| Biophysical control of invasive tumor cell behavior by extracellular matrix microarchitecture. | |
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MedLine Citation:
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PMID: 22405848 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Fibrillar collagen gels, which are used extensively in vitro to study tumor-microenvironment interactions, are composed of a cell-instructive network of interconnected fibers and pores whose organization is sensitive to polymerization conditions such as bulk concentration, pH, and temperature. Using confocal reflectance microscopy and image autocorrelation analysis to quantitatively assess gel microarchitecture, we show that additional polymerization parameters including culture media formulation and gel thickness significantly affect the dimensions and organization of fibers and pores in collagen gels. These findings enabled the development of a three-dimensional culture system in which cell-scale gel microarchitecture was decoupled from bulk gel collagen concentration. Interestingly, morphology and migration characteristics of embedded MDA-MB-231 cells were sensitive to gel microarchitecture independently of collagen gel concentration. Cells adopted a polarized, motile phenotype in gels with larger fibers and pores and a rounded or stellate, less motile phenotype in gels with small fibers and pores regardless of bulk gel density. Conversely, cell proliferation was sensitive to gel concentration but not microarchitecture. These results indicate that cell-scale gel microarchitecture may trump bulk-scale gel density in controlling specific cell behaviors, underscoring the biophysical role of gel microarchitecture in influencing cell behavior. |
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Authors:
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Shawn P Carey; Casey M Kraning-Rush; Rebecca M Williams; Cynthia A Reinhart-King |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-3-8 |
Journal Detail:
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Title: Biomaterials Volume: - ISSN: 1878-5905 ISO Abbreviation: - Publication Date: 2012 Mar |
Date Detail:
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Created Date: 2012-3-12 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8100316 Medline TA: Biomaterials Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 Elsevier Ltd. All rights reserved. |
Affiliation:
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Department of Biomedical Engineering, Cornell University, 302 Weill Hall, 526 Campus Road, Ithaca, NY 14853, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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