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A Functional Assay for Gap Junctional Examination; Electroporation of Adherent Cells on Indium-Tin Oxide
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Phosphorylation of connexin43 induced by Src: regulation of gap junctional communication between transformed cells

Madhuri Pahujaa1, Michael Anikin, Gary S Goldberg

  • 1Department of Cell Biology, University of Medicine and Dentistry of New Jersey, Science Center, 2 Medical Center Dr., Stratford, NJ 08084, USA.

Experimental Cell Research
|October 25, 2007
PubMed

Insights

The Src tyrosine kinase disrupts intercellular communication by phosphorylating connexin 43 (Cx43). This review details how Src orchestrates complex Cx43 regulation, impacting cancer progression.

Area of Science:

  • Cellular biology
  • Molecular oncology
  • Biochemistry

Background:

  • Connexin 43 (Cx43) is a key gap junction protein facilitating cell-to-cell communication.
  • Tumor cells often exhibit reduced intercellular communication compared to normal cells.
  • The Src tyrosine kinase is frequently implicated in various cancer progressions.

Purpose of the Study:

  • To review the intricate mechanisms by which Src regulates Cx43 activity.
  • To elucidate how Src influences intercellular communication mediated by Cx43 in cancer.

Main Methods:

  • Literature review of studies investigating Src, Cx43, and intercellular communication.
  • Analysis of signaling pathways downstream of Src, including serine kinases like PKC and MAPK.
  • Examination of Src's effects on Cx43 phosphorylation and expression.

Main Results:

  • Src phosphorylates Cx43, suppressing gap junction communication.
  • Src activates downstream kinases (PKC, MAPK) that also phosphorylate and disrupt Cx43.
  • Src influences the expression of other proteins affecting intercellular communication.
  • Src-mediated disruption of Cx43 is a complex, multi-mechanistic process.

Conclusions:

  • Src employs multiple strategies to regulate Cx43 and intercellular communication.
  • Understanding Src's orchestration of Cx43 is crucial for cancer research.
  • Src's role in modulating Cx43 highlights its significance in cancer progression.

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