Effects of the S2-serotonergic receptor antagonist, ketanserin, on cerulein-induced pancreatitis in the rat.
We investigated the effects of ketanserin, a S 2 (5-hydroxytryptamine 2; 5-HT 2)-serotonergic receptor antagonist, on cerulein-induced pancreatitis in the rat. Large pharmacological doses of cerulein induced acute pancreatitis in the rat. Ketanserin reduced the cerulein-induced increase in serum amylase concentration in a dose-dependent manner. Treatment with 10 mg/kg of ketanserin per os markedly improved cerulein-induced pancreatitis and was associated with a significant reduction of the increase in serum amylase concentration. In addition, a very specific serotonin S 2 antagonist, ritanserin which has no antihypertensive effect, also reduced the cerulein-induced increase in the serum amylase concentration. These results suggest that S 2 (5-HT 2) may play a role in pathophysiology of cerulein-induced pancreatitis in the rat.
Oguchi
H
H
Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan.
Terashima
M
M
Koiwai
T
T
Kawa
S
S
Furuta
S
S
Kobayashi
M
M
Homma
T
T
D000208:Acute Disease; D000681:Amylases / Q000097:blood; D000818:Animals; D002108:Ceruletide; D004305:Dose-Response Relationship, Drug; D007650:Ketanserin / Q000494:pharmacology*; D008297:Male; D010195:Pancreatitis / Q000139:chemically induced / Q000188:drug therapy* / Q000503:physiopathology*; D051381:Rats; D011919:Rats, Inbred Strains; D016713:Ritanserin / Q000494:pharmacology; D012701:Serotonin / Q000502:physiology*
D016713:Ritanserin; D012701:Serotonin; D002108:Ceruletide; D007650:Ketanserin; D000681:Amylases