Research Article

Oleic Acid Protects Against Oxidative Stress Exacerbated by Cytarabine and Doxorubicin in Rat Brain

Author(s):

David Calderón Guzmán, Norma Osnaya Brizuela, Maribel Ortíz Herrera, Hugo Juárez Olguín, Ernestina Hernández García, Armando Valenzuela Peraza and Gerardo Barragán Mejía   Pages 1491 - 1495 ( 5 )

Abstract:

Aim: The objective of this study was to analyze the effect of doxorubicin and cytarabine on biogenic amines and oxidative biomarkers in the brain of rats treated with oleic acid. </p><p> Methods: Thirty-six Wistar rats distributed in 6 groups, were treated as follows: group 1 (control), NaCl 0.9%; group 2 doxorubicin (1mg/kg); group 3 cytarabine (70mg /kg); group 4 oleic acid (1500μl/kg); group 5 doxorubicin + oleic acid; group 6 cytarabine + oleic acid. All compounds were administered intraperitoneally for 5 days. The Rats were sacrificed after receiving the last administration and their brains were dissected in cortex, hemispheres, and cerebellum/medulla oblongata. Blood samples were obtained on sacrifice to assess the levels of glucose and triglycerides. In each brain region, lipoperoxidation (TBARS), H₂O₂, Na⁺, K⁺ ATPase, glutathione (GSH), serotonin metabolites (5-HIAA) and dopamine were measured using validated methods. </p><p> Results: Cytarabine decreased the levels of dopamine, TBARS, GSH, H2O2 and ATPase in all regions. Doxorubicin combined with oleic acid increased the levels of GSH in cortex, and decreased ATPase in cerebellum/medulla oblongata. </p><p> Conclusion: These results suggest that the reduction of dopamine and oxidant effect during cytarabine treatment could result in brain injury but could be prevented by oleic acid supplementation.

Keywords:

Brain, cytarabine, doxorubicin, oxidative damage, unsaturated fatty acid.

Affiliation:

, , , Laboratory of Pharmacology, National Institute of Pediatrics, Av Imán #1, 3er piso, Col Cuicuilco, CP 04530, Mexico City, Mexico.

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