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Published on: September 18, 2014

Myenteric denervation reduces the incidence of gastric tumors in rats

Ana Claúdia Polli-Lopes1, Sérgio Zucoloto, Fernando de Queirós Cunha

  • 1Department of Morphology, São José do Rio Preto Medical School, FAMERP, 15090 000, São José do Rio Preto, Brazil.

Cancer Letters
|January 22, 2003
PubMed

Insights

Myenteric denervation, achieved via chemical means, significantly reduced the number and size of gastric tumors in rats. This protective effect was enhanced when combined with pyloroplasty.

Area of Science:

  • Gastroenterology
  • Oncology
  • Neuroscience

Background:

  • Gastric tumors pose a significant health challenge.
  • The role of the enteric nervous system in tumorigenesis is not fully understood.
  • N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) is a known inducer of gastric cancer in experimental models.

Purpose of the Study:

  • To investigate the effect of myenteric denervation on MNNG-induced gastric tumor development.
  • To evaluate the impact of chemical denervation using benzalkonium chloride (BAC) on gastric tumorigenesis.
  • To assess the combined effect of denervation and pyloroplasty on tumor incidence and size.

Main Methods:

  • Chemical denervation of the rat stomach using benzalkonium chloride (BAC).
  • Induction of gastric tumors using N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) in drinking water for 28 weeks.
  • Morphological analysis of stomach tissues from control, denervated, and denervated with pyloroplasty groups.

Main Results:

  • BAC treatment effectively reduced the number of myenteric neurons.
  • Denervation led to an increase in gastric mucosa area.
  • A significant decrease in the number and size of gastric adenocarcinomas was observed in denervated rats.
  • The reduction in tumor burden was more pronounced in rats that underwent both denervation and pyloroplasty.

Conclusions:

  • Myenteric denervation plays a protective role against experimentally induced gastric tumors.
  • Targeting the enteric nervous system may offer a novel therapeutic strategy for gastric cancer prevention.
  • Pyloroplasty can potentiate the anti-tumorigenic effects of myenteric denervation.

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