Project description:Leukocyte flux contributes to thrombus formation in deep veins under pathologic conditions, but mechanisms which inhibit venous thrombosis are incompletely understood. Ectonucleotide di(tri)phosphohydrolase 1 (ENTPD1 or Cd39), an ectoenzyme which catabolizes extracellular adenine nucleotides, is embedded on the surface of endothelial cells and leukocytes. We hypothesized that under venous stasis conditions CD39 regulates inflammation at the vein:blood interface in a murine model of deep vein thrombosis. Gene expression profiling of WT and Cd39-null mice revealed 76 differentially-expressed inflammatory genes that were significantly upregulated in Cd39-deleted mice after venous thrombosis; and validation experiments confirmed high expression of several key inflammatory mediators.
Project description:First, lentivirus-mediated overexpression of FDFT1 and lentivirus-mediated knockdown of FDFT1 were performed in CT26 cells. Then control CT26 cells, FDFT1 overexpressing CT26 cells and FDFT1 knockdown CT26 cells were cultured under normal medium or fasting mimic medium. Fasting mimic medium was done by incubating cells in glucose-free DMEM (Gibco, USA) supplemented with 0.5g/L glucose and 1% FBS for 48h. So we have 6 groups: control CT26 cells, FDFT1 overexpressing CT26 cells, FDFT1 knockdown CT26 cells, control CT26 cells-under fasting mimic medium, FDFT1 overexpressing CT26 cells- under fasting mimic medium, FDFT1 knockdown CT26 cells- under fasting mimic medium.
Project description:Though the pathophysiology of preeclampsia (PE) is unclear worldwide, placental hypoxia has been implicated in the pathologic processes of PE.In this study, we profiled the transcriptome in BeWo and JEG-3 cells cultured in hypoxic condition or normal ones based on the RNA sequencing dataset. After filtered the low-quality ones, the RNA readers was aligned to human genome hg19 by TopHat and then assembled by Cufflinks. The expression value of each transcript was calculated and consequently differentially expressed genes were screened out. CD39 and ZDHHC14 were found to have both different mRNA in hypoxic cells and abnormal methylation level in severely preeclamptic placentas. The mRNA expression of CD39 and ZDHHC14 in placental tissues were analyzed using qRT-PCR. The differential methylated regions (DMRs) of CD39 and ZDHHC14 were confirmed by MassARRY EppiTYPER. The effect of hypoxia on trophoblast cells was detected with western blotting and enzyme linked immunosorbent assay. The results showed CD39 and ZDHHC14were significantly lower in severe PE placenta, hypoxia significantly reduced the expression of CD39 and ZDHHC14 and the secretion of CD39 in trophoblast cells. Therefore, we believed hypoxia plays an important role in the processes of severe PE via decreasing the expression of CD39 and ZDHHC14 by changing their methylation level in placenta.