Project description:Hepatocytes endogenously express high levels of the enzyme tryptophan dehydrogenase (TDO2), in the current study we explore the effect of reduced oxygen on hepatocyte Tryptophan metabolism
Project description:Endothelial cells, and many other types of cells too, physiologically reside in low O2 environments (~ 2-13% O2 or 15-60 mmHg pO2; [PCN]) relevantly to atmospheric O2 (~ 21% or 160 mmHg pO2 at sea level) in vivo. Such PCN is critical for endothelial functions. The majority of our current knowledge regarding the cellular and signaling mechanisms governing endothelial functions, however, is built on endothelial models established under atmospheric O2 (~21% O2). Herein, we comapred the transcriptional profiles between HUVE and HUAE cells cultured and expanded under PCN (3% oxygen) and standard culture normoxia (21% O2).
Project description:Endothelial cells, and many other types of cells too, physiologically reside in low O2 environments (~ 2-13% O2 or 15-60 mmHg pO2; [PCN]) relevantly to atmospheric O2 (~ 21% or 160 mmHg pO2 at sea level) in vivo. Such PCN is critical for endothelial functions. The majority of our current knowledge regarding the cellular and signaling mechanisms governing endothelial functions, however, is built on endothelial models established under atmospheric O2 (~21% O2). Herein, we comapred the transcriptional profiles between HUVE and HUAE cells cultured and expanded under PCN (3% oxygen) and standard culture normoxia (21% O2). We established human umbilical vein (HUVE) and artery (HUAE) endothelial cell cultures under PCN (3% O2; 20-25 days) and SCN (21% O2), and examined the global gene expression using Affymetrix U133 plus 2.0 microarray chips.
Project description:To investigate sex differences at the transcriptome level in human pulmonary microvascular endothelial cells (HPMECs) from healthy male and female donors basally (in normoxia) and in hypoxic conditions. RNA-seq was performed on male (n=3) and female (n=4) HPMECs that were cultured in conditions of physiological shear stress (PMID: 36730645) in normoxia (21% O2) or in hypoxia (1% O2) for either 24 or 48 hours.
Project description:Purpose: The goal of this study is to investigate the role of interplay between circadian clock and oxygen-sensing pathways in determining myogenic progenitor cell fate. Methods: Total RNAs were extracted from wild-type and Bmal1-/- myoblasts following exposure to normoxia (21% O2) or hypoxia (1% O2) for 6 hours, and subjected to RNA-sequencing. Results: There were significantly up-regulated (443 in normoxia versus 477 in hypoxia) and down-regulated (745 in normoxia versus 796 in hypoxia) genes in Bmal1-/- cells compared to wild-type, with a large degree of overlap between hypoxia and normoxia, although the fold change of differential gene expression was generally greater under hypoxia versus normoxia. Conclusion: Loss of Bmal1 in myoblasts leads to a premature differentiation-prone transcriptome, which was exaggerated following exposure to hypoxia.
Project description:We compared the transcriptome at gene expression level in hypoxic and normoxic conditions. The transcriptome of cells cultured at three different timepoints, 2h, 24 h and 7 days with three different cell lines in normoxia and hypoxia was compared 18 samples total, 3 replicates in each conditions, 2h, 24 h and 7day timepoints in hypoxia and normoxia
Project description:We compared the transcriptome at gene expression level in hypoxic and normoxic conditions. The transcriptome of cells cultured at three different timepoints, 2h, 24 h and 7 days with three different cell lines in normoxia and hypoxia was compared
Project description:To test if CDK8 acts directly at HIF1A target genes, we performed ChIP-seq experiments in HCT116 cells under normoxic and hypoxic conditions. ChIP-seq for CDK8 versus Input under normoxia and 24hrs hypoxia (1% O2).
Project description:We have employed whole genome microarray expression profiling as a discovery platform to identify genes with differential expression in WT and hif1α mutants and consequent different response to normoxia or hypoxia conditions. Two different conditions were considered: 50 hpf mutants and WT in normoxia, 50 hpf mutants and WT after hypoxia chamber treatment (2 hours after 3% O2)
Project description:We investigated the effect of low oxygen culture on the proliferation and hair inductive capacity of human dermal papilla cells (DPCs) and dermal sheath cells (DSCs). DPCs and DSCs were cultured in atmospheric/hyperoxia (20% O2), physiological/normoxia (6% O2), or hypoxia (1% O2) conditions, respectively. Proliferation of DPCs and DSCs was highest under normoxia. Hypoxia inhibited proliferation of DPCs but enhanced proliferation of DSCs. In DPCs, hypoxia down-regulated expression of hair inductive capacity-related genes, including BMP4, LEF1, SOX2, and VCAN, and normoxia up-regulated expression of ALP. In DSCs, both normoxia and hypoxia up-regulated SOX2 expression, and hypoxia down-regulated BMP4 expression. Microarray analysis revealed increased expression of pluripotency-related genes, including SPRY, NR0B1, MSX2, IFITM1, and DAZL, under hypoxia. In an in vivo hair follicle reconstitution assay, cultured DPCs and DSCs were transplanted with newborn mouse epidermal keratinocytes into nude mice using a chamber method. In DPCs, normoxia allowed the most efficient induction of hair follicles. In DSCs, hypoxia allowed the most efficient induction and maturation of hair follicles. These results suggest that low oxygen culture enhances the proliferation and maintains functions of human DPCs and DSCs and could be used for skin engineering and clinical applications.