The fast and slow ups and downs of HCN channel regulation

Alan S. Lewis, Chad M. Estep, Dane M. Chetkovich

Research output: Contribution to journalReview articlepeer-review

38 Scopus citations


Hyperpolarization-activated cyclic nucleotide-gated (HCN) channels (h channels) form the molecular basis for the hyperpolarization-activated current, Ih, and modulation of h channels contributes to changes in cellular properties critical for normal functions in the mammalian brain and heart. Numerous mechanisms underlie h channel modulation during both physiological and pathological conditions, leading to distinct changes in gating, kinetics, surface expression, channel conductance or subunit composition of h channels. Here we provide a focused review examining mechanisms of h channel regulation, with an emphasis on recent findings regarding interacting proteins such as TRIP8b. This review is intended to serve as a comprehensive resource for physiologists to provide potential molecular mechanisms underlying functionally important changes in Ih in different biological models, as well as for molecular biologists to delineate the predicted h channel changes associated with complex regulatory mechanisms in both normal function and in disease states.

Original languageEnglish (US)
Issue number3
StatePublished - Jan 1 2010


  • Channel trafficking
  • Epilepsy
  • HCN channels
  • I
  • I
  • Long QT syndrome
  • TRIP8b
  • Voltage-gated ion channel

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry


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