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Franco‐Ávila, Talia; Moreno‐González, Rocío; Juan, M. Emília; Planas, Joana M.
Journal of the science of food and agriculture, 15 January 2023, Letnik: 103, Številka: 1Journal Article
BACKGROUND Table olives are a food with a high content of bioactive compounds with cardioprotective properties, such as oleic acid, polyphenols, and pentacyclic triterpenes. Here, we investigate the effect of the intake of table olives on blood pressure (BP) and body weight in spontaneously hypertensive rats (SHR) and their normotensive controls, Wistar Kyoto (WKY) rats. ‘Arbequina’ table olives (3.85 g kg−1) were administered by gavage to SHR and WKY rats in short‐term (1 day) and long‐term (7 weeks) experiments. BP was measured by the tail‐cuff method, and polyphenols and triterpenes were determined in olives and plasma by liquid chromatography–mass spectrometry. RESULTS Administration of ‘Arbequina’ olives to WKY rats did not exert any change in BP in any of the experiments. However, in SHR, the single dose induced a transient reduction in BP of approximately 15 mmHg, from the second to the tenth hour after the administration. In the long‐term assay, a similar decrease was established in the second week and was maintained throughout the experiment. Moreover, the daily administration of olives to rats did not affect their body weight when compared with controls in either the WKY rats or SHR. The determination of polyphenols and triterpenes in plasma indicated that, at the end of the experiment, only maslinic acid, oleanolic acid, hydroxytyrosol, and luteolin were found, all of them being compounds with already described capacity to decrease BP. CONCLUSION The results suggest that the daily intake of table olives could decrease BP in hypertension without affecting body weight, indicating that table olives could contribute to improving cardiovascular health. © 2022 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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