Involvement of protein kinase C in reduction of aggregated protein and phosphorylation of CREB in glomeruli

Exp Anim. 2012;61(2):119-24. doi: 10.1538/expanim.61.119.

Abstract

We previously demonstrated the cAMP-PKA pathway to be associated with the reduction in aggregated proteins such as immune complex in glomeruli. The aim of this study was to clarify whether PKC is involved in the reduction of aggregated protein and phosphorylation of CREB in aggregated protein-loaded glomeruli. Mice were injected with aggregated bovine serum albumin (a-BSA), and glomeruli were isolated. The a-BSA-injected mice produced more cyclic AMP and had more phosphorylated serine and phosphorylated CREB in their glomeruli than the controls. The expression of phospho-CREB increased with the accumulation of a-BSA. KT5720 and H7 suppressed the increase in phosphorylated CREB in a-BSA-loaded glomeruli and the decrease in accumulated a-BSA in the glomeruli. These findings suggest that PKC is associated with the reduction of aggregated protein and phosphorylation of CREB in aggregated protein-loaded glomeruli.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • 1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine / pharmacology
  • Animals
  • CREB-Binding Protein / metabolism*
  • Carbazoles / pharmacology
  • Cattle
  • Cyclic AMP / metabolism
  • Enzyme Inhibitors / pharmacology
  • Kidney Glomerulus / drug effects
  • Kidney Glomerulus / metabolism*
  • Male
  • Mice
  • Mice, Inbred ICR
  • Oxidative Phosphorylation
  • Protein Kinase C / antagonists & inhibitors
  • Protein Kinase C / metabolism*
  • Pyrroles / pharmacology
  • Serum Albumin, Bovine / metabolism
  • Serum Albumin, Bovine / pharmacology

Substances

  • Carbazoles
  • Enzyme Inhibitors
  • Pyrroles
  • Serum Albumin, Bovine
  • KT 5720
  • 1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine
  • Cyclic AMP
  • CREB-Binding Protein
  • Crebbp protein, mouse
  • Protein Kinase C