title: Oxidized Lipoprotein as a Major Vessel Cell Proliferator in Oxidized Human Serum.
abstract: Oxidative stress is correlated with the incidence of several diseases such as atherosclerosis and cancer, and oxidized biomolecules have been determined as biomarkers of oxidative stress; however, the detailed molecular relationship between generated oxidation products and the promotion of diseases has not been fully elucidated. In the present study, to clarify the role of serum oxidation products in vessel cell proliferation, which is related to the incidence of atherosclerosis and cancer, the major vessel cell proliferator in oxidized human serum was investigated. Oxidized human serum was prepared by free radical exposure, separated using gel chromatography, and then each fraction was added to several kinds of vessel cells including endothelial cells and smooth muscle cells. It was found that a high molecular weight fraction in oxidized human serum specifically induced vessel cell proliferation. Oxidized lipids were contained in this high molecular weight fraction, while cell proliferation activity was not observed in oxidized lipoprotein-deficient serum. Oxidized low-density lipoproteins induced vessel cell proliferation in a concentration-dependent manner. Taken together, these results indicate that oxidized lipoproteins containing lipid oxidation products function as a major vessel cell proliferator in oxidized human serum. These findings strongly indicate the relevance of determination of oxidized lipoproteins and lipid oxidation products in the diagnosis of vessel cell proliferation-related diseases such as atherosclerosis and cancer.
authors.affiliation: Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan.
authors.forename: Yoshiro
authors.identifier: http://orcid.org/0000-0002-0559-5889
authors.initials: Y
authors.lastname: Saito
authors.affiliation: Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan.
authors.forename: Noriko
authors.initials: N
authors.lastname: Noguchi
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D001391:Azo Compounds / Q000494:pharmacology; D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D005591:Chemical Fractionation; D002850:Chromatography, Gel; D042783:Endothelial Cells / Q000166:cytology / Q000187:drug effects*; D005609:Free Radicals / Q000494:pharmacology; D006801:Humans; D007093:Imidazoles / Q000494:pharmacology; D015227:Lipid Peroxidation / Q000187:drug effects; D008077:Lipoproteins, LDL / Q000494:pharmacology*; D032389:Myocytes, Smooth Muscle / Q000166:cytology / Q000187:drug effects*; D018384:Oxidative Stress; D044967:Serum / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; D001391:Azo Compounds; D005609:Free Radicals; D007093:Imidazoles; D008077:Lipoproteins, LDL; C037239:Sephacryl Superfine; C430118:VA 061; C099252:oxidized low density lipoprotein