Airway hydration, apical K+ secretion, and the Large-conductance, Ca2+-activated and voltage-dependent potassium (BK) channel

Adrian Kis, Stefanie Krick, Nathalie Baumlin, Matthias Salathe

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Large-conductance, calcium-activated, and voltage-gated K+(BK) channels are expressed in many tissues of the human body, where they play important roles in signaling not only in excitable but also in nonexcitable cells. Because BK channel properties are rendered in part by their association with four β and four γ subunits, their channel function can differ drastically, depending on in which cellular system they are expressed. Recent studies verify the importance of apically expressed BK channels for airway surface liquid homeostasis and therefore of their significant role in mucociliary clearance. Here, we review evidence that inflammatory cytokines, which contribute to airway diseases, can lead to reduced BK activity via a functional down-regulation of the 7 regulatory subunit LRRC26. Therefore, manipulation of LRRC26 and pharmacological opening of BK channels represent two novel concepts of targeting epithelial dysfunction in inflammatory airway diseases.

Original languageEnglish (US)
Pages (from-to)S163-S168
JournalAnnals of the American Thoracic Society
StatePublished - Apr 2016


  • Airway surface liquid
  • BK channels
  • Mucociliary clearance

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine


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