Rol antioxidante de la l-carnitina en un modelo experimental de estrés oxidativo inducido por consumo elevado de fructosa

Translated title of the contribution: Antioxidant role of l-carnitine in an experimental model of oxidative stress induced by increased fructose consumption

Marilin Maguiña-Alfaro, Silvia Suárez-Cunza, Luis Salcedo-Valdez, María Soberón-Lozano, Kelly Carbonel-Villanueva, Rosa Carrera-Palao

Research output: Contribution to journalArticlepeer-review

Abstract

Objectives: To evaluate the role of L-carnitine (LC) on fructose-induced oxidative stress in Holtzman rats. Materials and methods: An experimental study was carried out during 56 days, in patients assigned to 4 groups: Control, control+LC, fructose and fructose+LC. Patients in the fructose group received treatment during 56 days, and those in the LC groups were treated during the last 28 days. Fructose was given on demand and LC was administered orally at a dose of 500 g/kg/24 h. Lipid peroxidation (MDA), superoxide dismutase activity, free LC and mitochondrial and post-mitochondrial proteins were measured in liver tissue. Glycemia, insulin and the homeostasis model assessment of insulin resistance (HOMA-IR) were measured in blood plasma. We measured insulin concentration and studied the histology of pancreatic tissue. Results: LC treatment showed a decrease (p < 0.05) of MDA when compared to the control group (21.73 ± 5.36 nmol/g tissue vs. 64.46 ± 7.87 nmol/g tissue). Mitochondrial and post-mitochondrial proteins increased (p < 0.05) in comparison to the control group; pancreatic insulin also increased when compared to the control (341.8 ± 42.3 μUI/ml vs. 70.1 ± 9.6 μUI/ml, p<0.05). The role of LC against fructose-induced oxidative stress did not show any decrease of MDA, but decreased (p < 0.05) SOD Cu/Zn activity (9.39 ± 1.5 USOD/mg protein vs. 13.52 ± 1.5 USOD/mg protein). We observed that LC improves HOMA-IR in blood plasma. Histological analysis of the pancreas showed that the presence of LC increased the number and size of the islets of Langerhans. Conclusions: LC favors changes in the oxidative metabolism and it also contributes to glycemic homeostasis when fructose is consumed.

Translated title of the contributionAntioxidant role of l-carnitine in an experimental model of oxidative stress induced by increased fructose consumption
Original languageSpanish
Pages (from-to)662-671
Number of pages10
JournalRevista Peruana de Medicina de Experimental y Salud Publica
Volume37
Issue number4
DOIs
StatePublished - 1 Oct 2020

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