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Chronic oesophagitis in the cat.

N Poorkhalkali1, H G Rich, I Jacobson

  • 1Discovery, AstraZeneca AB Mölndal, Sweden. nadereh.poorkhalkali@astrazeneca.com

Scandinavian Journal of Gastroenterology
|August 28, 2001
PubMed
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This study developed a long-term animal model for gastro-oesophageal reflux disease (GERD) by performing myotomy in cats. The model successfully replicated chronic reflux oesophagitis, aiding future GERD research.

Area of Science:

  • Gastroenterology
  • Animal Models
  • Oesophagitis Research

Background:

  • Limited understanding of gastro-oesophageal reflux disease (GERD) pathophysiology.
  • Need for a chronic animal model to study GERD development.

Purpose of the Study:

  • Establish a long-term (>1 year) animal model for reflux oesophagitis.
  • Facilitate research into the development of chronic GERD.

Main Methods:

  • Surgical myotomy of the gastro-oesophageal junction in eight cats.
  • Sham operation in seven control cats.
  • Regular oesophagoscopy, biopsies for histology, and manometry to measure lower oesophageal sphincter pressure (LESP) over one year.

Main Results:

  • Myotomy significantly decreased LESP.

Related Experiment Videos

  • Oesophagitis observed in myotomized cats starting at 2 months post-surgery.
  • Histological changes included basal cell hyperplasia and cardiac-type metaplasia; control cats showed no significant changes.

    • Conclusions:

    • Myotomy in cats creates a reliable, long-term model of reflux oesophagitis.
    • The induced condition closely resembles chronic GERD observed in human patients.