Homo sapiens strain:U87 MG
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1243709 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR32912420_1.fastq.gz | Fastqsanger.gz | |||
| SRR32912420_2.fastq.gz | Fastqsanger.gz | |||
| SRR32912421_1.fastq.gz | Fastqsanger.gz | |||
| SRR32912421_2.fastq.gz | Fastqsanger.gz | |||
| SRR32912422_1.fastq.gz | Fastqsanger.gz |
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Project description:How cancer cells adapt to hypoxia during tumor development remains an important question. The hypothesis tested in the present study was that tumor cell-derived exosome vesicles (also known as microvesicles or extracellular vesicles) are mediators of hypoxia-dependent intercellular signaling in glioblastoma (GBM), i.e. highly aggressive brain tumors characterized by hypoxia and a vascular density that is among the highest of all human malignancies. In vitro hypoxia experiments and studies with patient materials reveal the enrichment in exosomes of hypoxia-regulated mRNAs and proteins, several of which were associated with poor patient prognosis. We show that cancer cell exosomes mediate hypoxia-dependent, phenotypic modulation of stromal cells in vitro and ex vivo, resulting in accelerated GBM tumor angiogenesis and growth in mice. These data suggest that exosomes constitute potent mediators of hypoxia-driven tumor development, and circulating multiparameter biomarkers of tumor hypoxia. U87 MG glioblastoma cells were grown at normoxic (21% oxygen) or hypoxic (1% oxygen) conditions for 48 hours. Conditioned media from normoxic and hypoxic cells were then used to isolate exosomes by differential centrifugation. Both cells and exosomes were lysed in Trizol reagent, and RNA was isolated.Total RNA from all samples (four types of samples in three biological repilicates) was subjected to genome-wide transcriptional analysis with Illumina HumanHT-12 V3.0 expression beadchip. Gene expression profile obtained from hypoxic U87 MG glioblastoma cells was compared to the profile of normoxic control cells. Analogically, gene expression profile obtained from hypoxic U87 MG cells was compared to the profile of exosomes secreted by normoxic U87 MG cells.
2013-03-20 | E-GEOD-45301 | biostudies-arrayexpress
Project description:Total RNA were extracted from Guanylate Cyclase Soluble Subunit Beta-3 (GUCY1B3) overexpression U87 MG stable cell lines and U87 MG cells. Three RNA samples of each of the two cell lines were used for microarray analysis to compare gene expression profile
2016-06-15 | GSE83344 | GEO
Project description:Total RNA were extracted from Guanylate Cyclase Soluble Subunit Beta-3 (GUCY1B3) overexpression U87 MG stable cell lines and U87 MG cells. Three RNA samples of each of the two cell lines were used for microarray analysis to compare gene expression profile Guanylate Cyclase Soluble Subunit Beta-3 (GUCY1B3) was cloned into pCDNA3.1D/V5-His-TOPO plasmid (Invitrgen) and then transfected into U87 MG (ATCC HTB-1) cells to generate stable overexpression cells. RNA from the stable cell lines and U87 MG were used for microarray
2016-06-15 | E-GEOD-83344 | biostudies-arrayexpress
Project description:To examine short- and long-term gene expression responses following high dose radiation exposure in vitro with the U87-MG cell line. Samples were examined at 1, 4, 6 or 35 days after irradiation with 8 or 16Gy.
2017-05-22 | GSE56937 | GEO
Project description:Purpose: Hypoxia is a predominant feature in GBM and its microenvironment. It is associated with the tumor growth, progression and resistance to conventional therapy of GBM. We have utilized U87-MG cell line as a human GBM cell model and human brain HEB cell line as non-neoplastic brain cell cultured in different levels of hypoxia for transcriptional profiling to identify the transcriptional signature of U87-MG cells for elucidated the role of hypoxia in GBM phenotype. Methods: We have utilized U87-MG cell line as a human GBM cell model and human brain HEB cell line as non-neoplastic brain cell cultured in 21%, 5% and 1% O2 for 24h. Then we detected the changes of transcriptional profiling and analyzed the biological process and pathway for the genes with different expression modes in different hypoxia levels. Results: U87-MG cells present specific transcriptional signature response to different hypoxia levels. The genes associated with organ and system development present an upward trend from normoxia to extreme hypoxia. And the biological process of DNA repair presents a downward trend, indicating that gene mutations of U87-MG cells could derive by hypoxia microenvironment. Otherwise, HEB cells present the canonical response to hypoxia, reducing of the metabolic rate in concert with the degree of hypoxia and extracting more oxygen from the environment. Conclusion: Hypoxia microenvironment could promote the malignance of GBM through activate of genes involved in organ and system development. Meanwhile it could induce the mutations of genes in GBM, especially extreme hypoxia.
2020-04-01 | GSE78025 | GEO
Project description:Glioblastoma cells are characterized by a highly invasive behavior whose mechanisms are not yet understood. Using the wound healing and Boyden chamber assays we compared in the present study the migration and invasion abilities of 5 glioblastoma cell lines (DK-MG, GaMG, U87-MG, U373-MG, SNB19) differing in p53 and PTEN status. We also analyzed by Western blotting the expression of PTEN, p53, mTOR and several other marker proteins involved in cell adhesion, migration and invasion. Among 5 cell lines, GaMG cells exhibited the fastest rate of wound closure, whereas U87-MG cells showed the most rapid chemotactic migration in the Boyden chamber assay. In DK-MG and GaMG cells, F-actin mainly occurred in the numerous stress fibers spanning the cytoplasm, whereas U87-MG, U373-MG and SNB19 cells preferentially expressed F-actin in filopodia and lamellipodia. Moreover, the two glioblastoma lines mutated in both p53 and PTEN genes (U373-MG and SNB19) were found to exhibit the fastest invasion rates through the Matrigel matrix. Here, we performed a gene expression profiling of the five glioblastoma cell lines to examine the molecular framework of differences in invasive behavior to find possible targets for chemo- and radiation therapy.
2014-09-05 | E-GEOD-53124 | biostudies-arrayexpress
Project description:After performing an in-vivo screening with U87 glioblastoma cells transduced with a knockdown library several genes could be identified. Lin7a which was one of the candidates was further evaluated. Single knockdown of Lin7a in U87 conferred a pro-invasive phenotype in-vitro and in-vivo. Overexpression of Lin7a in the Primary glioblastoma cell line T269 reduced its invasive phenotype. To decipher the underlying pathways U87 control, U87-shLIN7a and U87-shLin7a+Lin7A (rescue cells after re-expression of Lin7A) were analyzed after in-vitro culture by a transcription profiling Array.
2017-08-27 | E-MTAB-5871 | biostudies-arrayexpress
Project description:Glioblastoma cells are characterized by a highly invasive behavior whose mechanisms are not yet understood. Using the wound healing and Boyden chamber assays we compared in the present study the migration and invasion abilities of 5 glioblastoma cell lines (DK-MG, GaMG, U87-MG, U373-MG, SNB19) differing in p53 and PTEN status. We also analyzed by Western blotting the expression of PTEN, p53, mTOR and several other marker proteins involved in cell adhesion, migration and invasion. Among 5 cell lines, GaMG cells exhibited the fastest rate of wound closure, whereas U87-MG cells showed the most rapid chemotactic migration in the Boyden chamber assay. In DK-MG and GaMG cells, F-actin mainly occurred in the numerous stress fibers spanning the cytoplasm, whereas U87-MG, U373-MG and SNB19 cells preferentially expressed F-actin in filopodia and lamellipodia. Moreover, the two glioblastoma lines mutated in both p53 and PTEN genes (U373-MG and SNB19) were found to exhibit the fastest invasion rates through the Matrigel matrix.
2014-09-05 | GSE53124 | GEO
Project description:Genome wide DNA methylation profiling of control and mTORC2-suppressed glioblastoma cells (U87-EGFRvIII cells). The Illumina Infinium HumanMethylation EPIC BeadChip Array was used to obtain DNA methylation profiles with 865,918 probes in glioblastoma cell line samples. Samples included 2 control U87-MG cells without mTORC2 suppresion, and mTORC2-knockdown U87-MG cells with lentivirus-mediated suppression of mTORC2.
2024-03-20 | GSE235207 | GEO
Project description:Previous studies demonstrated that carnosine affects signaling molecules of different pathways in a number of experimental models. However, the primary targets of carnosine are still unknown and its effect on complex signal transduction has not been revealed. This is especially the case for pathways that could be responsible for the anti-neoplastic effect of the dipeptide. Therefore, we performed a phosphoprotein antibody array and RNA-seq experiments with U87 glioblastoma cells treated with 50 mM carnosine for 24h, in order to obtain a precise and coherent picture of carnosine’s influence on signal transduction in single tumor cells.
2019-11-30 | E-MTAB-6455 | biostudies-arrayexpress