Cited by 44MicroRNA in disease regulationWnt/β-catenin signaling in development and cancerCancer-related molecular mechanisms research

WNT7A Regulation by miR-15b in Ovarian Cancer

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MacLean, James A., King, Mandy L., Okuda, Hiroshi, Hayashi, Kanako·2016·PLOS ONE

Abstract

WNT signaling is well known to play an important role in the regulation of development, cell proliferation and cell differentiation in a wide variety of normal and cancerous tissues. Despite the wealth of knowledge concerning when and where various WNT genes are expressed and downstream events under their control, there is surprisingly little published evidence of how they are regulated. We have recently reported that aberrant WNT7A is observed in serous ovarian carcinomas, and WNT7A is the sole ligand accelerating ovarian tumor progression through CTNNB1 (β-catenin)/TCF signaling in the absence of CTNNB1 mutations. In the present study, we report that WNT7A is a direct target of miR-15b in ovarian cancer. We showed that a luciferase reporter containing the putative binding site of miR-15b in the WNT7A 3'-UTR was significantly repressed by miR-15b. Mutation of the putative binding site of miR-15b in the WNT7A 3'-UTR restored luciferase activity. Furthermore, miR-15b was able to repress increased levels of TOPFLASH activity by WNT7A, but not those induced by S33Y. Additionally, miR-15b dose-dependently decreased WNT7A expression. When we evaluated the prognostic impact of WNT7A and miR-15b expression using TCGA datasets, a significant inverse correlation in which high-expression of WNT7A and low-expression of miR-15b was associated with reduced survival rates of ovarian cancer patients. Treatment with decitabine dose-dependently increased miR-15b expression, and silencing of DNMT1 significantly increased miR-15b expression. These results suggest that WNT7A is post-transcriptionally regulated by miR-15b, which could be down-regulated by promoter hypermethylation, potentially via DNMT1, in ovarian cancer.

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Crossref · 10.1371/journal.pone.0156109

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  • In glioma cells, MGF upregulates miR-15b, which induces apoptosis by downregulating WNT7A.

    “In glioma cells, MGF upregulates miR-15b, which induces apoptosis by downregulating the expression of oncogenic targets such as WNT7A (37,64).”

    From Mangiferin in human disease: Multifaceted mechanisms and applications (Review) (2026) · cites this paper as [64]

    The Results section, “WNT7A is a direct target of miR-15b” (page unavailable), reports that miR-15b decreased WNT7A expression in ovarian cancer cells. The paper does not establish that MGF upregulates miR-15b in glioma cells or that WNT7A downregulation induces apoptosis; those parts of the claim are unsupported. (LLM, conf=0.89)

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Authors
MacLean, J. A., King, M. L., Okuda, H., & Hayashi, K.
Affiliations
  • Southern Illinois University Carbondale (US)
  • Kyoto University (JP)
Corresponding author
Hayashi, Kanako
Venue
PLOS ONE
Published
2016-05-19
Volume
11
Issue
5
Pages
e0156109
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2397092993
Cited by
43
References
28
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 4 · 2022: 3 · 2021: 3 · 2020: 6 · 2019: 8 · 2018: 10 · 2017: 4 · 2016: 2
FWCI
3.33
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Institutional Repositories DataBase (IRDB) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
  • Kyoto University Research Information Repository (Kyoto University) (submittedVersion, cc-by)
Funders
National Institutes of Health (CA179214)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Wnt/β-catenin signaling in development and cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer-related molecular mechanisms research
Keywords
Wnt7a, miR-15b, ovarian cancer, Wnt signaling, post-transcriptional regulation, 3' untranslated region, miRNA target genes, decitabine, DNMT1, promoter hypermethylation, serous ovarian cancer, prognostic factors, patient survival
MeSH terms
Female, Humans, Mutation, Ovarian Neoplasms, Gene Expression Regulation, Neoplastic, 3' Untranslated Regions, MicroRNAs, Cell Line, Tumor, Wnt Proteins

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