Abstract Title:

Beetroot and Sodium Nitrate Ameliorate Cardiometabolic Changes in Diet-Induced Obese Hypertensive Rats.

Abstract Source:

Mol Nutr Food Res. 2017 12 ;61(12). Epub 2017 Nov 14. PMID: 28952199

Abstract Author(s):

Maharshi Bhaswant, Lindsay Brown, Andrew J McAinch, Michael L Mathai

Article Affiliation:

Maharshi Bhaswant


SCOPE: Dietary intake of beetroot by humans reduces blood pressure but whether this is caused by nitrate or betanin is not well-defined; neither are effects on other signs of metabolic syndrome.

METHODS AND RESULTS: Rats fed a high-carbohydrate, high-fat diet (H) for 16 weeks developed abdominal obesity, hypertension, altered cardiovascular and liver structure and function, and impaired glucose tolerance compared to rats fed a corn starch diet (C). H rats treated with∼16 mg/kg/day of nitrate either from beetroot juice (H+B) or sodium nitrate (H+N) for the last 8 weeks reduced systolic blood pressure by ∼25 mmHg, improved cardiac structure and function, plasma lipid profile and plasma markers of liver function, reduced inflammatory cell infiltration in heartand liver and decreased left ventricular fibrosis. In the left ventricle, H rats increased mRNA expression of connective tissue growth factor (CTGF), monocyte chemoattractant protein 1 (MCP-1), matrix metalloproteinase-2 (MMP-2), and adenosine monophosphate-activated protein kinase-alpha (AMPK-α) and decreased mRNA expression of peroxisome proliferator-activated receptor-alpha (PPAR-α); both beetroot and sodium nitrate diet-fed rats decreased CTGF threefold, MCP-1, and MMP-2 twofold, and doubled PPAR-α mRNA expression in left ventricular tissue.

CONCLUSION: The similar functional and molecular responses to beetroot and sodium nitrate indicate that the nitrate content of beetroot reduced inflammation and improved cardiovascular, liver, and metabolic function in rats with metabolic syndrome, rather than betanin.

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