Project description:Hepatocytes consist of subpopulations namely mature hepatocytes and small hepatocytes. Alhtough they have differet proliferative capabiliary in vitro, the difference between two populations has not been examined by transcrptome.
Project description:In order to characterize iHep cells more precisely, we conducted global gene expression analyses using microarrays to compare among the gene expression profiles of MEFs, iHep cells and adult mouse hepatocytes.
Project description:Germline cell-derived pluripotent stem cells (GPSCs) are similar to embryonic stem (ES) cells in that they can proliferate intensively and differentiate into a variety of cell types, including cardiomyocytes and neurons. In this report, mouse GPSCs were induced to differentiate into hepatocytes with very high efficiency, and demonstrated, for the first time, to be functional. These hepatocytes were characterised at cellular and molecular levels. The GPSC-derived hepatocytes not only expressed hepatic markers, but were also metabolically active as shown by albumin and haptoglobin secretion, urea synthesis, glycogen storage and indocyanine green uptake. Previous studies have revealed some inherent differences in gene expression between undifferentiated mouse ES cells and GPSCs. We wanted to investigate whether this difference may impact on the hepatocyte differentiation capacity of the GPSCs. Large-scale gene expression profiling revealed a strong similarity between GPSC and ES cells at different stages of induced hepatic differentiation. Moreover, Pearson correlation analysis of the microarray datasets revealed that, at late hepatic differentiation stages, the in vitro-derived cells were closer to fetal mouse primary hepatocytes. Thus, adult GPSCs offer great potential for cell ment therapy for a wide variety of liver diseases.
Project description:Transcriptomic profiling of primary human hepatocytes after treatment with 2 glitazones (TRO and ROSI) and 2 glitazars (MURA and TESA) Singe-Channel Samples: We have analysed changes in gene expression profiles in primary human hepatocytes after a 24 h treatment with various concentrations of glitazones and glitazars Dual-Channel Samples: We have analysed changes in gene expression profiles in primary human hepatocytes and differentiated human hepatoma HepaRG cells after a 24 h treatment with various concentrations of glitazones and glitazars
Project description:Germline cell-derived pluripotent stem cells (GPSCs) are similar to embryonic stem (ES) cells in that they can proliferate intensively and differentiate into a variety of cell types, including cardiomyocytes and neurons. In this report, mouse GPSCs were induced to differentiate into hepatocytes with very high efficiency, and demonstrated, for the first time, to be functional. These hepatocytes were characterised at cellular and molecular levels. The GPSC-derived hepatocytes not only expressed hepatic markers, but were also metabolically active as shown by albumin and haptoglobin secretion, urea synthesis, glycogen storage and indocyanine green uptake. Previous studies have revealed some inherent differences in gene expression between undifferentiated mouse ES cells and GPSCs. We wanted to investigate whether this difference may impact on the hepatocyte differentiation capacity of the GPSCs. Large-scale gene expression profiling revealed a strong similarity between GPSC and ES cells at different stages of induced hepatic differentiation. Moreover, Pearson correlation analysis of the microarray datasets revealed that, at late hepatic differentiation stages, the in vitro-derived cells were closer to fetal mouse primary hepatocytes. Thus, adult GPSCs offer great potential for cell ment therapy for a wide variety of liver diseases. Mouse ES cells and GPSCs at various times of hepatocyte differentiation, compared to embryonal (E16) and postnatal (PN1) mouse primary hepatocytes. The supplementary file 'GSE19044_non-normalized.txt' contains non-normalized data for Samples GSM471318-GSM471359.
Project description:We generated chimeric mice with livers that were predominantly repopulated with human hepatocytes. Hepatocytes were isolated from the chimeric mouse livers and their gene expressions were compared with hepatocytes isolated from normal human livers . Cluster and principal components analyses showed that gene expression profiles of hepatocytes from the chimeric mice and those from normal human livers were extremely closed. Additionally, we performed microarray experiments to examine gene expression in human tissues. This data was used for comparison with hepatocytes. A total of 22 tissues (bone marrow, cerebellum, colon, cortex, fetal brain, heart, kidney, liver, lung, pancreas, prostate, salivary gland, skeletal muscle, small intestine, spinal cord, spleen, stomach, testes, thymus, thyroid, trachea and uterus) were examined.
Project description:In order to characterize iHep cells more precisely, we conducted global gene expression analyses using microarrays to compare among the gene expression profiles of MEFs, iHep cells and adult mouse hepatocytes. Three MEF samples that were individually prepared from 13.5 days post coitum (dpc) embryos, three types of iHep cells and hepatocytes obtained from the adult mouse liver were used.