Cited by 65MicroRNA in disease regulationCancer-related molecular mechanisms researchHead and Neck Cancer Studies

Regulation of the tumour suppressor PDCD4 by miR-499 and miR-21 in oropharyngeal cancers

Open access
Zhang, Xiaoying, Gee, Harriet, Rose, Barbara, Lee, C. Soon, Clark, Jonathan, Elliott, Michael, Gamble, Jennifer R., Cairns, Murray J. +3 more·2016·BMC Cancer

Abstract

BACKGROUND: The rates of oropharyngeal cancers such as tonsil cancers are increasing. The tumour suppressor protein Programmed Cell Death Protein 4 (PDCD4) has been implicated in the development of various human cancers and small RNAs such as microRNAs (miRNAs) can regulate its expression. However the exact regulation of PDCD4 by multiple miRNAs in oropharyngeal squamous cell carcinoma (SCC) is not well understood. RESULTS: Using two independent oropharyngeal SCC cohorts with a focus on the tonsillar region, we identified a miRNA profile differentiating SCC tissue from normal. Both miR-21 and miR-499 were highly expressed in tonsil SCC tissues displaying a loss of PDCD4. Interestingly, expression of the miRNA machinery, Dicer1, Drosha, DDX5 (Dead Box Helicase 5) and DGCR8 (DiGeorge Syndrome Critical Region Gene 8) were all elevated by greater than 2 fold in the tonsil SCC tissue. The 3'UTR of PDCD4 contains three binding-sites for miR-499 and one for miR-21. Using a wild-type and truncated 3'UTR of PDCD4, we demonstrated that the initial suppression of PDCD4 was mediated by miR-21 whilst sustained suppression was mediated by miR-499. Moreover the single miR-21 site was able to elicit the same magnitude of suppression as the three miR-499 sites. CONCLUSION: This study describes the regulation of PDCD4 specifically in tonsil SCC by miR-499 and miR-21 and has documented the loss of PDCD4 in tonsil SCCs. These findings highlight the complex interplay between miRNAs and tumour suppressor gene regulation and suggest that PDCD4 loss may be an important step in tonsillar carcinogenesis.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1186/s12885-016-2109-4

Cites

50 of 50 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Both miR21 and miR499 are highly expressed in tonsil squamous cell carcinoma tissues down-regulating PDCD4 expression.

    “Zhang et al. [61] reported that both miR21 and miR499 are highly expressed in tonsil squamous cell carcinoma (SCC) tissues down-regulating PDCD4 expression.”
  • Besides miR21, many other microRNAs such as miR182, miR16, miR150, and miR499 target PDCD4 mRNA down-regulating PDCD4 expression in different cellular systems.

    “Besides miR21, many other kinds of microRNA such as miR182, miR16, miR150, miR499 and other microRNAs has been shown to target the PDCD4 mRNA down-regulating PDCD4 expression in different cellular systems [58,59,60,61].”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Zhang, X., Gee, H., Rose, B., Lee, C. S., Clark, J., Elliott, M., Gamble, J. R., Cairns, M. J., Harris, A., Khoury, S., & Tran, N.
Affiliations
  • The University of Sydney (AU)
  • Centenary Institute (AU)
  • Hunter Medical Research Institute (AU)
  • Cancer Research UK (GB)
  • University of Technology Sydney (AU)
Corresponding author
Tran, Nham
Venue
BMC Cancer
Published
2016-02-11
Volume
16
Issue
1
Pages
86-86
ISSN
1471-2407 (ISSN-L)
OpenAlex
W2267406668
Cited by
65
References
50
Citations by year
2026: 4 · 2025: 3 · 2024: 3 · 2023: 3 · 2022: 9 · 2021: 6 · 2020: 6 · 2019: 7 · 2018: 11 · 2017: 7 · 2016: 5
FWCI
4.17
Type
journal article
Language
en
Open access
Locations
  • BMC Cancer (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Figshare (submittedVersion, cc-by)
  • UTS ePRESS (University of Technology Sydney) (submittedVersion, cc-by)
  • NOVA (University of Newcastle Australia) (submittedVersion, cc-by)
Funders
  • Cancer Research UK (11359, 16466, 18974)
  • National Institute for Health and Care Research (NF-SI-0611-10163)
  • NIHR Oxford Biomedical Research Centre
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer-related molecular mechanisms research
  • Health Sciences › Medicine › Otorhinolaryngology › Head and Neck Cancer Studies
Keywords
PDCD4, miR-499, miR-21, oropharyngeal squamous cell carcinoma, tonsillar carcinoma, microRNA binding sites, 3' untranslated region, DICER1, Drosha, DDX5, DGCR8, tumor suppressor loss
MeSH terms
Carcinoma, Squamous Cell, Humans, Oropharyngeal Neoplasms, Gene Expression Regulation, Neoplastic, RNA-Binding Proteins, MicroRNAs, Ribonuclease III, Cell Line, Tumor, Cell Proliferation, Apoptosis Regulatory Proteins, DEAD-box RNA Helicases, Carcinogenesis

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review