Dietary effects of Raphanus sativus cv Sango on lipid and oxysterols accumulation in rat brain: A lipidomic study on a non-genetic obesity model.
Chem Phys Lipids
; 207(Pt B): 206-213, 2017 10.
Article
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| MEDLINE
| ID: mdl-28539223
ABSTRACT
The present study aimed to evaluate the impact of Raphanus sativus cv Sango sprout juice (SSJ) administration (75mg/kg b.w. SSJ/day) on the brain lipidomic profile (fatty acid, sterols, cholesterol oxidation) of rats (non-genetic model) subjected to a high-fat (34% crude fat) dietary regimen. The SSJ did not affect the lipid infiltration (7.7-9.3%) and the fatty acid composition of the rat brain, which was mainly composed by unsaturated fatty acids (â¼58%); however, the high-fat diet regimen significantly halved linoleic acid (LA). The high-fat diet also decreased (21.13mg/g) the level of brain cholesterol with respect to the regular diet (4.5% crude fat) (23.83mg/g); however, when the diet was shifted from high-fat to a regular regimen with or without SSJ supplementation, the levels of cholesterol significantly (p <0.05) increased up to 30.46mg/g of brain. The main oxysterols were 24(S)-hydroxycholesterol (24(S)-HC) and ß-epoxycholesterol (ß-EC). The high-fat diet led to the highest cholesterol oxidation (63.1µg/g), increasing 27-hydroxycholesterol (27-HC) infiltration (0.24µg/g rat brain) through the blood-brain barrier (BBB) compared to the regular diet (0.13µg/g rat brain). On the other hand, when the diet was switched from high-fat to a regular regimen with SSJ supplementation, a significant reduction of 27-HC in the rat brain was found. Although 24-HC did not significantly change (p=0.054), an increasing trend was observed when high-fat diet was supplied. The principal component analysis (PCA) revealed that SSJ was more active in counteracting cholesterol oxidation when supplied with the high-fat diet, due to inverse correlation with 24(S)-HC and 27-HC; however, further studies are needed to better understand which is the relationship between LA and cholesterol homeostasis in rat brain.
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Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Encéfalo
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Raphanus
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Modelos Animales de Enfermedad
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Dieta Alta en Grasa
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Oxiesteroles
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Lípidos
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Obesidad
Límite:
Animals
Idioma:
En
Revista:
Chem Phys Lipids
Año:
2017
Tipo del documento:
Article
País de afiliación:
Italia