Expression profiling of HeLa cells at S and G2/M phases of mitotic cell cycle.
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE15547 | GEO | 2010/04/01
SECONDARY ACCESSION(S): PRJNA115985
REPOSITORIES: GEO
Similar Datasets
Project description:We compared the mRNAs expression profile of HeLa cells between two phases of the mitotic cell cycle: S and G2/M phases. Results provide insight into the regulation of transcript levels during mitotic cell cycle progression. HeLa cells were synchronized with double thymidine blockade (12 hours with 2 mM thymidine, 12 hours release, and 12 hours with 2 mM thymidine), and cells were taken after 2 hours release (S phase) and 8 hours release (G2/M phase). Keywords: time course Comparison of mRNAs measured at S phase (2 hours release after double thymidine blockade) and at G2/M phase (8 hours release after double thymidine blockade); 3 biological replicates at each of the two time points; two technical replicates with dye swapping per comparison; additional comparison between G2/M (8h) and S (2h).
2010-05-07 | E-GEOD-15547 | biostudies-arrayexpress
Project description:We compared the poly(A) tail length status of mRNAs of HeLa cells between two phases of the mitotic cell cycle: S and G2/M phases. Hundreds of mRNAs were found to be regulated by changes in their poly(A) tail length during mitotic cell cycle in a phase specific manner. Many of these differentially polyadenylated mRNAs encode proteins related to cell death, cell cycle and cellular growth and proliferation. HeLa cells were synchronized with double thymidine blockade (12 hours with 2 mM thymidine, 12 hours release, and 12 hours with 2 mM thymidine), and samples were taken after 2 hours release (S phase) and 8 hours release (G2/M phase). For each condition total RNA was purified by two different procedures: poly(U) chromatography and oligo(dT)-chromatography. Poly(U)-chromatography (Jacobson, 1987): 100 μg of total RNA were bound to poly(U)-sepharose (Sigma) and eluted at 35ºC to isolate mRNAs with short poly(A) tail (<30As, SHORT fraction). Oligo(dT) chromatography: mRNAs were purified independently of their poly(A) tail length with Ambion Poly(A)Purist kit from 20 μg total RNA (ALL fraction). Jacobson, A. Purification and fractionation of poly(A)+ RNA. Methods in Enzymology (1987) 152: 254-261. Keywords: time course
2010-04-01 | GSE15399 | GEO
Project description:We compared the poly(A) tail length status of mRNAs of HeLa cells between two phases of the mitotic cell cycle: S and G2/M phases. Hundreds of mRNAs were found to be regulated by changes in their poly(A) tail length during mitotic cell cycle in a phase specific manner. Many of these differentially polyadenylated mRNAs encode proteins related to cell death, cell cycle and cellular growth and proliferation. HeLa cells were synchronized with double thymidine blockade (12 hours with 2 mM thymidine, 12 hours release, and 12 hours with 2 mM thymidine), and samples were taken after 2 hours release (S phase) and 8 hours release (G2/M phase). For each condition total RNA was purified by two different procedures: poly(U) chromatography and oligo(dT)-chromatography. Poly(U)-chromatography (Jacobson, 1987): 100 μg of total RNA were bound to poly(U)-sepharose (Sigma) and eluted at 35ºC to isolate mRNAs with short poly(A) tail (<30As, SHORT fraction). Oligo(dT) chromatography: mRNAs were purified independently of their poly(A) tail length with Ambion Poly(A)Purist kit from 20 μg total RNA (ALL fraction). Jacobson, A. Purification and fractionation of poly(A)+ RNA. Methods in Enzymology (1987) 152: 254-261. Keywords: time course Comparison of ALL fraction mRNAs and SHORT fraction mRNAs measured after 2 hours (S phase) and 8 hours release (G2/M) from double thymidine blockade; 3 biological replicates at each of the two time points; two technical replicates with dye swapping per comparison.
2010-05-07 | E-GEOD-15399 | biostudies-arrayexpress
Project description:We compared the poly(A) tail length status of mRNAs of HeLa cells expressing a CPEB1 shRNA (CPEB1 knockdown) versus a control shRNA, and expressing a CPEB4 shRNA (CPEB4 knockdown) versus a control shRNA. Results provide insight into the extent of gene regulation mediated by CPEB1 and CPEB4 activity during mitotic cell cycle progression. The different shRNA expressing cells were synchronized with double thymidine blockade (12 hours with 2 mM thymidine, 12 hours release, and 12 hours with 2 mM thymidine), and samples were taken after 8 hours release (G2/M phase). For each shRNA expressing HeLa cell line total RNA was purified by two different procedures: poly(U) chromatography and oligo(dT)-chromatography. Poly(U)-chromatography (Jacobson, 1987): 100 μg of total RNA were bound to poly(U)-sepharose (Sigma) and eluted at 35ºC to isolate mRNAs with short poly(A) tail (<30As, SHORT fraction). Oligo(dT) chromatography: mRNAs were purified independently of their poly(A) tail length with Ambion Poly(A)Purist kit from 20 μg total RNA (ALL fraction). Jacobson, A. Purification and fractionation of poly(A)+ RNA. Methods in Enzymology (1987) 152: 254-261. Keywords: knock-down experiment
2010-04-01 | GSE15549 | GEO
Project description:Periodic expression of cell cycle genes highlights the importance of precise temporal control of transcription in regulating cell cycle events. We used HeLa cells enriched for different phases of the cell cycle to identify genes that are expressed in a periodic fashion in specific cell cycle phases. These data were generated for comparison with ChIP-Sequencing data obtained for two subunits of the B-Myb-MuvB complex, B-Myb and LIN9, in HeLa cells. HeLa cells were synchronized at the beginning of S phase by double thymidine block and then released into the cell cycle by washing out the thymidine resulting in tight synchrony at S, G2 and M phases of the cell cycle. Most cells entered mitosis at 8 hours after release as determined by visual inspection. Three independent replicas of double thymidine block and release experiments were performed. RNA was isolated at specific times after release from the thymidine block (0, 2, 4, 6, 8 and 12 hours) and used for generating expression profiles.
2012-01-25 | E-GEOD-26922 | biostudies-arrayexpress
Project description:Flag-G6PD was expressed in HeLa cells. Then the HeLa cells were synchronized with a double thymidine block procedure. Briefly, the exponentially growing HeLa cells were maintained with 2 mM thymidine for 18 h, followed by a release of 9 h in fresh medium, and then cells were re-cultured in 2 mM thymidine for additional 15 h. These interphase cells were harvested. After a release of 8.5 h in fresh medium, the cells entered into M phase. Mitotic cells were harvested by mitotic shake-off. Then, cell lysate was incubated with anti-Flag M2-agarose. Elutes were separated with 10% SDS-PAGE. The gel was stained with Coomassie Brilliant Blue. Visualized bands were excised and subjected to LC-MS/MS analysis.
2023-05-18 | PXD033829 | Pride
Project description:HeLa cells were synchronized with a double thymidine block procedure. Briefly, the exponentially growing HeLa cells were maintained with 2 mM thymidine for 18 h, followed by a release of 9 h in fresh medium, and then cells were re-cultured in 2 mM thymidine for additional 15 h. After a release of 7.5 h in fresh medium, DMSO or G6PD inhibitor was added to the medium. 1 h later, the cells entered into M phase. Mitotic cells were harvested by mitotic shake-off. Then, the samples were subjected to LC-MS/MS analysis. Finally, a Kinase-Substrate Enrichment was performed, which could infer the changes of upstream kinase activity upon the treatment of G6PD inhibitors.
2023-05-18 | PXD033825 | Pride
Project description:In the associated paper, SERBP1 is shown to form granules in mitotic cells in a PKCɛ-dependent manner (M-bodies). We performed SERBP1 iCLIP in DLD1 cells that were either asynchronous or enriched for mitotic cells and after treatment with 2 hours of 500nM Blu577 or equivalent DMSO. We found that SERBP1 alters its positioning on rRNA in mitosis in a Blu577-dependent manner, identifying an alternative binding position that coincides with the formation of M-bodies. Mitotic enrichment was performed by single thymidine block, release in to G2 block with RO3306, and release and mitotic shake-off. The fastq files provided are demultiplexed, with adapters and barcodes trimmed and UMI sequences are found in the fastq headers.
2021-10-05 | E-MTAB-10830 | biostudies-arrayexpress
Project description:MeRIPSeq of HeLa cells synchronized by a double thymidine block to obtain the cell cycle phases and work with total RNA to study m6A mark in mRNA without polyA tail RNA seq of HeLa cells synchronized by a double thymidine block to obtain the cell cycle phases and work with total RNA to study mRNA without polyA tail
2024-06-27 | GSE236863 | GEO
Project description:We identified the cell cycle-regulated mRNA transcripts genome-wide in the osteosarcoma derived U2OS cell line. This resulted in 2,140 transcripts mapping to 1,871 unique cell cycle-regulated genes that show periodic oscillations across multiple synchronous cell cycles. We identified genomic loci bound by the G2/M transcription factor FOXM1 by Chromatin immunoprecipitation followed by high-throughput sequencing (ChIP-seq) and associated these with cell cycle-regulated genes. FOXM1 was bound to cell cycle-regulated genes with peak expression in both S phase and G2/M phases. ChIP-seq genomic loci were shown to be responsive to FOXM1 using a real-time luciferase assay in live cells, showing that FOXM1 strongly activates promoters of G2/M phase genes and weakly activates those induced in S phase. Analysis of ChIP-seq data from a panel of cell cycle-transcription factors (E2F1, E2F4, E2F6, and GABPA) from ENCODE and ChIP-seq data for the DREAM complex, found that a set of core cell cycle genes regulated in both U2OS and HeLa cells are bound by multiple cell cycle transcription factors. These data identify the cell cycle regulated genes in a second cancer derived cell line and provide a comprehensive picture of the transcriptional regulatory systems controlling periodic gene expression in the human cell division cycle. Cell cycle-regulated gene expression identified from three double thymidine time courses and one thymidine nocodazole time course.
2013-10-11 | E-GEOD-50988 | biostudies-arrayexpress