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| Content Provider | Taylor & Francis Online |
|---|---|
| Author | Li, Ting Sun, Yanfei Yang, Xingbin Lu, Xinshan |
| Abstract | BackgroundInsulin resistance, which is associated with an increased risk of cardiovascular morbidity and mortality, has become a leading nutrition problem. Inorganic nitrate enriched in spinach has been demonstrated to reverse the pathological features of insulin resistance and endothelial dysfunction. However, the effects of a direct intake of nitrate-enriched spinach on insulin resistance and endothelial dysfunction have not been studied.ObjectiveTo investigate the effects of spinach nitrate on insulin resistance, lipid metabolism, endothelial function, and inflammation in mice fed with a high-fat and high-fructose diet.DesignA diet intervention of spinach with or without nitrate was performed in mice. A high-fat and high-fructose diet was used to cause insulin resistance, endothelial dysfunction, and inflammation in mice. The impacts of spinach nitrate on lipid profile, insulin resistance, markers of endothelial function, and inflammation were determined in mice.ResultsSpinach nitrate improved the vascular endothelial function of the mice with high-fat and high-fructose consumption, as evidenced by the elevated plasma nitrite level, increased serum nitric oxide (NO) level and decreased serum ET-1 level after spinach nitrate intervention. Spinach nitrate also reduced serum triglycerides, total cholesterol, and low-density lipoprotein-cholesterol levels and elevated serum high-density lipoprotein-cholesterol levels in the mice fed with a high-fat and high-fructose diet. Mice receiving spinach with 60 mg/kg of nitrate (1.02±0.34) showed a significantly low homeostasis model assessment-insulin resistance index as compared with the model mice (2.05±0.58), which is indicating that spinach nitrate could effectively improve the insulin resistance. In addition, spinach nitrate remarkably decreased the elevated serum C-reactive protein, tumor necrosis factor α, and interleukin-6 levels induced by a high-fat and high-fructose diet.ConclusionsThe intake of spinach nitrate can augment NO status, improve lipid homeostasis, relieve inflammation, and enhance endothelial function, suggesting that spinach is promising dietary supplements for insulin resistance prevention. |
| File Format | PDF HTM / HTML |
| ISSN | 16546628 1654661X |
| DOI | 10.3402/fnr.v60.32010 |
| Journal | Food & Nutrition Research |
| Volume Number | 60 |
| Issue Number | 1 |
| Language | English |
| Publisher | Taylor & Francis |
| Publisher Date | 2016-09-09 |
| Access Restriction | Open |
| Subject Keyword | Spinach Nitrate Dyslipidemia Endothelial function Inflammation NO Responsible Editor: Per Ole Iversen, University of Oslo, Norway. |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nutrition and Dietetics Public Health, Environmental and Occupational Health Food Science |
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