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Ionic currents responsible for excitability ofisolated rat retinal isolated ganglion cells
N. N. Veselovskaya, N.S. Veselovsky
Kiev Center of Eye Pathology; А. А. Bogomoletz Institute of PhysiologyNational Academy of Sciences of Ukraine, Kiev
Abstract
Ionic currents responsible for excitability of retinal ganglion cells (RGC) freshly
isolated from eyes of adult rats were studied. Outward potassium currents in RGC
represented by populations of slow inactivating and non-inactivating currents. Inward
Н. М. Веселовська, М. С. Веселовський
40 ISSN 0201-8489 Фізіол. журн., 2001, Т. 47, № 2
sodium currents were completely blocked by extracellular application of 0.25 мM
TTX. Calcium conductance in freshly isolated RGC has two components: low- and
high-threshold. Extracellular application of nifedipine (10 мM) or Cd2+ (10 мM)
blocked high threshold calcium currents by 28% and 60%, correspondingly, without
any significant effect on low threshold calcium currents
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