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Oncogenic zinc finger protein ZNF322A promotes lung cancer stemness through transcriptionally suppressing c-Myc expression [ChIP-Seq]

ABSTRACT: ZNF322A, a C2H2 zinc finger transcription factor, is an oncoprotein in lung cancer. However, the transcription mechanisms of ZNF322A in lung cancer stemness remain elusive. By integrating our chromatin immunoprecipitation-sequencing and RNA-sequencing datasets, we identified and validated transcriptional targets of ZNF322A, which significantly enriched in developmental processes. Indeed, overexpression of ZNF322A promoted self-renewal ability and increased stemness-related gene expressions in vitro and in vivo. Importantly, ZNF322A bound directly to c-Myc promoter to transcriptionally suppress c-Myc expression, which in turn increased mitochondrial oxidative phosphorylation, promoted cell motility and thus maintained lung cancer stemness properties. Clinically, ZNF322AHigh/c-MycLow expression profile was revealed as an independent factor for poor outcome of lung cancer patients. Our study provides first evidence that ZNF322A-centered transcriptome promotes lung tumorigenesis and ZNF322A acts as a transcription suppressor of c-Myc to maintain lung cancer stemness by shifting metabolism phenotype to oxidative phosphorylation.

ORGANISM(S): Homo sapiens

PROVIDER: GSE94656 | GEO | 2019/09/25

REPOSITORIES: GEO

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Oncogenic zinc finger protein ZNF322A promotes lung cancer stemness through transcriptionally suppressing c-Myc expression [RNA-Seq]

Project description:ZNF322A, a C2H2 zinc finger transcription factor, is an oncoprotein in lung cancer. However, the transcription mechanisms of ZNF322A in lung cancer stemness remain elusive. By integrating our chromatin immunoprecipitation-sequencing and RNA-sequencing datasets, we identified and validated transcriptional targets of ZNF322A, which significantly enriched in developmental processes. Indeed, overexpression of ZNF322A promoted self-renewal ability and increased stemness-related gene expressions in vitro and in vivo. Importantly, ZNF322A bound directly to c-Myc promoter to transcriptionally suppress c-Myc expression, which in turn increased mitochondrial oxidative phosphorylation, promoted cell motility and thus maintained lung cancer stemness properties. Clinically, ZNF322AHigh/c-MycLow expression profile was revealed as an independent factor for poor outcome of lung cancer patients. Our study provides first evidence that ZNF322A-centered transcriptome promotes lung tumorigenesis and ZNF322A acts as a transcription suppressor of c-Myc to maintain lung cancer stemness by shifting metabolism phenotype to oxidative phosphorylation.

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