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Human HEK 293T cells transfected with pEGFP-survivin gene

ABSTRACT: Transcriptional profiling of human embryonic kidney 293 cells comparing transfected control pEGFP-C1 (empty vector) with pEGFP (survivin vector).

ORGANISM(S): Homo sapiens

PROVIDER: GSE43817 | GEO | 2014/10/21

SECONDARY ACCESSION(S): PRJNA187495

REPOSITORIES: GEO

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Human HEK 293T cells transfected with pEGFP-survivin gene

Project description:Transcriptional profiling of human embryonic kidney 293 cells comparing transfected control pEGFP-C1 (empty vector) with pEGFP (survivin vector). One condition experiment; survivin transfected cell as test sample vs empty vector transfected cell as reference; one dye swap replicate

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Project description:HEK 293 cells were transiently transfected with plasmids expressing Vector only(PCMV), Aire, or MBD-VP16 with the goal of comparing the global gene expression profiles in the Aire and MBD-VP16 groups We used microarrays to detail the global gene expression profile. HEK 293 cells were transiently transfected with plasmids expressing Vector only(PCMV), Aire, or MBD-VP16 and 72 hrs post transfection total RNA was collected for microarray analysis.

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RNA-seq of 32D clone 3 cells transfected with CXCR2 (pEGFP-N1-CXCR2) or an empty vector (pEGFP-N1) with CXCL1/2 treatment

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Survivin ChIPseq

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Survivin deficient liver of mice after partial hepatectomy

Project description:The liver possesses remarkable regenerative capacity in response to injury. Upon partial hepatectomy (PHx), terminally differentiated hepatocytes in the remaining liver enter the cell cycle and restore the liver mass and function within weeks. However, liver regeneration is often impaired in livers with chronic diseases. Survivin, an inhibitor of apoptosis protein (IAP) and member of chromosome passenger complex (CPC), plays versatile roles in cell mitosis and apoptosis. We and others found that the expression of Survivin was highly increased in liver during PHx-induced liver regeneration, which indicated that Survivin played important roles in this process. However, the function of Survivin in liver regeneration remains largely undefined. Here, using mice with genetic deletion of Survivin, we found that during PHx-induced liver regeneration Survivin regulated both hepatocyte G1/S phase transition by inhibiting the expression of p21 and G2/M phase transition by regulating the localization of CPC. Moreover, restoration of Survivin expression in Survivin-deficient hepatocytes inhibited p21 expression and promote both hepatocyte G1/S and G2/M transition during PHx-induced liver regeneration.

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Project description:BackgroundThe human orphan receptor TLX (NR2E1) is a key regulator of neurogenesis, adult stem cell maintenance, and tumorigenesis. However, little is known about the genetic and transcriptomic events that occur following TLX overexpression in human cell lines.AimsHere, we used cytogenetics and RNA sequencing to investigate the effect of TLX overexpression with an inducible vector system in the HEK 293T cell line.Methods and resultsConventional spectral karyotyping was used to identify chromosomal abnormalities, followed by fluorescence in situ hybridization (FISH) analysis on chromosome spreads to assess TLX DNA copy number. Illumina paired-end whole transcriptome sequencing was then performed to characterize recurrent genetic variants (single nucleotide polymorphisms (SNPs) and indels), expressed gene fusions, and gene expression profiles. Lastly, flow cytometry was used to analyze cell cycle distribution. Intriguingly, we show that upon transfection with a vector containing the human TLX gene (eGFP-hTLX), an isochromosome forms on the long arm of chromosome 6, thereby resulting in DNA gain of the TLX locus (6q21) and upregulation of TLX. Induction of the eGFP-hTLX vector further increased TLX expression levels, leading to G0-G1 cell cycle arrest, genetic aberrations, modulation of gene expression patterns, and crosstalk with other nuclear receptors (AR, ESR1, ESR2, NR1H4, and NR3C2). We identified a 49-gene signature associated with central nervous system (CNS) development and carcinogenesis, in addition to potentially cancer-driving gene fusions (LARP1-CNOT8 and NSL1-ZDBF2) and deleterious genetic variants (frameshift insertions in the CTSH, DBF4, POSTN, and WDR78 genes).ConclusionTaken together, these findings illustrate that TLX may play a pivotal role in tumorigenesis via genomic instability and perturbation of cancer-related processes.

| S-EPMC7941458 | biostudies-literature

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