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A High Performance Three-Phase Telecom Supply Incorporating a HF Switched Mode Rectifier with a Phase Shifted PWM Controller
Shahani. Arushi, Singh. Bhim, Bhuvaneshwari. G. 전력전자학회 Journal of power electronics : JPE 9 Pages
전력전자학회 Journal of power electronics : JPE 2010, Vol.10 No.3 219-227 (9 pages)
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Basic Study of a Phase-Shifted Soft Switching High-Frequency Inverter with Boost PFC Converter for Induction Heating
Kawaguchi. Yuki, Hiraki. Eiji, Tanaka. Toshihiko, Nakaoka. Mutsuo 전력전자학회 Journal of power electronics : JPE 8 Pages
전력전자학회 Journal of power electronics : JPE 2008, Vol.8 No.2 192-199 (8 pages)
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The Role of Religion in Contemporary Education
Maarten Meijer 한국종교교육학회 종교교육학연구 15 Pages
한국종교교육학회 종교교육학연구 2010, 제 34권 1 1-15 (15 pages)
In secondary school, Korean students are supposed to absorb ethical lessons in their dodeok classes. However, since the parameters of modern Korean society have notably shifted, there is a significant shortfall in the ethical development of Korean young people. This manifests itself in all manner of irresponsible and immoral practices in the lives of those of the younger generation. At Cheongshim International Academy, we are attempting to test the boundaries of what the establishment of a... -
Immediate effects of single-leg stance exercise on dynamic balance, weight bearing and gait cycle in stroke patients
Ji-Hye Jung, Si-Eun Ko, Seung-Won Lee 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2014, 제 3권 제 1호 9 49-54 (6 pages)
Objective: This study aimed to identify how various applications of weight bearing on the affected side of hemiplegia patients affect the ability of balance keeping of the affected leg and the gait parameters. Design: Cross-sectional study. Methods: Eighteen patients with hemiplegia participated in this study. There were twelve males and six females. This study investigated the effects of the single-leg stance exercise on dynamic balance, weight bearing, and gait ability compared with four... -
The use of laser Doppler blood flow to assess the effect of acute administration of vitamin D on micro vascular endothelial function in people with diabetes
Jerrold Petrofsky, Faris Alshammari, Iman Akef Khowailed, Riya Lodha, Pooja Deshpande, Praveen Rajaram, Mahendra Gaikwad, Vidhi Vadera 물리치료재활과학회 Physical Therapy Rehabilitation Science 7 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2013, 제 2권 제 2호 1 63-69 (7 pages)
Objective: To assess the effect of vitamin D administration on the skin blood flow response to occlusion and heat. Design: Cross-sectional study. Methods: Twenty age matched subjects; 10 who had diabetes and 10 who were controls were administered 4,000 IU of vitamin D3 for 3 weeks at breakfast. The function of the endothelial cells was evaluated in 2 ways; first, the response to 4 minutes of vascular occlusion of the skin was measured with a laser Doppler flow meter. Second, the skin blood flow... -
The role of rpoS, hmp, and ssrAB in Salmonella enterica Gallinarum and evaluation of a triple-deletion mutant as a live vaccine candidate in Lohmann layer chickens
Youngjae Cho, Yoon Mee Park, Abhijit Kashinath Barate, So-Yeon Park, Hee Jeong Park, Mi Rae Lee, Quang Lam Truong, Jang Won Yoon 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2015, 제 16권 제 2호 8 187-194 (8 pages)
Salmonella enterica Gallinarum (SG) causes fowl typhoid (FT), a septicemic disease in avian species. We constructed deletion mutants lacking the stress sigma factor RpoS, the nitric oxide (NO)-detoxifying flavohemoglobin Hmp, and the SsrA/SsrB regulator to confirm the functions of these factors in SG. All gene products were fully functional in wild-type (WT) SG whereas mutants harboring single mutations or a combination of rpoS, hmp, and ssrAB mutations showed hypersusceptibility to H2O2, loss... -
Functional recovery and neural differentiation after transplantation of allogenic adipose-derived stem cells in a canine model of acute spinal cord injury
Hak-Hyun Ryu, Ji-Hey Lim, Ye-Eun Byeon, Jeong-Ran Park, Min-Soo Seo, Young-Won Lee, Wan Hee Kim, Kyung-Sun Kang*, Oh-Kyeong Kweo 대한수의학회 Journal of Veterinary Science 12 Pages
대한수의학회 Journal of Veterinary Science 2009, 제 10권 제 4호 1 273-284 (12 pages)
In this study, we evaluated if the implantation of allogenic adipose-derived stem cells (ASCs) improved neurological function in a canine spinal cord injury model. Eleven adult dogs were assigned to three groups according to treatment after spinal cord injury by epidural balloon compression: C group (no ASCs treatment as control), V group (vehicle treatment with PBS), and ASC group (ASCs treatment). ASCs or vehicle were injected directly into the injured site 1 week after spinal cord injury.... -
Phytotherapeutic effects of Echinacea purpurea in gamma-irradiated mice
Amira M. K. Abouelella, Yasser E. Shahein*, Sameh S. Tawfik, Ahmed M. Zahran 대한수의학회 Journal of Veterinary Science 12 Pages
대한수의학회 Journal of Veterinary Science 2007, 제 8권 제 4호 5 341-352 (12 pages)
Echinacea (E.) purpurea herb is commonly known as the purple coneflower, red sunflower and rudbeckia. In this paper, we report the curative efficacy of an Echinacea extract in ■-irradiated mice. E. purpurea was given to male mice that were divided into five groups (control, treated, irradiated, treated before irradiation & treated after irradiation) at a dose of 30 mg/kg body weight for 2 weeks before and after irradiation with 3 Gy of ■-rays. The results reflected the detrimental... -
Laminitis in Przewalski horses kept in a semireserve
Klaus-Dieter Budras, Klaus Scheibe, Bianca Patan, Wolf J. Streich, Kabsu Kim 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2001, 제 2권 제 1호 1 1-7 (7 pages)
Semireserves were created by the European Conserva-tion Project for scientific research in preparation for rein-troduction in the wilderness. They are defined as enclosures large enough to carry a group of Przewalski horses throughout the year without any additional feed-ing. The semireserve offers diverse opportunities for sig-nificant scientific research. As part of a general screening program, the hoof development in a group of Przewalski horses was investigated in the semireserve Schorfheide... -
Effect of adrenalectomy on gene expression of adrenoceptor subtypes in the hypothalamic paraventricular nucleus
KyungYoonKam, SeungYubShin, SeongKyuHan, LongHuaLi, WoNeeChong, DaeHyunBaek, SoYeongLee, PanDongRyu 대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 9 Pages
대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 2004, 제 44권 제 2호 8 207-215 (9 pages)
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Biology Teachers’ Perception of Value of Biology Learning
Minsu Ha 한국교원대학교 뇌기반교육연구소 Brain, Digital, & Learning 8 Pages
한국교원대학교 뇌기반교육연구소 Brain, Digital, & Learning 2019, 제 9권 제 2호 1 1-8 (8 pages)
This study aimed to identify three hypotheses. (1) Korean biology teachers believe that zoology, botany, and genetics are more related to human life than other biological subjects. (2) Korean biology teachers believe that zoology, botany, and genetics are more important than other biological subjects. (3) Korean biology teachers make more effort to teach zoology, botany, and genetics than other biological subjects. Fifty in-service secondary biology teachers participated in this study. All... -
Patterns of Psychosocial Adaptation to Chronic Illness and Disability
Jeong Han Kim, Norman L. Berven Yves, Ambroise Summer, Ibarra Tae Sun Kim 한국교육치료학회 교육치료연구 22 Pages
한국교육치료학회 교육치료연구 2010, Vol.2 No.2 1 1-22 (22 pages)
This study examined the patterns of psychosocial adaptation to chronic illness and disability(CID), defined in terms of subjective well-being and coping strategies in a sample of 100 individuals with various CID conditions. Cluster analysis revealed four distinct clusters of respondents, suggesting a varying degree of psychosocial adaptation. These clusters were labeled succumbing(n=9), surviving(n=40), resilient(n=41), and thriving(n=10). Our findings indicate that resilient and succumbing... -
Botulinum toxin type A enhances the inhibitory spontaneous postsynaptic currents on the substantia gelatinosa neurons of the subnucleus caudalis in immature mice
Seon-Hui Jang, Soo-Joung Park, Chang-Jin Lee, Dong-Kuk Ahn, Seong-Kyu Han 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2018, Vol.22 No.5 7 539-546 (8 pages)
Botulinum toxin type A (BoNT/A) has been used therapeutically for various conditions including dystonia, cerebral palsy, wrinkle, hyperhidrosis and pain control. The substantia gelatinosa (SG) neurons of the trigeminal subnucleus caudalis (Vc) receive orofacial nociceptive information from primary afferents and transmit the information to higher brain center. Although many studies have shown the analgesic effects of BoNT/A, the effects of BoNT/A at the central nervous system and the action... -
Lysophosphatidic acid enhances breast cancer cells-mediated osteoclastogenesis
Ju-Suk Nam, Ashish Ranjan Sharma, Lich Thi Nguyen, Supriya Jagga, Yeon-Hee Lee, Garima Sharma, Sang-Soo Lee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2018, Vol.22 No.5 4 503-511 (9 pages)
Lysophosphatidic acid (LPA) is known to play a critical role in breast cancer metastasis to bone. In this study, we tried to investigate any role of LPA in the regulation of osteoclastogenic cytokines from breast cancer cells and the possibility of these secretory factors in affecting osteoclastogenesis. Effect of secreted cytokines on osteoclastogenesis was analyzed by treating conditioned media from LPA-stimulated breast cancer cells to differentiating osteoclasts. Result demonstrated that... -
Electrophysiological characteristics of R47W and A298T mutations in CLC-1 of myotonia congenita patients and evaluation of clinical features
HyungJinChin, ChanHyeongKim, KotdajiHa, JinHongShin, Dae-SeongKim, InsukSo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.4 10 439-447 (9 pages)
Myotonia congenita (MC) is a genetic disease that displays impaired relaxation of skeletal muscle and muscle hypertrophy. This disease is mainly caused by mutations of CLCN1 that encodes human skeletal muscle chloride channel (CLC-1). CLC-1 is a voltage gated chloride channel that activates upon depolarizing potentials and play a major role in stabilization of resting membrane potentials in skeletal muscle. In this study, we report 4 unrelated Korean patients diagnosed with myotonia congenita... -
Effects of acidic pH on voltage-gated ion channels in rat trigeminal mesencephalic nucleus neurons
Jin-EonHan, Jin-HwaCho, In-SunChoi, Do-YeonKim, Il-SungJang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.2 9 215-223 (9 pages)
A pH 6.0 solution slightly, but significantly inhibited the peak amplitude of voltage-dependent K+ currents. The pH 6.0 also shifted both the current-voltage and conductance-voltage relationships to the depolarization range. The application of a pH 6.5 solution scarcely affected the peak amplitude of membrane currents mediated by HCN channels, which were profoundly inhibited by the general HCN channel blocker Cs+ (1 mM). However, the pH 6.0 solution slightly, but significantly inhibited the peak... -
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)
a relatively lower affinity for the closed state of hERG channels. A fast application of acepromazine during the tail currents inhibited the open state of hERG channels in a concentration-dependent. The steady-state inactivation of hERG currents shifted to the hyperpolarized direction by acepromazine. These results suggest that acepromazine inhibits the hERG channels probably by an open- and inactivated-channel blocking mechanism. Regarding to the fact that the hERG channels are the potential... -
Effects of CoCl2 on multi-lineage differentiation of C3H/10T1/2 mesenchymal stem cells
HongIlYoo, YeonHeeMoon, MinSeokKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2016, Vol.20 No.1 7 53-62 (10 pages)
some genes including hypoxia-inducible factor-1a (HIF-1a) and vascular endothelial growth factor (VEGF). This study evaluated the potential role of CoCl2 preconditioning on multi-lineage differentiation of C3H/10T1/2, a murine MSC line to understand its possible molecular mechanisms in vitro. CoCl2 treatment of MSCs markedly increased HIF-1a and VEGF mRNA, and protein expression of HIF-1a. Temporary preconditioning of MSCs with CoCl2 induced up-regulation of osteogenic markers including alkaline... -
Streptozotocin Diabetes Attenuates the Effects of Nondepolarizing Neuromuscular Relaxants on Rat Muscles
LinaHuang, DanChen, ShitongLi 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2014, Vol.18 No.6 3 461-468 (8 pages)
4 and 16 weeks of STZ treatment. The concentration-twitch tension curves were significantly shifted from those of the control group to the right in the diabetic groups. Concentration giving 50% of maximal inhibition (IC50) was larger in the diabetic groups for all the NDMRs. For rocuronium and cisatracurium in both SOL and EDL, IC50 was significantly larger in diabetic 16 weeks group than those in the diabetic 4 weeks group. For SOL/EDL, the IC50 ratios were significantly largest in the diabetic... -
Dexamethasone Induces FcgRIIb Expression in RBL-2H3 Cells
PrashantaSilwal, Mi-NamLee, Choong-JaeLee, Jang-HeeHong, UkNamgung, Zee-WonLee, JinhyunKim, KyuLim, GiRyangKweon, JongILPark, SeungKielPar 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.6 4 393-398 (6 pages)
Mast cells are involved in allergic responses, protection against pathogens and autoimmune diseases. Dexamethasone (Dex) and other glucocorticoids suppress FcՅRI-mediated release of inflammatory mediators from mast cells. The inhibition mechanisms were mainly investigated on the downstream signaling of Fc receptor activations. Here, we addressed the effects of Dex on Fc receptor expressions in rat mast cell line RBL-2H3. We measured mRNA levels of Fc receptors by real-time PCR. As... -
Effects of Treadmill Exercise on the Recovery of Dopaminergic Neuron Loss and Muscle Atrophy in the 6-OHDA Lesioned Parkinson's Disease Rat Model
Myoung-AeChoe, Byung-SooKoo, GyeongJuAn, SongheeJeon 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.5 3 305-312 (8 pages)
This study was to determine the effect of exercise on the recovery of dopaminergic neuron loss and muscle atrophy in 6-OHDA-induced hemi Parkinson's disease model. Exercise was loaded twice per day for 30 minutes each time, at 5 days after 6-OHDA lesioning and continued for 16 days using a treadmill. Exercise significantly increased the number of tyrosine hydroxylase positive neuron in the lesioned substantia nigra and the expression level of tyrosine hydroxylase in the striatum compared with... -
Fluoxetine and Sertraline Attenuate Postischemic Brain Injury in Mice
TaeKyeongShin, MiSunKang, HoYounLee, MooSangSeo, SiGeunKim, ChiDaeKim, WonSukLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.3 17 257-263 (7 pages)
fluoxetine and sertraline significantly reduced the infarct size. The Evans blue extravasation indices of the fluoxetine- and sertraline-treated groups were significantly lower than that of the vehicle group. Treatment with fluoxetine and sertraline shifted the lower limit of the mean arterial blood pressure for cerebral blood flow autoregulation toward normal, and significantly increased the expression of heme oxygenase-1 (HO-1) and hypoxia-inducible factor-1Ձ (HIF-1Ձ) proteins in t... -
Voltage-dependent Ca2＋ Current Identified in Freshly Isolated Interstitial Cells of Cajal (ICC) of Guinea-pig Stomach
YoungChulKim, HikaruSuzuki, Wen-XieXu, HikaruHashitani, WoongChoi, Hyo-YungYun, Seon-MeePark6, SeiJinYoun6, Sang-JeonLee, SangJinLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.6 6 323-330 (8 pages)
The properties of voltage dependent Ca2＋ current (VDCC) were investigated in interstitial cells of Cajal (ICC) distributed in the myenteric layer (ICC-MY) of guinea-pig antrum. In tissue, ICC-MY showed c-Kit positive reactions and produced driving potentials with the amplitude and frequency of about 62 mV and 2 times min−1, respectively, in the presence of 1</SUP>ՌM nifedipine. Single ICC-MY isolated by enzyme treatment also showed c-Kit immunohistochemical reactivity. These... -
Modeling of Arrhythmogenic Automaticity Induced by Stretch in Rat Atrial Myocytes
JaeBoumYoum, ChaeHunLeem, YinHuaZhang, NariKim, JinHan, YungE.Earm 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.5 8 267-274 (8 pages)
Since first discovered in chick skeletal muscles, stretch-activated channels (SACs) have been proposed as a probable mechano-transducer of the mechanical stimulus at the cellular level. Channel properties have been studied in both the single-channel and the whole-cell level. There is growing evidence to indicate that major stretch-induced changes in electrical activity are mediated by activation of these channels. We aimed to investigate the mechanism of stretch-induced automaticity by... -
Characterization of Ionic Currents in Human Neural Stem Cells
ChaeGilLim, Sung-SooKim, HaeyoungSuh-Kim, Young-DonLee, SeungCheolAhn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.4 1 131-136 (6 pages)
The profile of membrane currents was investigated in differentiated neuronal cells derived from human neural stem cells (hNSCs) that were obtained from aborted fetal cortex. Whole-cell voltage clamp recording revealed at least 4 different currents: a tetrodotoxin (TTX)-sensitive Na+ current, a hyperpolarization-activated inward current, and A-type and delayed rectifier-type K+ outward currents. Both types of K+ outward currents were blocked by either 5 mM tetraethylammonium (TEA) or 5 mM... -
Regulation of Vacuolar H+-ATPase c Gene Expression by Oxidative Stress
Whan-JongKwak, Seong-MookKim, Min-SungKim, Jung-HoonKang, Dong-JinKim, Ho-ShikKim, Oh-JooKown, In-KyungKim, Seong-WhanJeong 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.5 4 275-282 (8 pages)
By using differential display, we identified one of the genes encoding the multi-subunit complex protein V-ATPase, c subunit gene (ATP6L), and showed alterations of the gene expression by oxidative stresses. Expression of the ATP6L gene in Neuro-2A cells was increased by the treatment with H2O2 and incubation in hypoxic chamber, implying that the expression of the ATP6L gene is regulated by oxidative stresses. To examine mechanisms involved in the regulation of the gene expression by oxidative... -
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... -
Helicobacter pylori Vacuolating Toxin Exhibits Polar Activity of Cl- Secretion and Secretory Response to Carbachol in T84 Cells
NanGeJin, YongRiJin, InsukSo, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2004, Vol.8 No.5 8 289-293 (5 pages)
To investigate whether VacA (vacuolating toxin) produced by Helicobacter pylori `Korean stain 99 induces intestinal secretion, purified VacA was added to T84 cell monolayers mounted in Ussing chambers, and electrical parameters were monitored. Mucosal addition of low pH-pretreated VacA increased short circuit current (Isc). The effect was time- and dose-dependent and saturable. The time-to-peak Isc was concentration-dependent. Chloride channel inhibitors, niflumic acid or 5-... -
Vibrio vulnificus Cytolysin Forms Anion-selective Pores on the CPAE Cells, a Pulmonary Endothelial Cell Line
Bok-HeeChoi, Byung-HyunPark, Yong-GeunKwak 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2004, Vol.8 No.5 4 259-264 (6 pages)
and 20 mM, the reversal potential shifted from 0 to 11.8 and 28.2 mV, respectively. The relative permeability of the cytolysin pores to anions measured at 40 mV was Cl = NO2 ≥ Br = I ＞ SCN ＞ acetate ＞ isethionate ＞ ascorbic acid ＞ EDTA2, in descending order. The cytolysin-induced pore current was blocked by Cl channel blockers or nucleotides. These results indicate that V. vulnificus cytolysin forms... -
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).... -
Noradrenergic Modulation of Spontaneous Inhibitory Postsynaptic Currents in the Hypothalamic Paraventricular Nucleus
LongHwaLee, WoneeChong, KihoLee, JinBongPark, PanDongRyu 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2002, Vol.6 No.2 2 71-80 (10 pages)
Previous studies have suggested that brain stem noradrenergic inputs differentially modulate neurons in the paraventricular nucleus (PVN). Here, we compared the effects of norepinephrine (NE) on spontaneous GABAergic inhibitory postsynaptic currents (sIPSCs) in identified PVN neurons using slice patch technique. In 17 of 18 type I neurons, NE (30∼100μM) reversibly decreased sIPSC frequency to 41⁑7% of the baseline value (4.4⁑0.8 Hz, p＜0.001). This effect was blocked by yohimbine... -
The Inhibitory Effect of Opioid on the Hyperpolarization-Activated Cation Currents in Rat Substantia Gelatinosa Neurons
GeunHeeSeol, JunKim, SunHeeCho, WonKiKim, JongWhanKim, SangJeongKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.5 2 373-380 (8 pages)
potential of the current were compatible to neuronal Ih. DAMGO (1μM), a selective- opioid agonist, reduced the amplitude of Ih reversibly. This reduction was dose-dependent and was blocked by CTOP (2μM), a selective μ-opioid antagonist. DAMGO shifted the voltage dependence of activation to more hyperpolarized potential. Cesium (1 mM) or ZD 7288 (100μM) blocked Ih and the currents inhibited by cesium, ZD 7288 and DAMGO shared a similar time and voltage dependence. These results suggest that... -
Pulse Exposure to Ethanol Augments Vascular Contractility Through Stress Response
Eun-KyoungYangInKyeomKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.1 7 47-53 (7 pages)
as a risk factor for hypertension. However, the mechanism by which alcohol intake causes hypertension still remains elusive. We tested the hypothesis that ethanol itself acts as a stress factor on vasculature and indirectly modulates vascular contractility. After end of exposure to 1, 2.5 and 5% ethanol for 45 min, rat aortic strips were subjected to contractile responses, immunoblot for Hsp70 and the measurement of levels of myosin light chain phosphorylation. Exposure to 5% ethanol not only... -
Postnatal Changes in Atrial Compliance and Stretch-Induced ANP Secretion in Rabbits
SuhnHeeKim, KyungSunLee, SungZooKim, KyungHwanSeul, KyungWooCho 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.5 8 393-401 (9 pages)
(ECF) into the atrial lumen. However, mechanically stimulated ECF translocation was lower in 1-day-old rabbits than that in 1-wk-old rabbits. Therefore, positive relationship between mechanically stimulated ECF translocation and ANP secretion was shifted upward in 1-day-old rabbits, as compared to 1-wk-old rabbits. Changes in atrial volume and ECF translocation were gradually increased with aging and reached the peak value at 4 wk. The stretch-induced ANP secretion in terms of ECF translocation... -
Effects of Prostaglandin F2α on Membrane Potentials and K+ Currents in Rabbit Middle Cerebral Arterial Cells
NariKim, JinHan, WonGueKim, EuiyongKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.4 5 301-309 (9 pages)
The purpose of our investigation was to examine the effects of prostaglandin F2α (PGF2α) on membrane potentials, Ca2-activated K (KCa) channels, and delayed rectifier K (KV) channels using the patch-clamp technique in single rabbit middle cerebral arterial smooth muscle cells. PGF2α significantly hyperpolarized membrane potentials and increased outward whole-cell K currents. PGF2α increased open-state probability of KCa channels without the change of the open and... -
Changes in the Endothelin-1-induced Contraction of Aorta in Streptozotocin-induced Diabetic Rats
HyunJooCheong, EunJinKim, SuJinKim, SunHeeLee, ByungYongRhim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 11 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.3 3 185-195 (11 pages)
ETB receptor antagonist, maximum response was decreased and the dose-response curves for ET-1 were shifted to the right in both groups and pA2 values were 7.9 and 7.7 (slope, 1.05 in control and DM rats), respectively. IRL 1620 and sarafotoxin S6c, ETB agonists, induced relaxation in control rats but not in DM rats. These results indicate that endothelial cell dysfunction and enhanced immunoreactivity of ET-1 have been found in DM rat and ET-1-induced contraction was attenuated in DM rat. These... -
Muscarinic Receptor Subtype Controlling the Carbachol-Induced Muscle Contraction in Guinea Pig Gastric Antrum
JongChulRhee, Dae-YongUhm, TongMookKang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.2 4 105-111 (7 pages)
of the three muscarinic receptor antagonists, 4-diphenylacetoxy- N-methylpeperdine methiodide (4-DAMP), methoctramine and pirenzepine shifted the concentration- response curves to the right without significantly reducing the maximum force. The affinities of the muscarinic antagonists (pA2 values) obtained from Schild plot analysis were 10.15, 7.05 and 6.84 for 4-DAMP, methoctramine and pirenzepine, respectively. These results suggest that the M3-subtype mainly mediate the muscle contraction in... -
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)
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 of activation was not affected by capsaicin. These multiple effects of capsaicin may suggest that capsaicin bind to the region of K channel, participating in inactivation process. -
The Effects of Sera from Amyotrophic Lateral Sclerosis Patients on Neuromuscular Transmission and Calcium Channels in Mice
HaiDunYan, JimokKim, SungJunJung, JunKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 17 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.1 13 101-117 (17 pages)
which were significantly higher than those of wobbler controls (wobblers without the symptoms of wobbler). Sera from ALS patients significantly reduced HVA calcium currents of DRG cells to 42.7% at 10 mV. Furthermore, the inactivation curve shifted to more negative potentials with its half-inactivation potential changed by 6.98 mV. There were, however, significant changes neither in the reversal potential of ICa nor in the I-V curve. From these results it was concluded that: 1) The serum...
