Dietary Squalene Induces Cytochromes Cyp2b10 and Cyp2c55 Independently of Sex, Dose and Diet in Several Mouse Models.

SCOPE To investigate the effects of squalene, the main hydrocarbon present in extra virgin olive oil, on liver transcriptome in different animal models and to test the influence of sex on this action and its relationship with hepatic lipids. METHODS AND RESULTS To this purpose, male C57BL/6J Apoe-deficient mice were fed a purified Western diet with or without squalene during 11 weeks and hepatic squalene content was assessed, so were hepatic lipids and lipid droplets. Hepatic transcriptomic changes were studied and confirmed by RT-qPCR. Dietary characteristics and influence of squalene doses were tested in Apoe-deficient on purified chow diets with or without squalene. These diets were also given to Apoa1 and wild-type mice on C57BL/6J background and to C57BL/6J xOla129 Apoe-deficient mice. Squalene supplementation increased its hepatic content without differences among sexes and hormonal status. The Cyp2b10 and Cyp2c55 gene expressions were significantly up-regulated by the squalene intake in all models, with independence of sex, sexual hormones, dietary fat content, genetic background and dose, and in Apoe-deficient mice consuming extra-virgin olive oil. CONCLUSION Hepatic squalene increases the expression of these cytochromes and their changes in virgin olive oil diets may be due to their squalene content. This article is protected by copyright. All rights reserved.

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