Subsets of ATP-sensitive potassium channel (K ATP) inhibitors increase gap junctional intercellular communication in metastatic cancer cell lines independent of sur expression

Thomas M. Bodenstine, Kedar S. Vaidya, Aimen Ismail, Benjamin H. Beck, Anne R. Diers, Mick D. Edmonds, Gina T. Kirsammer, Aimee Landar, Danny R. Welch*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Gap junctional intercellular communication (GJIC) regulates cellular homeostasis by propagating signaling molecules, exchanging cellular metabolites, and coupling electrical signals. In cancer, cells exhibit altered rates of GJIC which may play a role in neoplastic progression. K ATP channels help maintain membrane polarity and linkages between K ATP channel activity and rates of GJIC have been established. The mechanistic relationship has not been fully elucidated. We report the effects of treatment with multiple K ATP antagonist compounds on GJIC in metastatic cell lines demonstrating an increase in communication rates following treatment with compounds possessing specificities towards the SUR2 subunit of K ATP. These effects remained consistent using cell lines with different expression levels of SUR1 and SUR2, suggesting possible off target effects on GJIC by these compounds.

Original languageEnglish (US)
Pages (from-to)27-31
Number of pages5
JournalFEBS Letters
Volume586
Issue number1
DOIs
StatePublished - Jan 2 2012

Keywords

  • Gap junction
  • Glibenclamide
  • K
  • Sulfonylurea

ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

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