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Next Generation Sequencing Facilitates Quantitative Analysis of sevoflurane-treated and sevoflurane-untreated U251 cells Transcriptomes

ABSTRACT: To explore the possible mechanisms of Sev inducing ferroptosis in glioma cells, we performed RNA sequencing to screening differential expressed genes between sevoflurane-treated andsevoflurane-treated U251 cells.

ORGANISM(S): Homo sapiens

PROVIDER: GSE193295 | GEO | 2022/01/11

REPOSITORIES: GEO

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Next Generation Sequencing Facilitates Quantitative Analysis of sevoflurane-treated and sevoflurane-untreated U251 cells Transcriptomes

Project description:Next Generation Sequencing Facilitates Quantitative Analysis of sevoflurane-treated and sevoflurane-untreated U251 cells Transcriptomes

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Project description:The objective of the study was to examine the gene expression changes in glioma cell line U87 and U251 with LAMP2A knockdown. There were 15 samples in total- U87-1, U87-2, U87-3, U87-1812-1, U87-1812-2, U87-1812-3, U251-1, U251-2, U251-3, U251-1812-1, U251-1812-2, U251-1812-3, U251-1813-1, U251-1813-2, and U251-1813-3. U87-1 to U87-3 and U251--1 to U251-3 were used as the control groups (CON). U87-1812-1 to U871812-3, U251-1812-1 to U251-1812-3, and U251-1813-1 to U251-1813-3 were used as the experimental groups (shLAMP2A-1 and shLAMP2A-2). The total RNA of each sample was extracted from the stable transfected glioma cells by using TRIzol reagent. Then the RNA samples were processed for high throughput transcriptome sequencing on Illumina HiSeq 3000 platform. There were two types of libraries: the circRNA, mRNA, and lncRNA were all constructed by removing rRNA (one library, three types of RNA were analyzed together), and the insert fragment was about 300bp; the small RNA was constructed and analyzed separately, mainly microRNA of about 22bp. Results: among 60612 cleaned mRNAs, 781 were differentially expressed in U87-1812 group compared with U87 group, 146 were differentially expressed in U251-1812 group compared with U251 group, 43 were differentially expressed in U251-1813 group compared with U251 group (padj ≤ 0.05 and expression change ≥2 fold). The differential expressed genes distributed in all chromosomes. Functional annotation with GO and KEGG enrichment revealed the top functional groups including inflammation, DNA replication, cell adhesion, TNF, IL17, and axon guidance signaling pathways.

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Expression data from PARK2 overexpression in U251 cells

Project description:PARK2 (PARKIN) is an E3 ubiquitin ligase whose dysfunction has been associated with the progression of Parkinsonism and human malignancies, and its role in cancer remains to be explored. In this study, we investigated its role in glioma. We used microarrays to detail the global programme of gene expression upon PARK2 overexpression in U251 cells U251 cells with PARK2 overexpression or control (GFP) were subjected for RNA extraction and hybridization on Affymetrix microarrays.

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sevoflurane exposures on neonatal and adult mice,LC-MSMS

Project description:Sevoflurane is the most commonly used general anesthetic in pediatric surgery, but it has the potential to be neurotoxic. Previous research found that long-term or multiple sevoflurane exposures could cause cognitive deficits in newborn mice but not adult mice, whereas short-term or single inhalations had little effect on cognitive function at both ages. The mechanisms behind these effects, however, are unclear. In the current study, 6- and 60-day-old C57bl mice in the sevoflurane groups were given 3% sevoflurane plus 60% oxygen for three consecutive days, each lasting 2 hours, while those in the control group only got 60% oxygen. The cortex tissues were harvested on the 8th or 62nd day. The tandem mass tags (TMT)pro-based quantitative proteomics combined with liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysi were applied to analyze the influences of multiple sevoflurane anesthesia on the cerebral cortex in mice with various ages. A total of 6247 proteins were measured using the combined quantitative proteomics methods of TMTpro-labeled and LC-MS/MS, 443 of which were associated to the age-dependent neurotoxic mechanism of repeated sevoflurane anesthesia. Our findings would help to further the mechanistic study of age-dependent anesthetic neurotoxicity and contribute to seek for effective protection in the developing brain under general anesthesia.

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Expression data from PARK2 overexpression in U251 cells

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Project description:Cyclophosphamide (CPA) treatment on a six-day repeating metronomic schedule induces a dramatic, innate immune cell-dependent regression of implanted gliomas. However, little is known about the underlying mechanisms of innate immune cell mobilization and recruitment, or about the role of DNA damage and cell stress response pathways in eliciting the anti-tumor immune responses linked to tumor regression. To address these questions, we compared untreated and 6-day metronomic cyclophosphamide-treated human U251 glioblastoma xenografts by human microarray analysis to identify responsive tumor cell-specific factors. Human glioma U251 tumors were implanted sc in scid immunodeficient mice then treated with cyclophosphamide at 140 mg/kg every 6 days. Tumors were collected 6 days after the second cyclophosphamide treatment and also 6 days after the third cyclophosphamide treatment. Tumor RNA was then analyzed on two color Agilent human expression microarrays comparing cyclophosphamide-treated RNA to untreated control tumor RNA.

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