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Megaesophagus in rats
L H Febrônio1, S Britto-Garcia, J S de Oliveira
1Department of Morphology, Faculty of Medicine of Ribeirão Preto, SP, Brazil.
Research in Experimental Medicine. Zeitschrift Fur Die Gesamte Experimentelle Medizin Einschliesslich Experimenteller Chirurgie
|January 1, 1997
Summary
Myenteric denervation of the esophagus using benzalkonium chloride (BAC) caused megaesophagus, muscle hypertrophy, and increased epithelial cell proliferation in a rat model. These findings suggest neurotransmitter imbalance may drive these esophageal changes.
Area of Science:
- Gastroenterology
- Esophageal Physiology
- Cell Biology
Background:
- The myenteric plexus regulates esophageal motility and function.
- Disruptions in esophageal innervation can lead to motility disorders like achalasia.
- Benzalkonium chloride (BAC) is a chemical agent that can induce nerve damage.
Purpose of the Study:
- To investigate the effects of myenteric denervation on the esophagus.
- To determine if BAC-induced denervation causes achalasia-like changes.
- To examine alterations in esophageal muscle propria and epithelial cell proliferation.
Main Methods:
- Myenteric denervation of the abdominal esophagus was performed using benzalkonium chloride (BAC) in a rodent model.
- Esophageal morphometric and histological analyses were conducted 3 months post-treatment.
- Epithelial cell proliferation was assessed using specific markers.
Main Results:
- BAC application resulted in significant megaesophagus.
- Esophageal denervation led to marked muscle hypertrophy.
- A notable increase in epithelial cell proliferation was observed.
Conclusions:
- Myenteric denervation of the esophagus can induce achalasia-like pathology.
- BAC-induced denervation causes structural and proliferative changes in the esophagus.
- Neurotransmitter imbalances are implicated in the morphokinetic alterations observed.