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본문검색 결과만 보기
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Bile Acid Inhibition of N-type Calcium Channel Currents from Sympathetic Ganglion Neurons
HyeKyungLee, KyoungHwaLee, Eui-SicCho 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.1 4 25-30 (6 pages)
the control recorded without CA. Other single channel properties including slope conductance, single channel current amplitude, open and shut times were not significantly affected by CA being present. The results suggest that CA could modulate N-type Ca2＋ channel gating at a concentration as low as 10－6 M. Bile acids have been shown to activate nonselective cation conductance and depolarize the cell membrane. Under pathological conditions with increased circulating bile acids, CA suppression... -
Quercetin-induced Growth Inhibition in Human Bladder Cancer Cells Is Associated with an Increase in Ca2＋-activated K＋ Channels
YangmiKim, Wun-JaeKim, , Eun-JongCha 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.5 5 279-284 (6 pages)
on ion channel modulation is poorly understood in bladder cancer 253J cells. In this study, we demonstrated that large conductance Ca2＋- activated K＋ (BKCa) or MaxiK channels were functionally expressed in 253J cells, and quercetin increased BKCa current in a concentration dependent and reversible manner using a whole cell patch configuration. The half maximal activation concentration (IC50) of quercetin was 45.5±7.2ՌM. The quercetin-evoked BKCa current was inhibited by tetraethylammoni... -
Direct Block of Cloned K+ Channels, Kv1.5 and Kv1.3, by Cyclosporin A, Independent of Calcineurin Inhibition
BokHeeChoi, SangJuneHahn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.6 7 353-362 (10 pages)
The interaction of cyclosporine A (CsA), an immunosuppressant, with rat brain Kv1.5 (Kv1.5) channels, which were stably expressed in Chinese hamster ovary cells, was investigated using the whole-cell patch-clamp technique. CsA reversibly blocked Kv1.5 currents at 50 mV in a reversible concentration- dependent manner with an apparent IC50 of 1.0μM. Other calcineurin inhibitors (cypermethrin, autoinhibitory peptide) had no effect on Kv1.5 and did not prevent the inhibitory effect of CsA.... -
Nitric Oxide (NO) Inhibites the Neuronal Activities in the Rat Nucleus Tractus Solitarius
MiWonKim, MunSungPark, SunYoulRyu, JiYeonJung, YeonJinJeong, Sun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2004, Vol.8 No.1 2 7-15 (9 pages)
in input resistance. The hyperpolarization caused by SNAP or SNP increased the time to initiate the first action potential, and decreased the number of action potentials elicited by current injection. SNP or SNAP also markedly decreased the number of firing neural discharges of the spontaneous NTS neural activity under zero current. Superfusion of L-NAME, a NOS inhibitor, slightly depolarized the membrane potential and increased the firing rate of NTS neurons induced by current injection. ODQ, a... -
Intrinsic Gating in Inward Rectifier Potassium Channels (Kir2.1) with Low Polyamine Affinity Generated by Site Directed Mutagenesis
ISo, , IAshmole, HSoh, CSPark, PJSpencer, MLeyl, PRStanfield, 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 12 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.3 3 131-142 (12 pages)
polyamines. Though the unitary current-voltage relation shows some inward rectification, it is insufficient to account for that seen under whole cell recording. Channels open and shut under single channel recording, and changes of Popen appear to generate inward rectification. In D172H, the reduction in affinity for spermine is greater when His is protonated at low pHi. The effective valency for spermine is reduced from 3.09⁑0.07 in wild type to 1.95⁑0.09 in D172H at pHi 6.3. In the... -
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... -
Activation of ATP-sensitive Potassium Channels by the Predominant Metabolite of Isoflurane in Rabbit Ventricular Myocytes
JinHan, NariKim, EuiyongKim, SungjuKim, KangheeCho 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 11 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.2 7 165-175 (11 pages)
Background: Recent in vivo experimental evidence suggests that isoflurane-induced cardioprotection may involve KATP channel activation. However, it was demonstrated that isoflurane inhibited KATP channel activities in the inside-out patch mode. To explain this discrepancy, the present investigation tested the hypothesis that a metabolite of isoflurane, trifluoroacetic acid (TFA), contributes to isoflurnae-induced cardioprotection via KATP channel activation during myocardial ischemia and... -
Effect of K+-channel Blockers on the Muscarinic- and A1-adenosine- Receptor Coupled Regulation of Electrically Evoked Acetylcholine Release in the Rat Hippocampus
ByungSikYu, DoKyungKim, BongKyuChoi 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.2 2 147-154 (8 pages)
It was attempted to clarify the participation of K+-channels in the post-receptor mechanisms of the muscarinic and A1-adenosine receptor- mediated control of acetylcholine (ACh) release in the present study. Slices from the rat hippocampus were equilibrated with [3H]choline and the release of the labelled products was evoked by electrical stimulation (3 Hz, 5 V/cm, 2 ms, rectangular pulses), and the influence of various agents on the evoked tritium-outflow was investigated. Oxotremorine (Oxo,... -
暴力媒體에 의한 非行行動의 構造模型開發
김헌수, 김현실 대한신경정신의학회 신경정신의학 16 Pages
대한신경정신의학회 신경정신의학 1998, 제 37권 제 3호 6 467-482 (16 pages)
연구목적：청소년의 비행행동을 설명, 예측하기 위하여 복합연합이론(differential association theory), 사회학 습이론(social learning theory) 및 문제행동이론(problem behavior theory)을 근거로 폭력매체와 비행행동 간의 관계를 설명해주는 가설적 모형을 제시하고 이를 검정하여 수정모형을 구축한 후 비행행동에 영향을 미치는 제변수들의 효과를 검정하였다. 방 법：표본추출방법은 지역(서울-지방) 및 조사기관의 유형(중학교, 고등학교, 소년원, 분류심사원)을 함께 고려한 비례층화표본추출법을 적용하였으며 총연구대상자는...
