Galanin inhibits adenylate cyclase of rat brain membranes.
The ubiquitous neuropeptide, galanin, strongly inhibits adenylate cyclase in rat brain membranes. While basal enzyme activity was not altered, galanin from 10(-11) M to 5 x 10(-7) M decreased forskolin- and VIP-stimulated adenylate cyclase with a half-maximal effect being elicited by 0.7 nM neuropeptide and a maximal 80% inhibition of the enzyme activity. The galanin fragments (2-29) and (1-15) dose-dependently inhibited the forskolin-stimulated adenylate cyclase, while the fragments (3-29) and (10-29) were found inactive. These results indicate that the regulatory action of galanin in the central nervous system involves the coupling of galanin receptors to the inhibition of the adenylate cyclase system.
Chen
Y
Y
INSERM U 239, Paris, France.
Laburthe
M
M
Amiranoff
B
B
D000067956:Adenylyl Cyclase Inhibitors; D000262:Adenylyl Cyclases / Q000187:drug effects; D000818:Animals; D001921:Brain / Q000187:drug effects / Q000201:enzymology*; D002462:Cell Membrane / Q000187:drug effects / Q000201:enzymology; D005576:Colforsin / Q000494:pharmacology; D019004:Galanin; D008297:Male; D009479:Neuropeptides / Q000494:pharmacology*; D010455:Peptides / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D014660:Vasoactive Intestinal Peptide / Q000037:antagonists & inhibitors / Q000494:pharmacology
D000067956:Adenylyl Cyclase Inhibitors; D009479:Neuropeptides; D010455:Peptides; D005576:Colforsin; D014660:Vasoactive Intestinal Peptide; D019004:Galanin; D000262:Adenylyl Cyclases