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Mechanism of Membrane Hyperpolarization by Extracellular K+ in Resistance-sized Cerebral Arterial Muscle Cell of Rabbit
SeHoonKim, KunMooChoi, HoeSukKim, ByeongHwaJeon, SeokJongChang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.1 1 1-10 (10 pages)
We sought to find out the mechanism of vascular relaxation by extracellular K concentration ([K]o) in the cerebral resistant arteriole from rabbit. Single cells were isolated from the cerebral resistant arteriole, and using voltage-clamp technique barium-sensitive K currents were recorded, and their characteristics were observed. Afterwards, the changes in membrane potential and currents through the membrane caused by the change in [K]o was observed. In the smooth... -
Moderate Elevation of Extracellular K+ Concentration Induces Vasorelaxation in Isolated Rat, Rabbit and Human Cerebral Arteries Role of Na Pump and Ba-Sensitive Process
DongHoKim, SungJoonKim, SangJinLee, SungJinPark, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.6 7 705-714 (10 pages)
Cerebral blood vessels relax when extracellular K concentrations ([K])e are elevated moderately (2∼15 mM, K-induced vasorelaxation). We have therefore studied the underlying mechanism for this K- induced vasorelaxation in the isolated middle cerebral arteries (MCAs). The effects of ouabain and Ba2 on K-induced vasorelaxation were examined to determine the role of sodium pump and/or Ba-sensitive process (possibly, inward rectifier K current) in the...
