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The Effect of Carbon Monoxide on L-type Calcium Channel Currents in Human Intestinal Smooth Muscle Cells
InjaLim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.6 10 357-362 (6 pages)
to determine if the effects of CO on L-calcium channels were also mediated through NO, cells were incubated with NG-nitro-L-arginine (L-NNA, 1 mM), a nitric oxide synthase inhibitor. After L-NNA pretreatment, 0.2 % CO did not increase barium current (4⁑2% increase, n=6, p＞0.05). NO donor, SNAP (20μM) increased barium current by 13⁑2% (n=6, p＜0.05) in human jejunal smooth muscle cells. These data suggest that CO activates L-type calcium channels through NO/cGMP dependant mechanism. -
Antagonists of NMDA Receptor, Calcium Channel and Protein Kinase C Potentiate Inhibitory Action of Morphine on Responses of Rat Dorsal Horn Neuron
HongKeeShin, YeonSukKim, JongHunJun, SeoEunLee, JaeHwaKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 4 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.5 1 251-254 (4 pages)
The present study was designed to examine whether the co-application of morphine with Ca2 channel antagonist (Mn2, verapamil), N-methyl-D-aspartate (NMDA) receptor antagonist (2-amino-5-phosphonopentanoic acid[AP5], Mg2) or protein kinase C inhibitor (H-7) causes the potentiation of morphine- induced antinociceptive action by using an in vivo electrophysiological technique. A single iontophoretic application of morphine or an antagonist alone induced weak inhibition of wide... -
Involvement of NMDA Receptor and L-type Calcium Channel in the Excitatory Action of Morphine
BonSeopKoo, HongKeeShin, SukHanKang, JongHunJun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2002, Vol.6 No.5 2 241-246 (6 pages)
low threshold cells. Morphine-induced excitatory effect at low ejection current was naloxone-reversible and reversed to an inhibitory action at high ejection current. NMDA receptor, calcium channel and intracellular Ca2 antagonists strongly antagonized the morphine-induced excitatory effect. These results suggest that changes in intracellular ionic concentration, especially Ca2, play an important role in the induction of excitatory effect of morphine in the rat dorsal horn neurons. -
Nimodipine as a Potential Pharmacological Tool for Characterizing R-Type Calcium Currents
SeogBaeOh 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.6 8 511-519 (9 pages)
Ca currents, blocked high-voltage-activated calcium channel currents by ∼38%. Interestingly, high concentrations of nimodipine (＞10μM) further reduced the "residual" currents in DRG neurons from α1E knock-out mice, after blocking L-, N- and P/Q-type Ca currents with 10μM nimodipine, 1μM ω-conotoxin GVIA and 200 nM ω-agatoxin IVA, indicating inhibitory effects of nimodipine on R-type Ca currents. Nimodipine (＞10μM) also produced the inhibition of both low-voltage-activated... -
DAMGO, a μ-Opioid Agonist and Cholecystokinin-Octapeptide Have Dual Modulatory Effects on Capsaicin-Activated Current in Rat Dorsal Root Ganglion Neurons
Su-YongEun, JimokKim, JihyeLee, SungJunJung, JooMinPark, YunKyungPark, DongkwanKim, SangJeongKim, JiyeonKwak, JunKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.1 10 71-78 (8 pages)
when applied cutaneously and intradermally. Activation of capsaicin-gated channel in C-type dorsal root ganglion (DRG) neurons produces nonselective cationic currents. Although electrophysiological and biochemical properties of capsaicin-activated current (ICAP) were studied, the regulatory mechanism and intracellular signaling pathway are still unclear. In the present study, we investigated the modulations of ICAP by DAMGO (μ-opioid agonist) and cholecystokinin octapeptide (CCK-8). In 18 out ... -
Altered Delayed Rectifier K+ Current of Rabbit Coronary Arterial Myocytes in Isoproterenol-Induced Hypertrophy
NariKim, JinHan, EuiyongKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.1 5 33-40 (8 pages)
to compare the properties of coronary KDR channels in normal and hypertrophied hearts. These channels were measured from rabbit coronary smooth muscle cells using a patch clamp technique. The main findings of the study are as follows: (1) the KDR current density was decreased without changes of the channel kinetics in isoproterenol-induced hypertrophy; (2) the sensitivity of coronary KDR channels to 4-AP was increased in isoproterenol-induced hypertrophy. From the above results, we suggest for... -
N-Type Calcium Channels
KeithS.Elmslie 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.6 12 525-530 (6 pages)
of the different calcium channels have similar kinetic properties. This review uses the N-type calcium channel to illustrate the difficulties in identifying and characterizing calcium channels in neurons. It shows that the discovery of toxins that can specifically block single calcium channel types has made it possible to easily and rapidly discern the physiological roles of the different calcium channels in the neuron. Without these toxins it is unlikely that progress would have been as rapid. -
Relatoinship between Sarcoplasmic Reticular Calcium Release and Na+-Ca2+ Exchange in the Rat Myocardial Contraction
Eun-GiKim, SoonJinKim, ChangMannKo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 14 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.3 4 197-210 (14 pages)
after 0 Na-0 Ca application by 53⁑3%. Caffeine increased this inward current by 44⁑3% in spite of 14 mM EGTA. Finally, the Na current-dependent fraction of the inward current was increased in a stimulation frequency-dependent manner. From these results, it is concluded that the Ca2 exit-mode (forward-mode) Na-Ca2 exchange suppresses the LA tension by extruding Ca2 out of the cell right after its release from sarcoplasmic reticulum (SR) in a... -
Effect of Capsaicin on Delayed Rectifier K+ Current in Adult Rat Dorsal Root Ganglion Neurons
JunghyunHahn, SungkwonChung, HyoweonBang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.1 2 9-14 (6 pages)
the delayed rectifier K current in cultured small diameter DRG neurons of adult rat. Capsaicin reduced the amplitude of K current in dose dependent manner, and the concentration-dependence curve was well described by the Hill equation with KD value of 19.1μM. The blocking effect of capsaicin was reversible. Capsaicin (10 μM) shifted the steady- state inactivation curve in the hyperpolarizing direction by about 15 mV and increased the rate of inactivation. The voltage dependence... -
Effects of Bradykinin on Intracellular Calcium Transients in Cardiac Myocytes
Choon-OkPark, YangMiKim, JaeHeeHan, DavidG.Allen, SeongGeunHong 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.6 10 615-621 (7 pages)
ionic currents using whole cell voltage clamp technique in rabbit cardiomyocytes and on the intracellular Ca2 transient using calcium sensitive fluorescence dye, indo-1AM. Simultaneously with recording intracellular Ca2 transients, cell contractility was estimated from the changes in length of the electrical stimulated rat cardiac myocytes. L-type Ca2 current decreased by bradykinin at the entire voltage range. Inward tail current increased initially up to its maximum about...
