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Time-dependent network analysis reveals molecular targets underying the development of diet-induced obesity and non-alcoholic steatohepatitis.

ABSTRACT: Core diet-induced obesity networks were constructed using Ingenuity pathway analysis (IPA) based on 332 high-fat diet responsive genes identified in liver by time-course microarray analysis (8 time-points over 24 weeks) of high-fat diet fed mice compared to normal diet fed mice. IPA identified five core diet-induced obesity networks with time-dependent gene expression changes in liver. When we merged core diet-induced obesity networks, Tlr2, Cd14 and Ccnd1 emerged as hub genes associated with both liver steatosis and inflammation and were altered in a time-dependent manner. Further protein-protein interaction network analysis revealed Tlr2, Cd14 and Ccnd1 were inter-related through the ErbB/insulin signaling pathway. Dynamic changes occur in molecular networks underlying diet-induced obesity. Tlr2, Cd14 and Ccnd1 appear to be hub genes integrating molecular interactions associated with the development of NASH. Therapeutics targeting hub genes and core diet-induced obesity networks may help ameliorate diet-induced obesity and NASH. Total RNA obtained from isolated liver of C57BL/6J mice fed normal diet or high fat diet for 0, 2, 4, 6, 8, 12, 16, 20 and 24 weeks.

ORGANISM(S): Mus musculus

SUBMITTER: Myung-Sook Choi

PROVIDER: E-GEOD-40481 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Time-dependent network analysis reveals molecular targets underying the development of diet-induced obesity and non-alcoholic steatohepatitis.

Project description:Core diet-induced obesity networks were constructed using Ingenuity pathway analysis (IPA) based on 332 high-fat diet responsive genes identified in liver by time-course microarray analysis (8 time-points over 24 weeks) of high-fat diet fed mice compared to normal diet fed mice. IPA identified five core diet-induced obesity networks with time-dependent gene expression changes in liver. When we merged core diet-induced obesity networks, Tlr2, Cd14 and Ccnd1 emerged as hub genes associated with both liver steatosis and inflammation and were altered in a time-dependent manner. Further protein-protein interaction network analysis revealed Tlr2, Cd14 and Ccnd1 were inter-related through the ErbB/insulin signaling pathway. Dynamic changes occur in molecular networks underlying diet-induced obesity. Tlr2, Cd14 and Ccnd1 appear to be hub genes integrating molecular interactions associated with the development of NASH. Therapeutics targeting hub genes and core diet-induced obesity networks may help ameliorate diet-induced obesity and NASH.

2014-03-01 | GSE40481 | GEO

Macrophage-derived thrombospondin1 promotes obesity-associated non-alcoholic fatty liver disease

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Toll-like receptors 2 and 4 control adaptive β-cell expansion in diet-induced obesity

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RNAseq of livers of mice fed high fat high sugar diet and either untreated or treated with curcumin liposomes or calcitriol liposomes

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Gene expression profiles of livers and liver tumors from mice fed high-fat diet and high fructose-glucose solution for 52 weeks

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2016-07-25 | E-GEOD-67679 | biostudies-arrayexpress

Gene expression profiles of livers from mice fed high-fat diet and high fructose-glucose solution for 8 weeks

Project description:The lack of a preclinical model of nonalcoholic steatohepatitis (NASH) and hepatocellular cancer (HCC) that recapitulates human disease is a major barrier to therapeutic development. We report a high fat-high sugar diet-induced NASH and HCC in a stable isogenic 129S1/SvImJ crossed with C57Bl/6J mice. Following diet initiation, there was sequential development of steatosis (4-8 weeks), steatohepatitis with ballooning and Mallory-Denk bodies (12-16 weeks), progressive fibrosis (16 week onwards) and spontaneous HCC (32-52 weeks). The mice developed obesity, insulin resistance and dyslipidemia. There was concordance with the human NASH transcriptome (FDR 0.001) with activation of lipogenic, inflammatory and apoptotic pathways relevant in humans. The HCC gene signature resembled S1 and S2 human HCC subclass (FDR 0.01 for both). This simple model of NASH and HCC that resembles human disease in terms of its triggers, physiological and biochemical parameters, histology, transcriptomic profile, and outcomes can facilitate preclinical development for these conditions. 129S1/SvImJ;C57Bl/6J (129/B6) mice were fed with high-fat diet (Western Diet) and high fructose-glucose solution (Sugar Water) (WD SW) or chow diet (CD) for 8 weeks, and total RNA samples were isolated from liver tissues for genome-wide expression profiling.

2016-07-25 | E-GEOD-67678 | biostudies-arrayexpress

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M-NM-2-Cryptoxanthin suppresses inflammatory gene expression in diet-induced nonalcoholic steatohepatitis in mice

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2014-05-28 | E-GEOD-51432 | biostudies-arrayexpress

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