From funny current to HCN channels: 20 years of excitation

被引:169
作者
Accili, EA [1 ]
Proenza, C
Baruscotti, M
DiFrancesco, D
机构
[1] Unita Univ Milan, Dipartimento Fisiol & Biochim Gen, Lab Fisiol Mol & Neurobiol, I-20133 Milan, Italy
[2] Unita Univ Milan, Ist Nazl Fis Mat, I-20133 Milan, Italy
[3] Simon Fraser Univ, Sch Kinesiol, Burnaby, BC V5A 1S6, Canada
来源
NEWS IN PHYSIOLOGICAL SCIENCES | 2002年 / 17卷
关键词
D O I
10.1152/physiologyonline.2002.17.1.32
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
The "funny" (pacemaker) current has unusual characteristics, including activation on hyperpolarization, permeability to K+ and Na+, modulation by internal cAMP, and a tiny, single-channel conductance. In cardiac cells and neurons, pacemaker channels control repetitive activity and excitability. The recent cloning of HCN subunits provides new insight into the molecular basis for the funny channel properties.
引用
收藏
页码:32 / 37
页数:6
相关论文
共 20 条
  • [1] Properties and modulation of I-f in newborn versus adult cardiac SA node
    Accili, EA
    Robinson, RB
    DiFrancesco, D
    [J]. AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY, 1997, 272 (03): : H1549 - H1552
  • [2] Integrated allosteric model of voltage gating of HCN channels
    Altomare, C
    Bucchi, A
    Camatini, E
    Baruscotti, M
    Viscomi, C
    Moroni, A
    DiFrancesco, D
    [J]. JOURNAL OF GENERAL PHYSIOLOGY, 2001, 117 (06) : 519 - 532
  • [3] Action of internal pronase on the f-channel kinetics in the rabbit SA node
    Barbuti, A
    Baruscotti, M
    Altomare, C
    Moroni, A
    DiFrancesco, D
    [J]. JOURNAL OF PHYSIOLOGY-LONDON, 1999, 520 (03): : 737 - 744
  • [4] Properties of hyperpolarization-activated pacemaker current defined by coassembly of HCN1 and HCN2 subunits and basal modulation by cyclic nucleotide
    Chen, C
    Wang, C
    Siegelbaum, SA
    [J]. JOURNAL OF GENERAL PHYSIOLOGY, 2001, 117 (05) : 491 - 503
  • [5] Functional roles of charged residues in the putative voltage sensor of the HCN2 pacemaker channel
    Chen, J
    Mitcheson, JS
    Lin, M
    Sanguinetti, MC
    [J]. JOURNAL OF BIOLOGICAL CHEMISTRY, 2000, 275 (46) : 36465 - 36471
  • [6] Dual allosteric modulation of pacemaker (f) channels by cAMP and voltage in rabbit SA node
    DiFrancesco, D
    [J]. JOURNAL OF PHYSIOLOGY-LONDON, 1999, 515 (02): : 367 - 376
  • [7] DIFRANCESCO D, 1993, ANNU REV PHYSIOL, V55, P455, DOI 10.1146/annurev.physiol.55.1.455
  • [8] Molecular characterization of the hyperpolarization-activated cation channel in rabbit heart sinoatrial node
    Ishii, TM
    Takano, M
    Xie, LH
    Noma, A
    Ohmori, H
    [J]. JOURNAL OF BIOLOGICAL CHEMISTRY, 1999, 274 (18) : 12835 - 12839
  • [9] A family of hyperpolarization-activated mammalian cation channels
    Ludwig, A
    Zong, XG
    Jeglitsch, M
    Hofmann, F
    Biel, M
    [J]. NATURE, 1998, 393 (6685) : 587 - 591
  • [10] Cellular expression and functional characterization of four hyperpolarization-activated pacemaker channels in cardiac and neuronal tissues
    Moosmang, S
    Stieber, J
    Zong, XG
    Biel, M
    Hofmann, F
    Ludwig, A
    [J]. EUROPEAN JOURNAL OF BIOCHEMISTRY, 2001, 268 (06): : 1646 - 1652