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Role of Stretch-Activated Channels in Stretch-Induced Changes of Electrical Activity
JaeBoumYoum, Su-HyunJo, ChaeHunLeem, Won-KyungHo, YungE. 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2004, Vol.8 No.1 6 33-41 (9 pages)
We developed a cardiac cell model to explain the phenomenon of mechano-electric feedback (MEF), based on the experimental data with rat atrial myocytes. It incorporated the activity of ion channels, pumps, exchangers, and changes of intracellular ion concentration. Changes in membrane excitability and Ca2 transients could then be calculated. In the model, the major ion channels responsible for the stretch-induced changes in electrical activity were the stretch-activated channels (SACs).... -
Molecular Aspects of Organic Ion Transporters in the Kidney
SeokHoChaHitoshiEndou 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 16 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.2 1 107-122 (16 pages)
A function of the kidney is elimination of a variety of xenobiotics ingested and wasted endogenous compounds from the body. Organic anion and cation transport systems play important roles to protect the body from harmful substances. The renal proximal tubule is the primary site of carrier-mediated transport from blood into urine. During the last decade, molecular cloning has identified several families of multispecific organic anion and cation transporters, such as organic anion transporter... -
Pharmacological Characterization of Synthetic Tetrahydroisoquinoline Alkaloids, YS 51 and YS 55, on the Cardiovascular System
Ki-ChurlChang, Young-JinKang, Young-SooLee, Won-SeogChong, Hye-SookYun-Choi, Duck-HyongLee, Jae-ChunRyu 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.4 8 461-469 (9 pages)
increased contractile force about 4- and 8- fold over the control, respectively, along with the concentration-dependent increment of cytosolic Ca2 ions. While, 10 ㄍM YS 55 reduced the contractile force about 50 % over the control and lowered the cytosolic Ca2 level, in rat brain homogenates, YS 51 and YS 55 displaced [3H]prazosin binding competitively with Ki 0.15 and 0.12 ㄍM, respectively. However, both probes were ineffective on [3H]nitrendipine binding. Therefore,... -
Pharmacological Action Mechanism(s) of Vasodilator Effect of Calcitonin Gene-related Peptide in Rat Basilar Arteries
임병용(Byung Yong Rhim), 홍선화(Sun Hwa Hong), 김치대(Chi Dae Kim), 이원석(Won Suk Lee), 김동헌(Dong Heon Kim), 홍기환(Ki Whan Hong) 대한약리학회 대한약리학잡지 12 Pages
대한약리학회 대한약리학잡지 1996, 제 32권 제 1호 5 39-50 (12 pages)
in association with force development of the rat basilar arteries during activation byK+ depolarizing solution and U46619, a thromboxane analogue, in the absence and the presence of calcitonin-gent related peptide (CGRP). CGRP (30 and 100 nM) caused a concentration-dependent inhibition of U46619-induced contraction with decrease in [Ca2+]i, whereas it did not exert any effect on the K+ (90 mM)-induced contraction and increase in [Ca2+]i, Further, [Ca2+]i-force relationships were determined by... -
갑상선 기능 항진 기니픽 심근에서 α1-Adrenergic 수용체 자극이 막전위, 수축력 및 세포내 Na+과 H+ 활성도에 미치는 영향
김진상(Jin-Sang Kim), 채수완(Soo-Wan Chae), 조규박(Kyu-Park Cho) 대한약리학회 대한약리학잡지 14 Pages
대한약리학회 대한약리학잡지 1995, 제 31권 제 1호 5 39-52 (14 pages)
갑상선 기능 항진증 심장에서의 β-adrenoceptor의 역할은 잘 알려져 있으나 α-adrenoceptor에 대해서는 알려져 있지 않은 바, 저자 등은 갑상선 기능 항진증 기니픽 심장의 유두근에서 일반 미세 전극과 이온-선택적 미세 전극을 이용하여 세포내 Na+과 H+ 활성도에 대한 phenylephrine의 영향을 연구하였다. Phenylephrine (10-5 또는 3 × 10-5M)에 의한 α1-Adrenoceptor 자극은 다양한 활동전위의 변동, 수축기 막전위의 과분극 (1.5 ± 0.1mM), 세포내 활성도 증가 (0.4 ± 0.15mM), 현저한 수축력 증가 (220 ± 15%) 그리고... -
Forskolin의 흰쥐적출관류부신으로 부터 Ach, Excess K+, DMPP, McN-A-343에 의한 Catecholamine 분비효과의 증강작용
임동윤(Dong-Yoon Lim), 김원식(Won-Shik Kim), 최철희(Cheol-Hee Choi) 대한약리학회 대한약리학잡지 16 Pages
대한약리학회 대한약리학잡지 1991, 제 27권 제 2호 9 167-182 (16 pages)
Adenylate cyclase 효소를 활성화시키는 약물인 Forskolin의 흰쥐 적출관류 부신으로부터 Ach, excess K+, McN-A-343 및 caffein에 의한 catecholamines (CA) 분비작용에 대한 영향을 검색하고, 그 기전을 규명코자 연구를 시행하여 다음과 같은 연구결과를 얻었다. Forskolin (1.0 uM)은 흰쥐 부신적출정맥내로 1분동안 관류시킨 후 Ach(50 ug), excess K+(56 mM), DMPP (100 uM) 및 caffeine (0.3 mM)에 의한 CA 분비작용을 현저히 증강시켰으나 McN-A-343에 의한 CA분비작용에는 영향을 미치지 않았다. Forskolin 자체는 CA분비작용을... -
Lidocaine에 의해 억제된 심근수축력에 대한 Fructose의 영향
고계창(Kye-Chang KO), 손치동(Chi-Dong Sohn), 정지창(Jee-Chang Jung) 대한약리학회 대한약리학잡지 9 Pages
대한약리학회 대한약리학잡지 1986, 제 22권 제 1호 5 51-59 (9 pages)
Lidocaine의 심근수축력 억제 작용에 관한 기전연구 일환으로 lidocaine에 의해 수축력이 감소된 흰쥐 적출심방에 대한 fructose의 효과를 검토하였다. Fructose는 기질제거에 의해 감소된 적출심방의 수축력을 현저히 증가시켰으며, 30mM에서 최대 증가효과를 나타냈다. Krebs-Ringer glucose용액에 현수한 적출심방의 수축력은 0.1mM lidocaine에 의해 약 50%의 감소를 나타냈으며, 30mM fructose의 투여는 이 감소된 수축력을 현저히 증가 시켰다. Lidocaine 억제심방에 대한 fructose의 실험 성적은 pyruvate나 acetate에서 얻은... -
Effect of Preconditioning Ischemia on Endothelial Dysfunction Produced by Ischemia-Reperfusion in Rabbit Coronary Artery
Suh, Suk-Hyo, Park, Yee-Tae, Kim, Woong-Heum, Kim, Ki-Whan 대한생리학회 대한생리학회지 10 Pages
대한생리학회 대한생리학회지 1995, 제 29권 제 1호 5 51-60 (10 pages)
of normal left anterior descending coronary artery were prepared and suspended for isometric force measurement in organ chambers containing Krebs Ringer bicarbonate solution. The rings were contracted with 29.6 mM KCI. Ischemia alone did not attenuate endothelium-dependent relaxation by acetylcholine. However, ischemia-reperfusion significantly impaired endothelium-dependent relaxation. Endothelium-independent relaxation by sodium nitroprusside was not impaired by ischemia-reperfusion and the... -
Role of Na+Ca2+ Exchange in the Control of Contractility in Rabbit Basilar Arterial Smooth Muscle
Kim Eui-Yong, Han Jin 대한생리학회 대한생리학회지 10 Pages
대한생리학회 대한생리학회지 1994, 제 28권 제 2호 6 159-168 (10 pages)
The contraction of rabbit basilar artery was examined as a function of changes in the Na+ electrochemical gradient in order to determine the contribution of Na+/Ca2+ exchange to the modulation of contractility. Ouabain (10-5 M) or K+-free Tyrode solution caused an increase in tonic tension even in the presence of a Ca2+ channel blocker (10-6 M verapamil) and an α-receptor blocker (10-5 M phentolamine). After treatment with ouabain (10-5 M), contractions were augmented by reduction of external... -
Effects of the Endothelium on the Contractile Responses to Norepinephrine in Isolated Proximal and Distal Coronary Artery of Pigs
Kim, Jong-Hoon, Jeon, Byeong-Hwa, Chang, Seok-Jong, Park, Hae-Kun 대한생리학회 대한생리학회지 10 Pages
대한생리학회 대한생리학회지 1993, 제 27권 제 1호 3 27-36 (10 pages)
Effects of the endothelium on the contractile responses to norepinephrine (NE) were investigated in isolated helical strips of the proximal and distal coronaries artery of pigs. The helical strips were immersed in Tris-buffered Tyrode s solution equilibrated with 100% O2 at 35℃ and its isometric tension was measured. NE relaxed the strips precontracted with acetylcholine from both the proximal and distal coronary artery. NE-induced relaxation, which might be induced mainly by β-adrenoceptor...
