Project description:Rat iPS M13 cells had different gene expression level compared with that of the adult cells including rat bone marrow cells(BMC) and rat primary ear fibroblasts(PEF). This difference gave rat iPS M13 cells unique characteristics which could then be compared with other species' ES cells or iPS cells like human ES cells and mouse ES cells by the homologue genes comparison to show which species' ES cells or iPS cells were more competitive with the other.
Project description:Rat iPS F65 cells had different gene expression level compared with that of the adult cells including rat bone marrow cells(BMC) and rat primary ear fibroblasts(PEF). This difference gave rat iPS F65 cells unique characteristics which could then be compared with other species' ES cells or iPS cells like human ES cells and mouse ES cells by the homologue genes comparison to show which species' ES cells or iPS cells were more competitive with the other.
Project description:Mouse ES cells had different gene expression level compared with that of the MEF cells. This difference gave the mouse ES cells unique characteristics which could then be compared with other species' ES cells or iPS cells like human ES cells and Rat iPS cells by the homologue genes comparison to show which species' ES cells or iPS cells were more competitive with the other.
Project description:Human ES cells had different gene expression level compared with that of the adult cells including CCD-1079sk and IMR90. This difference gave the human ES cells unique characteristics which could then be compared with other species' ES cells or iPS cells like mouse ES cells and Rat iPS cells by the homologue genes comparison to show which species' ES cells or iPS cells were more competitive with the other.
Project description:Rat somatic lung cell had different gene expression level compared with that of the adult cells including rat bone marrow cells(BMC) and rat primary ear fibroblasts(PEF). This difference gave the rat somatic lung cell unique characteristics which could then be compared with the rat iPS cells by genes comparison to show the gene expression difference between rat somatic lung cells and rat iPS cells.
Project description:Rat somatic heart cell had different gene expression level compared with that of the adult cells including rat bone marrow cells(BMC) and rat primary ear fibroblasts(PEF). This difference gave the rat somatic heart cell unique characteristics which could then be compared with the rat iPS cells by genes comparison to show the gene expression difference between rat somatic heart cells and rat iPS cells.
Project description:Successful reprogramming of differentiated human somatic cells into a pluripotent state would allow creation of patient- and disease-specific stem cells. We previously reported generation of induced pluripotent stem (iPS) cells, capable of germline transmission, from mouse somatic cells by transduction of four defined transcription factors. Here, we demonstrate the generation of iPS cells from adult human dermal fibroblasts with the same four factors: Oct3/4, Sox2, Klf4, and c-Myc. Human iPS cells were expandable and similar to human embryonic stem (ES) cells in morphology, proliferation, surface antigens, gene expression, DNA methylation status of pluripotent cell-specific genes, and telomerase activity. Furthermore, these cells could differentiate into cell types of the three germ layers in vitro and in teratomas. These findings demonstrate that iPS cells can be generated from adult human fibroblasts. Keywords: cell type comparison
Project description:Induced pluripotent stem (IPS) cells have attracted enormous attention due to their vast potential in regenerative medicine, pharmaceutical screening and basic research. The majority of prior established rat IPS cells were generated from somatic cells by retroviral and lentiviral transduction with expression of Oct4, Sox2, Klf4 and c-Myc and using chemical inhibitors of key differentiation pathways. A major difficulty in the application of this technology is the efficient delivery of reprogramming factors and the long-term maintenance of properties of stem cells. Here, we employed the PiggyBac (PB) transposon carrying four 2A peptide-linked reprogramming factors for generating rat IPS cells. These stable rat IPS cells are similar to embryonic stem (ES) cells in morphology, proliferation, teratoma formation, expression characteristic pluripotency markers, developmental potential, and germline transmission. Transcriptional profiling of the IPS cells revealed both pathways in common with ES cells from rat and unique signaling pathway to our cells, including Wnt, TGF and Notch. The cell lines and information obtained in this study will accelerate our understanding of the molecular regulation underlying germline pluripotency and pave the way for exploration of cell-based therapies using the rat. To compare the gene expression profiling between rat IPS cells and ES cells to show if the rat IPS cells had been reprogrammed into pluripotent status like rat ES cells at the gene expression level.
Project description:Induced pluripotent stem (IPS) cells have attracted enormous attention due to their vast potential in regenerative medicine, pharmaceutical screening and basic research. The majority of prior established rat IPS cells were generated from somatic cells by retroviral and lentiviral transduction with expression of Oct4, Sox2, Klf4 and c-Myc and using chemical inhibitors of key differentiation pathways. A major difficulty in the application of this technology is the efficient delivery of reprogramming factors and the long-term maintenance of properties of stem cells. Here, we employed the PiggyBac (PB) transposon carrying four 2A peptide-linked reprogramming factors for generating rat IPS cells. These stable rat IPS cells are similar to embryonic stem (ES) cells in morphology, proliferation, teratoma formation, expression characteristic pluripotency markers, developmental potential, and germline transmission. Transcriptional profiling of the IPS cells revealed both pathways in common with ES cells from rat and unique signaling pathway to our cells, including Wnt, TGF and Notch. The cell lines and information obtained in this study will accelerate our understanding of the molecular regulation underlying germline pluripotency and pave the way for exploration of cell-based therapies using the rat.
Project description:In comprehensive glycome analysis with a high-density lectin microarray, we have previously shown that the recombinant N-terminal domain of the lectin BC2L-C from Burkholderia cenocepacia (rBC2LCN) binds exclusively to undifferentiated human induced pluripotent stem (iPS) cells and embryonic stem (ES) cells but not to differentiated somatic cells. Here we demonstrate that podocalyxin, a heavily glycosylated type1 transmembrane protein, is the predominant glycoprotein ligand of rBC2LCN on human iPS cells and ES cells. When analyzed by DNA microarray, podocalyxin was found to be highly expressed in both iPS cells and ES cells. Western and lectin blotting revealed that rBC2LCN binds predominantly to podocalyxin with a high molecular weight of more than 240 kDa in undifferentiated iPS cells of six different origins and four ES cell lines, but no binding was observed in either differentiated mouse feeder cells or somatic cells. The specific binding of rBC2LCN to podocalyxin prepared from a large set of iPS cells (138 types) and ES cells (15 types) was also confirmed using a high-throughput antibody-overlay lectin microarray. Alkaline digestion greatly reduced the binding of rBC2LCN to podocalyxin, indicating that the major glycan ligands of rBC2LCN are presented on O-glycans. Furthermore, rBC2LCN was found to exhibit significant affinity to a branched Oglycan comprising an H type3 structure as the most probable rBC2LCN glycan ligand (Kd, 4.0 x 10-5 M) prepared from human 201B7 iPS cells, suggesting that H type3 is a novel potential pluripotency marker. We conclude that podocalyxin is the predominant glycoprotein ligand of rBC2LCN on human iPS cells and ES cells.