title: Podocyte-associated molecules in puromycin aminonucleoside nephrosis of the rat.
abstract: Molecules of central functional significance for the glomerular podocytes are rapidly emerging and have been shown to be distinctly involved in diseases with altered glomerular filtration barrier. Here we used the puromycin aminonucleoside (PA) nephrosis model in the rat to study some key proteins associated with the maintenance of the functional glomerular filtration barrier in vivo. The molecules studied included the filtration slit component nephrin, the hairpin-like membrane protein podocin, the basolateral adhesion molecules beta1 integrin and alpha-dystroglycan, and the cytoskeleton-linking intermediary beta-catenin and the actin-associated alpha-actinin-4. The results showed diminished protein levels of podocin and nephrin in the PA-treated group. beta-catenin showed distinct down-regulation at 3 days of induction, and the control level was reached at 10 days. beta1 integrin was markedly up-regulated during induction. alpha-actinin-4 was not changed at the studied time points. The results show distinct differences in the different domains of podocytes during PA-induced proteinuria.
authors.affiliation: Haartman Institute, Department of Bacteriology and Immunology, University of Helsinki, Finland.
authors.forename: Pauliina
authors.initials: P
authors.lastname: Luimula
authors.forename: Niclas
authors.initials: N
authors.lastname: Sandström
authors.forename: Dmitry
authors.initials: D
authors.lastname: Novikov
authors.forename: Harry
authors.initials: H
authors.lastname: Holthöfer
mesh_terms: D000185:Actinin / Q000235:genetics / Q000378:metabolism; D000419:Albuminuria / Q000378:metabolism; D000818:Animals; D003598:Cytoskeletal Proteins / Q000235:genetics / Q000378:metabolism; D017931:DNA Primers / Q000737:chemistry; D004195:Disease Models, Animal; D049030:Dystroglycans; D005260:Female; D007150:Immunohistochemistry; D019012:Integrin beta1 / Q000235:genetics / Q000378:metabolism; D047908:Intracellular Signaling Peptides and Proteins; D007678:Kidney Glomerulus / Q000378:metabolism* / Q000473:pathology; D008562:Membrane Glycoproteins / Q000235:genetics / Q000378:metabolism; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism*; D008840:Microfilament Proteins; D009404:Nephrotic Syndrome / Q000139:chemically induced / Q000378:metabolism* / Q000473:pathology; D011506:Proteins / Q000235:genetics / Q000378:metabolism; D011692:Puromycin Aminonucleoside / Q000633:toxicity; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015534:Trans-Activators; D051176:beta Catenin
chemical_list: C491751:Actn4 protein, rat; C495268:Ctnnb1 protein, rat; D003598:Cytoskeletal Proteins; C483081:DAG1 protein, human; D017931:DNA Primers; D019012:Integrin beta1; D047908:Intracellular Signaling Peptides and Proteins; D008562:Membrane Glycoproteins; D008565:Membrane Proteins; D008840:Microfilament Proteins; C407223:NPHS2 protein; D011506:Proteins; D012333:RNA, Messenger; D015534:Trans-Activators; D051176:beta Catenin; C113267:nephrin; D000185:Actinin; D049030:Dystroglycans; D011692:Puromycin Aminonucleoside