Involvement of gap junctions in tumorigenesis: Transfection of tumor cells with connexin 32 cDNA retards growth in vivo

B. Eghbali, J. A. Kessler, L. M. Reid, C. Roy, D. C. Spray

Research output: Contribution to journalArticle

216 Scopus citations

Abstract

Gap junction channels provide a pathway for exchange of ions and small molecules between coupled cells, and this exchange is believed to be critical for normal tissue growth and development. As a test for a role of gap junction-mediated intercellular communication in control of cell growth, we have compared growth rates of communication-deficient human tu-mor cells (SKHep1) with clones stably transfected with cDNA encoding the rat liver gap junction protein connexin 32. In culture, growth rates for parental and transfected clones were similar. However, when sizes of tumors were evaluated following injection of these clones into athymic nude mice, growth rates for two well-coupled clones were significantly lower than for communication-deficient or poorly coupled clones. This study demonstrates that growth rate of these tumor cells in situ is negatively correlated with strength of intercellular communication.

Original languageEnglish (US)
Pages (from-to)10701-10705
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume88
Issue number23
DOIs
StatePublished - Jan 1 1991

Keywords

  • Electrical coupling
  • Growth control
  • Intercetlular communication
  • Ion channels
  • mRNA

ASJC Scopus subject areas

  • General

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