Project description:Genetic variation, in addition to environmental influences like diet, can govern the expression levels of microRNAs (miRNAs). MiRNAs are commonly found to operate cooperatively in groups to regulate gene expression. To investigate this, we combined small RNA sequencing, clinical phenotypes, and microarray data measuring gene expression from an outbred mouse model, the Diversity Outbred population. In the DO population, each individual has a distinct genome that is a mosaic of 8 inbred founder strains. We used these data to identify co-regulated modules of miRNAs and genes that are influenced by genetics and diet, and identify relationships between the modules and phenotypes in over 200 DO mice.
Project description:Microarray gene expression was performed on mouse livers. Gene expression profiles were studies on 3 PTU treated and 3 PTU followed by T3 treated mice.
Project description:To identify putative lncRNA changes in the livers of db/db mice and C57 mice, we isolated the liver tissues and carried out a microarray analysis. Here, we found significant changes of lncRNAs in the livers of db/db mice. Among them, abnormal expression of ultraconserved elements was noticed.
Project description:We used microarray to study the global transcriptomic changes in the livers of SIRT7 KO mice, which develop spontaneous nonalcoholic fatty liver disease.
Project description:Non-alcoholic steatohepatitis (NASH) is becoming one of the leading causes of hepatocellular carcinoma (HCC), replacing viral HBV-, HCV-, and alcohol-related chronic liver diseases as major etiological risk of factors for HCC. The goal of the present study was to investigate transcriptomic alterations in the livers of male C57BL/6J mice fed a choline- and folate-deficient (CFD) diet. Feeding mice a CFD diet for 12 weeks caused NASH-like liver injury exhibiting uniform morphological features of human NASH. High-throughput whole-genome transcriptomic analysis showed that 1750 genes were differentially expressed (344 down-regulated and 1396 up-regulated) in the livers of mice fed a CFD diet as compared to control mice. The functional pathway analysis revealed that these differentially-expressed genes were associated with diverse cellular processes, including cellular growth and differentiation, cell-to-cell signaling and interaction, lipid metabolism, inflammation, fibrosis, molecular transport, and drug metabolism. These findings demonstrate that deregulation of global gene expression is the prominent fundamental feature of NASH in mice induced by a CFD diet.
Project description:To examine whether energy starvation caused by the increase in rRNA transcription affects liver metabolism, we compared the gene expression profiles of WT and NML-KO livers using Affymetrix microarray technology. We analyzed 5 livers of WT mice and 5 livers of NML-KO mice.
Project description:To identify novel transcriptional factors involved in dysfunctional hepatic lipids homeostasis in obesity, mRNA microarray analysis were performed to of livers of ob/ob mice, a widely used obese model, and C57BL/6J control mice. Chow-fed ob/ob and C57BL/6J mice were housed in a 12 h of light and 12 h of dark cycle and fed ad libitum a regular chow diet. Mice were sacrificed at 16:00 (Zeitgeber Time 8 during light phase). Total RNA was prepared from each liver using TRIzol (Invitrogen). Equal aliquots of total RNA from each of four mouse livers in each group were pooled and used for biotin labeling as described in the Affymetrix technical bulletin. Then the transcriptional profiles of samples were probed using the Gene-Chip Mouse Genome 430 2.0 arrays.