Vitamin C and vitamin E in prevention of Nonalcoholic Fatty Liver Disease (NAFLD) in choline deficient diet fed rats.
OBJECTIVE
Oxidative stress has been implicated in the pathogenesis of Nonalcoholic Fatty Liver Disease (NAFLD). Vitamin C and vitamin E are known to react with reactive oxygen species (ROS) blocking the propagation of radical reactions in a wide range of oxidative stress situations. The potential therapeutic efficacy of antioxidants in NAFLD is unknown. The aim of this study was to evaluate the role of antioxidant drugs (vitamin C or vitamin E) in its prevention.


METHODS
Fatty liver disease was induced in Wistar rats by choline-deficient diet for four weeks. The rats were randomly assigned to receive vitamin E (n = 6) - (200 mg/day), vitamin C (n = 6) (30 mg/Kg/day) or vehicle orally.


RESULTS
In the vehicle and vitamin E-treated rats, there were moderate macro and microvesicular fatty changes in periportal area without inflammatory infiltrate or fibrosis. Scharlach stain that used for a more precise identification of fatty change was strong positive. With vitamin C, there was marked decrease in histological alterations. Essentially, there was no liver steatosis, only hepatocellular ballooning. Scharlach stain was negative. The lucigenin-enhanced luminescence was reduced with vitamin C (1080 +/- 330 cpm/mg/min x 10(3)) as compared to those Vitamin E and control (2247 +/- 790; 2020 +/- 407 cpm/mg/min x 10(3), respectively) (p < 0.05). Serum levels of aminotransferases were unaltered by vitamin C or vitamin E.


CONCLUSIONS
1) Vitamin C reduced oxidative stress and markedly inhibited the development of experimental liver steatosis induced by choline-deficient diet; 2)Vitamin E neither prevented the development of fatty liver nor reduced the oxidative stress in this model.
Oliveira
Claudia P M S
CP
Department of Gastroenterology, Medical School, University of São Paulo, São Paulo, Brazil. mauclaud@uol.com.br
Gayotto
Luiz Carlos da Costa
LC
Tatai
Caroline
C
Della Nina
Bianca Ishimoto
BI
Lima
Emerson S
ES
Abdalla
Dulcinéia S P
DS
Lopasso
Fabio P
FP
Laurindo
Francisco R M
FR
Carrilho
Flair José
FJ