Resumo

PEREZ GUERRA, Yohani et al. Scavenger effect of D-002 on hydroxyl radicals in the gastric mucosa. Rev Cubana Farm [online]. 2012, vol.46, n.1, pp.87-96. ISSN 0034-7515.

Introduction: the etiology of the gastric ulceration is associated to the imbalance between aggressive and defensive factors acting upon the gastric mucosa. D-002, a mixture of 6 higher primary alcohols purified from the beeswax, cause some multiple mechanism-mediated gastroprotective effects and decrease of lipid peroxidation in the gastric mucosa. Objective: to determine whether D-002 can scavenge the in vivo added or in vivo generated hydroxyl radical in rats with indometacin-induced gastric ulcer or not. Methods: For the in vitro experiment, D-002 was added at concentrations 0.9 and 1 000 mg/mL For the in vivo experiment, the rats were randomized into 6 groups: one negative control, and five indometacin-treated groups as follows a positive excipient-treated control, three under D-002 treatment (5, 25 or 100 mg/kg, respectively, p.o.), and another group treated with Omeprazole (20 mg/kg i.p.). These lines of treatment were given 1 hour (excipient and D-002) or 30 min (Omeprazole) prior to inducing the ulcers. In both experiments, aliquots from the gastric mucosa were taken and the damage infringed to 2-deoxiribose by the hydroxyl radical was determined. Results: oral administration of D-002, rather than in vitro addition, significantly protected 2-desoxiribose from the oxidative damage depending on the dosage as compared to the positive control. Conclusions: these results indicate that the ability of the orally administered D-002 (25 and 100 mg/kg) to scavenge the hydroxyl radical endogenously generated on the gastric mucosa by indometacin could contribute to its antioxidant and gastroprotective effects against the damage that the non-steroidal anti-inflammatory drugs carry to the gastric mucosa.

Palavras-chave : D-002; hydroxyl radical; gastric mucosa; gastric ulcer; indometacin-induced ulcers.

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