Cited by 226DNA and Nucleic Acid ChemistryGenomics and Chromatin DynamicsEpigenetics and DNA Methylation

Landscape of G-quadruplex DNA structural regions in breast cancer

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Hänsel-Hertsch, Robert, Simeone, Angela, Shea, Abigail, Hui, Winnie W. I., Zyner, Katherine G., Marsico, Giovanni, Rueda, Oscar M., Bruna, Alejandra +6 more·2020·Nature Genetics

Abstract

Response and resistance to anticancer therapies vary due to intertumor and intratumor heterogeneity 1. Here, we map differentially enriched G-quadruplex (G4) DNA structure-forming regions (∆G4Rs) in 22 breast cancer patient-derived tumor xenograft (PDTX) models. ∆G4Rs are associated with the promoters of highly amplified genes showing high expression, and with somatic single-nucleotide variants. Differences in ΔG4R landscapes reveal seven transcription factor programs across PDTXs. ∆G4R abundance and locations stratify PDTXs into at least three G4-based subtypes. ∆G4Rs in most PDTXs (14 of 22) were found to associate with more than one breast cancer subtype, which we also call an integrative cluster (IC)2. This suggests the frequent coexistence of multiple breast cancer states within a PDTX model, the majority of which display aggressive triple-negative IC10 gene activity. Short-term cultures of PDTX models with increased ∆G4R levels are more sensitive to small molecules targeting G4 DNA. Thus, G4 landscapes reveal additional IC-related intratumor heterogeneity in PDTX biopsies, improving breast cancer stratification and potentially identifying new treatment strategies.

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  • G4-associated intratumor heterogeneity exists in breast cancer patient-derived tumor xenografts beyond current classifications.

    “as a recent study revealed G4-associated intratumor heterogeneity in breast cancer patient-derived tumor xenografts beyond current classifications (90).”

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Authors
Hänsel-Hertsch, R., Simeone, A., Shea, A., Hui, W. W. I., Zyner, K. G., Marsico, G., Rueda, O. M., Bruna, A., Martin, A., Zhang, X., Adhikari, S., Tannahill, D., Caldas, C., & Balasubramanian, S.
Affiliations
  • University of Cambridge (GB)
  • Institute of Cancer Research (GB)
Corresponding author
Balasubramanian, Shankar
Venue
Nature Genetics
Published
2020-08-03
Volume
52
Issue
9
Pages
878-883
ISSN
  • 1061-4036 (ISSN-L)
  • 1546-1718
OpenAlex
W3047068833
Cited by
223
References
37
Citations by year
2026: 24 · 2025: 35 · 2024: 42 · 2023: 39 · 2022: 27 · 2021: 48 · 2020: 8
FWCI
9.97
Type
journal article
Language
en
Open access
Locations
  • Nature Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • Kölner Universitäts PublikationsServer (Universität zu Köln) (publishedVersion)
  • Apollo (University of Cambridge) (submittedVersion)
  • Apollo
Funders
  • Cancer Research UK (C9681/A18618, C9681/A29214, C14303/A17197)
  • Wellcome Trust (209441/z/17/z)
  • University of Cologne | Center for Molecular Medicine Cologne, University of Cologne (2635020301)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
Keywords
G-quadruplex, breast cancer, patient-derived xenografts, intratumoral heterogeneity, triple-negative breast cancer, gene amplification, somatic single nucleotide variants, tumor stratification, drug sensitivity
MeSH terms
Breast Neoplasms, DNA, Female, Gene Expression Regulation, Humans, Promoter Regions, Genetic, Transcription Factors, G-Quadruplexes

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