| Sumario: | This article has been updated due to an inadvertent error and an erratum will be published in the forthcoming issue 81 (4) 2024.
The doi http://dx.doi.org/10.31053/1853.0605.v80.n4.40343 does not correspond to this article.
Correct DOI: http://dx.doi.org/10.31053/1853.0605.v80.n4.40930
OBJECTIVE: Cyclophosphamide (Cf) produces oxidative damage in rat submandibular gland (GSM). In the present work we evaluated the antioxidant protective effect of melatonin (MLT) in GSM of rats treated with Cf.
METHODS: 40 adult male Wistar rats were divided into 5 groups (G): G1: control; G2: Control+Ethanol: treated with 1% ethanol for 10 consecutive days. On days 11 and 12 they received a dose of saline; G3: Cf: treated with 1% ethanol for 12 days, days 11 and 12 they received an intraperitoneal (i.p.) dose of Cf 50 mg/Kg/kg of saline. ) of Cf 50 mg/kg bw; G4: Cf + MLT: MLT (5 mg/kg bw, intraperitoneal, dissolved in 1% ethanol) was administered daily, days 11 and 12 received Cf same as G3; G5: MLT: treated 12 consecutive days with MLT (same dose as G4). Animals were anaesthetised, both GSM were removed and sacrificed, after 24 h fasting. Uric acid (UA), lipid peroxides (LPs) and aqueous peroxides (APs) and superoxide dismutase (SOD) activity were measured in GSM homogenate. Statistical analysis: ANOVA and Bonferroni test, considering significant p<0.05.
RESULTS: Cf treatment decreased AU concentration and SOD activity (AU, mg/mg prot., G1: 2.50±0.68; G2: 2.18±0.13; G3: 0.54±0.09* G4: 1.95±0.24#, G5: 2.64±0.47, *p<0.01 G3 vs G1, G2, G4; #p<0.01 G4 vs G3 and G5; SOD, U/mg prot, G1: 4.57±0.95, G2: 4.79±0.94, G3: 2.18±0.53*, G4: 5.13±1.10, G5: 5.09±0.39, *p< 0.01 G3 vs G1, G2, G4 and G5). MLT treatment prevented these effects. In addition, Cf increased PL and PA formation.
CONCLUSION: MLT improved the redox status in GSM of Cf-treated rats. MLT could prevent oxidative processes in GSM produced by Cf.
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