title: Co-cultures of human coronary smooth muscle cells and dimethyl sulfoxide-differentiated HL60 cells upregulate ProMMP9 activity and promote mobility-modulation by reactive oxygen species.
abstract: Vascular cells and leukocytes, involved in the development of atherosclerosis, produce cytokines and/or reactive oxygen species (ROS) and matrix metalloproteinases (MMPs) implicated in cell mobility. We investigated by co-culture experiments the effects of human coronary smooth muscle cells (HCSMC) on MMPs characteristics and mobility of neutrophil-like dimethyl sulfoxide-differentiated HL60 cells (not equal HL60). The effects of superoxide dismutase (SOD) and catalase were also analyzed. All the studied MMP2 characteristics remained unchanged. HCSMC stimulated MMP9 protein level, activity and mobility of not equal HL60 cells and expressed and secreted a variety of cytokines implicated in atherosclerosis. SOD and catalase increased MMP9 expression, protein level and activity of not equal HL60, but migration of not equal HL60 cells was only decreased by catalase, demonstrating that ROS are more efficient in modulating MMP9 activity of not equal HL60 than their mobility. Finally, HCSMC being able to stimulate not equal HL60, their co-cultures may represent an in vitro approach to study cellular interactions occurring in vivo during atherosclerosis.
authors.affiliation: Life Sciences Research Unit, Université du Luxembourg, 162a, Avenue de la Faïencerie, 1511 Luxembourg, Luxembourg.
authors.forename: Yohann
authors.initials: Y
authors.lastname: Bernard
authors.forename: Chantal
authors.initials: C
authors.lastname: Melchior
authors.forename: Eric
authors.initials: E
authors.lastname: Tschirhart
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Bueb
mesh_terms: D000975:Antioxidants / Q000378:metabolism; D050197:Atherosclerosis / Q000378:metabolism*; D002478:Cells, Cultured; D018920:Coculture Techniques; D004121:Dimethyl Sulfoxide / Q000494:pharmacology*; D015971:Gene Expression Regulation, Enzymologic; D018922:HL-60 Cells; D006801:Humans; D007249:Inflammation; D020780:Matrix Metalloproteinase 9 / Q000378:metabolism*; D008954:Models, Biological; D009206:Myocardium / Q000378:metabolism*; D032389:Myocytes, Smooth Muscle / Q000166:cytology*; D018384:Oxidative Stress; D012333:RNA, Messenger / Q000378:metabolism
chemical_list: D000975:Antioxidants; D012333:RNA, Messenger; D020780:Matrix Metalloproteinase 9; D004121:Dimethyl Sulfoxide