자료유형
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Forward-Mode Na+-Ca2+ Exchange during Depolarization in the Rat Ventricular Myocytes with High EGTA
Eun-GiKim, ChangMannKo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.6 5 487-494 (8 pages)
current was converted into inward current, 47⁑1% of which was suppressed by 0.1 mM CdCl2. 10 mM caffeine increased the remaining inward current after CdCl2 in a cAMP-dependent manner. This caffeine-induced inward current was blocked by 1μM ryanodine, 10μM thapsigargin, 5 mM NiCl2, or by Na and Ca2 omission, but not by 0.1μM isoproterenol. The I∼V relationship of the caffeine-induced current elicited inward current from 45 mV to 3 mV with the peak at 2... -
Relatoinship between Sarcoplasmic Reticular Calcium Release and Na+-Ca2+ Exchange in the Rat Myocardial Contraction
Eun-GiKim, SoonJinKim, ChangMannKo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 14 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.3 4 197-210 (14 pages)
Suppressive role of Na-Ca2 exchange in myocardial tension generation was examined in the negative frequency-force relationship (FFR) of electric field stimulated left atria (LA) from postnatal developing rat heart and in the whole-cell clamped adult rat ventricular myocytes with high concentration of intracellular Ca2 buffer (14 mM EGTA). LA twitch amplitudes, which were suppressed by cyclopiazonic acid in a postnatal age-dependent manner, elicited frequency-dependent and... -
Regulation of the Contraction Induced by Emptying of Intracellular Ca2+ Stores in Cat Gastric Smooth Muscle
Hye-JungBaek, Sang-SooSim, Duck-JooRhie, ShinHeeYoon, SangJuneHahn, Yang-HyeokJo, Myung-SukKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.2 5 113-120 (8 pages)
To investigate the mechanism of smooth muscle contraction induced by emptying of intracellular Ca2 stores, we measured isometric contraction and 45Ca2 influx. CaCl2 increased Ca2 store emptying- induced contraction in dose-dependent manner, but phospholipase C activity was not affected by the Ca2 store emptying-induced contraction. The contraction was inhibited by voltage-dependent Ca2 channel antagonists dose dependently, but not by TMB-8 (intracellular... -
Effect of Imipramine on Calcium Utilization of Single Cells Isolated from Canine Detrusor
Ho-ShikShim, Hyoung-ChulChoi, Young-SookJeong, Jong-HoKim, Kwang-YounLee, Uy-DongSohn, Jeoung-HeeHa, Won-JoonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.4 9 439-445 (7 pages)
(40 mM KCl) evoked cell contraction, which was inhibited by imipramine. Caffeine, a releasing agent of the stored Ca2 from sarcoplasmic reticulum, evoked a contraction of the cells that was not blocked by the pretreatment with imipramine. These results suggest that imipramine inhibits the influx of calcium in the detrusor cells through both the receptor-operated- and voltage-gated-calcium channels, but does not affect the release of calcium from intracellular storage site. -
Thyroid Hormone-Induced Alterations of Ca2+-ATPase and Phospholamban Protein Expression in Cardiac Sarcoplasmic Reticulum
HaeWonKim, KyungMinNoh, MiyoungPark, HeeRanLee, EunHeeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.2 13 223-230 (8 pages)
Alterations of cardiovascular function associated with various thyroid states have been studied. In hyperthyroidism left ventricular contractility and relaxation velocity were increased, whereas these parameters were decreased in hypothyroidism. The mechanisms for these changes have been suggested to include alterations in the expression and/or activity levels of various proteins; α-myosin heavy chain, β- myosin heavy chain, β-receptors, the guanine nucleotide-binding regulatory protein, and... -
The Mechanism of t-Butylhydroperoxide-Induced Apoptosis in IMR- 32 Human Neuroblastoma Cells
Jung-AeKim, YongSooLee, KeunHuh 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.1 3 19-28 (10 pages)
Apoptosis has been implicated in the pathophysiological mechanisms of various neurodegenerative diseases. In a variety of cell types, oxidative stress has been demonstrated to play an important role in the apoptotic cell death. However, the exact mechanism of oxidative stress-induced apoptosis in neuronal cells is not known. In this study, we induced oxidative stress in IMR-32 human neuroblastoma cells with tert- butylhydroperoxide (TBHP), which was confirmed by significantly reduced... -
Decrease in Ca2+ Storage in the Cardiac Sarcoplasmic Reticulum of Diabetic Rat
Won-TaeKim, HaeWonKim, Young-KeeKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.6 9 725-732 (8 pages)
In order to elucidate the molecular mechanism of the intracellular Ca2 overload frequently reported from diabetic heart, diabetic rats were induced by the administration of streptozotocin, the membrane vesicles of junctional SR (heavy SR, HSR) were isolated from the ventricular myocytes, and SR Ca2 uptake and SR Ca2 release were measured. The activity of SR Ca2-ATPase was 562⁑14 nmol/min/mg protein in control heart. The activity was decreased to 413⁑30... -
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)
Ca2 release by heparin had no significant effects on the activation of ICCh. When the same cationic current had been induced by intracellular dialysis of GTP[γS] in order to bypass the muscarinic receptor, the inhibitory effect of caffeine was significantly attenuated. The results of this study indicate that both intracellular signalling pathways for ICCh, proximal and distal to G-protein activation, are suppressed by caffeine. A major inhibition was observed at the proximal level. -
Characteristics of Ca2+ Stores in Rabbit Cerebral Artery Myocytes
SungJoonKim, JinKyungKim, InsukSo, SukHyoSuh, SangJinLee, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.3 6 313-322 (10 pages)
versa. In normal Ca2-containing solution with ryanodine (2 ㄍM), the caffeine-induced rise of [Ca2]c occurred only once and in this condition, the response to histamine was also suppressed. On the other hand, in the presence of ryanodine, histamine could induce repetitive rise of [Ca2]c while the amplitude of peak rise became stepwisely decreased and eventually disappeared. These results suggest that two different Ca2-release mechanisms (caffeine-sensitive and... -
기니픽의 회장평활근에서 NANC 신경전달물질의 작용기전
이영호, 김종훈, 강복순 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 14 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.6 20 783-796 (14 pages)
Action Mechanisms of NANC Neurotransmitters in Smooth Muscle of Guinea Pig Ileum. 2 -. T1IO .. n r 1 Young-Ho Lee'， Jong-Hoon Kim
