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Gap junction as an intercellular glue: Emerging roles in cancer EMT and metastasis

Xiao-Yuan Mao1, Qiu-Qi Li1, Yuan-Feng Gao1

  • 1Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha 410008, China; Institute of Clinical Pharmacology, Hunan Key Laboratory of Pharmacogenetics, Central South University, Changsha 410078, China.

Cancer Letters
|August 5, 2016
PubMed

Insights

Gap junctions (GJs) act as intercellular glue, suppressing epithelial-to-mesenchymal transition (EMT) and blocking cancer metastasis. Understanding these mechanisms can lead to novel cancer therapies.

Area of Science:

  • Oncology
  • Cell Biology
  • Cancer Metastasis Research

Background:

  • Metastasis is responsible for 90% of cancer mortality, yet the molecular drivers of aggressive phenotypes remain unclear.
  • Tumor microenvironment (TME) components significantly influence cancer cell evolution and metastatic potential.
  • Intercellular communication via gap junctions (GJs) is implicated in cancer progression.

Purpose of the Study:

  • To investigate the role of gap junctions (GJs) in suppressing epithelial-to-mesenchymal transition (EMT) and cancer metastasis.
  • To elucidate the molecular mechanisms by which GJs regulate cancer cell evasion and aggressive phenotypes.

Main Methods:

  • Analysis of intercellular communication pathways in cancer models.
  • Investigating the correlation between GJ coupling and metastatic potential in various cancer types.
  • Examining the impact of GJs on cell adhesion and migration, key features of EMT.

Main Results:

  • Increased GJ coupling was observed to inhibit metastatic potential in preclinical cancer models, including breast cancer and melanoma.
  • Evidence suggests GJs contribute to cell adhesion and migration, processes central to EMT.
  • GJ function appears critical in modulating the aggressive phenotype of cancer cells.

Conclusions:

  • Gap junctions (GJs) function as an 'intercellular glue' that suppresses EMT and consequently inhibits cancer metastasis.
  • Targeting GJ-mediated communication presents a promising therapeutic strategy for combating metastatic cancer.
Keywords:
Cancer metastasisConnexinEpithelial–mesenchymal transitionGap junctionTumor microenvironment

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