Project description:Disturbance of heterologous cell communication is associated with a structural reorganization of the vascular niche, a process called capillarization, which is already initiated in early stages of liver tumor development. In this study, the molecular characterization of endothelial cell (EC) subpopulations from healthy livers and yes-associated protein (Yap)-induced liver tumors revealed a dynamic crosstalk between liver sinusoidal endothelial cells (LSECs) and capillary endothelial cells (CECs). Initial paracrine stimuli from parenchymal cells include the Yap/Tead4 target gene osteopontin (Opn), which promotes CECs expansion through the induction of c-Met and sensitization towards LSEC-derived hepatocyte growth factor (Hgf). In addition, Yap/Tead4-induced C-C motif chemokine ligand 2 (Ccl2) recruits bone-marrow-derived macrophages (BMDMs) with an unpolarized phenotype (M0) to the perivascular space of expanding CECs.
Project description:The onset of the liver inflamentation in the Sox17+/- embryos. The expression of Cxcl10, Cxcl2, Cxcl1 and stress-induced heat shock protein Hspa1a and Hspa1b were elevated in Sox17+/- livers at 17dpc, as compared with the wildtype livers.
Project description:The onset of the liver inflamentation in the Sox17+/- embryos. The expression of Cxcl10, Cxcl2, Cxcl1 and stress-induced heat shock protein Hspa1a and Hspa1b were elevated in Sox17+/- livers at 17dpc, as compared with the wildtype livers. Total RNAs from liver tissues of wildtype and Sox17+/- mice at 17dpc were subjected to microarray analyses. Two biological replicates of each genotype were analyzed.
Project description:The cell-specific role of lysosomal protease cathepsin D (CtsD) in liver fibrosis is not completely clear. This study reports that while CtsD is highly expressed in liver macrophages of cirrhotic patients, CtsD deletion in macrophages resulted in enhanced liver fibrosis. For this scope, a macrophage-CtsD knock-out mouse (CtsDMac) model was generated. Livers obtained from the mouse model and from its control were analyzed by shotgun label-free quantitative (LFQ) proteomics.
Project description:Transcriptional Profiling of mouse liver tissues comparing normal tissues, livers arising from transgene expression after hepatocy transplantation using the comparative hepatocyte growth assay, and livers with transgene turned off for 4 and 12 weeks. Experimental groups: Control normal liver; Endstage liver tumors, livers with transgene turned off for 4 weeks, and livers with transgene turned off for 12 weeks.
Project description:There is a unique histological structure termed hepatic crown-like structure (hCLS), in which CD11c-positive macrophages surround dead or dying hepatocytes with large lipid droplets in NASH livers. To characterize gene expression patterns, we performed microarray analysis using hepatic resident macrophages. CD11c-positive macrophages exhibited distinct polarization profiles from typical M1 and M2 macrophages, and there were clear differences in the gene expression profiles from CD11c-negative macrophages.
Project description:Rb null embryos exhibit defective fetal liver erythropoiesis. We used microarrays to compare Wt and Rb null fetal livers and to analyse gene expression differences which accompany and may underlie Rb null fetal liver degeneration, erythroid failure, and erythropoietic island dissolution. We used microarrays to compare Wt and Rb null fetal livers and analyse gene expression changes which accompany and may underlie fetal liver. Keywords: retinoblastoma, fetal liver, erythroblast, macrophage, cell death
Project description:To investigate the function of miRNAs in liver, we obtained liver tissues from nonsteatotic individuals and fatty livers from patients with nonalcoholic fatty liver disease (NAFLD). Patients due to excessive alcohol consumption, autoimmune liver disease, viral hepatitis and diabetes were excluded. Nonsteatotic livers were collected from the normal region of the livers from donors who received liver resection due to liver hemangioma, and were defined as those with NASH activity scores of 0 We then performed miRNA sequencing using livers from two NAFLD patients and two nonsteatotic individuals.