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해마절편의 허혈성 K+ 축적에 대한 K+채널 조절 약물의 작용 Effects of K+ Channel Modulators on Extracellular K+ Accumulation during Ischemia in the Rat Hippocampal Slice
최진규, 전보권, 류판동, JinKyuChoi, Boe-GwunChunPanDongRyu 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.6 9 681-690 (10 pages)
Loss of synaptic transmission and accumulation of extracellular K([K]O) are the key features in ischemic brain damage. Here, we examined the effects of several Kchannel modulators on the early ischemic changes in population spike (PS) and [K]o in the CA1 pyramidal layer of the rat hippocampal slice using electrophysiological techniques. After onset of anoxic aglycemia (AA), orthodromic field potentials decreased and disappeared in 3.3⁑0.22 min (mean⁑SEM,... -
α-Adrenergic and Cholinergic Receptor Agonists Modulate Voltage- Gated Ca2+ Channels
Seung-YeolNah, Jae-HaKim, Cheon-HoKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.5 3 485-493 (9 pages)
via an α1-adrenergic receptor. Pretreatment with pertussis toxin (250 ng/ml) for 16 h greatly reduced norepinephrine- and carbachol-induced Ca2 current inhibition from 17⁑3% and 18⁑3% to 2⁑1% and 2⁑1%, respectively. These results demonstrate that norepinephrine, through an α1-adrenergic receptor, and carbachol, through a muscarinic receptor, inhibit Ca2 currents in adult rat trigeminal ganglion neurons via pertussis toxin sensitive GTP-binding proteins. -
Differential Inhibitory Action of Taurine between Electrically Evoked Response and Low Mg++-Induced Spontaneous Activity in the CA1 Area of the Rat Hippocampal Slices
Soo-YounBaek, Sung-GuYang, Chang-JoongLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.5 1 467-475 (9 pages)
major physiological functions of taurine(2-aminoethanesulfonic acid) is the inhibitory action on the central nervous system(CNS), the mechanism of taurine in controlling the neuronal excitation in the CNS has been in controversy. Electrically evoked pEPSP and spontaneous activity induced by the perfusion of low Mg-ACSF were recorded in the CA1 pyramidal cell layer of the hippocampal slice. To test the inhibitory effect of taurine on spontaneous responses, taurine was treated for 2... -
Effects of Arachidonic Acid on the Calcium Channel Current (IBa) and on the Osmotic Stretch-induced Increase of IBa in Guinea-Pig Gastric Myocytes
WenXieXu, SungJoonKim, InsukSo, SukHyoSuh, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.4 10 435-443 (9 pages)
We employed the whole-cell patch clamp technique to investigate the effects of arachidonic acid (AA) on barium inward current through the L-type calcium channels (IBa) and on osmotic stretch-induced increase of IBa in guinea-pig antral gastric myocytes. Under isosmotic condition, AA inhibited IBa in a dose-dependent manner to 91.1⁑1.4, 72.0⁑3.2, 46.0⁑1.8, and 20.3⁑2.3% at 1, 5, 10, 30 mM, respectively. The inhibitory effect of AA was not affected by 10 ㄍM... -
Spontaneous Electrical Activity in Cerebellar Purkinje Neurons of Postnatal Rats
SangChaeNam 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 12 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.4 2 355-366 (12 pages)
Although cerebellar Purkinje cells display spontaneous electrical activity in vivo and in slice experiments, the mechanism of the spontaneous activity generation has not been clearly understood. The aim of this study was to investigate whether cerebellar Purkinje cells of postnatal rats generate spontaneous electrical activity without synaptic inputs. Dissociated cerebellar Purkinje cells were used for reducing synaptic inputs in the present study. Cerebellar Purkinje cells with dendrites were... -
PC12 세포에서 Sertraline을 위시한 항우울제에 의한 칼슘길항 유사효과
박기창, 공인덕, 정해숙, 박규상, 한준규, 이중우, 백인호 대한신경정신의학회 신경정신의학 14 Pages
대한신경정신의학회 신경정신의학 1998, 제 37권 제 3호 14 548-561 (14 pages)
본 실험에서는 PC12 세포를 신경세포 모델로 형광물질인 fura-2 및 bisoxonol을 이용하여 세포내 유리 칼슘이온 농도 및 막전압을 각각 측정하여 화학구조가 서로 다른 몇몇 항우울제가 막전압 의존성 칼슘통로 의 활성화 및 ATP를 통한 수용체 의존성 칼슘통로의 활성화에 미치는 영향을 관찰하여 아래와 같은 결과를 얻었다. 1) 선택적 serotonin 재흡수 억제제의 하나인 sertraline은 60mM KCl 자극 및 100μM ATP 자극에 의 한 [Ca2＋]i 의 증가를 억제하였으며 이때 IC 50 값은 각각 2.5μM과 5.3μM이었다. 2) 막전압 의존성... -
향정신성 약물의 Phospholipase C와 Protein Kinase C 효소활성에 미치는 영향 - 항정신병 약물을 중심으로 一
최 영, 이기영, 이형영 대한신경정신의학회 신경정신의학 9 Pages
대한신경정신의학회 신경정신의학 1992, 제 31권 제 5호 2 837-845 (9 pages)
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GABA와 Benzodiazepine 수용체 및 그 기능
정영조, 한기석 대한신경정신의학회 신경정신의학 20 Pages
대한신경정신의학회 신경정신의학 1991, 제 30권 제 3호 1 431-450 (20 pages)
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Effect of K+-channel Blockers on the A1-adenosine Receptor-Coupled Regulation of Electrically-Evoked Norepinephrine Release in the Rat Hippocampus
최봉규(Bong Kyu Choi), 김상훈(Sang Hoon Kim) 대한약리학회 대한약리학잡지 10 Pages
대한약리학회 대한약리학잡지 1996, 제 32권 제 3호 2 301-310 (10 pages)
Since it has been reported that the depolarization-induced NE release is inhibited by activation of presynaptic A1-adenosine heteroreceptor in hippocampus, a large body of experimental data on the post-receptor mechanism of this process has been accumulated. But, the post-receptor mechanism of presynaptic A1-adenosine receptor on the NE release has not been clearly elucidated yet. Therefore, it was attempted to clarify the participation of K+-channel in the post-receptor mechanisms of the... -
A Study on the Post-Receptor Mechanism of Adenosine Receptor on Norepinephrine Release in the Rat Hippocampus
최봉규(Bong Kyu Choi), 김도경(Do Kyung Kim), 양경무( Kyung Moo Yang) 대한약리학회 대한약리학잡지 12 Pages
대한약리학회 대한약리학잡지 1996, 제 32권 제 1호 1 1-12 (12 pages)
Since it has been reported that the depolarization-induced norepinephrine (NE) release is inhibited by activation of presynaptic A1-adenosine heteroreceptor in hippocampus, a large body of experimental data on the post-receptor mechanism of this process has been accumulated. But, the post-receptor mechanism of presynaptic A1-adenosine receptor on the NE release has not been clearly elucidated yet. Therefore, it was attempted to clarify the post-receptor mechanisms of the A1-adenosine...
