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61.

5-Hydroxytryptamine Generates Tonic Inward Currents on Pacemaker Activity of Interstitial Cells of Cajal from Mouse Small Intestine

PawanKumarShahi, SeokChoi, DongChuanZuo, CheolHoYeum, PyungJinYoon, JunLee, YoungDaeKim, ChanGukPark, ManYooKim, HyeRangShin, HyunJungOh, J 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.3 2 129-135 (7 pages)

PawanKumarShahi, SeokChoi, DongChuanZuo, CheolHoYeum, PyungJinYoon, JunLee, YoungDaeKim, ChanGukPark, ManYooKim, HyeRangShin, HyunJungOh, J 저
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- 3,000원
In this study we determined whether or not 5-hydroxytryptamine (5-HT) has an effect on the pacemaker activities of interstitial cells of Cajal (ICC) from the mouse small intestine. The actions of 5-HT on pacemaker activities were investigated using a whole-cell patch-clamp technique, intracellular Ca2＋ ([Ca2＋]i) analysis, and RT-PCR in ICC. Exogenously-treated 5-HT showed tonic inward currents on pacemaker currents in ICC under the voltage-clamp mode in a dose-dependent manner. Based on RT-PCR...
62.

Regulation of Adenosine-activated GIRK Channels by Gq-coupled Receptors in Mouse Atrial Myocytes

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

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.3 5 145-150 (6 pages)

HanaCho 저
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- 3,000원
the control. Pretreatment of atrial myocytes with phenylephrine, endothelin-1, or bradykinin prior to a second application of Ado reduced the amplitude of the second IK(Ado) to 25.5±11.6%, 30.5±5.6%, and 96.0±2.7%, respectively. The potency of IK(Ado) inhibition by GqPCRs was different with that observed in acetylcholine-activated GIRK currents (IK(ACh)) (endothelin-1＞phenylephrine＞bradykinin). IK(Ado) was almost completely inhibited by 500ՌM of the PIP2 scavenger neomycin, suggesting...
63.

The Inhibitory Effects of Hydrogen Sulfide on Pacemaker Activity of Interstitial Cells of Cajal from Mouse Small Intestine

ShankarPrasadParajuli, SeokChoi, JunLee, YoungDaeKim, ChanGukPark, ManYooKim, HyunIlKim, CheolHoYeum, JaeYeoulJun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.2 4 83-89 (7 pages)

ShankarPrasadParajuli, SeokChoi, JunLee, YoungDaeKim, ChanGukPark, ManYooKim, HyunIlKim, CheolHoYeum, JaeYeoulJun 저
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- 3,000원
In this study, we studied whether hydrogen sulfide (H2S) has an effect on the pacemaker activity of interstitial cells of Cajal (ICC), in the small intestine of mice. The actions of H2S on pacemaker activity were investigated using whole-cell patch-clamp technique, intracellular Ca2＋ analysis at 30oC and RT-PCR in cultured mouse intestinal ICC. Exogenously applied sodium hydrogen sulfide (NaHS), a donor of hydrogen sulfide, caused a slight tonic inward current on pacemaker activity in ICC at...
64.

Voltage-dependent Ca2＋ Current Identified in Freshly Isolated Interstitial Cells of Cajal (ICC) of Guinea-pig Stomach

YoungChulKim, HikaruSuzuki, Wen-XieXu, HikaruHashitani, WoongChoi, Hyo-YungYun, Seon-MeePark6, SeiJinYoun6, Sang-JeonLee, SangJinLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.6 6 323-330 (8 pages)

YoungChulKim, HikaruSuzuki, Wen-XieXu, HikaruHashitani, WoongChoi, Hyo-YungYun, Seon-MeePark6, SeiJinYoun6, Sang-JeonLee, SangJinLee 저
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- 3,000원
The properties of voltage dependent Ca2＋ current (VDCC) were investigated in interstitial cells of Cajal (ICC) distributed in the myenteric layer (ICC-MY) of guinea-pig antrum. In tissue, ICC-MY showed c-Kit positive reactions and produced driving potentials with the amplitude and frequency of about 62 mV and 2 times min−1, respectively, in the presence of 1</SUP>ՌM nifedipine. Single ICC-MY isolated by enzyme treatment also showed c-Kit immunohistochemical reactivity. These...
65.

Relaxant Effect of Spermidine on Acethylcholine and High K+- induced Gastric Contractions of Guinea-Pig

YoungChulKim, JaeHoonSim, Woong-Choi, ChanHyungKim, Ra-YoungYou, Wen-XieXu, SangJinLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.2 4 59-64 (6 pages)

YoungChulKim, JaeHoonSim, Woong-Choi, ChanHyungKim, Ra-YoungYou, Wen-XieXu, SangJinLee 저
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- 3,000원
of the control (p＜0.05), and inhibitory effect of spermidine on IBa was also observed at a wide range of test potential in current/voltage (I/V) relationship. Pre- and post-application of spermidine (5 mM) also significantly inhibited carbachol (CCh) and ACh-induced initial and phasic contractions. Finally, caffeine (10 mM)-induced contraction which is activated by Ca2+-induced Ca2+ release (CICR),` was also inhibited by pretreatment of spermidine (5 mM). These findings suggest that spermidine...
66.

Effects of Apigenin on Glutamate-induced [Ca2+]i Increases in Cultured Rat Hippocampal Neurons

Ji-HwaHan, KiJungKim, Hyun-JongJang, JuHoJang, Myung-JunKim, KiWugSung, Duck-JooRhie, Yang-HyeokJo, SangJuneHahn, Mun-YongLee, ShinHeeYoon 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.2 2 43-50 (8 pages)

Ji-HwaHan, KiJungKim, Hyun-JongJang, JuHoJang, Myung-JunKim, KiWugSung, Duck-JooRhie, Yang-HyeokJo, SangJuneHahn, Mun-YongLee, ShinHeeYoon 저
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- 3,000원
Flavonoids have been shown to affect calcium signaling in neurons. However, there are no reports on the effect of apigenin on glutamate-induced calcium signaling in neurons. We investigated whether apigenin affects glutamate-induced increase of free intracellular Ca2+ concentration ([Ca2+]i) in cultured rat hippocampal neurons, using fura-2-based digital calcium imaging and microfluorimetry. The hippocampal neurons were used between 10 and 13 days in culture from embryonic day 18 rats....
67.

Involvement of Thromboxane A2 in the Modulation of Pacemaker Activity of Interstitial Cells of Cajal of Mouse Intestine

JinHoKim, SooJinChoi, CheolHoYeum, PyungJinYoon, SeokChoi, JaeYeoulJun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.1 4 25-30 (6 pages)

JinHoKim, SooJinChoi, CheolHoYeum, PyungJinYoon, SeokChoi, JaeYeoulJun 저
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- 3,000원
Although many studies show that thromboxane A2 (TXA2) has the action of gastrointestinal (GI) motility using GI muscle cells and tissue, there are no reports on the effects of TXA2 on interstitial cells of Cajal (ICC) that function as pacemaker cells in GI tract. So, we studied the modulation of pacemaker activities by TXA2 in ICC with whole cell patch-clamp technique. Externally applied TXA2 (5ՌM) produced membrane depolarization in current-clamp mode and increased tonic inward pacemaker...
68.

Ca2+-dependent Long-term Inactivation of Cardiac Na+/Ca2+ Exchanger

Jee-EunLee, TongMookKang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2007, Vol.11 No.5 4 183-188 (6 pages)

Jee-EunLee, TongMookKang 저
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- 3,000원
Using BHK cells with stable expression of cardiac Na+/Ca2+ exchanger (BHK-NCX1), reverse mode (i.e. Ca2+ influx mode) of NCX1 current was recorded by whole-cell patch clamp. Repeated stimulation of reverse NCX1 produced a cytosolic Ca2+-dependent long-term inactivation of the exchanger activity. The degrees of inactivation correlated with NCX1 densities of the cells and were attenuated by reduced Ca2+ influx via the reverse exchanger. The inactivation of NCX1 was attenuated by (i) inhibition of...
69.

Inhibition of Pacemaker Activity of Interstitial Cells of Cajal by Hydrogen Peroxide via Activating ATP-sensitive K+ Channels

SeokChoi, ShankarPrasadParajuli, HyeonSookCheong, DilliParasadPaudyal, CheolHoYeum, PyungJinYoon, JaeYeoulJun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2007, Vol.11 No.1 3 15-20 (6 pages)

SeokChoi, ShankarPrasadParajuli, HyeonSookCheong, DilliParasadPaudyal, CheolHoYeum, PyungJinYoon, JaeYeoulJun 저
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- 3,000원
To investigate whether hydrogen peroxide (H2O2) affects intestinal motility, pacemaker currents and membrane potential were recorded in cultured interstitial cells of Cajal (ICC) from murine small intestine by using a whole-cell patch clamp. In whole cell patch technique at 30oC, ICC generated spontaneous pacemaker potential under current clamp mode (I=0) and inward currents (pacemaker currents) under voltage clamp mode at a holding potential of ⁣70 mV. When ICC were treated with H2O2 in...
70.

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
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- 3,000원
Employing electrophysiological and cell proliferation assay techniques, we studied the effects of Ca2⁢- activated K⁢ channel modulators on the proliferation of human dermal fibroblasts, which is important in wound healing. Macroscopic voltage-dependent outward K⁢ currents were found at about ⁣40 mV stepped from a holding potential of ⁣70 mV. The amplitude of K⁢ current was increased by NS1619, a specific large-conductance Ca2⁢-activated K⁢ (BK)...

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