Tickling the Heart and the Nervous System with the Funny Current
نویسنده
چکیده
HCN channels comprise a small subfamily of proteins within the superfamily of pore-loop cation channels. In mammals, the HCN channel family includes four members (HCN1-4) that are expressed in the heart and in the nervous system. Hyperpolarization-activated cation currents produced by HCN channels (Ih, If or Iq), contribute to a wide range of physiological functions including cardiac and neuronal pacemaker activity, the setting of resting potentials, dendritic integration of synaptic transmission and learning8,42. Throughout this article If refers to cardiac currents and Ih refers to non-cardiac currents.
منابع مشابه
Funny channels in the control of cardiac rhythm and mode of action of selective blockers.
"Funny" (f) channels underlie the cardiac "pacemaker"I(f) current, originally described as an inward current activated on hyperpolarization to the diastolic range of voltages in sino-atrial node myocytes [Brown, HF, DiFrancesco, D, Noble, SJ. How does adrenaline accelerate the heart? Nature 1979;280:235-236]. The involvement of funny channels in the generation and modulation of cardiac pacemake...
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