The impact of adhesion peptides within hydrogels on the phenotype and signaling of normal and cancerous mammary epithelial cells

Michael S. Weiss, Beatriz Peñalver Bernabé, Ariella Shikanov, Dennis A. Bluver, Michael D. Mui, Seungjin Shin, Linda J. Broadbelt, Lonnie D. Shea*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

The microenviroment contributes to directing mammary epithelial cell (MEC) development and the progression of breast cancer. Three-dimensional culture models have been used to support formation of structures that display varying degrees of disorganization that parallel the degree of cancer. Synthetic hydrogels were employed to investigate the mechanisms by which specific adhesion signals in the microenvironment directed development. Polyethylene glycol-based hydrogels supported 3D growth of MECs and directed formation of a range of phenotypes that were functions of genotype, and identity and concentration of adhesion peptides RGD and YIGSR. Non-cancerous and cancerous MECs responded differentially to the same adhesion cues and produced variable structural organizations. An analysis of dynamic signaling pathways revealed differential activities of transcription factors within the MAPK and JAK/STAT pathways in response to genotype and adhesion. These results directly implicate adhesion in cancer development and demonstrate that AP1, CREB, STAT1, and STAT3 all contribute to the genotype dependence of cellular response to adhesion peptides. The tools presented in this work could be applied to other systems and connect extracellular cues with intracellular signaling to molecularly dissect tissue development and further biomaterials development.

Original languageEnglish (US)
Pages (from-to)3548-3559
Number of pages12
JournalBiomaterials
Volume33
Issue number13
DOIs
StatePublished - May 2012

Funding

Viability measurements were made at the Northwestern University High Throughput Analysis Laboratory, confocal microscopy was performed at the Northwestern University Biological Imaging Facility, and bioluminescence imaging was performed at the Northwestern University Center for Advanced Molecular Imaging. We thank M. Dimri and the labs of H. Band and V. Band (University of Nebraska) for assistance with BME culture, A. Garcia (Georgia Institute of Technology) and J. Shepard for helpful discussions, and S. Seidlits for synthesis of PEG-VS. This work was funded by the National Institutes of Health (NIH; R21CA125285 , UL1DE019587 , PL1EB008542 , which supports the Biomaterials core of the Oncofertility Consortium Roadmap Grant) and the Chicago Biomedical Consortium with support from the Searle Funds at The Chicago Community Trust ,. MSW and BPB were both supported by an NIH training grant ( T32GM008449 ) and AS was supported by a Baxter Early Career Development Award.

Keywords

  • Adhesion
  • Cell signaling
  • Hydrogel
  • Signal transducing mediator

ASJC Scopus subject areas

  • Mechanics of Materials
  • Ceramics and Composites
  • Bioengineering
  • Biophysics
  • Biomaterials

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