New method of obtaining cinchophen ulcer in dogs

Area of Science:

• Neuroendocrinology
• Gastroenterology
• Pharmacology

Background:

• Peptic ulcers are a significant health concern.
• The role of central nervous system in ulcerogenesis is not fully understood.
• Corticosteroids are implicated in stress-related gastric damage.

Purpose of the Study:

• To investigate the central effects of cinchophen on the hypothalamic-pituitary-adrenal (HPA) axis and gastric mucosal integrity.
• To explore a novel central neurohumoral mechanism for peptic ulcer induction.
• To compare the efficacy of intraventricular versus intravenous administration of cinchophen for ulcer production.

Main Methods:

• Cinchophen was administered intraventricularly and intravenously in dogs.
• Adrenocorticotropic hormone (ACTH) release was assessed by measuring plasma 11-hydroxycorticosteroid (11-OHCS) concentrations.
• Gastric erosions and ulcers were evaluated macroscopically.
• Bilateral truncal vagotomy was performed in some animals.

Main Results:

• Intraventricular cinchophen induced ACTH release and increased plasma 11-OHCS at significantly lower doses than intravenous administration.
• Repeated intraventricular cinchophen injections produced gastric erosions and ulcers more effectively than intravenous injections.
• Cinchophen-induced ulcerations were associated with elevated plasma corticosteroids.
• Bilateral truncal vagotomy did not prevent ulcer formation.

Conclusions:

• Central administration of cinchophen effectively stimulates the HPA axis and induces peptic ulcers in dogs.
• A central neurohumoral pathway, potentially involving the hypothalamus, plays a role in cinchophen-induced gastric damage.
• This study presents a new experimental model for inducing peptic ulcers via central mechanisms.