Journal of Gastroenterology

, 44:1118 | Cite as

Ecabet sodium induces neuronal nitric oxide synthase-derived nitric oxide synthesis and gastric adaptive relaxation in the human stomach

  • Yoshiaki Matsumoto
  • Masanori Ito
  • Masataka Tsuge
  • Taiji Matsuo
  • Shinji Tanaka
  • Ken Haruma
  • Kazuaki Chayama
Original Article—Alimentary Tract

Abstract

Background

Gastric adaptive relaxation (GAR) is a major factor of functional dyspepsia (FD). Nitric oxide (NO) could be the key molecule responsible for GAR. We previously reported that the physiological gastric reservoir ability can be evaluated by measuring the cross-sectional area of the proximal stomach by abdominal ultrasonography (US). Ecabet sodium (ES), a gastro-protective antiulcer agent, has been shown to improve symptoms in FD patients. We examined the effects of ES on GAR in humans and on NO synthesis in vitro.

Methods

GAR was measured by US in 14 subjects, 8 of whom had a pressure sensor inserted into their stomach, after treatment with ES, placebo, or no drugs. NO was measured in SH-SY 5Y cells using a fluorescent indicator. Neuronal, endothelial and inducible NO synthase (nNOS, eNOS and iNOS, respectively) expressions were examined in SH-SY 5Y cells by Western blotting.

Results

Compared to placebo, ES induced significantly greater dilatation of the proximal stomach after the subjects drank 300–400 ml water (P < 0.05). After ES intake, the intragastric pressure did not change significantly, but it tended to be lower (n = 8; P = 0.15). ES increased NO production and nNOS expression, but not iNOS or eNOS expression, in SH-SY 5Y cells in vitro. Pretreatment with non-selective NO synthase (NOS) inhibitor, but not with iNOS-selective inhibitor, reduced NO production by ES.

Conclusion

ES may promote GAR in humans through nNOS-related NO; therefore, it may be useful for patients with FD.

Keywords

Ecabet sodium Functional dyspepsia Gastric adaptive relaxation Nitric oxide Ultrasonography 

Abbreviations

ANOVA

Analysis of variance

CGRP

Calcitonin gene-related peptide

CPSN

Capsaicin-sensitive afferent nerves

DAF-2

Diaminofluorescein-2

ES

Ecabet sodium

FD

Functional dyspepsia

GAR

Gastric adaptive relaxation

NO

Nitric oxide

NOS

Nitric oxide synthase

nNOS

Neuronal nitric oxide synthase

eNOS

Endothelial nitric oxide synthase

iNOS

Inducible nitric oxide synthase

US

Ultrasonography

Notes

Acknowledgments

We thank Professor Masaharu Yoshihara (Health Service Center of Hiroshima University) and Professor Yukihito Higashi (Department of Cardiovascular Physiology and Medicine, Hiroshima University) for their valuable suggestions. This study was carried out at the Analysis Center of Life Science, Hiroshima University.

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Copyright information

© Springer 2009

Authors and Affiliations

  • Yoshiaki Matsumoto
    • 1
  • Masanori Ito
    • 1
  • Masataka Tsuge
    • 1
  • Taiji Matsuo
    • 1
  • Shinji Tanaka
    • 2
  • Ken Haruma
    • 3
  • Kazuaki Chayama
    • 1
  1. 1.Department of Medicine and Molecular Science, Graduate School of Biomedical SciencesHiroshima UniversityHiroshimaJapan
  2. 2.Department of EndoscopyHiroshima University HospitalHiroshimaJapan
  3. 3.Department of GastroenterologyKawasaki Medical SchoolKurashikiJapan

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