Homo sapiens
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PROVIDER: PRJNA128461 | ENA |
REPOSITORIES: ENA
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Project description:Microarray was used to study global gene expression of a cell culture model based on SV40-immortalized human corneal epithelial (iHCE) cells. The gene expression profile of the cell line was compared to the normal human corneal epithelium. Affymetrix HG-U133A GeneChips® were used for microarray experiments and results were validated by performing RT-qPCR for selected genes. iHCE was found to over- and under-express 22 % and 14 % of the annotated genes, respectively. The results of this study suggest that differences between iHCE cells and normal corneal epithelium are substantial and therefore the use of these cells in corneal research should be considered with caution. SV40-immortalized human corneal epithelial (iHCE) cells were cultured on collagen coated permeable supports for one week using standard culture conditions. Subsequently the apical medium was removed and culturing was continued at the air-liquid interface which allows cells to stratify. Trans-epithelial electrical resistance was followed and total RNA was extracted from cultures with resistance > 300 Ω x cm2. RNA was amplified, labeled with biotin, fragmented and hybridized to the HG-U133A GeneChips® (Affymetrix) according to the protocol of the manufacturer. Three separate experiments with samples from three independent culture batches (iHCE1, iHCE2, iHCE3) were performed. The Global gene expression profile of iHCE was compared to previously published human corneal epithelial tissue (GSE5543) data.
2010-07-29 | E-GEOD-22539 | biostudies-arrayexpress
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.
2010-09-25 | GSE24338 | GEO
Project description:Microarray was used to study global gene expression of a cell culture model based on SV40-immortalized human corneal epithelial (iHCE) cells. The gene expression profile of the cell line was compared to the normal human corneal epithelium. Affymetrix HG-U133A GeneChips® were used for microarray experiments and results were validated by performing RT-qPCR for selected genes. iHCE was found to over- and under-express 22 % and 14 % of the annotated genes, respectively. The results of this study suggest that differences between iHCE cells and normal corneal epithelium are substantial and therefore the use of these cells in corneal research should be considered with caution.
2010-06-24 | GSE22539 | GEO
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. One-condition experment, gene expression of 3A6
2010-09-25 | E-GEOD-24338 | biostudies-arrayexpress
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.
2011-08-25 | GSE23936 | GEO
Project description:Purpose. Simian virus 40 (SV40)-immortalized human corneal epithelial (HCE-T) cells have been widely used as an in vitro model of human corneal epithelial cells. To better understand the nature of this cell line, we assessed it for genomic aberrations and cellular heterogeneity. Methods. For the quantitative measurement of genomic aberrations, array based comparative genomic hybridization (CGH) analysis was performed. For identification of cellular heterogeneity, cell morphology, growth kinetics, trans-epithelial electrical resistance and transcriptional efficiency were analyzed. We also carried out real-time PCR and chromosomal fluorescent in situ hybridization (cFISH) against some gained or lost loci in order to assess genomic heterogeneity. To assess differences in the gene expression profiles between HCE-T cells and normal corneal epithelial cells, we collected expressed sequence tags (ESTs) for this cell line. Southern blotting and inverse PCR analyses were used to determine the genomic integration site of the SV40 large T antigen gene (LTAG). Results. Array CGH analysis indicated that the genomic content of HCE-T cells is different from the normal healthy genome. Our results from cellular functional assays, real-time PCR and cFISH strongly showed that HCE-T cells consist of a not insignificant number of heterogeneous cell populations. The genomic integration site of the SV40 large T antigen was at p22.1 of chromosome 9. Conclusions. Our results indicate that HCE-T cells have an altered genomic content and that they are composed of heterogeneous cell populations. This should be considered when conducting experiments or interpreting the results of studies which use this cell line. Keywords: comparative genomic hybridization Genomic DNAs from HCE-T cells, immortalized cell line of human corneal epithelial cells and normal female duploid cells were subjected to array CGH analysis to identify genomic alterations in the HCE-T cells. These DNAs were labeled with Cy5 and Cy3, respectively.
2008-04-15 | E-GEOD-11101 | biostudies-arrayexpress
Project description:Genome-wide analysis of dihydrotestosterone (DHT) induced changes in gene expression in primary and immortalized human corneal epithelial cells. Analysis of regulation of primary and immortalized human corneal epithelial cells by dihydrotestosterone at gene expression level. The hypothesis tested in the present study was that the androgen-eye interaction in ocular surface epithelial cells like corneal cells is influenced by androgens through regulation of the expression of multiple genes. Results provide important information of the differential regulation and comparitive analysis of numerous genes in response to dihydrotestosterone incubation in primary and immortalized human corneal epithelial cells. Total RNA was obtained from primary and immortalized human corneal epithelial cells treated for 5 days with 10 nM dihydrotestosterone (n=3) or vehicle (n=3). The RNA was then used with Illumina HumanHT-12 v3 Expression BeadChips to determine the effect of DHT on gene expression in the primary human corneal cells grown in our laboratory and the immortalized human corneal epithelial cell line developed in Dr. Rheinwald's laboratory [Rheinwald et al. MCB, 22 (14): 5157. (2002)] and charecterized in Dr. Ilene Gibson's laboratory [Gipson et al. IOVS, 44 (6): 2496. (2003)].
2011-03-31 | E-GEOD-18093 | biostudies-arrayexpress
Project description:Dihydrotestosterone induced changes in gene expression in primary and immortalized human corneal epithelial cells
| PRJNA119381 | ENA
Project description:Genome-wide analysis of dihydrotestosterone (DHT) induced changes in gene expression in primary and immortalized human corneal epithelial cells. Analysis of regulation of primary and immortalized human corneal epithelial cells by dihydrotestosterone at gene expression level. The hypothesis tested in the present study was that the androgen-eye interaction in ocular surface epithelial cells like corneal cells is influenced by androgens through regulation of the expression of multiple genes. Results provide important information of the differential regulation and comparitive analysis of numerous genes in response to dihydrotestosterone incubation in primary and immortalized human corneal epithelial cells.
2011-03-31 | GSE18093 | GEO
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. Two-condition experiment, KP MSCs vs. 3A6 MSCs.
2011-08-24 | E-GEOD-23936 | biostudies-arrayexpress