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H2 Receptor-Mediated Relaxation of Circular Smooth Muscle in Human Gastric Corpus: the Role of Nitric Oxide (NO)
SangEokLee, DaeHoonKim, YoungChulKim, Joung-HoHan, WoongChoi, ChanHyungKim, HyeWonJeong, Seon-MeePark, SeiJinYun, Song-YiChoi6, RohyunSung 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2014, Vol.18 No.5 11 425-430 (6 pages)
no effect. However, NG-nitro-L-arginine methyl ester (L-NAME) and 1H-(1,2,4)oxadiazolo (4,3-A) quinoxalin-1-one (ODQ), an inhibitor of soluble guanylate cyclase (sGC), did inhibit histamine-induced tonic relaxation. In particular, histamine-induced tonic relaxation was converted to tonic contraction by pretreatment with L-NAME. Ranitidine, the H2 receptor blocker, inhibited histamine-induced tonic relaxation. These findings suggest that histamine produced relaxation in circular smooth muscle of... -
Disappearance of Hypoxic Pulmonary Vasoconstriction and O2-Sen-sitive Nonselective Cationic Current in Arterial Myocytes of Rats Under Ambient Hypoxia
HaeYoungYoo, SungJoonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.5 13 463-468 (6 pages)
been studied. Here we investigate the effects of 2d-H on HPV in isolated ventilated/perfused lungs (V/P lungs) from rats. HPV was almost abolished without structural remodeling of PA in 2d-H rats, and the lost HPV was not recovered by Kv inhibitor, 4-aminopyridine. Patch clamp study showed that the hypoxic inhibition of Kv current in PASMC was similar between 2d-H and control. In contrast, hypoxia and TXA2-activated INSC was not observed in PASMCs of 2d-H. From above results, it is suggested th... -
Mechanism of Relaxation Via TASK-2 Channels in Uterine Circular Muscle of Mouse
SeungHwaHong, RohyunSung, YoungChulKim, HikaruSuzuki, WoongChoi, YeonJinPark, IllWoonJi, ChanHyungKim, SunChulMyung6, MooYeolLee, TongMook 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.4 14 359-365 (7 pages)
in uterine circular muscle of mouse. Furthermore, contractility was significantly increased in pregnant uterine circular muscle than that of non-pregnant muscle. These patterns were not changed even in the presence of tetraetylammonium (TEA) and 4-aminopyridine (4-AP). Finally, TASK-2 inhibitors induced strong myometrial contraction even in the presence of L-methionine, a known inhibitor of stretch- activated channels in myometrium. When compared to non-pregnant myometrium, pregnant myometrium... -
Influence of Aspirin on Pilocarpine-Induced Epilepsy in Mice
KyoungHoonJeong, JooYounKim, Yun-SikChoi, Mun-YongLee, SeongYunKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.1 3 15-21 (7 pages)
Aspirin (acetylsalicylic acid) is one of the most widely used therapeutic agents based on its pharmacological actions, including anti-inflammatory, analgesic, anti-pyretic, and anti-thrombotic effects. In this study, we investigated the effects of aspirin on seizure susceptibility and hippocampal neuropathology following pilocarpine-induced status epilepticus (SE). SE was induced by pilocarpine hydrochloride (280 mg/kg, i.p.) administration in C57BL/6 mice (aged 8 weeks). Aspirin was... -
Requirement of Pretone by Thromboxane A2 for Hypoxic Pulmonary Vasoconstriction in Precision-cut Lung Slices of Rat
SuJungPark, HaeYoungYoo, HyeJinKim, , , JinKyoungKim, Yin-HuaZhang, SungJoonKim, 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.1 9 59-64 (6 pages)
(4AP and TEA) required U46619- pretone to induce significant contraction of PA in PCLS. In contrast, the airways in PCLS showed reversible contraction in response to the K＋ channel blockers without pretone conditioning. Also, the airways showed no hypoxic constriction but a relaxation under the partial pretone by U46619. The airways in PCLS showed reliable, concentration-dependent contraction by metacholine (EC50, ∼210 nM). In summary, the HPV in PCLS is more similar to isolated PA than V/P... -
Nitric Oxide-mediated Relaxation by High K＋ in Human Gastric Longitudinal Smooth Muscle
YoungChulKim, WoongChoi, Hyo-YoungYun, RohyunSung, RaYoungYoo, Seon-MeePark, SeiJinYun, Mi-JungKim, Young-JinSong, Wen-XieXu, SangJinLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.6 12 405-414 (10 pages)
no effect. However, N(G)-nitro-L-arginine (L-NNA) and 1H-(1,2,4) oxadiazolo (4,3-A) quinoxalin-1-one (ODQ), an inhibitor of soluble guanylate cyclase (sGC) and 4-AP (4-aminopyridine), voltage-dependent K＋ channel (KV) blocker, inhibited high K＋-induced relaxation, hence reversing to tonic contraction. High K＋-induced relaxation was observed in gastric corpus of human stomach, but only in the longitudinal muscles from greater curvature not lesser curvature. L-NNA, ODQ and KV channel blocker... -
A Computational Model of the Temperature-dependent Changes in Firing Patterns in Aplysia Neurons
NamGyuHyun, Kwang-HoHyun, Kwang-BeomHyun, Jin-HeeHan, KyungminLee, Bong-KiunKaang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 12 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.6 8 371-382 (12 pages)
We performed experiments using Aplysia neurons to identify the mechanism underlying the changes in the firing patterns in response to temperature changes. When the temperature was gradually increased from 11oC to 31oC the firing patterns changed sequentially from the silent state to beating, doublets, beating-chaos, bursting-chaos, square-wave bursting, and bursting-oscillation patterns. When the temperature was decreased over the same temperature range, these sequential changes in the firing... -
Modulation of Presynaptic GABA Release by Oxidative Stress in Mechanically-isolated Rat Cerebral Cortical Neurons
Eu-TeumHahm, Jung-WooSeo, JinyoungHur, Young-WukCho 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.3 2 127-132 (6 pages)
Reactive oxygen species (ROS), which include hydrogen peroxide (H2O2), the superoxide anion (O2−·), and the hydroxyl radical (OH·), are generated as by-products of oxidative metabolism in cells. The cerebral cortex has been found to be particularly vulnerable to production of ROS associated with conditions such as ischemia-reperfusion, Parkinson's disease, and aging. To investigate the effect of ROS on inhibitory GABAergic synaptic transmission, we examined the electrophysiological... -
Characterization of ETB Receptor-mediated Relaxation in Precontracted Mesenteric Artery from Streptozotocin-induced Diabetic Rats
YangKiEom, KoanHoiKim, ByungYongRhim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.5 8 305-313 (9 pages)
Diabetes mellitus is associated with vascular complications, including an impairment of vascular function and alterations in the reactivity of blood vessels to vasoactive substances in various vasculature. In the present study, the authors have observed endothelin-B (ETB) receptor agonist-induced relaxation in precontracted mesenteric arterial segments from streptozotocin (STZ)-induced diabetic rats, which was not shown from control rats or in other arterial segments from diabetic rats.... -
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)
Interstitial cells of Cajal (ICCs) are the pacemaker cells that generate slow waves in the gastrointestinal (GI) tract. In the present study, we investigated the effect of mitochondrial ATP-sensitive potassium (mitoKATP) channel on pacemaking activity in cultured ICCs from murine small intestine by 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...
