title: Lafutidine, a novel histamine H2-receptor antagonist, increases serum calcitonin gene-related peptide in rats after water immersion-restraint stress.
abstract: Lafutidine is a novel histamine H(2)-receptor antagonist with a potent and long-lasting anti-acid secretory effect that has also been found to have a potent gastroprotective effect. We investigated the effect of lafutidine on gastric mucosal injury induced in rats with the use of water-immersion restraint stress (WRS) by examining serum calcitonin gene-related peptide (CGRP) concentrations, which we measured with the use of an enzyme immunometric assay. WRS-induced mucosal erosive injury in the stomach was reduced significantly by both lafutidine and famotidine pretreatment (from 7.79 +/- 2.02 mm(2) to 3.09 +/- 0.74 mm(2) and 4.05 +/- 1.18 mm(2), respectively). A single administration of lafutidine or famotidine did not change the serum CGRP concentration from the control value when these drugs were administered without WRS. Lafutidine pretreatment before WRS caused a significant increase in serum CGRP concentration compared with famotidine (lafutidine, 86.64 +/- 9.52 pg/mL; famotidine, 47.55 +/- 4.35 pg/mL; control, 58.43 +/- 6.07 pg/mL). Our results suggest that lafutidine augments CGRP release from the rat stomach when administered before the induction of WRS.
authors.affiliation: Department of Internal Medicine II, Shimane Medical University, Shimane, Japan. sss@izumo-net.ne.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sato
authors.forename: Kousaku
authors.initials: K
authors.lastname: Kawashima
authors.forename: Mika
authors.initials: M
authors.lastname: Yuki
authors.forename: Hideaki
authors.initials: H
authors.lastname: Kazumori
authors.forename: Mohammad Azharul Karim
authors.initials: MA
authors.lastname: Rumi
authors.forename: Cesar Francisco
authors.initials: CF
authors.lastname: Ortega-Cava
authors.forename: Shunji
authors.initials: S
authors.lastname: Ishihara
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Kinoshita
mesh_terms: D000081:Acetamides / Q000494:pharmacology*; D000818:Animals; D015740:Calcitonin Gene-Related Peptide / Q000097:blood*; D015738:Famotidine / Q000494:pharmacology; D006635:Histamine H2 Antagonists / Q000494:pharmacology*; D007101:Immersion; D008297:Male; D010880:Piperidines / Q000494:pharmacology*; D011725:Pyridines / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012149:Restraint, Physical; D013276:Stomach Ulcer / Q000209:etiology / Q000517:prevention & control; D013312:Stress, Physiological / Q000097:blood* / Q000150:complications; D014867:Water
chemical_list: D000081:Acetamides; D006635:Histamine H2 Antagonists; D010880:Piperidines; D011725:Pyridines; D014867:Water; C076948:lafutidine; D015738:Famotidine; D015740:Calcitonin Gene-Related Peptide