title: S100B: a multifunctional role in cardiovascular pathophysiology.
abstract: S100B, a calcium-binding protein of the EF-hand type exerts both intracellular and extracellular functions. S100B is induced in the myocardium of human subjects and an experimental rat model following myocardial infarction. Forced expression of S100B in neonatal rat myocyte cultures, and high level expression of S100B in transgenic mice hearts and aortic smooth muscle cells inhibit cardiac hypertrophy and the associated phenotype, arterial smooth muscle proliferation, respectively, but demonstrate increased apoptosis following α(1)-adrenergic stimulation or myocardial infarction. Knocking out S100B, augmented hypertrophy, decreased apoptosis and preserved cardiac function following myocardial infarction. S100B induces apoptosis by an extracellular mechanism by interacting with the receptor for advanced glycation end products and activating ERK1/2 and p53 signaling. The intracellular, and extracellular, roles of S100B are attractive therapeutic targets for the treatment of both cardiac and vascular disease.
authors.affiliation: Division of Cardiology, Department of Medicine, Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, University of Toronto, 30 Bond St., Toronto, ON, Canada.
authors.forename: James N
authors.initials: JN
authors.lastname: Tsoporis
authors.forename: Forough
authors.initials: F
authors.lastname: Mohammadzadeh
authors.forename: Thomas G
authors.initials: TG
authors.lastname: Parker
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000235:genetics; D006332:Cardiomegaly / Q000235:genetics / Q000378:metabolism; D002318:Cardiovascular Diseases / Q000378:metabolism*; D006801:Humans; D051379:Mice; D008822:Mice, Transgenic; D048052:Mitogen-Activated Protein Kinase 3 / Q000378:metabolism; D009203:Myocardial Infarction / Q000378:metabolism; D009206:Myocardium / Q000378:metabolism*; D009414:Nerve Growth Factors / Q000502:physiology*; D051381:Rats; D000067759:Receptor for Advanced Glycation End Products; D011971:Receptors, Immunologic / Q000378:metabolism; D064568:S100 Calcium Binding Protein beta Subunit; D009418:S100 Proteins / Q000502:physiology*; D015398:Signal Transduction
chemical_list: D009414:Nerve Growth Factors; D000067759:Receptor for Advanced Glycation End Products; D011971:Receptors, Immunologic; D064568:S100 Calcium Binding Protein beta Subunit; D009418:S100 Proteins; C579160:S100B protein, human; C579159:S100b protein, mouse; C579158:S100b protein, rat; D048052:Mitogen-Activated Protein Kinase 3