학술논문
Endogenous catalase delays high-fat diet-induced liver injury in mice
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- 영문명
- Endogenous catalase delays high-fat diet-induced liver injury in mice
- 발행기관
- 대한생리학회-대한약리학회
- 저자명
- Lingjuan Piao Jiyeon Choi Guideock Kwon Hunjoo Ha
- 간행물 정보
- 『The Korean Journal of Physiology & Pharmacology』제21권 제3호, 317~325쪽, 전체 9쪽
- 주제분류
- 의약학 > 의학일반
- 파일형태
- 발행일자
- 2017.01.01
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국문 초록
영문 초록
Non-alcoholic fatty liver disease (NAFLD) has become the most prevalent liver disease in parallel with worldwide epidemic of obesity. Reactive oxygen species (ROS) contributes to the development and progression of NAFLD. Peroxisomes play an important role in fatty acid oxidation and ROS homeostasis, and catalase is an antioxidant exclusively expressed in peroxisome. The present study examined the role of endogenous catalase in early stage of NAFLD. 8-week-old male catalase knock-out (CKO) and age-matched C57BL/6J wild type (WT) mice were fed either a normal diet (ND: 18% of total calories from fat) or a high fat diet (HFD: 60% of total calories from fat) for 2 weeks. CKO mice gained body weight faster than WT mice at early period of HFD feeding. Plasma triglyceride and ALT, fasting plasma insulin, as well as liver lipid accumulation, inflammation (F4/80 staining), and oxidative stress (8-oxo-dG staining and nitrotyrosine level) were significantly increased in CKO but not in WT mice at 2 weeks of HFD feeding. While phosphorylation of Akt (Ser473) and PGC1α mRNA expression were decreased in both CKO and WT mice at HFD feeding, GSK3β phosphorylation and Cox4-il mRNA expression in the liver were decreased only in CKO-HF mice. Taken together, the present data demonstrated that endogenous catalase exerted beneficial effects in protecting liver injury including lipid accumulation and inflammation through maintaining liver redox balance from the early stage of HFD-induced metabolic stress.
목차
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