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Effects of almonds on ameliorating salt‐induced hypertension in Dahl salt‐sensitive rats

一氧化氮 氧化应激 内科学 内分泌学 血压 化学 过氧化氢酶 谷胱甘肽 谷胱甘肽过氧化物酶 抗氧化剂 超氧化物歧化酶 食品科学 生物化学 医学
作者
Li Zeng,Zerong Liu,Luxin Zhou,Meng Chen,Xuewei Zheng,Pengfei Yang,Xinrui Zhao,Zhongmin Tian
出处
期刊:Journal of the Science of Food and Agriculture [Wiley]
卷期号:102 (7): 2710-2722 被引量:1
标识
DOI:10.1002/jsfa.11611
摘要

Excessive dietary salt intake is related to an increased risk of hypertension. Dietary functional foods probably could help to improve salt-induced hypertension. In this study, Dahl salt-sensitive (DSS) rats were used to investigate their metabolic differences from those of salt-resistant SS.13BN rats and determine whether dietary protein-rich almonds could ameliorate salt-induced elevation of blood pressure in DSS rats.After high-salt intake, the systolic blood pressure and mean arterial pressure of the DSS rats increased dramatically. Metabolomics analysis indicated abnormal amino acid metabolism in their kidneys. Their renal nitric oxide (NO) content and nitric oxide synthase activity decreased significantly after high-salt diet. Oxidative stress also occurred in DSS rats. After the DSS rats received almond supplementation, the levels of various amino acids in their kidney increased, and renal arginine and NO contents were upregulated. Their renal hydrogen peroxide and malonaldehyde levels decreased, whereas renal catalase, superoxide dismutase and glutathione peroxidase activities and glutathione levels increased.The renal abnormal amino acid metabolism of DSS rats contributed to the impaired NO production in response to high-salt intake. Together with salt-induced oxidative stress, high-salt diet intake ultimately led to an increase in the blood pressure of DSS rats. Protein-rich almond supplementation might prevent the development of salt-induced hypertension by restoring arginine and NO regeneration and alleviating salt-induced oxidative stress. © 2021 Society of Chemical Industry.

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