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171.

The Role of K+ Channels on Spontaneous Action Potential in Rat Clonal Pituitary GH3 Cell Line

HyewhonRhim, Hye-JungBaek, Won-KyungHo, YungEEarm 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.2 1 81-90 (10 pages)

HyewhonRhim, Hye-JungBaek, Won-KyungHo, YungEEarm 저
...
- 3,000원
potential (SAP) were investigated using whole-cell variation of patch clamp techniques under current- and voltage-clamp recording conditions in rat clonal pituitary GH3 cells. Heterogeneous pattern of SAP activities was changed into more regular mode with elongation of activity duration and afterhyperpolarization by treatment of TEA (10 mM). Under this condition, exposure of the class III antiarrhythmic agent E-4031 (5μM) to GH3 cells hardly affected SAP activities. On the other hand, the main...
172.

Effect of Propofol, an Intravenous Anesthetic Agent, on KATP Channels of Pancreatic β-cells in Rats

EunJeePark, Dae-KyuSong, JaeKyuCheun, JungInBae, Won-KyungHo, YungEEarm 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.1 4 25-31 (7 pages)

EunJeePark, Dae-KyuSong, JaeKyuCheun, JungInBae, Won-KyungHo, YungEEarm 저
...
- 3,000원
ATP-sensitive potassium channels (KATP channels) play an important role in insulin secretion from pancreatic beta cells. We have investigated the effect of propofol on KATP channels in cultured single pancreatic beta cells of rats. Channel activity was recorded from membrane patches using the patch-clamp technique. In the inside-out configuration bath-applied propofol inhibited the KATP channel activities in a dose-dependent manner. The half-maximal inhibition dose (ED50) was 48.6⁑8.4μM...
173.

Decreased Voltage Dependent K+ Currents in Cerebral Arterial Smooth Muscle Cells of One-Kidney, One-Clip Goldblatt Hypertensive Rat

YoungSunOh, SeHoonKim, HoeSukKim, ByeongHwaJeon, SeokJongChang, KwangJinKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.5 3 471-479 (9 pages)

YoungSunOh, SeHoonKim, HoeSukKim, ByeongHwaJeon, SeokJongChang, KwangJinKim 저
...
- 3,000원
Cell capacitance of hypertensive rat was similar to that of normotensive rat. Cell capacitance of normotensive rat and 1K,1C-GBH rat were 20.8⁑2.3 and 19.5⁑1.4 pF, respectively. The resting membrane potentials measured in current clamp mode from normotensive rat and 1K,1C-GBH rat were ⁣45.9⁑1.7 and ⁣38.5⁑1.6 mV, respectively. 4-AP (5 mM) caused the resting membrane potential hypopolarize but charybdotoxin (0.1μM) did not cause any change of membrane potentia...
174.

Regulation of Magnesium Release by cAMP during Chemical Hypoxia in the Rat Heart and Isolated Ventricular Myocytes

JinShangKimAntonioScarpa 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.1 8 59-68 (10 pages)

JinShangKimAntonioScarpa 저
...
- 3,000원
min. Measurement of [Mg2⁢]i confirmed that ATP depletion was accompanied by an increase in [Mg2⁢]i. No change in Mg2⁢ efflux was observed when cells were incubated with MI. In the presence of MI, the cAMP-induced Mg2⁢ effluxes were inhibited by quinidine, imipramine, and removal of extracellular Na⁢. In addition, after several min of perfusion with Na⁢-free buffer, a large increase in Mg2⁢ efflux occurred when Na⁢-free buffer was switched to 120 mM...
175.

Role of Adenosine in the Activation of Myocardial Catalase Induced by Brief Regional Ischemia

Young-hoonKim, Chan-hyungKim, Gi-taeKim, HongChoi, Jong-wanPark, Myung-sukKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.1 7 53-57 (5 pages)

Young-hoonKim, Chan-hyungKim, Gi-taeKim, HongChoi, Jong-wanPark, Myung-sukKim 저
...
- 1,500원
The activities of myocardial antioxidant enzymes are known to increase in the hearts preconditioned with the brief episodes of ischemia. This study was undertaken to elucidate the possible involvement of adenosine in the stimulation of myocardial catalase induced by the brief regional ischemia in rabbit hearts. Coronary artery descending the middle anterior wall of left ventricle was occluded for 15 min, followed by 1 hr of reperfusion. Upon reperfusion after the brief ischemia, the activity of...
176.

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)

Jung-AeKim, YongSooLee, KeunHuh 저
...
- 3,000원
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...
177.

Role of Protein Kinases on NF-κB Activation and Cell Death in Bovine Cerebral Endothelial Cells

YoungSooAhn, ChulHoonKim, JooHeeKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.1 2 11-18 (8 pages)

YoungSooAhn, ChulHoonKim, JooHeeKim 저
...
- 3,000원
Nuclear factor κB (NF-κB) activation is modulated by various protein kinases. Activation of NF-κB is known to be important in the regulation of cell viability. The present study investigated the effect of inhibitors of protein tyrosine kinase (PTK), protein kinase C (PKC) and protein kinase A (PKA) on NF-κB activity and the viability of bovine cerebral endothelial cells (BCECs). In serum-deprivation-induced BCEC death, low doses of TNFα showed a protective effect. TNFα induced NF-κB...
178.

Modulation of ATP-Induced Activation of the Muscarinic K+ Channel Activity by Protein Kinase C

Yang-MiKim, Hong-KiPark, Jae-HeeHan, Choon-OkPark, Seong-GeunHong 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 11 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.6 11 743-753 (11 pages)

Yang-MiKim, Hong-KiPark, Jae-HeeHan, Choon-OkPark, Seong-GeunHong 저
...
- 4,000원
The atrial acetylcholine-activated K⁢ (KACh) channel is gated by the pertussis toxin-sensitive inhibitory G (GK) protein. Earlier studies revealed that ATP alone can activate the KACh channel via transphosphorylation mediated by nucleoside-diphosphate kinase (NDPK) in atrial cells of rabbit and guinea pig. This channel can be activated by various agonists and also modulated its function by phosphorylation. ATP-induced KACh channel activation (AIKA) was maintained in the presence of the...
179.

Roles of Na+-Ca2+ Exchange in the Negative Force-Frequency Relationship

ChangMannKoSoonJinKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.6 8 715-724 (10 pages)

ChangMannKoSoonJinKim 저
...
- 3,000원
Frequency-force relationships (FFR) were studied in electrically field stimulated rat left atria (LA) by reducing the stimulation frequency from resting 3 Hz to test frequencies (0.1-1 Hz) for 5 minutes. The twitch amplitudes of LA elicited the typical negative staircases with 3-phased changes: the initial rapid increase, the second decrease and the following plateau at test frequencies. Verapamil (3⁓10⁣5 M) pretreatment elicited frequency-dependent suppression of the twitch...
180.

The Role of Intracellular Mg2+ in Regulation of Ca2+-activated K+ Channel in Pulmonary Arterial Smooth Muscle Cells of the Rabbit

SukHoLeeMyoungKyuPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.5 9 611-616 (6 pages)

SukHoLeeMyoungKyuPark 저
...
- 3,000원
Although the Ca2+-activated K+ (IK,Ca) channel is known to play an important role in the maintenance of resting membrane potential, the regulation of the channel in physiological condition is not completely understood in vascular myocytes. In this study, we investigated the role of cytoplasmic Mg2+ on the regulation of IK,Ca channel in pulmonary arterial myocytes of the rabbit using the inside-out patch clamp technique. Mg2+ increased open probability (Po), but decreased the magnitude of single...

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