The effect of Ras on the signalling networks in senescence
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
SUBMITTER: Parmjit Jat
PROVIDER: E-GEOD-979 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:HMF3A cells, created from adult human mammary fibroblasts by immortalisation with a thermolabile SV40 large T antigen and the catalytic sub-unit of human telomerase, undergo co-ordinated induction of cellular senescence upon inactivation of T antigen. HMF3A cells cease proliferating by 4 days at 39°C. We directly compared the gene expression profiles of cells at 33.5°C and after shift up to 39.5°C for 7 days (10 arrays, 3 biological replicates). To eliminate genes that change in response to the temperature shift, we compared the profiles of HMF3Dwt cells at 33°C and those shifted up to 39°C for 7 days (4 arrays, 2 biological replicates). Since HMF3Dwt cells were immortalised with wild type U19 LT antigen, they proliferate at both temperatures. To break up the list of genes obtained with the 7 day shift, we performed several further comparisons on the arrays. HMF3A cells at 33°C were compared to the primary donor fibroblasts (HMF3 passage 8, 4 arrays), HMF3A cells shifted to 39°C for 2 days (4 arrays, 2 biological repeats), HMF3A cells shifted to 39°C for 7 days and then shifted back to 33°C for 3 days (8 arrays, 4 biological repeats) or 7 days (4 arrays, 2 biological repeats). As a comparison to the irreversible process of senescence, we sought to identify genes that changed upon reversible growth arrest, quiescence. Thus changes that occurred when the cells were grown to confluency and starved were also determined (2 biological replicate, 6 arrays). Keywords = Rb Keywords = fibroblast Keywords = immortalization Keywords = LT antigen Keywords = p53 Keywords = quiescence Keywords = senescence
2010-06-09 | E-GEOD-688 | biostudies-arrayexpress
Project description:Activated Ha-ras was introduced to HMF3A cells. HMF3A cells are conditionally immortalised human mammary fibroblasts. They undergo co-ordinated senescence upon inactivation of LT antigen, when cultured at 39C. The introduction of Ras did not prevent this but affected the molecular profile. Keywords = Senescence Keywords = fibroblast Keywords = Ras Keywords = immortalization Keywords = transformation Keywords: ordered
2004-05-04 | GSE979 | GEO
Project description:HMF3A cells, created from adult human mammary fibroblasts by immortalisation with a thermolabile SV40 large T antigen and the catalytic sub-unit of human telomerase, undergo co-ordinated induction of cellular senescence upon inactivation of T antigen. The pSUPER-retro vector system (Brummelkamp, 2002) was used to selectively target genes for mRNA degradation in an attempt to determine if they had a role, in the changes to the transcriptome upon LT inactivation. The genes chosen for targeting were BTG2, NR4A3, DUSP1, PHLDA1 and STACb. Keywords = LT antigen Keywords = senescence Keywords = fibroblast Keywords = BTG2 Keywords = DUSP1 Keywords = MKP-1 Keywords = NR4A3 Keywords = STAC Keywords = PHLDA1 Keywords = RNAi
2010-06-09 | E-GEOD-690 | biostudies-arrayexpress
Project description:HMF3A cells, created from adult human mammary fibroblasts by immortalisation with a thermolabile SV40 large T antigen and the catalytic sub-unit of human telomerase, undergo co-ordinated induction of cellular senescence upon inactivation of T antigen. Given the importance of p53, we sought to determine what gene changes were affected if its activation was inhibited. To do this we used the Genetic Suppressor Element (GSE)56 which inhibits the transcriptional activity of p53 (Ossovskaya, 1996). The presence of the GSEp53 delayed the arrest of the HMF3A cells when LT was inactivated. However the cells did arrest. We thus examined the array profiles for 3A-GSEp53 cells after 2 and 7 days of LT inactivation (against 3A-GSEp53 cells at 33°C) and compared these to the profiles for 3A-puro cells. Keywords = p53 Keywords = LT antigen Keywords = fibroblast Keywords = senescence Keywords = Rb
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Project description:To determine changes in gene expression in primary fibroblasts undergoing replicative senescence, a direct comparison between early passage proliferating cells and senescent cells was performed. Frozen stocks of the primary fibroblasts (HMF3) from which the lines HMF3A and HMF3Dwt were derived (O'Hare, PNAS:98, 2001) were serially passaged twice through to senescence to yield 2 independent sets of RNA. A third set of RNA was from a different female donor (F1068). The three different sets of RNA were put on 4 arrays each. Data is also provided for F1068 fibroblasts at late passage. Keywords = fibroblast Keywords = senescence Keywords = breast
2010-06-09 | E-GEOD-687 | biostudies-arrayexpress
Project description:Immortalised lines created from different cell types from the human breast were induced to undergo senesecence by inactivation of the immortalising LT antigen.
2010-06-10 | E-GEOD-2427 | biostudies-arrayexpress
Project description:HMF3A cells, created from adult human mammary fibroblasts by immortalisation with a thermolabile SV40 large T antigen and the catalytic sub-unit of human telomerase, undergo co-ordinated induction of cellular senescence upon inactivation of T antigen. HMF3A cells cease proliferating by 4 days at 39°C. We directly compared the gene expression profiles of cells at 33.5°C and after shift up to 39.5°C for 7 days (10 arrays, 3 biological replicates). To eliminate genes that change in response to the temperature shift, we compared the profiles of HMF3Dwt cells at 33°C and those shifted up to 39°C for 7 days (4 arrays, 2 biological replicates). Since HMF3Dwt cells were immortalised with wild type U19 LT antigen, they proliferate at both temperatures. To break up the list of genes obtained with the 7 day shift, we performed several further comparisons on the arrays. HMF3A cells at 33°C were compared to the primary donor fibroblasts (HMF3 passage 8, 4 arrays), HMF3A cells shifted to 39°C for 2 days (4 arrays, 2 biological repeats), HMF3A cells shifted to 39°C for 7 days and then shifted back to 33°C for 3 days (8 arrays, 4 biological repeats) or 7 days (4 arrays, 2 biological repeats). As a comparison to the irreversible process of senescence, we sought to identify genes that changed upon reversible growth arrest, quiescence. Thus changes that occurred when the cells were grown to confluency and starved were also determined (2 biological replicate, 6 arrays). Keywords = Rb Keywords = fibroblast Keywords = immortalization Keywords = LT antigen Keywords = p53 Keywords = quiescence Keywords = senescence Keywords: ordered
2004-03-01 | GSE688 | GEO
Project description:RIE (rat intestinal epithelial) cells treated with 2 ng/ml of TGF-beta-1 for 1 hr were compared to control cells. The experiment was performed under identical conditions four times: RIE vs RIE - TGF-beta #1-#4. RIE-Ras cells were established by stable transfection of the parental cells with pSV2-H-Ras(12V) which contain human sequences encoding the constitutively active H-Ras(12V) protein. RIE-Ras cells treated with 2 ng/ml of TGF-beta-1 for 1 hr were compared to control cells. The experiment was performed four times under identical conditions (RIE-Ras vs RIE-RAS TGF-beta #1-#4).
2008-06-11 | E-GEOD-2015 | biostudies-arrayexpress
Project description:HMF3A cells, created from adult human mammary fibroblasts by immortalisation with a thermolabile SV40 large T antigen and the catalytic sub-unit of human telomerase, undergo co-ordinated induction of cellular senescence upon inactivation of T antigen. Given the importance of p53, we sought to determine what gene changes were affected if its activation was inhibited. To do this we used the Genetic Suppressor Element (GSE)56 which inhibits the transcriptional activity of p53 (Ossovskaya, 1996). The presence of the GSEp53 delayed the arrest of the HMF3A cells when LT was inactivated. However the cells did arrest. We thus examined the array profiles for 3A-GSEp53 cells after 2 and 7 days of LT inactivation (against 3A-GSEp53 cells at 33°C) and compared these to the profiles for 3A-puro cells. Keywords = p53 Keywords = LT antigen Keywords = fibroblast Keywords = senescence Keywords = Rb Keywords: other
2004-03-01 | GSE689 | GEO
Project description:HMF3A cells, created from adult human mammary fibroblasts by immortalisation with a thermolabile SV40 large T antigen and the catalytic sub-unit of human telomerase, undergo co-ordinated induction of cellular senescence upon inactivation of T antigen. The pSUPER-retro vector system (Brummelkamp, 2002) was used to selectively target genes for mRNA degradation in an attempt to determine if they had a role, in the changes to the transcriptome upon LT inactivation. The genes chosen for targeting were BTG2, NR4A3, DUSP1, PHLDA1 and STACb. Keywords = LT antigen Keywords = senescence Keywords = fibroblast Keywords = BTG2 Keywords = DUSP1 Keywords = MKP-1 Keywords = NR4A3 Keywords = STAC Keywords = PHLDA1 Keywords = RNAi Keywords: other
2004-03-01 | GSE690 | GEO