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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)
Nitric oxide (NO) system has been implicated in a wide range of physiological functions in the nervous system. However, the roleof NO in regulating the neural activity in the gustatory zone of nucleus tractus solitarius (NTS) has not been established. The present study was aimed to investigate the role of NO in the gustatory NTS neurons. Sprague-Dawley rats, weighing about 50 g, were used. Whole cell patch recording and immunohistochemistry were done to determine the electrophysiological... -
Cooperation of Gβ and Gαq Protein in Contractile Response of Cat Lower Esophageal Sphincter (LES)
UyDongSohnTaiSangLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.6 9 349-355 (7 pages)
We previously shown that LES contraction depends on M3 receptors linked to PTX insensitive Gq protein and activation of PLC. This results in production of IP3, which mediates calcium release, and contraction through a CaM dependent pathway. In the esophagus ACh activates M2 receptors linked to PTX sensitive Gi3 protein, resulting in activation of PLD, presumably, production of DAG. We investigated the role of PLC isozymes which can be activated by Gq or Gβ protein on ACh-induced contraction in... -
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)
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 RPNECs were dissociated from the ventral lobe of rat prostate and identified from its characteristic shape; round or oval shape with dark cytoplasm. Under zero-current clamp... -
Effect of PUVA on Nerve Growth Factor Expression in Cultured Keratinocytes
MuHyoungLee, HwiJunKim, JinWooLeeYoungIlKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2002, Vol.6 No.5 7 275-279 (5 pages)
Nerve growth factor (NGF) is an important autocrine growth factor and also a survival factor for keratinocytes. NGF may act in the hyperproliferative condition, psoriasis. Clinically, the combination of psoralen and UVA (PUVA) has been used in the treatment of a wide variety of cutaneous disorders, such as psoriasis and vitiligo. However, the precise therapeutic mechanism of PUVA on the dermatologic diseases remains unclear. The purpose of this study was to examine whether the expression of NGF... -
The Protective Effect of Melatonin Administration against Adriamycin-induced Cardiotoxicity in Rats
JinHan, ChungheeKim, NariKim, JuheePark, YoungchurlYang, EuiyongKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.4 6 333-342 (10 pages)
a Stadie-Riggs microtome for the measurement of malondialdehyde (MDA) content used as an index of lipid peroxidation and lactate dehydrogenase (LDH) release as an indicator of lethal cell injury. Serious adriamycin-induced lethality was observed in rat by a single intraperitoneal injection in a dose-dependent manner. A single injection of adriamycin (25 mg/kg, i.p.) induced a lethality rate of 86%, with melatonin (10 mg/kg s.c. for 6 days) treatment reducing the adriamycin-induced lethality rate... -
The Alteration of Ca2+-activated K+ Channels in Coronary Arterial Smooth Muscle Cells Isolated from Isoproterenol-induced Cardiac Hypertrophy in Rabbit
NariKim, JinHan, EuiyongKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.2 5 147-156 (10 pages)
It has been proposed that Ca2-activated K (KCa) channels play an essential role in vascular tone. The alterations of the properties of coronary KCa channels have not been studied as a possible mechanism for impaired coronary reserve in cardiac hypertrophy. The present studies were carried out to determine the properties of coronary KCa channels in normal and hypertrophied hearts. These channels were measured from rabbit coronary smooth muscle cells using a patch clamp technique.... -
Mechanism of L-NAME-Resistant Endothelium-Dependent Relaxation Induced by Acetylcholine in Rabbit Renal Artery
DongSooYeon, DuckSunAhn, Young-HoLee, SeongChunKwon 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.6 5 463-469 (7 pages)
produced non-NO relaxation that is mediated by an EDHF. The results also suggest that ACh may activate the release of ATP from endothelial cells, which in turn activates P2Y receptor on the endothelial cells. Activation of endothelial P2Y receptors induces a release of EDHF resulting in a vasorelaxation via a mechanism that involves activation of both the voltage-gated K channels and the Ca2-activated K channels. The results further suggest that EDHF does not appear to be a... -
Regulation of the Contraction Induced by Emptying of Intracellular Ca2+ Stores in Cat Gastric Smooth Muscle
Hye-JungBaek, Sang-SooSim, Duck-JooRhie, ShinHeeYoon, SangJuneHahn, Yang-HyeokJo, Myung-SukKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.2 5 113-120 (8 pages)
TMB-8 (intracellular Ca2 release blocker). Both PKC inhibitors (H-7 and staurosporine) and tyrosine kinase inhibitors (genistein and methyl 2,5-dihydroxycinnamic acid) significantly inhibited the contraction, but calmodulin antagonists (W-7 and trifluoperazine) had no inhibitory effect on the contraction. The combined inhibitory effects of protein kinase inhibitors, H-7 and genistein, together with verapamil were greater than that of each one alone. In Ca2 store-emptied condition,... -
The Effect of NO Donor on Contraction, Cytosolic Ca2+ Level and Ionic Currents in Guinea-pig Ileal Smooth Muscle
Seong-ChunKwon, Ki-YoungPark, Duck-SunAhn, Young-HoLee, Bok-SoonKang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.1 5 33-40 (8 pages)
SIN-1 (0.01∼100μM) inhibited 25 mM KCl- or histamine (10μM)-induced contraction in a concentration-dependent manner. SIN-1 reduced both the 25 mM KCl- and the histamine-stimulated increases in muscle tension in parallel with decreased [Ca2]i. Using the patch clamp technique with a holding potential of 60 mV, SIN-1 (10μM) decreased peak Ba currents (IBa) by 30.9⁑5.4% (n=6) when voltage was stepped from 60 mV to 10 mV and this effect was blocked by ODQ (1μM),... -
Different Mechanisms for K+-Induced Relaxation in Various Arteries
SukHyoSuh, SungJinPark, JaiYoungChoi, JaeHoonSim, YoungChulKim, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 11 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.4 6 415-425 (11 pages)
[K]o can be increased under a variety of conditions including subarachnoid hemorrhage. The increase of [K]o in the range of 5∼15 mM may affect tensions of blood vessels and cause relaxation of agonist-induced precontracted vascular smooth muscle (K-induced relaxation). In this study, effect of the increase in extracellular K concentration on the agonist-induced contractions of various arteries including resistant arteries of rabbit was examined, using home-made...
