Project description:Transcriptional profiling of human mesenchymal stem cells comparing normoxic MSCs cells with hypoxic MSCs cells. Hypoxia may inhibit senescence of MSCs during expansion. Goal was to determine the effects of hypoxia on global MSCs gene expression.
Project description:Comparison of each cell mRNA expression pattern. We generated osteoblasts like cell by direct reprogramming technique from human fibroblast. To confirm dOB gene expression pattern similarity to osteoblasts, we analyzed and compared the gene expression profiles of the samples by cDNA microarry. These analysis revealed that dOB are similar to osteoblats in comparative level to MSC-OB.
Project description:Comparison of each cell mRNA expression pattern. We generated osteoblasts like cell by direct reprogramming technique from human fibroblast. To confirm dOB gene expression pattern similarity to osteoblasts, we analyzed and compared the gene expression profiles of the samples by cDNA microarry. These analysis revealed that dOB are similar to osteoblats in comparative level to MSC-OB. 6 samples.
Project description:Gene methylation profiling of immortalized human mesenchymal stem cells comparing HPV E6/E7-transfected MSCs cells with human telomerase reverse transcriptase (hTERT)- and HPV E6/E7-transfected MSCs. hTERT may increase gene methylation in MSCs. Goal was to determine the effects of different transfected genes on global gene methylation in MSCs.
Project description:Gene expression profiling of immortalized human mesenchymal stem cells with hTERT/E6/E7 transfected MSCs. hTERT may change gene expression in MSCs. Goal was to determine the gene expressions of immortalized MSCs.
Project description:Transcriptional profiling of human mesenchymal stem cells comparing normoxic MSCs cells with hypoxic MSCs cells. Hypoxia may inhibit senescence of MSCs during expansion. Goal was to determine the effects of hypoxia on global MSCs gene expression. Two-condition experiment, Normoxic MSCs vs. Hypoxic MSCs.
Project description:To investigation the role of PTH and Kindlin-2 in bone development, we performed single-cell RNA-sequencing. From Con-veh, Con-PTH, cKO-veh, cKO-PTH, we profiled more than 20k single cells, including multi-potent mesenchymal stromal cells (MSC), osteoprogenitors, osteoblasts, chondrocytes, fibroblasts, endothelial cells, smooth muscle cells, skeletal muscle cells, pericytes, and schwann cells. We found proportion of part of these cells were significant altered by PTH or Kindlin-2 loss, especially for MSC, osteoblast, chondrocyte, and fibroblast. Transcriptomic analysis revealed gene expression was dramatically regulated by PTH or Kindlin-2 loss.
Project description:Kynureninase is a member of a large family of catalytically diverse but structurally homologous pyridoxal 5'-phosphate (PLP) dependent enzymes known as the aspartate aminotransferase superfamily or alpha-family. The Homo sapiens and other eukaryotic constitutive kynureninases preferentially catalyze the hydrolytic cleavage of 3-hydroxy-l-kynurenine to produce 3-hydroxyanthranilate and l-alanine, while l-kynurenine is the substrate of many prokaryotic inducible kynureninases. The human enzyme was cloned with an N-terminal hexahistidine tag, expressed, and purified from a bacterial expression system using Ni metal ion affinity chromatography. Kinetic characterization of the recombinant enzyme reveals classic Michaelis-Menten behavior, with a Km of 28.3 +/- 1.9 microM and a specific activity of 1.75 micromol min-1 mg-1 for 3-hydroxy-dl-kynurenine. Crystals of recombinant kynureninase that diffracted to 2.0 A were obtained, and the atomic structure of the PLP-bound holoenzyme was determined by molecular replacement using the Pseudomonas fluorescens kynureninase structure (PDB entry 1qz9) as the phasing model. A structural superposition with the P. fluorescens kynureninase revealed that these two structures resemble the "open" and "closed" conformations of aspartate aminotransferase. The comparison illustrates the dynamic nature of these proteins' small domains and reveals a role for Arg-434 similar to its role in other AAT alpha-family members. Docking of 3-hydroxy-l-kynurenine into the human kynureninase active site suggests that Asn-333 and His-102 are involved in substrate binding and molecular discrimination between inducible and constitutive kynureninase substrates.