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HINT2 downregulation promotes colorectal carcinoma migration and metastasis

Weihua Li1, Shaoxin Cai1, Le Wang1

  • 1Department of Surgical Oncology, Fujian Provincial Clinical College, Fujian Medical University, Fuzhou 350001, China.

Oncotarget
|January 16, 2017
PubMed

Insights

Histidine triad nucleotide-binding 2 (HINT2) is downregulated in colorectal cancer (CRC), promoting tumor metastasis. Restoring HINT2 may offer a new strategy for treating aggressive CRC and reducing metastasis risk.

Area of Science:

  • Molecular biology
  • Oncology
  • Biochemistry

Background:

  • Histidine triad nucleotide-binding 2 (HINT2) is a protein involved in apoptosis.
  • Its role in colorectal cancer (CRC) progression and metastasis is not fully understood.

Purpose of the Study:

  • To investigate the role of HINT2 in colorectal cancer (CRC) progression and metastasis.
  • To elucidate the molecular mechanisms underlying HINT2 downregulation in CRC.

Main Methods:

  • Analysis of HINT2 expression in CRC tissues.
  • Demethylation treatment of CRC cells.
  • In vitro and in vivo metastasis assays.
  • Analysis of epithelial-to-mesenchymal transition (EMT) markers.
  • Investigation of the role of hypoxia-inducible factor (HIF)-2α and zinc finger E-box-binding homeobox 1 (ZEB1).

Main Results:

  • HINT2 expression is significantly lower in CRC tissues compared to normal tissues.
  • HINT2 expression inversely correlates with CRC tumor stage.
  • HINT2 downregulation, caused by promoter methylation, enhances CRC cell migration, invasion, and metastasis.
  • HINT2 downregulation promotes EMT via HIF-2α-mediated ZEB1 activation.

Conclusions:

  • HINT2 downregulation promotes CRC metastasis by inducing EMT.
  • HINT2 may serve as a clinical indicator for CRC progression and metastasis risk.
Keywords:
HIF-2αHINT2ZEB1colorectal cancerepithelial–mesenchymal transition

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