Podocyte-associated molecules in puromycin aminonucleoside nephrosis of the rat

Lab Invest. 2002 Jun;82(6):713-8. doi: 10.1097/01.lab.0000017168.26718.16.

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Actinin / genetics
  • Actinin / metabolism
  • Albuminuria / metabolism
  • Animals
  • Cytoskeletal Proteins / genetics
  • Cytoskeletal Proteins / metabolism
  • DNA Primers / chemistry
  • Disease Models, Animal
  • Dystroglycans
  • Female
  • Immunohistochemistry
  • Integrin beta1 / genetics
  • Integrin beta1 / metabolism
  • Intracellular Signaling Peptides and Proteins
  • Kidney Glomerulus / metabolism*
  • Kidney Glomerulus / pathology
  • Membrane Glycoproteins / genetics
  • Membrane Glycoproteins / metabolism
  • Membrane Proteins / genetics
  • Membrane Proteins / metabolism*
  • Microfilament Proteins*
  • Nephrotic Syndrome / chemically induced
  • Nephrotic Syndrome / metabolism*
  • Nephrotic Syndrome / pathology
  • Proteins / genetics
  • Proteins / metabolism
  • Puromycin Aminonucleoside / toxicity
  • RNA, Messenger / metabolism
  • Rats
  • Rats, Sprague-Dawley
  • Reverse Transcriptase Polymerase Chain Reaction
  • Trans-Activators*
  • beta Catenin

Substances

  • Actn4 protein, rat
  • Ctnnb1 protein, rat
  • Cytoskeletal Proteins
  • DAG1 protein, human
  • DNA Primers
  • Integrin beta1
  • Intracellular Signaling Peptides and Proteins
  • Membrane Glycoproteins
  • Membrane Proteins
  • Microfilament Proteins
  • NPHS2 protein
  • Proteins
  • RNA, Messenger
  • Trans-Activators
  • beta Catenin
  • nephrin
  • Actinin
  • Dystroglycans
  • Puromycin Aminonucleoside