Project description:Homozygous gene targeting replacement mouse lines, one expressing the human apolipoproteinA-I (A-I k-in) and the other the natural variant apolipoproteinA-IMilano (A-IM k-in), have been used for the present study We used microarray to investigate intrinsic differences in the hepatic gene expression of mice expressing human apoA-I or A-IM,
Project description:Bile acids are not only physiological detergents facilitating nutrient absorption, but also signaling molecules regulating metabolic homeostasis. We reported recently that transgenic expression of CYP7A1 in mice stimulated bile acid synthesis and prevented Western diet-induced obesity, insulin resistance and hepatic steatosis. The aim of this experiment is to determine the impact of induction of hepatic bile acid synthesis on liver metabolism by determining hepatic gene expression profile in CYP7A1 transgenic mice. CYP7A1 transgenic mice and wild type control mice were fed either standard chow diet or high fat high cholesterol Western diet for 4 month. Hepatic gene expressions were measured by microarray analysis. Our results indicate that hepatic bile acid synthesis is closely linked to cholesterogenesis and lipogenesis, and maintaining bile acid homeostasis is improtant in hepatic metabolic homeostasis.
Project description:Bile acids are not only physiological detergents facilitating nutrient absorption, but also signaling molecules regulating metabolic homeostasis. We reported recently that transgenic expression of CYP7A1 in mice stimulated bile acid synthesis and prevented Western diet-induced obesity, insulin resistance and hepatic steatosis. The aim of this experiment is to determine the impact of induction of hepatic bile acid synthesis on liver metabolism by determining hepatic gene expression profile in CYP7A1 transgenic mice. CYP7A1 transgenic mice and wild type control mice were fed either standard chow diet or high fat high cholesterol Western diet for 4 month. Hepatic gene expressions were measured by microarray analysis. Our results indicate that hepatic bile acid synthesis is closely linked to cholesterogenesis and lipogenesis, and maintaining bile acid homeostasis is improtant in hepatic metabolic homeostasis. Male aged matched (~ 12-14 weeks) CYP7A1 transgenic mice and their wild type control littermates were fed a standard chow diet or a high fat (42%) high cholesterol (0.2%) diet (Harlan Teklad #88137) for 4 month Four groups (4 mice/group) are included in the experiments: Group 1: WT _ Chow Group 2: CYP7A1-tg + chow Group 3: WT + Western diet Group 4: CYP7A1-tg _ Western diet Total liver mRNA was isolated with a RNeasy kit (Qiagen) and used for microarray analysis.
Project description:INSC94Y transgenic pigs serve as a valuable model for permanent neonatal diabetes mellitus. Through genetically engineered modifications in the insulin (INS) gene, this model presents with impaired insulin secretion, resulting elevated fasting blood-glucose levels (hyperglycemia) [1].One of the severe complications of diabetes mellitus are hypoglycemia-mediated morphological abnormalities in the retina, also described as diabetic retinopathy (DR). Adjacent to the retina lies the vitreous, a gelatinous, highly hydrated matrix, which is important for ocular function and retinal physiology. It contains variety of proteins and signaling molecules, which are useful for the characterization of the biological activity of the vitreous itself, and may help to elucidate molecular processes occurring in the retina, especially under pathophysiological conditions and in disease. To gain insight into the proteomic profile of porcine vitreous and detect possible differences relevant to DR pathogenesis, we used discovery proteomics for analysis of INSC94Y vitreous compared to wild-type controls. Reference: [1] Renner, S.; Braun-Reichhart, C.; Blutke, A.; Herbach, N.; Emrich, D.; Streckel, E.; Wunsch, A.; Kessler, B.; Kurome, M.; Bahr, A.; et al. Permanent neonatal diabetes in INS(C94Y) transgenic pigs. Diabetes 2013, 62, 1505-1511, doi:10.2337/db12-1065.
Project description:We report the application of Whole Genome Bisulfite Sequencing to identify differentially methylated regions (DMR) in two RNAi transgenic lines, with dowregulated expression of the demeter-like gene PtaDML10, in comparisson to wild-type plants of Populus tremula x Populus alba plants.
Project description:The causative role of activated Hedgehog signaling in liver fibrosis was investigated in vivo. Using hydrodynamics-based transfection, a transgenic mouse model has been developed that expresses Sonic Hedgehog (SHH), a ligand for Hedgehog signaling, in the liver. Levels of hepatic fibrosis and fibrosis-related gene expression were assessed in the model.