protein Biosynthesis, Eukaryotic Initiation Factor-4F, Eukaryotic Initiation Factor-4G, Eukaryota

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