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Salt overload in fructose-fed insulin-resistant rats decreases paraoxonase-1 activity.
- Source :
-
Nutrition & metabolism [Nutr Metab (Lond)] 2012 Jun 27; Vol. 9 (1), pp. 63. Date of Electronic Publication: 2012 Jun 27. - Publication Year :
- 2012
-
Abstract
- Paraoxonase 1 (PON1) is a HDL-associated esterase/lactonase and its activity is inversely related to the risk of cardiovascular diseases. The aim of the present study was to evaluate the effect of a high-salt diet on serum PON1 activity in fructose-fed insulin-resistant rats. Adult male Fischer rats were initially divided into two groups. Control (CON), which received a normal salt diet and drinking water throughout the study; high fructose (HF), which received a normal salt diet and 20% fructose supplemented drinking water. After 10 weeks, half of the animals from HF group were randomly switched to a high-salt diet and 20% fructose supplemented drinking water (HFS) for more 10 weeks. Serum PON1 activity was determined by synthetic substrate phenyl acetate. HFS rats showed markedly decreased PON1 activity (HFS rats, 44.3 ± 14.4 g/dL versus CON rats, 64.4 ± 13.3 g/dL, P < 0.05) as compared to controls. In parallel, the level of oxidative stress, as indicated by thiobarbituric acid reactive substances (TBARS), was increased in HFS rats by 1.2-fold in the liver in relation to controls and was negatively correlated with PON activity. Differential leukocyte counts in blood showed a significant change in lymphocytes and monocytes profile. In conclusion, these results show that PON1 activity is decreased in fructose-fed insulin-resistant rats on a high-salt diet, which may be associated with increased oxidative stress, leading to inflammation.
Details
- Language :
- English
- ISSN :
- 1743-7075
- Volume :
- 9
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Nutrition & metabolism
- Publication Type :
- Academic Journal
- Accession number :
- 22738670
- Full Text :
- https://doi.org/10.1186/1743-7075-9-63