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Updated: Jul 19, 2026

Isolation and Characterization of a Head and Neck Squamous Cell Carcinoma Subpopulation Having Stem Cell Characteristics
11:28

Isolation and Characterization of a Head and Neck Squamous Cell Carcinoma Subpopulation Having Stem Cell Characteristics

Published on: May 11, 2016

Connexin expression and gap junctional intercellular communication in human squamous cell carcinoma of the head and

Douglas K Frank1, Bozena Szymkowiak, Cynthia A Hughes

  • 1Department of Otolaryngology-Head and Neck Surgery and the Head and Neck Cancer Molecular Biology Research Laboratory, Division of Basic Sciences, New York, New York, USA. dfrank@bethisraelny.org

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|October 31, 2006
PubMed
Abstract

Insights

Connexin 43 expression correlates with gap junction communication in head and neck squamous cell carcinoma. Connexin 26 may act as a tumor suppressor in these cancers.

Area of Science:

  • Oncology
  • Cell Biology
  • Molecular Biology

Background:

  • Gap junction intercellular channels (GJIC) mediate communication between cells.
  • Connexins are proteins that form gap junctions.
  • Understanding connexin roles in cancer is crucial for therapeutic development.

Purpose of the Study:

  • Investigate connexin expression in squamous cell carcinoma of the head and neck (SCCHN).
  • Correlate connexin patterns with GJIC and bystander effects in SCCHN.
  • Determine the role of connexin 43 and 26 in SCCHN.

Main Methods:

  • Assessed GJIC activity in SCCHN cell lines and normal oral epithelial (NOE) cells in vitro.
  • Determined connexin 43 and 26 expression using immunofluorescence.
  • Correlated GJIC activity with connexin expression levels.

Main Results:

  • SCCHN cell lines with retained GJIC expressed connexin 43.
  • Loss of GJIC correlated with absent connexin expression.
  • Connexin 26 was not found in SCCHN cell lines but was present in NOE cells.
  • Introducing connexin 43 did not inhibit growth in deficient SCCHN cells.

Conclusions:

  • Connexin 43 expression is linked to GJIC in SCCHN.
  • Connexin 26 may function as a tumor suppressor in SCCHN.
  • Findings support ongoing research into gap-junction mediated bystander effects in SCCHN.

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