Cited by 530Cervical Cancer and HPV ResearchCancer-related Molecular PathwaysViral-associated cancers and disorders

The DOI matches its Crossref record; 85 of the 85 references it cites were found in a registry or an index; none of the 73 sources its claims cite is checked for support yet.

Basic mechanisms of high‐risk human papillomavirus‐induced carcinogenesis: Roles of E6 and E7 proteins

Open access
Narisawa‐Saito, Mako, Kiyono, Tohru·2007·Cancer Science

Abstract

Human papillomaviruses (HPV) are believed to be the primary causal agents for development of pre‐neoplastic and malignant lesions of the uterine cervix, and high‐risk types such as type 16 and 18 are associated with more than 90% of all cervical carcinomas. The E6 and E7 genes of HPV are thought to play causative roles, since E6 promotes the degradation of p53 through its interaction with E6AP, an E3 ubiquitin ligase, whereas E7 binds to the retinoblastoma protein (pRb) and disrupts its complex formation with E2F transcription factors. Although prophylactic vaccines have become available, it is still necessary to clarify the mechanisms of HPV‐induced carcinogenesis because of the widespread nature of HPV infection. Approximately 493 000 new cases of cervical cancer are diagnosed each year with approximately 274 000 mortalities due to invasive cervical cancer. In the present article, the mechanisms of HPV16 E6‐ and E7‐induced multistep carcinogenesis and recently identified functions of these onco‐proteins are reviewed. (Cancer Sci 2007; 98: 1505–1511)

Overview

CoChat Summary

Written by AI from the paper’s full text.

TL;DR

This review summarizes how high-risk HPV E6 and E7 oncoproteins drive cervical carcinogenesis by inactivating p53 and pRb family proteins and by targeting additional cellular pathways. It emphasizes that overexpression of E6/E7, usually after viral integration, is a bottleneck step that cooperates with further genetic and epigenetic changes.

Key findings

  • High-risk HPV types (16, 18, 31, 33, 45, 51, 52, 58, etc.) are associated with more than 90% of cervical cancers; HPV16 accounts for approximately half and HPV18 for another 10–20%. Approximately 493,000 new cervical cancer cases and 274,000 deaths occur annually.
  • E6 promotes degradation of p53 through interaction with E6AP, an E3 ubiquitin ligase, while E7 binds pRb family proteins and disrupts pRb–E2F complexes; together they cause polyploidy and genomic instability.
  • E6 has p53-independent functions, including hTERT/telomerase induction and degradation of PDZ-domain proteins such as DLG, Scribble, MUPP1, MAGI-1/-2/-3, GIPC, PATJ, PTPN3, and PSD95; E7 targets many proteins including p27, p21, p600, and PP2A.
  • Integration and high-level E6/E7 expression are proposed as the bottleneck step; additional events reported in cervical cancers include PIK3CA, c-myc, ErbB2, and cIAP1 amplification, ras mutation, and decreased PTEN and TSLC1 expression.

Methods

  • Narrative review; no primary experimental data, sample, or systematic analysis are reported.
  • Synthesizes published literature and the authors’ recent work on HPV16 E6- and E7-induced multistep carcinogenesis, the HPV life cycle, and target proteins of E6 and E7 (Table 1; Figs 1–5).

Limitations

  • The paper does not state formal limitations; it notes that further exploration is needed for TSC2/Tuberin as a possible E6 target.
  • Evident from the text: this is a narrative review without stated systematic search or inclusion criteria, and some mechanistic claims rely on cited reviews, speculation, or a personal communication (A. Suhrbier, 2007) regarding E7-mediated pRb cleavage.

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Integrity signals

Registry

Crossref · 10.1111/j.1349-7006.2007.00546.x

Cites

85 of 85 references verified0 citation errors · 0 not checkable

Statistics

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Verification

Claims the paper makes

57 Sources not found · 14 Own interpretation

  • Probably not a substantial claim. 9
  • It may state two separate claims as one. 18

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Self-check

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Citations

Cites

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Cited by

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Metadata

Authors
Narisawa‐Saito, M., & Kiyono, T.
Affiliations
National Cancer Center Research Institute (JP)
Corresponding author
Kiyono, Tohru
Venue
Cancer Science
Publisher
Wiley
Published
2007-07-23
Volume
98
Issue
10
Pages
1505-1511
ISSN
  • 1347-9032 (ISSN-L)
  • 1349-7006
OpenAlex
W2011499737
Cited by
528
References
85
Citations by year
2026: 13 · 2025: 27 · 2024: 46 · 2023: 24 · 2022: 33 · 2021: 43 · 2020: 32 · 2019: 24 · 2018: 36 · 2017: 27 · 2016: 23 · 2015: 25 · 2014: 25 · 2013: 26 · 2012: 27
FWCI
2.56
Type
journal article
Language
en
Open access
Locations
  • Cancer Science (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (publishedVersion)
Topics
  • Health Sciences › Medicine › Epidemiology › Cervical Cancer and HPV Research
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Health Sciences › Medicine › Oncology › Viral-associated cancers and disorders
Keywords
human papillomavirus, HPV16, HPV 18, cervical cancer, carcinogenesis, E6 oncoprotein, E7 oncoprotein, p53 degradation, UBE3A, retinoblastoma protein, E2F transcription factors, viral oncogenesis, HPV vaccine
MeSH terms
Cell Transformation, Neoplastic, Cell Transformation, Viral, Uterine Cervical Neoplasms, Female, Humans, Oncogene Proteins, Viral, Repressor Proteins, Papillomaviridae, Papillomavirus Infections, Papillomavirus E7 Proteins

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