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Salt-inducible kinase 2 functions as a tumor suppressor in hepatocellular carcinoma

Yuan Li1, Jinsong Yu1, Manran Jia1

  • 1Department of General Surgery, Nanyang First People's Hospital Affiliated to Henan University, Nanyang, China.

Environmental Toxicology
|September 7, 2021
PubMed

Insights

Salt-inducible kinase 2 (SIK2) suppresses hepatocellular carcinoma (HCC) progression by inhibiting the Wnt/β-catenin pathway. Low SIK2 expression correlates with poor HCC prognosis, indicating its tumor-suppressive role.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Salt-inducible kinase 2 (SIK2) has a complex role in cancer, but its function in hepatocellular carcinoma (HCC) is unclear.
  • Understanding SIK2's mechanism in HCC is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the role and mechanism of SIK2 in hepatocellular carcinoma (HCC) progression.
  • To determine the relationship between SIK2 expression and HCC patient prognosis.

Main Methods:

  • Analysis of SIK2 expression in HCC tissues from The Cancer Genome Atlas (TCGA) database.
  • Quantitative real-time PCR and western blot to assess SIK2, N-cadherin, E-cadherin, β-catenin, and c-Myc expression in HCC cells.
  • In vitro and in vivo experiments (xenograft model) to evaluate the functional impact of SIK2 modulation on HCC cells.

Main Results:

  • SIK2 was significantly downregulated in HCC tissues and associated with poor patient prognosis.
  • SIK2 overexpression inhibited HCC cell proliferation, invasion, and promoted apoptosis.
  • SIK2 inactivated the Wnt/β-catenin pathway by reducing β-catenin and c-Myc levels, and SIK2 suppressed HCC tumor growth in vivo.

Conclusions:

  • SIK2 acts as a tumor suppressor in HCC.
  • SIK2 exerts its anti-tumor effects by inactivating the Wnt/β-catenin signaling pathway.
Keywords:
SIK2apoptosishepatocellular carcinomainvasionproliferationthe Wnt/β-catenin pathway

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