Cellular distribution and function of soluble guanylyl cyclase in rat kidney and liver.
Soluble guanylyl cyclase (sGC) catalyzes the biosynthesis of cGMP in response to binding of L-arginine-derived nitric oxide (NO). Functionally, the NO-sGC-cGMP signaling pathway in kidney and liver has been associated with regional hemodynamics and the regulation of glomerular parameters. The distribution of the ubiquitous sGC isoform alpha 1 beta 1 sGC was studied with a novel, highly specific antibody against the beta 1 subunit. In parallel, the presence of mRNA encoding both subunits was investigated by using in situ hybridization and reverse transcription-PCR assays. The NO-induced, sGC-dependent accumulation of cGMP in cytosolic extracts of tissues and cells was measured in vitro. Renal glomerular arterioles, including the renin-producing granular cells, mesangium, and descending vasa recta, as well as cortical and medullary interstitial fibroblasts, expressed sGC. Stimulation of isolated mesangial cells, renal fibroblasts, and hepatic Ito cells with a NO donor resulted in markedly increased cytosolic cGMP levels. This assessment of sGC expression and activity in vascular and interstitial cells of kidney and liver may have implications for understanding the role of local cGMP signaling cascades.
Theilig
Franziska
F
Department of Anatomy, Charité, Humboldt University, Berlin, Germany.
Bostanjoglo
Magdalena
M
Department of Anatomy, Charité, Humboldt University, Berlin, Germany.
Pavenstädt
Hermann
H
Department of Nephrology, University of Freiburg, Freiburg, Germany.
Grupp
Clemens
C
Department of Nephrology, University of Göttingen, Göttingen, Germany.
Holland
Gudrun
G
Department of Anatomy, Charité, Humboldt University, Berlin, Germany.
Slosarek
Ilka
I
Department of Anatomy, Charité, Humboldt University, Berlin, Germany.
Gressner
Axel M
AM
Department of Clinical Chemistry, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Germany.
Russwurm
Michael
M
Department of Pharmacology, Ruhr University, Bochum, Germany.
Koesling
Doris
D
Department of Pharmacology, Ruhr University, Bochum, Germany.
Bachmann
Sebastian
S
Department of Anatomy, Charité, Humboldt University, Berlin, Germany.
D000818:Animals; D015153:Blotting, Western; D006162:Guanylate Cyclase / Q000737:chemistry / Q000378:metabolism*; D007668:Kidney / Q000166:cytology / Q000201:enzymology*; D008099:Liver / Q000166:cytology / Q000201:enzymology*; D008297:Male; D009569:Nitric Oxide / Q000494:pharmacology; D051381:Rats; D017207:Rats, Sprague-Dawley; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012995:Solubility; D014018:Tissue Distribution
D009569:Nitric Oxide; D006162:Guanylate Cyclase