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Effects of zinc-L-carnosine and vitamin E on aspirin-induced gastroduodenal injury in dogs.

Author(s): Baan M, Sherding RG, Johnson SE.

Affiliation(s): Department of Medical Sciences, School of Veterinary Medicine, The University of Wisconsin-Madison, Madison, WI 53706, USA. miekebaan@hotmail.com

Publication date & source: 2011, J Vet Intern Med. , 25(1):39-46

BACKGROUND: Nonsteroidal anti-inflammatory drugs frequently cause gastrointestinal (GI) injury. Zinc-L-carnosine has antioxidant, anti-inflammatory, mucosal protective, and healing properties in rodent models and in some human studies of GI injury. HYPOTHESIS: The combination of zinc-L-carnosine and vitamin E attenuates aspirin-induced gastroduodenal mucosal injury. ANIMALS: Eighteen healthy random-source Foxhound dogs. METHODS: In this randomized, double-blinded, placebo-controlled study dogs were treated with placebo (n = 6; 0X group), 30 mg/30 IU (n = 6; 1X group), or 60 mg/60 IU (n = 6; 2X group) zinc-L-carnosine/vitamin E orally every 12 hours for 35 days. Between Day 7 and 35, GI mucosal lesions were induced with aspirin (25 mg/kg p.o. q8h). Mucosal injury lesions (hemorrhage, erosion, and ulcer) were assessed by gastroduodenoscopy on Days 14, 21, and 35 with a 12-point scoring scale. RESULTS: At baseline (Day -1) gastroscopy scores were not significantly different between groups (mean ± SD: 0X, 4.4 ± 0.8; group 1X, 4.4 ± 0.6; group 2X, 4.2 ± 0.3; P= .55). Gastroscopy scores increased significantly in all groups between Day -1 and Days 14, 21, and 35 (P < .0001). On Day 35, gastroscopy scores were 29.2 ± 5.2 (0X), 27.3 ± 3.7 (1X), and 28.6 ± 3.3 (2X). Mean gastroscopy scores were not significantly different among treatment groups on any of the days (P = .61). CONCLUSIONS AND CLINICAL IMPORTANCE: Administration of the combination of zinc-L-carnosine and vitamin E at 1X or 2X dosing did not attenuate aspirin-induced gastroduodenal mucosal injury.

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