title: Neutrophils influence melanoma adhesion and migration under flow conditions.
abstract: We have studied human melanoma cell (C8161) adhesion and migration in response to stimulation by soluble collagen IV (CIV) using a modified Boyden chamber. In this modified chamber, shear flow can be introduced over the cell-substrate interface, affecting tumor cell chemotactic migration through a microporous filter. A relatively high level of intercellular adhesion molecule-1 (ICAM-1) was found on C8161 cells. In contrast, levels of beta(2)-integrins (e.g., LFA-1 and Mac-1), the molecules that would be necessary for C8161 stable adhesion to the endothelium substrate, were found to be very low on these melanoma cells. As a result, C8161 transendothelial migration under a flow condition of 4 dyn/cm(2) decreased by 70% as compared to static migration. When human neutrophils (PMNs) were present in the tumor cell suspension, C8161 migration recovered by 85% over C8161 cells alone under the 4 dyn/cm(2) flow condition. Blocking ICAM-1 on C8161 cells or Mac-1 on PMNs significantly inhibited C8161-PMN adhesion and subsequent C8161 migration through the endothelium under flow conditions. In addition, increased interleukin-8 production and Mac-1 expression by PMNs were detected when they were co-cultured with C8161 melanoma cells. These results suggest that transmigration of C8161 cells under flow conditions can be influenced by PMNs, mediated by Mac-1/ICAM-1 adhesive interactions and enhanced by altered cytokine production.
authors.affiliation: Department of Bioengineering and The Huck Institute for Life Sciences, The Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Margaret J
authors.initials: MJ
authors.lastname: Slattery
authors.forename: Cheng
authors.initials: C
authors.lastname: Dong
mesh_terms: D000328:Adult; D018845:CD11 Antigens / Q000502:physiology; D018821:CD18 Antigens / Q000502:physiology; D002448:Cell Adhesion; D002450:Cell Communication / Q000502:physiology; D002465:Cell Movement; D002470:Cell Survival; D002478:Cells, Cultured; D016207:Cytokines / Q000378:metabolism; D017931:DNA Primers / Q000737:chemistry; D004730:Endothelium, Vascular / Q000166:cytology; D004797:Enzyme-Linked Immunosorbent Assay; D005434:Flow Cytometry; D006801:Humans; D018799:Intercellular Adhesion Molecule-1 / Q000378:metabolism; D016169:Lymphocyte Function-Associated Antigen-1 / Q000378:metabolism; D016177:Macrophage-1 Antigen / Q000378:metabolism; D008545:Melanoma / Q000378:metabolism / Q000473:pathology*; D009504:Neutrophils / Q000502:physiology*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012878:Skin Neoplasms / Q000378:metabolism / Q000473:pathology*
chemical_list: D018845:CD11 Antigens; D018821:CD18 Antigens; D016207:Cytokines; D017931:DNA Primers; D016169:Lymphocyte Function-Associated Antigen-1; D016177:Macrophage-1 Antigen; D018799:Intercellular Adhesion Molecule-1