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Serebriiskii I , Castello-Cros R , Lamb A , Golemis EA , Cukierman E
Fibroblast-derived 3D matrix differentially regulates the growth and drug-responsiveness of human cancer cells
Matrix Biol. 2008 Jul;27(6) :573-85
PMID: 18411046    PMCID: PMC2603546   
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Recent studies have emphasized the importance of cellular microenvironment in modulating cell growth and signaling. In vitro, collagen matrices, Matrigel, and other synthetic support systems have been used to simulate in vivo microenvironments, and epithelial cells grown in these matrices manifest significant differences in proliferation, differentiation, response to drugs, and other parameters. However, these substrates do not closely resemble the mesenchymal microenvironment that is typically associated with advanced carcinomas in vivo, which is produced to a large extent by fibroblasts. In this study, we have evaluated the ability of a fibroblast-derived three-dimensional matrix to regulate the growth of a panel of 11 human tumor epithelial cell lines. Although proliferative and morphological responses to three-dimensional cues segregated independently, general responsiveness to the matrix correlated with the ability of matrix to influence drug responses. Fibroblast-derived three-dimensional matrix increased beta1-integrin-dependent survival of a subset of human cancer cell lines during taxol treatment, while it sensitized or minimally influenced survival of other cells. beta1-integrin-dependent changes in cell resistance to taxol did not correlate with the degree of modulation of FAK and Akt, implying that additional signaling factors are involved. Based on these results, we propose that these matrices potentially have value as in vitro drug screening platforms.
Serebriiskii, Ilya Castello-Cros, Remedios Lamb, Acacia Golemis, Erica A Cukierman, Edna CA-06927/CA/NCI NIH HHS/United States P50 CA083638/CA/NCI NIH HHS/United States R01 CA113451/CA/NCI NIH HHS/United States R01 CA63366/CA/NCI NIH HHS/United States Evaluation Studies Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Germany Matrix biology : journal of the International Society for Matrix Biology Matrix Biol. 2008 Jul;27(6):573-85. Epub 2008 Mar 6.