title: Ezetimibe reduced hepatic steatosis induced by dietary oxysterols in nonhuman primates.
abstract: Oxidized cholesterol (oxysterols) plays an important and multifaceted role in lipid metabolism. Here we examined whether dietary oxysterols accelerate hepatic lipid accumulation and inflammation in nonhuman primates. We also examined the effect of the Niemann-Pick C1-like1 inhibitor, ezetimibe (Ez).Macaca fascicularis(5-year-old males) were fed either regular cholesterol + high-fat diet (control-HFD) or oxysterols + high-fat diet (ox-HFD; with 0.015% of oxysterols cholesterol) for 24 weeks. Compared with control-HFD, ox-HFD did not affect plasma lipid levels, but it did affect hepatic lipid levels [total cholesterol, 40.9 mg·g-1(ox-HFD) versus 3.2 (control-HFD) mg·g-1; triglycerides, 28.0 (ox-HFD) versus 5.7 (control-HFD) mg·g-1]. Ox-HFD increased lipid accumulation as well as recruitment of inflammatory cells when compared to control-HFD. We then examined the effects of Ez, 0.2 mg·kg-1·day-1for 12 weeks. In addition to a significant reduction in dyslipidemia, Ez alleviated biochemical and pathological aspects of steatosis. Dietary oxysterols aggravate steatosis in nonhuman primates. Treatment with Ez may be a novel therapeutic approach to NAFLD by alleviating dyslipidemia.
authors.affiliation: Department of Life Sciences and Bioethics Graduate School of Medical and Dental Sciences Tokyo Medical and Dental University Japan.
authors.forename: Michiyo
authors.initials: M
authors.lastname: Deushi
authors.affiliation: Department of Life Sciences and Bioethics Graduate School of Medical and Dental Sciences Tokyo Medical and Dental University Japan.
authors.forename: Mizuko
authors.initials: M
authors.lastname: Osaka
authors.affiliation: Department of Cardiovascular Medicine Graduate School of Medical Sciences Kyushu University Fukuoka Japan.
authors.forename: Kaku
authors.initials: K
authors.lastname: Nakano
authors.affiliation: Department of Agricultural Chemistry School of Agriculture Meiji University Kanagawa Japan.
authors.forename: Kyoichi
authors.initials: K
authors.lastname: Osada
authors.affiliation: Department of Cardiovascular Medicine Graduate School of Medical Sciences Kyushu University Fukuoka Japan.
authors.forename: Kensuke
authors.initials: K
authors.lastname: Egashira
authors.affiliation: Department of Life Sciences and Bioethics Graduate School of Medical and Dental Sciences Tokyo Medical and Dental University Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Yoshida
keywords: Niemann–Pick C1‐like1; dietary oxysterols; ezetimibe; nonalcoholic fatty liver disease; nonhuman primate; steatosis