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271.

Effects of Local Anesthetics on Rotational Mobility of n-(9-Anthroyloxy)stearic Acid in Neuronal Membranes

Hye-OckJang, ChangLee, Min-GakChoi, Sang-HunShin, In-KyoChung, IlYun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.3 1 119-124 (6 pages)

Hye-OckJang, ChangLee, Min-GakChoi, Sang-HunShin, In-KyoChung, IlYun 저
...
- 3,000원
To elucidate the molecular mechanism of pharmacological action of local anesthetics, we studied membrane actions of tetracaine, bupivacaine, lidocaine, prilocaine and procaine. Fluorescence polarization of n-(9-anthroyloxy)stearic acid (n-AS) was used to examine the effects of these local anesthetics on differential rotational mobility of different positions of the number of synaptosomal plasma membrane vesicle (SPMV) phospholipid carbon atoms. The four membrane components differed with respect...
272.

Roles of Nitric Oxide in Vestibular Compensation

Han-SeongJeong, JaeYeoulJun, Jong-SeongPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.2 4 73-77 (5 pages)

Han-SeongJeong, JaeYeoulJun, Jong-SeongPark 저
...
- 1,500원
in a significant increase in spontaneous nystagmus frequency. In addition, SNP increased the frequency of spontaneous action potential in isolated medial vestibular nuclear neurons. Potassium currents of the vestibular nuclear neurons were inhibited by SNP. After blockade of calcium dependent potassium currents by high EGTA (11 mM) in a pipette solution, SNP did not inhibit outward potassium currents. 1H-[1,2,4] oxadiazolo [4,3-a] quinozalin-1-one (ODQ), a specific inhibitor of soluble guanylyl...
273.

Inhibitory and Excitatory Postsynaptic Currents of Medial Vestibular Nucleus Neurons of Rats

SangWooChun, JeongHeeChoi, ByungRimPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.2 2 59-63 (5 pages)

SangWooChun, JeongHeeChoi, ByungRimPark 저
...
- 1,500원
17-day-old rats. The spontaneous inhibitory postsynaptic currents (sIPSCs) were significantly reduced by the GABAA antagonist bicuculline (20μM), but were not affected by the glycine antagonist strychnine (1μM). The frequency, amplitude, and decay time constant of sIPSCs were 4.3⁑0.9 Hz, 18.1⁑2.0 pA, and 8.9⁑0.4 ms, respectively. Spontaneous excitatory postsynaptic currents (sEPSCs) were mediated by non-NMDA and NMDA receptors. The specific AMPA receptor antagonist GYKI-52466...
274.

Effects of Noradrenaline on the Membrane Potential of Prostatic Neuroendocrine Cells of Rat

JunHeeKim, SunYoungShin, Dae-YongUhm, SungJoonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.1 9 47-52 (6 pages)

JunHeeKim, SunYoungShin, Dae-YongUhm, SungJoonKim 저
...
- 3,000원
The prostate gland contains numerous neuroendocrine cells that are believed to influence the function of the prostate gland. Our recent study demonstrated the expression of both α1- and α2-ARs, signaling the release of stored Ca2⁢ and the inhibition of N-type Ca2⁢ channels, respectively, in rat prostate neuroendocrine cells (RPNECs). In this study, the effects of NA on the resting membrane potential (RMP) of RPNECs were investigated using a whole-cell patch clamp method. Fresh...
275.

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)

JinHan, NariKim, DangVanCuong, ChunghuiKim, EuiyongKim 저
...
- 3,000원
on the inhibitory action by ATP, showing that thiol oxidation was not involved in the blocking mechanism of ATP. There were no statistical difference in the single channel conductance for the oxidized and reduced states of the channel. Analysis of the open and closed time distributions showed that DTNB had no effect on open and closed time distributions shorter than 4 ms. On the other hand, DTNB decreased the life time of bursts and increased the interburst interval. N-ethylmaleimide (NEM), a...
276.

Identification of ATP-sensitive K+ Conductances in Male Rat Major Pelvic Ganglion Neurons

Kyu-SangPark, Seung-KyuCha, Keon-IlLee, JaeYeoulJun, Seong-WooJeong, InDeokKong, JoongWooLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2002, Vol.6 No.5 3 247-254 (8 pages)

Kyu-SangPark, Seung-KyuCha, Keon-IlLee, JaeYeoulJun, Seong-WooJeong, InDeokKong, JoongWooLee 저
...
- 3,000원
Major pelvic ganglia (MPG) neurons are classified into sympathetic and parasympathetic neurons according to the electrophysiological properties; membrane capacitance (Cm), expression of T-type Ca2⁢ channels, and the firing patterns during depolarization. In the present study, function and molecular expression of ATP-sensitive K⁢ (KATP) channels was investigated in MPG neurons of male rats. Only in parasympathetic MPG neurons showing phasic firing patterns, hyperpolarizing changes...
277.

Noradrenergic Modulation of Spontaneous Inhibitory Postsynaptic Currents in the Hypothalamic Paraventricular Nucleus

LongHwaLee, WoneeChong, KihoLee, JinBongPark, PanDongRyu 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2002, Vol.6 No.2 2 71-80 (10 pages)

LongHwaLee, WoneeChong, KihoLee, JinBongPark, PanDongRyu 저
...
- 3,000원
to 41⁑7% of the baseline value (4.4⁑0.8 Hz, p＜0.001). This effect was blocked by yohimbine (2∼20μM), an α2-adrenoceptor antagonist and mimicked by clonidine (50μM), an α2-adrenoceptor agonist. In contrast, NE increased sIPSC frequency to 248⁑32% of the control (3.06⁑0.37 Hz, p＜0.001) in 31 of 54 type II neurons, but decreased the frequency to 41⁑7% of the control (5.5⁑1.3 Hz) in the rest of type II neurons (p＜0.001). In both types of PVN neurons, NE...
278.

Muscarine M2 Receptor-mediated Presynaptic Inhibition of GABAergic Transmission in Rat Meynert Neurons

Il-SungJangNorioAkaike 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2002, Vol.6 No.2 1 63-70 (8 pages)

Il-SungJangNorioAkaike 저
...
- 3,000원
a G-protein uncoupler, attenuated the inhibitory action of muscarine on GABAergic mIPSC frequency. Muscarine still could decrease GABAergic mIPSC frequency even in the Ca2⁢-free external solution. However, the inhibitory action of muscarine on GABAergic mIPSCs was completely occluded in the presence of forskolin. The results suggest that muscarine acts presynaptically and reduces the probability of spontaneous GABA release, and that such muscarine-induced inhibitory action seems to be...
279.

Modulation of L-type Ca2+ Channel Currents by Various Protein Kinase Activators and Inhibitors in Rat Clonal Pituitary GH3 Cell Line

YoungMinBae, Hye-JungBaek, HanaCho, YungEEarm, Won-KyungHo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.2 4 139-146 (8 pages)

YoungMinBae, Hye-JungBaek, HanaCho, YungEEarm, Won-KyungHo 저
...
- 3,000원
an adenylate cyclase activator, and isobutyl methylxanthine (IBMX), a non-specific phosphodiesterase inhibitor, reduced Ba2⁢ currents. The above results show that the L-type Ca2⁢ channels are activated by PKC and PTK, and inhibited by elevation of cyclic nucleotides such as cAMP. From these results, it is suggested that the regulation of hormone secretion by various kinase activity in GH3 cells may be attributable, at least in part, to their effect on L-type Ca2⁢ channels.
280.

Relaxant Effect of 4-Aminopyridine on the Mesenteric Artery of Rat

Se-HoonKimTae-ImLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages

대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.6 4 455-461 (7 pages)

Se-HoonKimTae-ImLee 저
...
- 3,000원
It has been well known that 4-aminopyridine (4-AP) has an excitatory effect on vascular smooth muscle due to causing membrane depolarization by blocking K⁢-channel. However, we observed that 4-AP had an inhibitory effect on the mesenteric artery of rat. Therefore, we investigated the mechanism of 4-AP-induced vasorelaxation. The mesenteric arcuate artery and its branches were isolated and cut into ring. The ring segment was immersed in HEPES-buffered solution and its isometric tension was...

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