Ischemic Preconditioning Protects Against Gap Junctional Uncoupling in Cardiac Myofibroblasts

Rune Sundset, Marie Cooper, Svein-Ole Mikalsen, Kirsti Ytrehus

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Ischemic preconditioning increases the heart's tolerance to a subsequent longer ischemic period. The purpose of this study was to investigate the role of gap junction communication in simulated preconditioning in cultured neonatal rat cardiac myofibroblasts. Gap junctional intercellular communication was assessed by Lucifer yellow dye transfer. Preconditioning preserved intercellular coupling after prolonged ischemia. An initial reduction in coupling in response to the preconditioning stimulus was also observed. This may protect neighboring cells from damaging substances produced during subsequent regional ischemia in vivo, and may preserve gap junctional communication required for enhanced functional recovery during subsequent reperfusion.
Original languageEnglish
Pages (from-to)51-66
Number of pages15
JournalCell Communication & Adhesion
Issue number2-4
Publication statusPublished - Jan 2004
Externally publishedYes


  • Cardiac myofibroblasts
  • connexin43
  • coupling
  • gap junctions
  • ischemia
  • preconditioning


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