Olive leaf extract attenuates cardiac, hepatic, and metabolic changes in high carbohydrate-, high fat-fed rats
Article
Article Title | Olive leaf extract attenuates cardiac, hepatic, and metabolic changes in high carbohydrate-, high fat-fed rats |
---|---|
ERA Journal ID | 13658 |
Article Category | Article |
Authors | Poudyal, Hemant (Author), Campbell, Fiona (Author) and Brown, Lindsay (Author) |
Journal Title | The Journal of Nutrition |
Journal Citation | 140 (5), pp. 946-953 |
Number of Pages | 8 |
Year | 2010 |
Place of Publication | Bethesda, MD. United States |
ISSN | 0022-3166 |
1541-6100 | |
Digital Object Identifier (DOI) | https://doi.org/10.3945/jn.109.117812 |
Web Address (URL) | http://jn.nutrition.org/content/140/5/946.full.pdf+html |
Abstract | Olive oil, an important component of the Mediterranean diet, produces cardioprotective effects, probably due to both oleic acid and the polyphenols such as oleuropein and hydroxytyrosol. Our aim in this study was to assess whether a polyphenol-enriched extract from the leaves of Olea europaea L. with oleuropein as the major component attenuated the cardiovascular, hepatic, and metabolic signs of a high-carbohydrate, high-fat (HCHF) diet (carbohydrate, 52%; fat, 24%, 25% fructose in drinking water) in rats. Male Wistar rats were fed either a cornstarch diet (CS) or a HCHF diet for a total of 16 wk. Diets of the treatment groups [CS+olive leaf extract (OLE) and HCHF+OLE] were supplemented with 3% OLE after 8 wk of being fed their respective CS or HCHF diets for a further 8 wk. After 16 wk, HCHF rats developed signs of metabolic syndrome, including elevated abdominal and hepatic fat deposition, collagen deposition in heart and liver, cardiac stiffness, and oxidative stress markers (plasma malondialdehyde and uric acid concentrations), with diminished aortic ring reactivity, abnormal plasma lipid profile, impaired glucose tolerance, and hypertension. Compared with HCHF rats, those in the HCHF+OLE group had improved or normalized cardiovascular, hepatic, and metabolic signs with the exception of elevated blood pressure. These results strongly suggest that an OLE containing polyphenols such as oleuropein and hydroxytyrosol reverses the chronic inflammation and oxidative stress that induces the cardiovascular, hepatic, and metabolic symptoms in this rat model of diet-induced obesity and diabetes without changing blood pressure. |
Keywords | olive oil; cardiovascular system; HCHF diet |
ANZSRC Field of Research 2020 | 320507. Metabolic medicine |
321099. Nutrition and dietetics not elsewhere classified | |
321401. Basic pharmacology | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
https://research.usq.edu.au/item/9zv6q/olive-leaf-extract-attenuates-cardiac-hepatic-and-metabolic-changes-in-high-carbohydrate-high-fat-fed-rats
2211
total views10
total downloads1
views this month0
downloads this month