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  • Title: Impact of artificial sunlight therapy on the progress of non-alcoholic fatty liver disease in rats.
    Author: Nakano T, Cheng YF, Lai CY, Hsu LW, Chang YC, Deng JY, Huang YZ, Honda H, Chen KD, Wang CC, Chiu KW, Jawan B, Eng HL, Goto S, Chen CL.
    Journal: J Hepatol; 2011 Aug; 55(2):415-25. PubMed ID: 21184788.
    Abstract:
    BACKGROUND & AIMS: Non-alcoholic steatohepatitis (NASH) is recognized as the most severe form of non-alcoholic fatty liver disease, with likely progression to liver cirrhosis and hepatocellular carcinoma. However, there is no unified standard for diagnosis and therapeutics. This study aimed to characterize lipid transfer/metabolic proteins as non-invasive diagnostic markers, and to evaluate the therapeutic effects of phototherapy on the progression of NASH in rats. METHODS: Lewis rats given a choline-deficient and iron-supplemented l-amino acid-defined (CDAA) diet and Zucker fa/fa rats were used as a diet-induced and an obesity-related NASH models, respectively, with or without phototherapy. RESULTS: Serum apolipoprotein E and low molecular weight-adiponectin levels were gradually reduced and reached the lowest level at fatty liver/NASH stage both in CDAA diet-induced NASH model and in genetically obese model. Total-adiponectin levels were dramatically elevated after NASH was established in CDAA diet-induced NASH model. Phototherapy ameliorated hepatocyte apoptosis, inflammation, fibrosis, and insulin/leptin resistance caused by CDAA diet with alteration of the levels of lipid transfer/metabolic proteins and elevation of the circulating active form of vitamin D(3). Vitamin D(3) supplementation ameliorated NASH progression in CDAA diet-induced NASH model. However, phototherapy failed to ameliorate the obesity and steatosis, suggesting that phototherapy may possess anti-inflammatory/fibrotic activity rather than anti-obesity/steatotic activity. CONCLUSIONS: These results suggest that serum lipid transfer/metabolic proteins and vitamin D(3) status may be effective biomarkers for non-invasive diagnosis of NASH progression, and that phototherapy may be a good complementary therapy for NASH because of its regulation of lipid transfer/metabolic proteins and vitamin D(3).
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