Biologia da mucosa gástrica e comportamento de ingesta de ratos Wistar, submetidos à administração oral de etoricoxib

Abstract

Non steroidal anti-inflammatory are drugs used to treat and control many diseases, on all mammary species. Many studies have been developed on animals and humans to observe the effects of this group of drugs on gastrointestinal tract mucosa. Gastric and duodenal lesions are among the side effects caused by non selective cyclooxygenase suppression. Etoricoxib is a new non steroidal anti-inflammatory drug, highly selective cyclooxygenase 2 inhibitor, that preserves gastric and duodenal mucosa protective function. The objective of this work was to study the biological effect of Etoricoxib oral administration, on rats gastric and duodenal mucosa, food and water ingestion and body weight changes. Forty five Wistar rats were divided on 3 groups. The first one (control group) received 0.9% Sodium chloride solution, The second and third one received 0.5 and 5.0 mg/day Etoricoxib, respectively. During 10 days period, food, water and body weight were measured. All animals were anesthetized and killed on the 11th day. Stomach and duodenum were macro and microscopically evaluated. We concluded that there was no significant difference on body weight changes, nor water or food ingestion on any studied groups. Enantema, erosions or ulcers were not observed macro or microscopically. Soft and diffuse eosinophilic infiltrate was observed on both treated groups. Soft submucosa linphoplasmocitary infiltrate was observed on the higher dose Etoricoxib group (5.0 mg/day).