Related Experiment Videos
Colonic carcinogenesis in vagotomyzed rats
A M Bayón Lara1, I Landa García, J Alcalde Escribano
1Experimental Investigation Center, Hospital 12 de Octubre, Madrid, Spain.
Revista Espanola De Enfermedades Digestivas
|January 5, 2002
Summary
Truncal vagotomy did not increase colorectal cancer (CRC) incidence in rats treated with DMH. This study investigated the link between vagotomy, hypergastrinemia, and CRC development in a rat model.
Area of Science:
- Gastroenterology
- Oncology
- Surgical Research
Background:
- Peptic ulcer disease treatment with truncal vagotomy is linked to increased colorectal cancer (CRC) incidence.
- Hypergastrinemia, a consequence of reduced gastric acid output post-vagotomy, is a suspected CRC risk factor.
Purpose of the Study:
- To evaluate if truncal vagotomy influences CRC incidence in the short (7 days) and long term (120 days).
- To assess the role of vagotomy in a chemical carcinogenesis model.
Main Methods:
- 86 Wistar rats were used, divided into control and vagotomized groups.
- 1,2-dimethylhydrazine dihydrochloride (DMH) was administered at 5 and 20 mg/kg for tumor induction.
- Truncal vagotomy with pyloroplasty and Heller myotomy was performed before DMH administration in experimental groups.
Main Results:
- Low-dose DMH: Vagotomy groups showed 0% cancer incidence, similar to controls.
- High-dose DMH: Vagotomized rats showed varying cancer incidence (0% to 42.8%) compared to non-vagotomized controls (80%).
- Mortality rates varied across groups, with higher rates in vagotomized rats receiving high-dose DMH.
Conclusions:
- Truncal vagotomy did not elevate the incidence of DMH-induced colorectal cancer in rats.
- The study suggests vagotomy is not a significant risk factor for CRC development in this model.