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CAMK2N1 has a cancer-suppressive function in colorectal carcinoma via effects on the Wnt/β-catenin pathway

Xiaolong Zhang1, Lifei Tian1, Zeyu Li1

  • 1Department of General Surgery, Shaanxi Provincial People's Hospital, Xi'an, 710068, China.

Biochemical and Biophysical Research Communications
|August 23, 2022
PubMed

Insights

Calcium/calmodulin-dependent protein kinase II inhibitor 1 (CAMK2N1) acts as a tumor suppressor in colorectal cancer. Lower CAMK2N1 levels correlate with poor patient survival and promote cancer progression by activating the Wnt/β-catenin pathway.

Area of Science:

  • Oncology
  • Molecular Biology

Background:

  • Deregulation of calcium/calmodulin-dependent protein kinase II inhibitor 1 (CAMK2N1) is implicated in various cancers.
  • Limited research exists on CAMK2N1's role in colorectal carcinoma progression.

Purpose of the Study:

  • To investigate the relationship between CAMK2N1 expression and colorectal carcinoma progression.
  • To elucidate the underlying molecular mechanisms of CAMK2N1's function in colorectal cancer.

Main Methods:

  • Analysis of CAMK2N1 levels in colorectal carcinoma tissues and correlation with patient survival.
  • In vitro studies using colorectal carcinoma cell lines with CAMK2N1 overexpression and silencing.
  • Investigation of CAMK2N1's effect on Wnt/β-catenin pathway components.
  • In vivo tumorigenicity assays in nude mice.

Main Results:

  • CAMK2N1 levels were significantly decreased in colorectal carcinoma tissues, correlating with poorer overall survival.
  • CAMK2N1 overexpression suppressed proliferation, cell cycle progression, metastasis, and chemoresistance.
  • CAMK2N1 silencing led to opposite effects, enhancing cancer phenotypes.
  • CAMK2N1 negatively regulated the Wnt/β-catenin pathway by reducing levels of key signaling molecules.
  • CAMK2N1-mediated tumor inhibition was dependent on Wnt/β-catenin pathway suppression.
  • Tumorigenicity of CAMK2N1-overexpressing cells was significantly reduced in vivo.

Conclusions:

  • CAMK2N1 exhibits a tumor-suppressive function in colorectal carcinoma.
  • CAMK2N1 inhibits colorectal cancer progression primarily through the suppression of the Wnt/β-catenin signaling pathway.
Keywords:
CAMK2N1Colorectal carcinomaWntβ-catenin

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