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Precise Prediction of Optical Performance for Near Infrared Instrument Using Adaptive Fitting Line
Ko. Kyeongyeon, Han. Jeong-Yeol, Nah. Jakyoung, Oh. Heeyoung, Yuk. In-Soo, Park. Chan, Chun. Moo-Young, Oh. Jae Sok, Kim. Kang-Min, Lee. 한국우주과학회 Journal of astronomy and space sciences 8 Pages
한국우주과학회 Journal of astronomy and space sciences 2013, Vol.30 No.4 307-314 (8 pages)
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Vehicle License Plate Tilt Correction Based on the Straight Line Fitting Method and Minimizing Variance of Coordinates of Projection Points
Deb. Kaushik, Vavilin. Andrey, Kim. Jung-Won, Jo. Kang-Hyun 제어로봇시스템학회 International Journal of Control, Automation and Systems 10 Pages
제어로봇시스템학회 International Journal of Control, Automation and Systems 2010, Vol.8 No.5 975-984 (10 pages)
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Suspended Strip Line의 Open End 및 Step 불연속 효과에 대한 고찰
전용구, 양승인, Jeon. Yong-Ku, Yang. Seung-In 대한전자공학회 電子工學會論文誌. Journal of the Institute of Electronics Engineers of Korea. TC, 통신 6 Pages
대한전자공학회 電子工學會論文誌. Journal of the Institute of Electronics Engineers of Korea. TC, 통신 2008, Vol.45 No.12 146-151 (6 pages)
Suspended Strip Line의 Open End와 Step 불연속 효과의 등가회로를 구하였다. 각 불연속 효과를 표현하는 회로정수들을 EM 해석 결과로부터 최적화한 후 수식으로 표현하였으며, 수식의 계수들은 모든 임피던스 경우에 맞도록 curve fitting을 통하여 구하였다. -
고에너지 방사선치료용 on-line 선량측정시스템을 위한 알고리즘의 개발
우홍균, 하성환, Wu. Hong-Hyun, Ha. Sung-Whan 대한방사선방어학회 방사선방어학회지 12 Pages
대한방사선방어학회 방사선방어학회지 1997, Vol.22 No.3 207-218 (12 pages)
사용할 때보다 적은 data를 가지고서도 더욱 정확하게 fitting 할 수 있었다. 따라서 fitting 상수들을 구하는데 필요한 측정시간을 알고리즘 1을 사용할 때보다 반으로 줄일 수 있었다. 결론 : phantom의 후방에서 측정한 투과선량을 이용하여, 임의의 Tp, PCD, FS에서 투과선량을 정확하게 예측할 수 있는 두가지의 알고리즘을 개발하였다. 향후 보조 장치에 의한 영향, 조사야 차폐의 영향, 신체조직의 조직특성 (불균일도, inhomogeneity), 신체 형태의 굴곡에 대한 연구를 완성하면 매치료시마다 종양에 흡수된 방사선량을 확인할 수... -
Comparison of electrophysiological properties of two types of pre-sympathetic neurons intermingled in the hypothalamic paraventricular nucleus
Yiming Shen, Seong Kyu Han, Pan Dong Ryu 대한수의학회 Journal of Veterinary Science 9 Pages
대한수의학회 Journal of Veterinary Science 2018, 제 19권 제 4호 2 483-491 (9 pages)
The hypothalamic paraventricular nucleus (PVN) contains two types of neurons projecting to either the rostral ventrolateral medulla (PVNRVLM) or the intermediolateral horn (IML) of the spinal cord (PVNIML). These two neuron groups are intermingled in the same subdivisions of the PVN and differentially regulate sympathetic outflow. However, electrophysiological evidence supporting such functional differences is largely lacking. Herein, we compared the electrophysiological properties of these... -
Air assisted lamellar keratectomy for the corneal haze model
Soohyun Kim, Young Woo Park, Euiri Lee, Sang Wan Park, Sungwon Park, Jong Whi Kim, Je Kyung Seong, Kangmoon Seo 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2015, 제 16권 제 3호 13 349-356 (8 pages)
To standardize the corneal haze model in the resection depth and size for efficient corneal haze development, air assisted lamellar keratectomy was performed. The ex vivo porcine corneas were categorized into four groups depending on the trephined depth: 250 μm (G1), 375 μm (G2), 500 μm (G3) and 750 μm (G4). The stroma was equally ablated at the five measurement sites in all groups. Significant differences were observed between the trephined corneal depths for resection and ablated corneal... -
Computed tomographic characteristics of acute thoracolumbar intervertebral disc disease in dogs
Changyun Lim, Oh-Kyeong Kweon, Min-Cheol Choi, Jihye Choi, Junghee Yoon, * 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2010, 제 11권 제 1호 11 73-79 (7 pages)
Forty canine patients with a presumptive diagnosis of the intervertebral disc herniation at the thoracolumbar region were imaged. A neurological examination was performed and all patients were classified under four grades by the examination. The degrees of attenuation of the herniated disc material were measured in Housefield units (HU) in each image. The ratio of the area to herniated disc material and the height to disc material were measured. The clinical grade was correlated with the area... -
Antimutagenic and anticarcinogenic effect of methanol extracts of Petasites japonicus Maxim leaves
Hwan-Goo Kang, Sang-Hee Jeong*, †, Joon-Hyoung Cho 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2010, 제 11권 제 1호 8 51-58 (8 pages)
human cancer line cells and by the function and the expression of gap junctions in rat liver epithelial cell. PJ extracts significantly decreased spontaneous β-galactosidase activity and β-galactosidase activity induced by a mutagen, ICR, in Salmonella (S.) typhimurium TA 1535/pSK 1002. All doses of the extract (0.08-100 mg/plate) decreased the reversion frequency induced by benzo (α)pyrene (BaP) in S. typhimurium TA 98. It decreased not only the spontaneous reversion frequency but also that... -
Infrared spectroscopy characterization of normal and lung cancer cells originated from epithelium
So Yeong Lee, Kyong-Ah Yoon, Soo Hwa Jang, Erdene Ochir Ganbold, Dembereldorj Uuriintuya, Sang-Mo Shin, Pan Dong Ryu, Sang-Woo J 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2009, 제 10권 제 4호 4 299-304 (6 pages)
The vibrational spectral differences of normal and lung cancer cells were studied for the development of effective cancer cell screening by means of attenuated total reflection infrared spectroscopy. The phosphate monoester symmetric stretching ns(PO3) band intensity at ∼970 cm and the phosphodiester symmetric stretching ns(PO2) band intensity at ∼1,085 cm in nucleic acids and phospholipids appeared to be significantly strengthened in lung cancer cells with respect to the other... -
Relative biological effectiveness of fast neutrons for apoptosis in mouse hair follicles
Hae-June Lee, Sung-Ho Kim* 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 4호 4 335-340 (6 pages)
This study compared the effects of high linear energy transfer (LET) fast neutrons on the induction of apoptosis in the hair follicles of ICR mice with those of low LET Co ■-rays. The changes that occurred from 0 to 24 h after exposing the mice to either 2 Gy of ■-rays (2 Gy/min) or 0.8 Gy of neutrons (94 mGy/min, 35 MeV) were examined. The maximum frequency was found at 12 h (■- rays) or 8 h (neutrons) after irradiation. The mice that received 0-8 Gy of ■-rays or 0-1.6 Gy of neutrons were... -
Comparative analysis of heart functions in micropigs and conventional pigs using echocardiography and radiography
Min Young Lee, Sang Hun Lee, Seung Gon Lee, Soo Hyun Park, Chai Yong Lee, Kye Hun Kim, Sun Ho Hwang, Sang Yub Lim, Young Keun Ah 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 1호 2 7-14 (8 pages)
The production of miniature animals has been suggested for use in organ transplantation. At present, many of the studies about application of animal organs to human have been focused on pigs because of the number of advantages involved and due to their similarities with human. However, a physiological analysis of the organs to be transplanted has not yet been carried out. Therefore, this study analyzed whether or not there were physiological and morphological differences in the hearts of... -
Biological Rhythm in Livestock
Piccione Giuseppe and Caola Giovanni 대한수의학회 Journal of Veterinary Science 13 Pages
대한수의학회 Journal of Veterinary Science 2002, 제 3권 제 3호 1 145-157 (13 pages)
The animal time structure is a basic fact of life, no matter if one wants to study it or not. The time-dependent, mostly rhythmic, and thus to a certain degree predictable, variations of biochemical and physiological functions and of sensitivity and resistance to many environmental agents are often quite large and offer not only new insight into animal physiology and pathology but also diagnostic possibilities and therapeutic advantages. Chronobiology, chronophysiology and its subspecialities,... -
Tetracycline residue levels in cattle meat from Nairobi salughter house in Kenya
F. K. Muriuki, W. O. Ogara, F. M. Njeruh, E. S. Mitema 대한수의학회 Journal of Veterinary Science 5 Pages
대한수의학회 Journal of Veterinary Science 2001, 제 2권 제 2호 5 97-101 (5 pages)
Two hundred and fifty beef samples were collected from five slaughterhouses in and around the city of Nairobi. The beef animals were sourced from various parts of the country. Samples of 50-100 grams were collected randomly from the liver, kidney and muscle of different beef carcasses. The samples collected were processed using multiresidue analytical methods that included liquid-gas partitioning and set-pat C18 cartridges chromatographic clean up. Chlortetracycline and oxytetracycline detection... -
Establishment of normal reference of radiological morphology of renal artery in mini-pigs by renal angiography
Won Jae Lee , Ji Yeon Kim , Jae Hyung Park , Lisa Soyeon Park , 대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 5 Pages
대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 2016, 제 56권 제 3호 7 177-181 (5 pages)
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Physiology,Pharmacology,Chemistry : Comparison of Linear and non-Linear equation for the calibration of roxithromycin analysis using Liquid chromatography/mass spectrometry
Jong Hwan Lim , Hyo In Yun 대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 7 Pages
대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 2010, 제 50권 제 1호 2 11-17 (7 pages)
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Pain perception among patients treated with passive self-ligating fixed appliances and Invisalign？？ aligners during the first week of orthodontic treatment
Naif N. Almasoud 대한치과교정학회 The Korean Journal of Orthodontics 7 Pages
대한치과교정학회 The Korean Journal of Orthodontics 2018, 제 48권 제 5호 6 326-332 (7 pages)
= 32) using Invisalign？？ aligners. Immediately after fitting the appliances, the patients’ perception of pain was evaluated through a closeended and coded self-administrated questionnaire by using a visual analog scale (VAS). Their responses were recorded at 4 hours, 24 hours, day 3, and day 7. Mann-Whitney U-test, Kruskal-Wallis test, and Pearson’s chi-square test were performed for statistical analysis. Results: A lower percentage of patients treated with Invisalign aligners reported pain... -
Antidepressant drug paroxetine blocks the open pore of Kv3.1 potassium channel
HyangMiLee, OkHeeChai, SangJuneHahn, BokHeeChoi 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2018, Vol.22 No.1 8 71-80 (10 pages)
In patients with epilepsy, depression is a common comorbidity but difficult to be treated because many antidepressants cause pro-convulsive effects. Thus, it is important to identify the risk of seizures associated with antidepressants. To determine whether paroxetine, a very potent selective serotonin reuptake inhibitor (SSRI), interacts with ion channels that modulate neuronal excitability, we examined the effects of paroxetine on Kv3.1 potassium channels, which contribute to high-frequency... -
Acepromazine inhibits hERG potassium ion channels expressed in human embryonic kidney 293 cells
YoungShinJoo, HongJoonLee, Jin-SungChoi, Ki-WugSung 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.1 9 75-82 (8 pages)
The effects of acepromazine on human ether-à-go-go-related gene (hERG) potassium channels were investigated using whole-cell voltage-clamp technique in human embryonic kidney (HEK293) cells transfected with hERG. The hERG currents were recorded with or without acepromazine, and the steady-state and peak tail currents were analyzed for the evaluating the drug effects. Acepromazine inhibited the hERG currents in a concentration-dependent manner with an IC50 value of 1.5 μM and Hill... -
DAMGO modulates two-pore domain K+ channels in the substantia gelatinosa neurons of rat spinal cord
PyungSunCho, HanKyuLee, , SangHoonLee, JayZoonIm, SungJunJung 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2016, Vol.20 No.5 10 525-531 (7 pages)
The analgesic mechanism of opioids is known to decrease the excitability of substantia gelatinosa (SG) neurons receiving the synaptic inputs from primary nociceptive afferent fiber by increasing inwardly rectifying K+ current. In this study, we examined whether a μ-opioid agonist, [D-Ala2,N-Me-Phe4, Gly5-ol]-enkephalin (DAMGO), affects the two-pore domain K+ channel (K2P) current in rat SG neurons using a slice whole-cell patch clamp technique. Also we confirmed which subtypes of K2P channels... -
Facilitation of AMPA receptor-mediated steady-state current by extrasynaptic NMDA receptors in supraoptic magnocellular neurosecretory cells
YoonHyoungPai, ChaeSeongLim, Kyung-AhPark, HyunSilCho, Gyu-SeungLee, YongSupShin, Hyun-WooKim, ByeongHwaJeon, SeokHwaYoon, JinBongPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2016, Vol.20 No.4 12 425-432 (8 pages)
In addition to classical synaptic transmission, information is transmitted between cells via the activation of extrasynaptic receptors that generate persistent tonic current in the brain. While growing evidence supports the presence of tonic NMDA current (INMDA) generated by extrasynaptic NMDA receptors (eNMDARs), the functional significance of tonic INMDA in various brain regions remains poorly understood. Here, we demonstrate that activation of eNMDARs that generate INMDA facilitates the... -
Minimal systems analysis of mitochondria-dependent apoptosis induced by cisplatin
Ji-YoungHong, KenjirouHara, Jun-WooKim, EisukeF.Sato, EunBoShim, Kwang-HyunCho 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 12 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2016, Vol.20 No.4 6 367-378 (12 pages)
Recently, it was reported that the role of mitochondria-reactive oxygen species (ROS) generating pathway in cisplatin-induced apoptosis is remarkable. Since a variety of molecules are involved in the pathway, a comprehensive approach to delineate the biological interactions of the molecules is required. However, quantitative modeling of the mitochondria-ROS generating pathway based on experiment and systemic analysis using the model have not been attempted so far. Thus, we conducted experiments... -
Blockade of Kv1.5 channels by the antidepressant drug sertraline
HyangMiLee, SangJuneHahn, BokHeeChoi 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2016, Vol.20 No.2 8 193-200 (8 pages)
Sertraline, a selective serotonin reuptake inhibitor (SSRI), has been reported to lead to cardiac toxicity even at therapeutic doses including sudden cardiac death and ventricular arrhythmia. And in a SSRI-independent manner, sertraline has been known to inhibit various voltage-dependent channels, which play an important role in regulation of cardiovascular system. In the present study, we investigated the action of sertraline on Kv1.5, which is one of cardiac ion channels. The effect of... -
Blockade of Kv1.5 by paroxetine, an antidepressant drug
HyangMiLee, SangJuneHahn, BokHeeChoi 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2016, Vol.20 No.1 10 75-82 (8 pages)
Paroxetine, a selective serotonin reuptake inhibitor (SSRI), has been reported to have an effect on several ion channels including human ether-a-go-gorelated gene in a SSRI-independent manner. These results suggest that paroxetine may cause side effects on cardiac system. In this study, we investigated the effect of paroxetine on Kv1.5, which is one of cardiac ion channels. The action of paroxetine on the cloned neuronal rat Kv1.5 channels stably expressed in Chinese hamster ovary cells was... -
Bisphenol A and 4-tert-Octylphenol Inhibit Cx46 Hemichannel Currents
SeunghoonOh 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2015, Vol.19 No.1 11 73-79 (7 pages)
Connexins (Cx) are membrane proteins and monomers for forming gap junction (GJ) channels. Cx46 and Cx50 are also known to function as conductive hemichannels. As part of an ongoing effort to find GJ-specific blocker(s), endocrine disruptors were used to examine their effect on Cx46 hemichannels expressed in Xenopus oocytes. Voltage-dependent gating of Cx46 hemichannels was characterized by slowly activating outward currents and relatively fast inward tail currents. Bisphenol A (BPA, 10 nM)... -
Cytotoxic Activity and Quantitative Structure Activity Relationships of Arylpropyl Sulfonamides
YuJinHwang, SangMinPark, ChulBuYim, ChaeukIm 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.3 9 237-243 (7 pages)
B13 is a ceramide analogue and apoptosis inducer with potent cytotoxic activity. A series of arylpropyl sulfonamide analogues of B13 were evaluated for their cytotoxicity using MTT assays in prostate cancer PC-3 and leukemia HL-60 cell lines. Some compounds (4, 9, 13, 14, 15, and 20) showed stronger activities than B13 in both tumor cell lines, and compound (15) gave the most potent activity with IC50 values of 29.2 and 20.7 ՌM, for PC-3and HL-60 cells, respectively. Three-dimensional... -
Wide Spectrum of Inhibitory Effects of Sertraline on Cardiac Ion Channels
Hyang-AeLee, Ki-SukKim, Sung-AeHyun, Sung-GurlPark, SungJoonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.5 6 327-332 (6 pages)
Sertraline is a commonly used antidepressant of the selective serotonin reuptake inhibitors (SSRIs) class. In these experiments, we have used the whole cell patch clamp technique to examine the effects of sertraline on the major cardiac ion channels expressed in HEK293 cells and the native voltage-gated Ca2＋ channels in rat ventricular myocytes. According to the results, sertraline is a potent blocker of cardiac K＋ channels, such as hERG, IKs and IK1. The rank order of inhibitory potency was... -
A Simple Dosing Scheme for Intravenous Busulfan Based on Retrospective Population Pharmacokinetic Analysis in Korean Patients
SangminChoe, GayeongKim, Hyeong-SeokLim, Sang-HeonCho, Jong-LyulGhim, JinAhJung, Un-JibKim, GyujeongNoh, Kyun-SeopBae, DonghoLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.4 7 273-280 (8 pages)
Busulfan is an antineoplastic agent with a narrow therapeutic window. A post-hoc population pharmacokinetic analysis of a prospective randomized trial for comparison of four-times daily versus once-daily intravenous busulfan was carried out to search for predictive factors of intravenous busulfan (iBu) pharmacokinetics (PK). In this study the population PK of iBu was characterized to provide suitable dosing recommendations. Patients were randomized to receive iBu, either as 0.8 mg/kg every 6 h... -
Cytotoxicities and Quantitative Structure Activity Relationships of B13 Sulfonamides in HT-29 and A549 Cells
SeulKiChanLee, SangMinPark, ChaeukIm 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.6 14 423-430 (8 pages)
B13 analogues are being considered as therapeutic agents for cancer cells, since B13 is a ceramide analogue and inhibits ceramidase to promote apoptosis in cancer cells. B13 sulfonamides are assumed to have biological activity similar to B13, since they are made by bioisosterically substituting the carboxyl moiety of B13 with sulfone group. Twenty B13 sulfonamides were evaluated for their in vitro cytotoxicities against human colon cancer HT-29 and lung cancer A549 cell lines using MTT assays.... -
Inhibitory Actions of HERG Currents by the Immunosuppressant Drug Cyclosporin A
SeungHoLee, SangJuneHahn, GyesikMin, JimokKim, Su-HyunJo, HanChoe, BokHeeChoi 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.5 7 291-298 (8 pages)
The effect of cyclosporin A (CsA), an immunosuppressant, on human ether-a-go-go-related gene (HERG) channel as it is expressed in human embryonic kidney cells was studied using a whole-cell, patch-clamp technique. CsA inhibited the HERG channel in a concentration-dependent manner, with an IC50 value and a Hill coefficient of 3.17ՌM and 0.89, respectively. Pretreatment with cypermethrine, a calcineurin inhibitor, had no effect on the CsA-induced inhibition of the HERG channel. The... -
Functional Expression of P2Y Receptors in WERI-Rb1 Retinoblastoma Cells
Na-HyunKim, Kyu-SangPark, JoonHyungSohn, Byung-IlYeh, ChangMannKo, InDeokKong 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.1 9 61-65 (5 pages)
cell, a human retino</SUP>blastoma cell line. ATP (10ՌM) elicited strong but transient [Ca2＋]i increase in a concentration- dependent manner from more than 80% of the WERI-Rb-1 cells (n=46). Orders of potency of P2Y agonists in evoking [Ca2＋]i transients were 2MeS-ATP＞ATP＞＞UTP=ՁՂ-MeATP, which was compatible with the subclass of P2Y1 receptor. The [Ca2＋]i transients evoked by applications of 2MeS-ATP and/or ATP were also profoundly suppressed in the presence of P2Y1... -
Ca2＋-induced Ca2＋ Release from Internal Stores in INS-1 Rat Insulinoma Cells
KyungJinChoi, DongSuCho, JuYoungKim, ByungJoonKim, KyungMooLee, ShinHyeKim, DongKwanKim, SeHoonKim, HyungSeoPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.1 8 53-60 (8 pages)
a rat pancreatic Ղ-cell line, INS-1 cells. To measure cytosolic and stored Ca2＋, respectively, cultured INS-1 cells were loaded with fura-2/AM or furaptra/AM. [Ca2＋]i was repetitively increased by caffeine stimulation in normal Ca2＋ buffer. However, peak [Ca2＋]i was only observed after the first caffeine stimulation in Ca2＋ free buffer and this increase was markedly blocked by ruthenium red, a RyR blocker. KCl-induced elevations in [Ca2＋]i were reduced by pretreatment with ruthenium... -
The Development of Phasic and Tonic Inhibition in the Rat Visual Cortex
Hyun-JongJang, Kwang-HyunCho, , Sung-WonPark, Myung-JunKim, ShinHeeYoon, Duck-JooRhie 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.6 8 399-406 (8 pages)
Gamma-aminobutyric acid (GABA)-ergic inhibition is important in the function of the visual cortex. In a previous study, we reported a developmental increase in GABAA receptor-mediated inhibition in the rat visual cortex from 3 to 5 weeks of age. Because this developmental increase is crucial to the regulation of the induction of long-term synaptic plasticity, in the present study we investigated in detail the postnatal development of phasic and tonic inhibition. The amplitude of phasic... -
Multiple Residues in the P-Region and M2 of Murine Kir 2.1 Regulate Blockage by External Ba2＋
YoungMeeLee, GarethA.Thompson, IanAshmole, MarkLeyl, InsukSo, PeterR.Stanfield 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.1 10 61-69 (9 pages)
We have examined the effects of certain mutations of the selectivity filter and of the membrane helix M2 on Ba2＋ blockage of the inward rectifier potassium channel, Kir 2.1. We expressed mutant and wild type murine Kir 2.1 in Chinese hamster ovary (CHO) cells and used the whole cell patch-clamp technique to record K＋ currents in the absence and presence of externally applied Ba2＋. Wild type Kir2.1 was blocked by externally applied Ba2＋ in a voltage and concentration dependent manner. Mutants... -
Testosterone Relaxes Rabbit Seminal Vesicle by Calcium Channel Inhibition
JongKokKim, WooHaHan, MooYeolLee, SoonChulMyung, SaeChulKim, MinKyKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.2 6 73-78 (6 pages)
Recent studies have documented that testosterone relaxes several smooth muscles by modulating K+ channel activities. Smooth muscles of seminal vesicles play a fundamental role in ejaculation, which might involve testosterone. This study was aimed to assess the role of testosterone in seminal vesicular motility by studying its effects on contractile agents and on the ion channels of single vesicular myocytes in a rabbit model. The contractile responses of circular smooth muscle strips of rabbit... -
Direct Block of Cloned K+ Channels, Kv1.5 and Kv1.3, by Cyclosporin A, Independent of Calcineurin Inhibition
BokHeeChoi, SangJuneHahn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.6 7 353-362 (10 pages)
The interaction of cyclosporine A (CsA), an immunosuppressant, with rat brain Kv1.5 (Kv1.5) channels, which were stably expressed in Chinese hamster ovary cells, was investigated using the whole-cell patch-clamp technique. CsA reversibly blocked Kv1.5 currents at 50 mV in a reversible concentration- dependent manner with an apparent IC50 of 1.0μM. Other calcineurin inhibitors (cypermethrin, autoinhibitory peptide) had no effect on Kv1.5 and did not prevent the inhibitory effect of CsA.... -
Inhibition of Sarcoplasmic Reticulum Ca2+ Uptake by Pyruvate and Fatty Acid in H9c2 Cardiomyocytes: Implications for Diabetic Cardiomyopathy
EunHeeLee, HyeKyungLee, HaeWonKim, Young-HoonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.4 2 195-202 (8 pages)
High extracellular glucose concentration was reported to suppress intracellular Ca2 clearing through altered sarcoplasmic reticulum (SR) function. In the present study, we attempted to elucidate the effects of pyruvate and fatty acid on SR function and reveal the mechanistic link with glucose-induced SR dysfunction. For this purpose, SR Ca2-uptake rate was measured in digitonin-permeabilized H9c2 cardiomyocytes cultured in various conditions. Exposure of these cells to 5 mM... -
Protein Kinase C Activates ATP-sensitive Potassium Channels in Rabbit Ventricular Myocytes
NariKim, JaeBoumYoum, HyunJoo, HyungkyuKim, EuiyongKim, JinHan 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.4 1 187-194 (8 pages)
Several signal transduction pathways have been implicated in ischemic preconditioning induced by the activation of ATP-sensitive K (KATP) channels. We examined whether protein kinase C (PKC) modulated the activity of KATP channels by recording KATP channel currents in rabbit ventricular myocytes using patch-clamp technique and found that phorbol 12,13-didecanoate (PDD) enhanced pinacidil-induced KATP channel activity in the cell-attached configuration; and this effect was prevented by... -
Effects of Dopamine on Intracellular pH in Opossum Kidney Cells
KyungWooKang, YungKyuKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.3 11 187-191 (5 pages)
Na/H exchanger (NHE) has a critical role in regulation of intracellular pH (pHi) in the renal proximal tubular cells. It has recently been shown that dopamine inhibits NHE in the renal proximal tubules. Nevertheless, there is a dearth of information on the effects of long-term (chronic) dopamine treatment on NHE activities. This study was performed to elucidate the pHi regulatory mechanisms during the chronic dopamine treatments in renal proximal tubular OK cells. The resting pHi... -
Intrinsic Gating in Inward Rectifier Potassium Channels (Kir2.1) with Low Polyamine Affinity Generated by Site Directed Mutagenesis
ISo, , IAshmole, HSoh, CSPark, PJSpencer, MLeyl, PRStanfield, 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 12 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.3 3 131-142 (12 pages)
We have studied mutant forms of Kir2.1 in which an aspartate residue (D172), important for gating by intracellular polyamines, is replaced by one of three basic residues (Arg, Lys or His). Such channels are highly selective for K+, but show inward rectification that is a shallow function of voltage compared with that found in wild type. This inward rectification occurs with a reduced affinity for spermine and persists in the absence of polyamines. Though the unitary current-voltage relation... -
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)
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... -
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)
Cholinergic modulation of GABAergic spontaneous miniature inhibitory postsynaptic currents (mIPSCs) by the activation of muscarine receptors was investigated in mechanically dissociated rat nucleus basalis of the Meynert neurons using the conventional whole-cell patch recording configuration. Muscarine (10μM) reversibly and concentration-dependently decreased mIPSC frequency without affecting the current amplitude distribution. Muscarine action on GABAergic mIPSCs was completely blocked by... -
Effect of Propofol, an Intravenous Anesthetic Agent, on KATP Channels of Pancreatic β-cells in Rats
EunJeePark, Dae-KyuSong, JaeKyuCheun, JungInBae, Won-KyungHo, YungEEarm 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.1 4 25-31 (7 pages)
ATP-sensitive potassium channels (KATP channels) play an important role in insulin secretion from pancreatic beta cells. We have investigated the effect of propofol on KATP channels in cultured single pancreatic beta cells of rats. Channel activity was recorded from membrane patches using the patch-clamp technique. In the inside-out configuration bath-applied propofol inhibited the KATP channel activities in a dose-dependent manner. The half-maximal inhibition dose (ED50) was 48.6⁑8.4μM... -
Role of K+ Channels to Resting Membrane Potential of Rabbit Middle Cerebral Arterial Smooth Muscle Cells
NariKim, JinHan, EuiyongKim, Yun-HeeKim, Jae-HongSim, Soo-CheonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.6 2 547-554 (8 pages)
The aim of the present study is to investigate the contribution of Ca2-activated K (KCa) channels and delayed rectifier K (KV) channels to the resting membrane potential (RMP) in rabbit middle cerebral arterial smooth muscle cells. The RMP and membrane currents were recorded using the whole-cell patch configuration and single KCa channel was recorded using the outside-out patch configuration. Using the pipette solution containing 0.05 mM EGTA, the RMP was... -
Effect of Ethanol on Na+-Pi Uptake in Opossum Kidney Cells Role of Membrane Fluidization and Reactive Oxygen Species
InHoPark, MoonYoungHwang, JaeSukWoo, JinSupJung, YongKeunKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.5 10 529-538 (10 pages)
This study was undertaken to examine the effect of ethanol on Na-dependent phosphate (Na-Pi) uptake in opossum kidney (OK) cells, an established renal proximal tubular cell line. Ethanol inhibited Na-dependent component of phosphate uptake in a dose-dependent manner with I50 of 8.4%, but it did not affect Na-independent component. Similarly, ethanol inhibited Na-dependent uptakes of glucose and amino acids (AIB, glycine, alanine, and leucine). Microsomal...
