Effects of citrus leaf extract on aortic vascular reactivity in hypertensive rats fed repeatedly heated vegetable oil.
Appl Physiol Nutr Metab
; 44(4): 373-380, 2019 04.
Article
em En
| MEDLINE
| ID: mdl-30216735
The prolonged intake of diet containing repeatedly heated vegetable oil can cause hypertension in the long run. In this study, the effects of citrus leaf extract (CLE) supplementation on vascular reactivity, plasma nitrite, and aortic structure in hypertensive rats were investigated by the consumption of repeatedly heated vegetable oil [corrected]. Male Sprague Dawley rats (n = 56) were divided into 7 groups corresponding to the respective diets. For 16 weeks, 1 group was given standard rat chow (control) while other groups were given diets containing 15% w/w of palm oil, fresh palm oil (FPO), palm oil heated 5 times (5HPO), and palm oil heated 10 times (10HPO), with or without the incorporation of 0.15% w/w CLE (FPO+CLE, 5HPO+CLE, or 10HPO+CLE). Plasma nitrite levels were measured before and at 16 weeks of treatment. After 16 weeks, the rats were sacrificed and aortae were harvested for measuring vascular reactivity and for microscopic study. CLE supplementation had significantly reduced the loss of plasma nitrite and attenuated the vasoconstriction response to phenylephrine in the 5HPO group but not in the 10HPO group. However, CLE had no significant effect on the vasorelaxation response to acetylcholine and sodium nitroprusside. The elastic lamellae of tunica media in 5HPO, 10HPO, and 10HPO+CLE groups appeared disorganised and disrupted. Obtained findings suggested that CLE was able to enhance nitric oxide bioavailability that might dampen the vasoconstriction effect of phenylephrine.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Aorta
/
Vasoconstrição
/
Pressão Sanguínea
/
Extratos Vegetais
/
Óleo de Palmeira
/
Citrus
/
Folhas de Planta
/
Culinária
/
Temperatura Alta
/
Hipertensão
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Appl Physiol Nutr Metab
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Malásia