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N-Type Calcium Channels
KeithS.Elmslie 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.6 12 525-530 (6 pages)
The early studies of cardiac and smooth muscle cells provided evidence for two different calcium channels, the L-type (also called high-voltage activated [HVA]) and the T-type (low-voltage activated [LVA]). These calcium channels provided calcium for muscle contractions and pace-making activities. As might be expected, the number of different calcium channels increased when researchers studied neurons and the identification of the neuronal calcium channel has proven to be much more difficult... -
The Effect of NO Donor on Contraction, Cytosolic Ca2+ Level and Ionic Currents in Guinea-pig Ileal Smooth Muscle
Seong-ChunKwon, Ki-YoungPark, Duck-SunAhn, Young-HoLee, Bok-SoonKang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.1 5 33-40 (8 pages)
parallel with decreased [Ca2]i. Using the patch clamp technique with a holding potential of 60 mV, SIN-1 (10μM) decreased peak Ba currents (IBa) by 30.9⁑5.4% (n=6) when voltage was stepped from 60 mV to 10 mV and this effect was blocked by ODQ (1μM), a soluble guanylyl cyclase inhibitor. Cu/Zn SOD (100 U/ml), the free radical scavenger, had little effect on basal IBa, and SIN-1 (10μM) inhibited peak IBa by 32.4⁑5.8% (n=5) in the presence of Cu/Zn SOD.... -
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)
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 muscle... -
Inhibitory Effect of Caffeine on Carbachol-Induced Nonselective Cationic Current in Guinea-Pig Gastric Myocytes
SungJoonKim, KyungWanMin, YoungChulKim, SangJinLee, InsukSo, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.3 10 353-359 (7 pages)
In gastrointestinal smooth muscle, muscarinic stimulation by carbachol (CCh) activates nonselective cation channel current (ICCh) which is facilitated by intracellular [Ca2] increase. Caffeine is widely used in experiments to mobilize Ca2 from intracellular stores. This study shows a strong inhibitory effect of caffeine on ICCh in guinea-pig gastric myocyte. In this study, the underlying mechanism of the inhibitory effect of caffeine was investigated. ICCh was completely... -
ATP-Sensitive K+ Currents in Gastric Myocytes Isolated from Guinea-pig
JaeYeoulJun, CheolHoYeum, PyungJinYun, JongSeongPark, SungJoonKim, InsukSo, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.1 11 85-93 (9 pages)
ATP-sensitive K+ channels (KATP) were not identified in gastric smooth muscle cells. However， in tension recording of intact gastric circular muscle， lemakalim of KATP channels opener in other tissues suppressed mechanical contractions and this effect was blocked by glibenclamide， a specific inhibitor of KATP channels. The aims of this study were to investigate whether KATP channels exist in gastric smooth muscle of guinea-pig and to know its physiological role. Whole cell K'+ curr‘ents... -
Electrophysiological Responses of δ -Opioid Receptor Expressed on HEK293 Cells
Kim, Jin-Hyuk, Koh, Young-Ik, Chin, He-Min, Lee, Yong-Sung, Cho, Yeul-Hee, Kim, Kee-Soon 대한생리학회 대한생리학회지 8 Pages
대한생리학회 대한생리학회지 1995, 제 29권 제 2호 12 301-308 (8 pages)
X glioma hybrid) cDNA library. Also studied were effects of 8-bromo-cyclic AMP and naloxone on DPDPE-induced changes in the voltage sensitive outward current. The voltage sensitive outward currents were recorded using perforated patch technique at room temperature. In the non-transformed HEK293 cells, DPDPE did not alter voltage sensitive outward current, indicating that no native δ-Opioid receptor had been developed. However, (1 μM) DPDPE remarkably increased the voltage sensitive outward... -
Regulatory Action of ß-adrenergic Agonist and 8-bromocyclic AMP on Calcium Currents in the Unfertilized Mouse Eggs
Haan, Jae-Hee, Cheong, Seung-Jin, Kim, Yang-Mi, Park, Choon-Ok, Hong, Seong-Geun 대한생리학회 대한생리학회지 10 Pages
대한생리학회 대한생리학회지 1993, 제 27권 제 2호 6 175-184 (10 pages)
There are many report suggesting that influx and intracellular calcium concentration ([Ca2+]i) are related to cell signalling in various cells. However, it has not been reported that calcium channel activation is affected by the substances involved in signal transduction pathways in the mouse eggs. In this study, the effects of isoprenaline (ISP) and cyclic AMP on calcium influx through calcium channels were investigated to show their relationship with the signal transduction process in... -
Nortriptyline, a tricyclic antidepressant, inhibits voltage-dependent K+ channels in coronary arterial smooth muscle cells
SungEunShin, HongliangLi, HanSolKim, HyeWonKim, MiSeonSeo, Kwon-SooHa, Eun-TaekHan, Seok-HoHong, AmyL.Firth, Il-WhanChoi6, YoungMinBae, Won 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.2 10 225-232 (8 pages)
whole-cell patch clamp technique. Nortriptyline inhibited Kv currents in a concentration-dependent manner, with an apparent IC50 value of 2.86±0.52 µM and a Hill coefficient of 0.77±0.1. Although application of nortriptyline did not change the activation curve, nortriptyline shifted the inactivation current toward a more negative potential. Application of train pulses (1 or 2 Hz) did not change the nortriptyline-induced Kv channel inhibition, suggesting that the effects of nortiprtyline... -
DAMGO modulates two-pore domain K+ channels in the substantia gelatinosa neurons of rat spinal cord
PyungSunCho, HanKyuLee, , SangHoonLee, JayZoonIm, SungJunJung 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2016, Vol.20 No.5 10 525-531 (7 pages)
a slice whole-cell patch clamp technique. Also we confirmed which subtypes of K2P channels were associated with DAMGO-induced currents, measuring the expression of K2P channel in whole spinal cord and SG region. DAMGO caused a robust hyperpolarization and outward current in the SG neurons, which developed almost instantaneously and did not show any time-dependent inactivation. Half ofthe SG neurons exhibited a linear I~V relationship of the DAMGO-induced current, whereas rest of the neurons...
