title: Colorectal carcinoma cells (Caco-2) secrete stroma-inducing growth factors in a stroma-oriented direction.
abstract: Understanding of the mechanisms by which epithelial tumor cells induce their supportive stroma in carcinomas is of great general interest for the development of new therapeutic anticancer strategies. In the present study we investigated whether polarized colorectal carcinoma cells (Caco-2) release well-known stroma-inducing factors diffusely or specifically at the stroma-oriented cell pole. We demonstrate that Caco-2 cells secrete vascular endothelial growth factor, tumor necrosis factor alpha and platelet-derived growth factor preferentially towards a basolateral stroma-oriented direction. Other cytokines such as several interleukines, basic fibroblastic growth factor and prostaglandin E2 are not secreted in significant amounts by Caco 2 cells. We conclude that the directed secretion of stroma-regulating factors might play a central role in the regulation of both tumor angiogenesis and tumor invasion in carcinomas with a polarized growth pattern.
authors.affiliation: Department of Pathology, University of Bonn, P.O. Box 2120, 53011 Bonn, Germany.
authors.forename: Eva
authors.initials: E
authors.lastname: Wardelmann
authors.forename: Serafim
authors.initials: S
authors.lastname: Kiriakidis
authors.forename: Stephan
authors.initials: S
authors.lastname: Dreschers
authors.forename: Peter
authors.initials: P
authors.lastname: Behrens
authors.forename: Inge
authors.initials: I
authors.lastname: Heim
authors.forename: Jutta
authors.initials: J
authors.lastname: Krischler
authors.forename: Ulrich
authors.initials: U
authors.lastname: Pfeifer
authors.forename: Nicolas
authors.initials: N
authors.lastname: Wernert
mesh_terms: D018938:Caco-2 Cells; D015179:Colorectal Neoplasms / Q000378:metabolism* / Q000473:pathology; D016228:Endothelial Growth Factors / Q000378:metabolism; D004797:Enzyme-Linked Immunosorbent Assay; D006133:Growth Substances / Q000378:metabolism*; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000378:metabolism; D007378:Interleukins / Q000378:metabolism; D008222:Lymphokines / Q000378:metabolism; D010982:Platelet-Derived Growth Factor / Q000378:metabolism; D017154:Stromal Cells / Q000502:physiology; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors
chemical_list: D016228:Endothelial Growth Factors; D006133:Growth Substances; D036341:Intercellular Signaling Peptides and Proteins; D007378:Interleukins; D008222:Lymphokines; D010982:Platelet-Derived Growth Factor; D014409:Tumor Necrosis Factor-alpha; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors