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Table of Contents
Vol. 48, No. 1-4, 1987
Issue release date: 1987
Section title: Research Paper
Psychother Psychosom 1987;48:14–20
(DOI:10.1159/000288027)

Corticotropin-Releasing Factor Acts on the Brain to Reduce Gastric Contractility

Garrick T. · Veiseh A. · Taché Y. · Weiner H.
West Los Angeles VA Medical Center, Department of Psychiatry and Biobehavioral Sciences, and Department of Medicine, University of California, Los Angeles, and Center for Ulcer Research and Education, Los Angeles, Calif, USA

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Article / Publication Details

First-Page Preview
Abstract of Research Paper

Published online: February 17, 2010
Issue release date: 1987

Number of Print Pages: 7
Number of Figures: 0
Number of Tables: 0

ISSN: 0033-3190 (Print)
eISSN: 1423-0348 (Online)

For additional information: http://www.karger.com/PPS

Abstract

Various stressors (cold restraint, electric shock, etc.) applied to rats increase gastric contractility and are associated with gastric erosions. Intracisternal (i.e.) thyrotropin-releasing hormone (TRH) increases contractility, gastric acid secretion and the incidence of erosion formation. Corticotropin-releasing hormone (CRF) is released by stress, and acting centrally produces autonomic and endocrine changes. We have studied the role of i.e. CRF on gastric contractility in anesthetized rats (n = 6). Contractility was measured by extraluminal force transducers sutured to the gastric corpus. Frequency, amplitude of contractions and a motility index were analyzed by computer. Baseline measures, after recovery from surgery were obtained in 24-hour fasted rats. Contractility was stimulated by intravenous carbachol (100 mg/kg/h) or i.e. injection of the TRH analog, RX 77368. Contractility thus induced was inhibited by intravenous atropine (1 mg/kg). CRF (30–1,000 ng i.e.) produced a dose-dependent suppression of RX 77368 (p < 0.05) but had no effect on that induced by intravenous carbachol; saline i.e. had none either. Intravenous CRF was 1/10th as potent in suppressing contractions produced by i.e. RX 77368. Diminution of gastric contractions after i.e. CRF (1 mg) occurred within 5 min of administration, and lasted for at least 60 min. These data show that i.e. CRF injection acts centrally to inhibit gastric contractions stimulated centrally (i.e. by i.e. RX 77368) but not peripherally (i.e. by carbachol), and by inference reduces the risk of erosion formation induced by some stressors.

© 1987 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Research Paper

Published online: February 17, 2010
Issue release date: 1987

Number of Print Pages: 7
Number of Figures: 0
Number of Tables: 0

ISSN: 0033-3190 (Print)
eISSN: 1423-0348 (Online)

For additional information: http://www.karger.com/PPS


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