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Context-dependent function of long noncoding RNA PURPL in transcriptome regulation during p53 activation (Iso-Seq)

ABSTRACT: The goal of our study is to investigate the role of the p53-induced lncRNA PURPL in the context of liver cancer. To achieve this, we identified transcript variants of PURPL expressed in liver cancer cells and assayed for the transcriptome changes caused by PURPL knockdown after p53 induction.

ORGANISM(S): Homo sapiens

PROVIDER: GSE206701 | GEO | 2022/10/18

REPOSITORIES: GEO

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Context-dependent function of long noncoding RNA PURPL in transcriptome regulation during p53 activation (RNA-Seq I)

Project description:The goal of our study is to investigate the role of the p53-induced lncRNA PURPL in the context of liver cancer. To achieve this, we identified transcript variants of PURPL expressed in liver cancer cells and assayed for the transcriptome changes caused by PURPL knockdown after p53 induction.

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Context-dependent function of long noncoding RNA PURPL in transcriptome regulation during p53 activation (RNA-Seq II)

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Context-dependent function of long noncoding RNA PURPL in transcriptome regulation during p53 activation (Iso-Seq)

Project description:Context-dependent function of long noncoding RNA PURPL in transcriptome regulation during p53 activation (Iso-Seq)

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Identification of PURPL regulated genes in HCT116 cells

Project description:Analysis of changes in gene expression profile upon depletion of PURPL in HCT116 cells. The hypothesis in this study is that PURPL regulates gene expression in the p53 pathway.

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Context-dependent function of long noncoding RNA PURPL in transcriptome regulation during p53 activation

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Context-dependent function of long noncoding RNA PURPL in transcriptome regulation during p53 activation (RNA-Seq I)

Project description:Context-dependent function of long noncoding RNA PURPL in transcriptome regulation during p53 activation (RNA-Seq I)

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Mass spectrometry (MS) datasets of PURPL RNA pulldown samples in A375 cells

Project description:We performed PURPL RNA pulldown followed by MS analysis to identify purpl-interacting proteins in A375 cells.With high performance liquid chromatography-mass spectrometry (HPLC-MS), the binding protein of PURPL from RNA pull down was detected by removing non-specific protein which were binding with EGFP.

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PURPL Represses Radiation-induced Apoptosis to Promote Radioresistance in Cutaneous Melanoma by Direct Interfering with BID Cleavage

Project description:During the treatment of cutaneous melanoma, the presence of radioresistance compromised the therapeutic effects of radiotherapy. Yet, the mechanism of radioresistance in melanoma still remains unclear. Bioinformatic analysis of the transcriptomic sequencing showed PURPL was top up-regulated genes in response to ionizing radiation (IR) treatment in melanoma cells. Loss of PURPL notably repressed melanoma cell viability, colony formation, migration and invasiveness which potentiated PURPL’s role in radioresistance of melanoma. Further, loss-of- and gain-of-function analysis indicated that PURPL repressed IR-induced DNA damage and apoptosis. Mechanistically, RNA pulldown was performed and BID was identified as the interacting protein partner of PURPL. As the core gene of the mitochondrial apoptosis pathway, BID could be cleaved by Caspase-8 to generate tBID, which promotes the permeability of the mitochondrial membrane and the release of cytochrome c. IR treatment promotes the interaction between BID and Caspase-8 which was further strengthened by the loss of PURPL. The in vivo assays further verified the in vitro findings. Collectively, our study supports the pro-radioresistance role of PURPL in melanoma by inhibiting the interaction between BID and Caspase-8, which may provide a novel target for clinical radiotherapy.

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Context-dependent function of long noncoding RNA PURPL in transcriptome regulation during p53 activation

Project description:This SuperSeries is composed of the SubSeries listed below.

2022-10-18 | GSE206702 | GEO