title: Influence of adhesion molecule expression by human brain microvessel endothelium on cancer cell adhesion.
abstract: Cultures of endothelial (En) cells derived from human brain microvessels were established in order to characterize adhesion molecule expression and to assay the adhesion properties of neoplastic cell lines to monolayers of En cells. Low constitutive expression of beta1 integrin (CD29), and ICAM-2 (CD102) was detected on human brain microvessel En cells. The beta1 chain of the VLA integrin family, ICAM-1, E-selectin (CD62E) and VCAM-1 (CD106) but not ICAM-2 and PECAM-1 (CD31) expression was upregulated by IL1-alpha, and TNF-alpha proinflammatory cytokines. High expression of PECAM-1 was found on non-activated human brain EN cells. In order to study the potential role of adhesion molecules in neoplastic cell adhesion two tumor cell lines were chosen. Adhesion of a cell line (DU145) derived from a cerebral metastasis of prostate carcinoma to human brain microvessel En cell monolayers was less pronounced compared to adhesion of a primary prostate carcinoma cell line (ND1). Adhesion of cerebral metastatic neoplastic cell line (DU145) was not significantly influenced by incubation of endothelial cells with different proinflammatory cytokines. The adhesion capability of primary prostate carcinoma line (NDI) was significantly upregulated by TNF-alpha proinflammatory cytokine. Furthermore, the adhesion of ND1 was partly inhibited using anti-E-selectin and VCAM-1 monoclonal antibodies. There was no significant effect of anti-adhesion antibodies on the adhesion characteristics of the cerebral metastatic (DU145) cell line. Our data demonstrate that different mechanisms are involved in the adhesion of neoplastic cells to cerebral En cells and turn our attention to the importance of adhesion molecule expression in the formation of metastases.
authors.affiliation: Department of Surgery, University of Iowa Hospital and Clinics, Iowa City 52242, USA.
authors.forename: J
authors.initials: J
authors.lastname: Brayton
authors.forename: Z
authors.initials: Z
authors.lastname: Qing
authors.forename: M N
authors.initials: MN
authors.lastname: Hart
authors.forename: J C
authors.initials: JC
authors.lastname: VanGilder
authors.forename: Z
authors.initials: Z
authors.lastname: Fabry
mesh_terms: D000911:Antibodies, Monoclonal / Q000494:pharmacology; D015703:Antigens, CD / Q000032:analysis / Q000096:biosynthesis / Q000276:immunology; D001921:Brain / Q000098:blood supply* / Q000276:immunology*; D001932:Brain Neoplasms / Q000556:secondary; D002196:Capillaries / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D002448:Cell Adhesion / Q000276:immunology; D015815:Cell Adhesion Molecules / Q000032:analysis / Q000096:biosynthesis / Q000276:immunology*; D019040:E-Selectin / Q000032:analysis / Q000096:biosynthesis / Q000276:immunology; D004730:Endothelium, Vascular / Q000737:chemistry / Q000276:immunology* / Q000378:metabolism*; D005434:Flow Cytometry; D006801:Humans; D019012:Integrin beta1 / Q000032:analysis / Q000096:biosynthesis / Q000276:immunology; D018799:Intercellular Adhesion Molecule-1 / Q000032:analysis / Q000096:biosynthesis / Q000276:immunology; D037102:Lectins; D008297:Male; D037121:Plant Lectins; D019408:Platelet Endothelial Cell Adhesion Molecule-1 / Q000032:analysis / Q000096:biosynthesis / Q000276:immunology; D011471:Prostatic Neoplasms / Q000473:pathology / Q000556:secondary; D011485:Protein Binding / Q000276:immunology; D014407:Tumor Cells, Cultured / Q000737:chemistry / Q000166:cytology / Q000276:immunology; D019010:Vascular Cell Adhesion Molecule-1 / Q000032:analysis / Q000096:biosynthesis / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D015815:Cell Adhesion Molecules; D019040:E-Selectin; C065289:ICAM2 protein, human; D019012:Integrin beta1; D037102:Lectins; D037121:Plant Lectins; D019408:Platelet Endothelial Cell Adhesion Molecule-1; C036850:Ulex europaeus lectins; D019010:Vascular Cell Adhesion Molecule-1; D018799:Intercellular Adhesion Molecule-1