Cited by 196Cell Adhesion Molecules ResearchCancer Cells and MetastasisCellular Mechanics and Interactions

Breast Cancer Cells in Three-dimensional Culture Display an Enhanced Radioresponse after Coordinate Targeting of Integrin α5β1 and Fibronectin

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Nam, Jin-Min, Onodera, Yasuhito, Bissell, Mina J., Park, Catherine C.·2010·Cancer Research

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Abstract

Tactics to selectively enhance cancer radioresponse are of great interest. Cancer cells actively elaborate and remodel their extracellular matrix (ECM) to aid in survival and progression. Previous work has shown that β1-integrin inhibitory antibodies can enhance the growth-inhibitory and apoptotic responses of human breast cancer cell lines to ionizing radiation, either when cells are cultured in three-dimensional laminin-rich ECM (3D lrECM) or grown as xenografts in mice. Here, we show that a specific α heterodimer of β1-integrin preferentially mediates a prosurvival signal in human breast cancer cells that can be specifically targeted for therapy. 3D lrECM culture conditions were used to compare α-integrin heterodimer expression in malignant and nonmalignant cell lines. Under these conditions, we found that expression of α5β1-integrin was upregulated in malignant cells compared with nonmalignant breast cells. Similarly, we found that normal and oncofetal splice variants of fibronectin, the primary ECM ligand of α5β1-integrin, were also strikingly upregulated in malignant cell lines compared with nonmalignant acini. Cell treatment with a peptide that disrupts the interactions of α5β1-integrin with fibronectin promoted apoptosis in malignant cells and further heightened the apoptotic effects of radiation. In support of these results, an analysis of gene expression array data from breast cancer patients revealed an association of high levels of α5-integrin expression with decreased survival. Our findings offer preclinical validation of fibronectin and α5β1-integrin as targets for breast cancer therapy. Cancer Res; 70(13); 5238–48. ©2010 AACR.

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Authors
Nam, J.-M., Onodera, Y., Bissell, M. J., & Park, C. C.
Affiliations
Lawrence Berkeley National Laboratory (US)
Corresponding author
Park, Catherine C.
Venue
Cancer Research
Published
2010-06-30
Volume
70
Issue
13
Pages
5238-5248
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2146322233
Cited by
196
References
51
Citations by year
2026: 1 · 2025: 5 · 2024: 9 · 2023: 7 · 2022: 11 · 2021: 9 · 2020: 15 · 2019: 11 · 2018: 21 · 2017: 18 · 2016: 11 · 2015: 15 · 2014: 14 · 2013: 20 · 2012: 14
FWCI
11.17
Type
journal article
Language
en
Open access
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • University of North Texas Digital Library (University of North Texas) (submittedVersion)
Funders
  • Japan Society for the Promotion of Science (22700868)
  • National Cancer Institute (R01CA124891, U54CA126552, U54CA143836, R37CA064786, U01CA143233, R01CA057621, U54CA112970)
Topics
  • Health Sciences › Medicine › Immunology and Allergy › Cell Adhesion Molecules Research
  • Health Sciences › Medicine › Oncology › Cancer Cells and Metastasis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular Mechanics and Interactions
Keywords
breast cancer, alpha5beta1 integrin, fibronectin, radiation response, 3D cell culture, integrin heterodimers, apoptosis, integrin-targeted therapy, patient survival
MeSH terms
Breast Neoplasms, Female, Fibronectins, Humans, Infrared Rays, Middle Aged, Peptides, Tumor Cells, Cultured, Up-Regulation, Gene Expression, Apoptosis, Cell Culture Techniques, Protein Isoforms, Integrin alpha5beta1, Integrin alpha5, Cell Line, Tumor, Oncogene Protein v-akt

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