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Fucoxanthin inhibits hepatic oxidative stress, inflammation, and fibrosis in diet-induced nonalcoholic steatohepatitis model mice.
Biochemical and Biophysical Research Communications ( IF 3.1 ) Pub Date : 2020-05-29 , DOI: 10.1016/j.bbrc.2020.05.050
Naoki Takatani 1 , Yuka Kono 1 , Fumiaki Beppu 1 , Yuko Okamatsu-Ogura 2 , Yumiko Yamano 3 , Kazuo Miyashita 1 , Masashi Hosokawa 1
Affiliation  

Nonalcoholic steatohepatitis (NASH) is associated with hepatocyte injury, excessive oxidative stress, and chronic inflammation in fatty liver, and can progress to more severe liver diseases, such as cirrhosis and hepatocellular carcinoma. However, currently there are no effective therapies for NASH. Marine carotenoid, fucoxanthin (Fx), abundant in brown seaweeds, has variable biological properties, such as anti-cancer, anti-inflammatory, anti-oxidative and anti-obesity. However, the effect of Fx on the development of NASH has not been explored. We investigated the protective effects of Fx in diet-induced NASH model mice fed choline-deficient L-amino acid-defined high fat diet (CDAHFD). Fx administration significantly attenuated liver weight gain and hepatic fat accumulation, resulting in the alleviation of hepatic injury. Furthermore, the Fx-fed mice, not only exhibited reduced hepatic lipid oxidation, but also decreased mRNA expression levels of inflammation and infiltration-related genes compared to that of the CDAHFD-fed mice. Moreover, fucoxanthinol and amarouciaxanthin A, two Fx metabolites exerted anti-inflammatory effects in the liver via inhibiting the chemokine production in hepatocytes. In case of fibrosis, one of the features of advanced NASH, the expression of fibrogenic factors including activated-hepatic stellate cell marker was significantly decreased in the liver of Fx-fed mice. Thus, the present study elucidated that dietary Fx not only inhibited hepatic oxidative stress and inflammation but also prevented early phase of fibrosis in the diet-induced NASH model mice.



中文翻译:

岩藻黄质抑制饮食诱导的非酒精性脂肪性肝炎模型小鼠的肝氧化应激,炎症和纤维化。

非酒精性脂肪性肝炎(NASH)与脂肪肝中的肝细胞损伤,过度的氧化应激和慢性炎症有关,并可发展为更严重的肝脏疾病,例如肝硬化和肝细胞癌。但是,目前尚无有效的NASH治疗方法。海洋类胡萝卜素,岩藻黄质(Fx),在褐色海藻中含量丰富,具有可变的生物学特性,例如抗癌,抗炎,抗氧化和抗肥胖症。但是,尚未探索Fx对NASH发育的影响。我们调查了Fx在饲喂胆碱缺陷型L-氨基酸定义的高脂饮食(CDAHFD)的饮食诱导的NASH模型小鼠中的保护作用。Fx给药显着降低了肝脏的体重增加和肝脂肪的积累,从而减轻了肝损伤。此外,与CDAHFD喂养的小鼠相比,Fx喂养的小鼠不仅表现出降低的肝脂质氧化作用,而且还降低了炎症和浸润相关基因的mRNA表达水平。此外,岩藻黄质和金刚烷黄质A,两种Fx代谢产物,通过抑制肝细胞趋化因子的产生,在肝脏中发挥抗炎作用。如果发生纤维化(这是晚期NASH的特征之一),则在Fx喂养的小鼠肝脏中,包括活化肝星状细胞标记在内的纤维化因子的表达显着降低。因此,本研究阐明了饮食Fx不仅抑制了饮食诱导的NASH模型小鼠的肝氧化应激和炎症,而且防止了纤维化的早期阶段。但与CDAHFD喂养的小鼠相比,炎症和浸润相关基因的mRNA表达水平却降低了。此外,岩藻黄质和金刚烷黄质A,两种Fx代谢产物,通过抑制肝细胞趋化因子的产生,在肝脏中发挥抗炎作用。如果发生纤维化(这是晚期NASH的特征之一),则在Fx喂养的小鼠肝脏中,包括活化肝星状细胞标记在内的纤维化因子的表达显着降低。因此,本研究阐明了饮食Fx不仅抑制了饮食诱导的NASH模型小鼠的肝氧化应激和炎症,而且防止了纤维化的早期阶段。但与CDAHFD喂养的小鼠相比,炎症和浸润相关基因的mRNA表达水平却降低了。此外,岩藻黄质和金刚烷黄质A,两种Fx代谢产物,通过抑制肝细胞趋化因子的产生,在肝脏中发挥抗炎作用。如果发生纤维化(这是晚期NASH的特征之一),则在Fx喂养的小鼠肝脏中,包括活化肝星状细胞标记在内的纤维化因子的表达显着降低。因此,本研究阐明了饮食Fx不仅抑制了饮食诱导的NASH模型小鼠的肝氧化应激和炎症,而且防止了纤维化的早期阶段。两种Fx代谢产物通过抑制肝细胞趋化因子的产生而在肝脏中发挥抗炎作用。在纤维化的情况下,这是晚期NASH的特征之一,在Fx喂养的小鼠肝脏中,包括活化肝星状细胞标记在内的纤维化因子的表达显着降低。因此,本研究阐明了饮食Fx不仅抑制了饮食诱导的NASH模型小鼠的肝氧化应激和炎症,而且防止了纤维化的早期阶段。两种Fx代谢产物通过抑制肝细胞趋化因子的产生在肝脏中发挥抗炎作用。在纤维化的情况下,这是晚期NASH的特征之一,在Fx喂养的小鼠肝脏中,包括活化肝星状细胞标记在内的纤维化因子的表达显着降低。因此,本研究阐明了饮食Fx不仅抑制了饮食诱导的NASH模型小鼠的肝氧化应激和炎症,而且防止了纤维化的早期阶段。

更新日期:2020-05-29
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