NA+-ACTIVATED K+ CHANNELS ARE WIDELY DISTRIBUTED IN RAT CNS AND IN XENOPUS OOCYTES

被引:50
作者
EGAN, TM
DAGAN, D
KUPPER, J
LEVITAN, IB
机构
[1] BRANDEIS UNIV,GRAD DEPT BIOCHEM,WALTHAM,MA 02254
[2] BRANDEIS UNIV,CTR COMPLEX SYST,WALTHAM,MA 02254
[3] TECHNION ISRAEL INST TECHNOL,FAC MED,RAPPAPORT FAMILY INST,DEPT PHYSIOL & BIOPHYS,IL-30197 HAIFA,ISRAEL
[4] ST LOUIS UNIV,SCH MED,DEPT PHARMACOL & PHYSIOL SCI,ST LOUIS,MO 63104
关键词
OLFACTORY BULB; POTASSIUM CHANNEL; SODIUM-ACTIVATED; XENOPUS OOCYTE;
D O I
10.1016/0006-8993(92)90913-T
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
We recorded the activity of K+ channels activated by sodium (K(Na) channels) in two widely used preparations, prima cell cultures prepared from neocortex, cerebellum, midbrain, brainstem and spinal cord, and Xenopus oocytes. K(Na) channels from all regions shared an absolute dependence on [Na+], had conductances of 140-170 pS in symmetrical 150 mM K+ and exhibited characteristic substates. The role of this channel must now be considered in terms of its widespread distribution.
引用
收藏
页码:319 / 321
页数:3
相关论文
共 14 条
  • [1] SODIUM-ACTIVATED POTASSIUM CURRENT IN CULTURED AVIAN NEURONS
    BADER, CR
    BERNHEIM, L
    BERTRAND, D
    [J]. NATURE, 1985, 317 (6037) : 540 - 542
  • [2] BAUGHMAN RW, CULTURING NERVE CELL, P227
  • [3] CALCIUM-DEPENDENT POTASSIUM CONDUCTANCE IN GUINEA-PIG OLFACTORY CORTEX NEURONS INVITRO
    CONSTANTI, A
    SIM, JA
    [J]. JOURNAL OF PHYSIOLOGY-LONDON, 1987, 387 : 173 - 194
  • [4] A NA+-ACTIVATED K+ CURRENT IN CULTURED BRAIN-STEM NEURONS FROM CHICKS
    DRYER, SE
    FUJII, JT
    MARTIN, AR
    [J]. JOURNAL OF PHYSIOLOGY-LONDON, 1989, 410 : 283 - 296
  • [5] EGAN TM, 1992, J NEUROSCI, V12, P1964
  • [6] NOREPINEPHRINE SELECTIVELY REDUCES SLOW CA2+-MEDIATED AND NA+-MEDIATED K+ CURRENTS IN CAT NEOCORTICAL NEURONS
    FOEHRING, RC
    SCHWINDT, PC
    CRILL, WE
    [J]. JOURNAL OF NEUROPHYSIOLOGY, 1989, 61 (02) : 245 - 256
  • [7] POTASSIUM CURRENT ACTIVATED BY INTRACELLULAR SODIUM IN QUAIL TRIGEMINAL GANGLION NEURONS
    HAIMANN, C
    BERNHEIM, L
    BERTRAND, D
    BADER, CR
    [J]. JOURNAL OF GENERAL PHYSIOLOGY, 1990, 95 (05) : 961 - 979
  • [8] POTENTIATION OF A TRANSIENT OUTWARD CURRENT BY NA+ INFLUX IN CRAYFISH NEURONS
    HARTUNG, K
    [J]. PFLUGERS ARCHIV-EUROPEAN JOURNAL OF PHYSIOLOGY, 1985, 404 (01): : 41 - 44
  • [9] INTRACELLULAR NA+ ACTIVATES A K+ CHANNEL IN MAMMALIAN CARDIAC-CELLS
    KAMEYAMA, M
    KAKEI, M
    SATO, R
    SHIBASAKI, T
    MATSUDA, H
    IRISAWA, H
    [J]. NATURE, 1984, 309 (5966) : 354 - 356
  • [10] SODIUM-DEPENDENT AND CALCIUM-DEPENDENT CONDUCTANCES OF NEURONS IN THE ZEBRA FINCH HYPERSTRIATUM-VENTRALE PARS CAUDALE INVITRO
    KUBOTA, M
    SAITO, N
    [J]. JOURNAL OF PHYSIOLOGY-LONDON, 1991, 440 : 131 - 142