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CPSF4 regulates circRNA formation and microRNA mediated gene silencing in hepatocellular carcinoma

Xueying Wang1, Jiani Dong1, Xiaojing Li2

  • 1Xiangya School of Pharmaceutical Sciences in Central South University, Changsha, China.

Oncogene
|June 9, 2021
PubMed

Insights

CPSF4 is upregulated in hepatocellular carcinoma (HCC), promoting cancer growth by reducing circular RNAs (circRNAs). This disruption inhibits microRNA (miRNA) silencing, worsening patient prognosis in HCC.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Genomics

Background:

  • Circular RNAs (circRNAs) are crucial in physiological processes and implicated in cancer.
  • Hepatocellular carcinoma (HCC) often shows global circRNA downregulation.
  • The pre-mRNA 3' end processing complex influences circRNA formation and HCC tumorigenesis.

Purpose of the Study:

  • To investigate the role of CPSF4 in circRNA formation within the context of HCC.
  • To elucidate the mechanism by which CPSF4 affects circRNA levels and HCC progression.

Main Methods:

  • Clinical data analysis of CPSF4 expression in HCC patients.
  • Mechanistic studies on CPSF4's impact on circRNA with polyadenylation signals.
  • Cell culture and xenograft mouse models to assess HCC cell proliferation and tumorigenicity.

Main Results:

  • CPSF4 expression is elevated in HCC, correlating with poor prognosis.
  • CPSF4 decreases circRNA levels, leading to reduced miRNA accumulation and impaired miRNA-mediated gene silencing.
  • CPSF4 promotes HCC cell proliferation and tumorigenicity, counteracting tumor suppressor circRNAs.

Conclusions:

  • CPSF4 functions as an oncogene in HCC.
  • CPSF4 drives HCC progression by inhibiting circRNA biogenesis and disrupting miRNA-mediated gene silencing.

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