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Subsets of ATP‐sensitive potassium channel (K ATP ) inhibitors increase gap junctional intercellular communication in metastatic cancer cell lines independent of SUR expression
Author(s) -
Bodenstine Thomas M.,
Vaidya Kedar S.,
Ismail Aimen,
Beck Benjamin H.,
Diers Anne R.,
Edmonds Mick D.,
Kirsammer Gina T.,
Landar Aimee,
Welch Danny R.
Publication year - 2012
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2011.11.017
Subject(s) - intracellular , gap junction , microbiology and biotechnology , potassium channel , cell signaling , cell culture , cancer cell , biology , chemistry , biophysics , signal transduction , cancer , genetics
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.