자료유형
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Thiol-dependent Redox Mechanisms in the Modification of ATP-Sensitive Potassium Channels in Rabbit Ventricular Myocytes
JinHan, NariKim, DangVanCuong, ChunghuiKim, EuiyongKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.1 4 15-23 (9 pages)
Cellular redox state is known to be perturbed during ischemia and that Ca2 and K channels have been shown to have functional thiol groups. In this study, the properties of thiol redox modulation of the ATP-sensitive K (KATP) channel were examined in rabbit ventricular myocytes. Rabbit ventricular myocytes were isolated using a Langendorff column for coronary perfusion and collagenase. Single-channel currents were measured in excised membrane patch configuration of... -
Differential Changes of ATP-sensitive Potassium Channel Current after Hypoxia-reperfusion Treatment in Mouse Neuroblastoma 2a (N2a) Cell
Ji-HoPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 4 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2002, Vol.6 No.4 2 183-186 (4 pages)
Ischemic damage is one of the most serious problems. The openers of KATP channel have been suggested to have an effect to limit the ischemic damage. However, it is not yet clear how KATP channels of a cell correspond to hypoxic damage. To address the question, N2a cells were exposed to two different hypoxic conditions as follows: 6 hours hypoxia followed by 3 hours reperfusion and 12 hours hypoxia followed by 3 hours reperfusion. As the results, 6 hours hypoxic treatment increased... -
Increase of Intracellular Ca2+ Concentration Induced by Lysophosphatidylcholine in Murine Aortic Endothelial Cells
MeiHongZhu, SungJinPark, HyunJinKim, DongKiYang, SukHyoSuh, InsukSo, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2002, Vol.6 No.2 5 93-100 (8 pages)
Effects of oxidized low-density lipoprotein (ox-LDL), l-α-stearoyl-lysophosphatidylcholine (LPC), on intracellular Ca2 concentration were examined in mouse endothelial cells by measuring intracellular Ca2 concentration ([Ca2]i) with fura 2-AM and reverse transcription-polymerase chain reaction (RT-PCR). LPC increased [Ca2]i under the condition of 1.5 mM [Ca2]o but did not show any effect under the nominally Ca2-free condition. Even after the store... -
THI 52 Inhibits Inducible Nitric Oxide Synthase Gene Expression in RAW 264.7 Cells and Rat Lung Tissue by Lipopolysaccharide
BogKyuLee, MinKyuPark, HanGeukSeo, HyeSookYun-Choi, DuckHyungLee, KiChurlChang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.5 10 443-449 (7 pages)
Previously we reported that THI 52 inhibits tumor necrosis factor (TNF)-α mRNA expression in mouse peritoneal macrophages exposed to LPS plus IFN-γ. In the present study, the effects of THI 52 on vascular reactivity ex vivo, and iNOS protein expression (rat lung) were investigated in LPS-treated rats. Treatment of THI 52 concentration-dependently reduced not only serum nitrite production but also the expression of iNOS protein in rat lung tissues. Thoracic aorta taken from LPS injected rat... -
Altered Electrophysiological Properties of Coronary Artery in Isoprenaline-Induced Cardiac Hypertrophy
NariKim, JinHan, EuiyongKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.5 7 413-421 (9 pages)
An impaired smooth muscle cell (SMC) relaxation of coronary artery by alteration of K channels would be the most potential explanation for reduced coronary reserve in left ventricular hypertrophy (LVH), however, this possibility has not been investigated. We performed morphometrical analysis of the coronary artery under electron microscopy and measured Ca2-activated K (KCa) currents and delayed rectifier K (Kdr) currents by whole-cell and inside-out patch-clamp technique in single... -
Effect of Heme Oxygenase Induction by NO Donor on the Aortic Contractility
Chang-KyunKim, UyDongSohn, Seok-YongLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.1 12 87-92 (6 pages)
Carbon monoxide (CO) binds to soluble guanylate cyclase to lead its activation and elicits smooth muscle relaxation. The vascular tissues have a high capacity to produce CO, since heme oxygenase-2 (HO-2) is constitutively expressed in endothelial and smooth muscle cells, and HO-1 can be greatly up-regulated by oxidative stress. Moreover, the substrate of HO, heme, is readily available for catalysis in vascular tissue. Although the activation of heme oxygenase pathway under various stress... -
Pulse Exposure to Ethanol Augments Vascular Contractility Through Stress Response
Eun-KyoungYangInKyeomKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.1 7 47-53 (7 pages)
the levels of myosin light chain phosphorylation. There were no significant differences in contractions produced by 1μmol/L phorbol 12,13-dibutyrate, a protein kinase C activator, whether the tissues were exposed to 5% ethanol or not. This is the first report to show that even short exposure to ethanol has a delayed effect to increase vascular smooth muscle contractility through a modulation of thick filament regulation. It may be a mechanism by which ingestion of alcohol induces hypertension. -
Relaxant Effect of 4-Aminopyridine on the Mesenteric Artery of Rat
Se-HoonKimTae-ImLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.6 4 455-461 (7 pages)
(4-AP) has an excitatory effect on vascular smooth muscle due to causing membrane depolarization by blocking K-channel. However, we observed that 4-AP had an inhibitory effect on the mesenteric artery of rat. Therefore, we investigated the mechanism of 4-AP-induced vasorelaxation. The mesenteric arcuate artery and its branches were isolated and cut into ring. The ring segment was immersed in HEPES-buffered solution and its isometric tension was measured. 4-AP (0.1∼10 mM) induced a... -
Effects of Prostaglandin F2α on Membrane Potentials and K+ Currents in Rabbit Middle Cerebral Arterial Cells
NariKim, JinHan, WonGueKim, EuiyongKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.4 5 301-309 (9 pages)
F2α (PGF2α) on membrane potentials, Ca2-activated K (KCa) channels, and delayed rectifier K (KV) channels using the patch-clamp technique in single rabbit middle cerebral arterial smooth muscle cells. PGF2α significantly hyperpolarized membrane potentials and increased outward whole-cell K currents. PGF2α increased open-state probability of KCa channels without the change of the open and closed kinetics. PGF2α increased the amplitudes of KV currents with a... -
Changes in the Endothelin-1-induced Contraction of Aorta in Streptozotocin-induced Diabetic Rats
HyunJooCheong, EunJinKim, SuJinKim, SunHeeLee, ByungYongRhim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 11 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.3 3 185-195 (11 pages)
and DM rats), respectively. IRL 1620 and sarafotoxin S6c, ETB agonists, induced relaxation in control rats but not in DM rats. These results indicate that endothelial cell dysfunction and enhanced immunoreactivity of ET-1 have been found in DM rat and ET-1-induced contraction was attenuated in DM rat. These attenuated responses might be at least in part caused by the alteration of ETA receptor properties (e.g. desensitization), and partly related with an alteration in intracellular mechanism for...
