Cited by 36Breast Cancer Treatment StudiesEstrogen and related hormone effectsBreast Lesions and Carcinomas

The DOI matches its Crossref record; 79 of the 80 references it cites were found in a registry or an index.

Elevation of SIPL1 (SHARPIN) Increases Breast Cancer Risk

Open access
De Melo, Jason, Tang, Damu·2015·PLOS ONE

Abstract

SIPL1 (Sharpin) or Sharpin plays a role in tumorigenesis. However, its involvement in breast cancer tumorigenesis remains largely unknown. To investigate this issue, we have systemically analyzed SIPL1 gene amplification and expression data available from Oncomine datasets, which were derived from 17 studies and contained approximately 20,000 genes, 3438 breast cancer cases, and 228 normal individuals. We found a SIPL1 gene amplification in invasive ductal breast cancers compared to normal breast tissues and a significant elevation of SIPL1 mRNA in breast cancers in comparison to non-tumor breast tissues. These results collectively reveal that increases in SIPL1 expression occur during breast cancer tumorigenesis. To further investigate this association, we observed increases in the SIPL1 gene and mRNA in the breast cancer subtypes of estrogen receptor (ER)+, progesterone receptor (PR)+, HER2+, or triple negative. Additionally, a gain of the SIPL1 gene correlated with breast cancer grade and the levels of SIPL1 mRNA associated with both breast cancer stages and grades. Elevation of SIPL1 gene copy and mRNA is linked to a decrease in patient survival, especially for those with PR+, ER+, or HER2- breast cancers. These results are supported by our analysis of SIPL1 protein expression using a tissue microarray containing 224 breast cancer cases, in which higher levels of SIPL1 relate to ER+ and PR+ tumors and AKT activation. Furthermore, we were able to show that progesterone significantly reduced SIPL1 mRNA and protein expression in MCF7 cells. As progesterone enhances breast cancer tumorigenesis in a context dependent manner, inhibition of SIPL1 expression may contribute to progesterone's non-tumorigenic function which might be countered by SIPL1 upregulation. Taken together, we demonstrate a positive correlation of SIPL1 with BC tumorigenesis.

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Crossref · 10.1371/journal.pone.0127546

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  • SHARPIN gene amplification and protein overexpression has been observed in several human cancer types.

    “SHARPIN gene amplification and protein overexpression has been observed in several human cancer types (Fig. S1A) (Bii et al., 2015, De Melo & Tang, 2015, He et al., 2010, Jung et al., 2010).”

    From SHARPIN S146 phosphorylation mediates ARP2/3 interaction, cancer cell invasion and metastasis (2022) · cites this paper as De Melo & Tang, 2015

    The Results sections on SIPL1 gene amplification and protein expression report increased gene copy number in breast cancer and higher protein levels in certain breast tumors. The paper does not establish that both findings have been observed across several distinct human cancer types; its reported analyses focus on breast cancer and its subtypes. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • SHARPIN gene is amplified in a variety of human cancers.

    “SHARPIN gene is amplified, and at the protein level it is overexpressed in a variety of human cancers (Fig. S1A)”

    From SHARPIN S146 phosphorylation mediates ARP2/3 interaction, cancer cell invasion and metastasis (2022) · cites this paper as De Melo & Tang, 2015

    The Results section, “Amplification of the SIPL1 gene in breast cancer” (page not provided), reports increased SHARPIN/SIPL1 gene copy number in breast cancer, including several breast cancer subtypes. It does not establish amplification across a variety of distinct human cancers. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • SHARPIN protein is overexpressed in a variety of human cancers.

    “SHARPIN gene is amplified, and at the protein level it is overexpressed in a variety of human cancers (Fig. S1A)”

    From SHARPIN S146 phosphorylation mediates ARP2/3 interaction, cancer cell invasion and metastasis (2022) · cites this paper as De Melo & Tang, 2015

    The Introduction (page not available) reports SIPL1/SHARPIN upregulation in ovarian, renal-cell, and cervical cancers. The Results section on protein expression (page not available) detects SHARPIN protein in breast carcinomas, but does not establish protein overexpression across those other cancer types. The claim is therefore supported for upregulation across several cancers, not specifically for protein-level overexpression across them. (LLM, conf=0.84)

    Experimental — accuracy not yet measured

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Metadata

Authors
De Melo, J., & Tang, D.
Affiliations
St. Joseph’s Healthcare Hamilton (CA)
Corresponding author
Tang, Damu
Venue
PLOS ONE
Published
2015-05-19
Volume
10
Issue
5
Pages
e0127546
ISSN
1932-6203 (ISSN-L)
OpenAlex
W227156250
Cited by
33
References
80
Citations by year
2025: 1 · 2024: 1 · 2023: 1 · 2022: 4 · 2021: 1 · 2020: 3 · 2019: 6 · 2018: 3 · 2017: 8 · 2016: 3 · 2015: 2
FWCI
1.76
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
Canadian Institutes of Health Research (107971)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Breast Cancer Treatment Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Endocrinology › Estrogen and related hormone effects
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Breast Lesions and Carcinomas
Keywords
SHARPIN, breast cancer, carcinogenesis, gene amplification, mRNA expression, breast cancer subtypes, progesterone receptor, estrogen receptor, HER2, triple-negative breast cancer, Akt activation, progesterone, MCF-7 cells, patient survival, tumor grade
MeSH terms
Breast Neoplasms, Female, Gene Amplification, Humans, Risk Factors, RNA, Messenger, Ubiquitins, Up-Regulation, Survival Rate, Disease Progression, MCF-7 Cells

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