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171.

Effects of Phenylephrine on the Excitability of Medial Vestibular Nuclear Neurons in Rats

Han-SeongJeong, HaeRyongHuh, Myung-JooJang, Seol-HeeHong, SujeongJang, JinPark, Seung-HanLee, Jae-HaKim, Jong-SeongPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2006, Vol.10 No.3 3 131-136 (6 pages)

Han-SeongJeong, HaeRyongHuh, Myung-JooJang, Seol-HeeHong, SujeongJang, JinPark, Seung-HanLee, Jae-HaKim, Jong-SeongPark 저
...
- 3,000원
In current-clamp mode, the frequency of spontaneous action potential of medial vestibular nuclear neurons was decreased by phenylephrine (n=15). Phenylephrine increased the amplitude of afterhyperpolarization without changes in the resting membrane potential and spike width. In voltage-clamp mode, the whole potassium currents of the medial vestibular nuclear neurons were increased by phenylephrine (n=12). These experimental results suggest that α-receptor mediates the inhibitory effects on the...
172.

Effects of Pharmacological Modulators of Ca2+-activated K+ Channels on Proliferation of Human Dermal Fibroblast

JihyunYun, TaehoKim, SoonchulMyung, HyoweonBang, InjaLim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2006, Vol.10 No.2 6 95-100 (6 pages)

JihyunYun, TaehoKim, SoonchulMyung, HyoweonBang, InjaLim 저
...
- 3,000원
K⁢ current was increased by NS1619, a specific large-conductance Ca2⁢-activated K⁢ (BK) channel activator, but decreased by iberiotoxin (IBTX), a specific BK channel inhibitor. To investigate the presence of an intermediate-conductance Ca2⁢-activated K⁢ (IK) channels, we pretreated the fibroblasts with low dose of TEA to block BK currents, and added 1-EBIO (an IK activator). 1-EBIO recovered the currents inhibited by TEA. When various Ca2⁢-activated K⁢...
173.

pH-mediated Regulation of Pacemaker Activity in Cultured Interstitial Cells of Cajal

ByungJooKim, JaeHwaLee, InsukSo, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2006, Vol.10 No.1 2 7-12 (6 pages)

ByungJooKim, JaeHwaLee, InsukSo, KiWhanKim 저
...
- 3,000원
rhythmicity by activating nonselective cation channels (NSCCs). In the present study, we investigated the general characteristics and pH-mediated regulation of pacemaker activity in cultured interstitial cells of Cajal. Under voltage clamp mode and at the holding potential of ⁣60 mV, the I-V relationships and difference current showed that there was no reversal potential and voltage-independent inward current. Also, when the holding potentials were changed from ⁢20 mV to ⁣80 mV...
174.

Effects of Nitric Oxide on Inhibitory Receptors of Rod Bipolar Cells of Rat Retina

No-GiPark, Sun-HoBai, Chang-SubJung, Myung-HoonChun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.6 6 347-352 (6 pages)

No-GiPark, Sun-HoBai, Chang-SubJung, Myung-HoonChun 저
...
- 3,000원
In the whole cell voltage-clamping mode, the gamma-aminobutyric acid (GABA) activated current showed both sustained and transient components. GABA activated transient current was fully blocked by bicuculine, a GABAA receptor antagonist. The cis-4-aminocrotonic acid (CACA), a GABAC receptor agonist, evoked the sustained current that was not blocked by bicuculline (BIC). Glycine activated the transient current. These results indicate that the RBCs possess GABAA, GABAC, and glycine inhibitory...
175.

Changes of Cytosolic Ca2+ under Metabolic Inhibition in Isolated Rat Ventricular Myocytes

SunghyunKang, NariKim, HyunJoo, JaeBoumYoum, WonSunPark, MohamedWarda, HyungkyuKim, DangVanCuong, TaehoKim, EuiyongKim, JinHan 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.5 6 291-298 (8 pages)

SunghyunKang, NariKim, HyunJoo, JaeBoumYoum, WonSunPark, MohamedWarda, HyungkyuKim, DangVanCuong, TaehoKim, EuiyongKim, JinHan 저
...
- 3,000원
To characterize cytosolic Ca2⁢ fluctuations under metabolic inhibition, rat ventricular myocytes were exposed to 200μM 2,4-dinitrophenol (DNP), and mitochondrial Ca2⁢, mitochondrial membrane potential (ΔΨm), and cytosolic Ca2⁢ were measured, using Rhod-2 AM, TMRE, and Fluo-4 AM fluorescent dyes, respectively, by Laser Scanning Confocal Microscopy (LSCM). Furthermore, the role of sarcolemmal Na⁢/Ca2⁢ exchange (NCX) in cytosolic Ca2⁢ efflux was studied in...
176.

The Role of Mitochondrial ATP-sensitive Potassium Channel on Intestinal Pacemaking Activity

ByungJooKim, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.4 4 209-214 (6 pages)

ByungJooKim, KiWhanKim 저
...
- 3,000원
using whole-cell patch clamp techniques. Under current clamp mode, at 10μM glibenclamide, there was no change in pacemaking activity of ICCs. At 30μM glibenclamide, an inhibitor of the ATP sensitive K⁢ channels, we could find two examples. If pacemaking activity of ICCs was irregulating, pacemaking activity of ICCs was changed into regulating and if in normal conditions, membrane potential amplitude was increased. At 50μM glibenclamide, the resting membrane potential was depolarized. At...
177.

The Effect of External Divalent Cations on Intestinal Pacemaking Activity

ByungJooKim, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.4 3 203-208 (6 pages)

ByungJooKim, KiWhanKim 저
...
- 3,000원
effect of 10 mM Ba2⁢, Mn2⁢ and Sr2⁢ on pacemaking activity of ICC in the presence of external 0 mM Mg2⁢, and found that 10 mM Ba2⁢ and Mn2⁢ induced large inward current and stopped the pacemaking activity of ICC (n=5). Interestingly, 10 mM Sr2⁢ induced small inward current and potentiated the amplitude of pacemaking activity of ICC (n=5). These results indicate that extracellular Ca2⁢ and Mg2⁢ are requisite for the pacemaking activity of ICC.
178.

Effects of a δ-opioid Agonist on the Brainstem Vestibular Nuclear Neuronal Activity of Rats

Tae-SunKim, MeiHuang, Myung-JooJang, Han-SeongJeong, Jong-SeongPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.3 1 137-142 (6 pages)

Tae-SunKim, MeiHuang, Myung-JooJang, Han-SeongJeong, Jong-SeongPark 저
...
- 3,000원
This study was undertaken to investigate the effects of [D-Ala2, D-Leu5]-enkephalin (DADLE) on the spontaneous activity of medial vestibular nuclear neurons of the rat. Sprague-Dawley rats, aged 14 to 16 days, were anesthetized with ether and decapitated. After enzymatic digestion, the brain stem portion of medial vestibular nuclear neuron was obtained by micropunching. The dissociated neurons were transferred to a recording chamber mounted on an inverted microscope, and spontaneous action...
179.

Modulation of Large Conductance Ca2+-activated K+ Channel of Skin Fibroblast (CRL-1474) by Cyclic Nucleotides

JihyunYun, SeungtaeKim, HyoweonBang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 4 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.2 9 131-134 (4 pages)

JihyunYun, SeungtaeKim, HyoweonBang 저
...
- 1,500원
we found Iberiotoxin- and TEA-sensitive outward rectifying oscillatory current with whole-cell recordings. Single channel analysis showed large conductance K⁢ channels (106 pS of chord conductance at ⁢40 mV in physiological K⁢ gradient). The 106 pS channels were activated by membrane potential and [Ca2⁢]i, consistent with the known properties of BKCa channels. BKCa channels in CRL-1474 were positively regulated by adenylate cyclase activator (10μM forskolin), 8-Br-cyclic...
180.

TASK-1 Channel Promotes Hydrogen Peroxide Induced Apoptosis

JihyunYun, SeungtaeKim, HyoweonBang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.1 9 63-67 (5 pages)

JihyunYun, SeungtaeKim, HyoweonBang 저
...
- 1,500원
and cytotoxicity assay was preformed using cell counting kit-8 (CCK-8). Cell survival rates were calculated using the cytotoxicity assay data and dose-response curve was fitted to the H2O2 concentration. Ionic currents were recorded in cell-attached mode. The bath solution was the normal Ringer solution and the pipette solution was high K⁢ solution. In HEK-293 cells expressing TREK-1, TREK-2, TASK-3, H2O2 induced cell death did not change in comparison to non-transfected HEK-293. In HEK-29...

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