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Responses of Dorsal Horn Neurons to Peripheral Chemical Stimulation in the Spinal Cord of Anesthetized Cats
SungJunJung, JooMinPark, JoonHoLee, JiHyeLee, Su-YongEun, SangJeongKim, Won-IlLim, SunHeeCho, JunKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.1 3 15-24 (10 pages)
Although nociceptive informations are thought to be processed via different neural mechanisms depending on the types of stimuli, sufficient data have not been accumulated yet. We performed a series of experiments to elucidate the possible neural mechanisms as to chemical stimuli such as formalin, capsaicin and ATP. Single unit activity of wide dynamic range (WDR) neurons and high threshold cells were recorded extracellularly from the lumbosacral enlargement of cat spinal cord before and after... -
Role of Ca2+ in the Stimulation of Glucose Transport by Insulin in Adipocytes
Sung-HoeChang, YeonJinJang, Kun-KooPark, GhiSuKim, HeeJeongRyu, ChunSikPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.3 14 357-364 (8 pages)
We investigated the role of Ca2 and protein kinases/phosphatases in the stimulatory effect of insulin on glucose transport. In isolated rat adipocytes, the simple omission of CaCl2 from the incubation medium significantly reduced, but did not abolish, insulin-stimulated 2-deoxy glucose (2-DG) uptake. Pre-loading adipocytes with intracellular Ca2 chelator, 5,5'-dimethyl bis (o-aminophenoxy)ethane-N,N,N'N' tetraacetic acetoxymethyl ester (5,5'-dimethyl BAPTA/AM) completely blocked... -
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)
Amyotrophic lateral sclerosis (ALS) is a degenerative neuromuscular disease of unknown etiology in which the upper and lower motor neurons are progressively destroyed. Recent evidences support the role of autoimmune mechanisms in the pathogenesis of ALS. This study investigated the effects of sera from ALS patients on neuromuscular transmission in phrenic nerve-hemidiaphragm preparations and on calcium currents of single isolated dorsal root ganglion (DRG) cells in mice. Mice were injected with... -
Mechanism of Membrane Hyperpolarization by Extracellular K+ in Resistance-sized Cerebral Arterial Muscle Cell of Rabbit
SeHoonKim, KunMooChoi, HoeSukKim, ByeongHwaJeon, SeokJongChang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.1 1 1-10 (10 pages)
We sought to find out the mechanism of vascular relaxation by extracellular K concentration ([K]o) in the cerebral resistant arteriole from rabbit. Single cells were isolated from the cerebral resistant arteriole, and using voltage-clamp technique barium-sensitive K currents were recorded, and their characteristics were observed. Afterwards, the changes in membrane potential and currents through the membrane caused by the change in [K]o was observed. In the smooth... -
Roles of Na+-Ca2+ Exchange in the Negative Force-Frequency Relationship
ChangMannKoSoonJinKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.6 8 715-724 (10 pages)
Frequency-force relationships (FFR) were studied in electrically field stimulated rat left atria (LA) by reducing the stimulation frequency from resting 3 Hz to test frequencies (0.1-1 Hz) for 5 minutes. The twitch amplitudes of LA elicited the typical negative staircases with 3-phased changes: the initial rapid increase, the second decrease and the following plateau at test frequencies. Verapamil (3⁓105 M) pretreatment elicited frequency-dependent suppression of the twitch... -
Further Characterization of Bombesin Like Immunoreactivities from the Skin of Korean Fire-bellied Toad, Bombina orientalis
HyeokYilKwon, HyungSeoPark, MooHoWon, YunLyulLee, HyoungJinPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.5 12 637-644 (8 pages)
Previously, we have isolated authentic bombesin and another bombesin like peptide named bombesin like immunoreactivity (BLI)-K2 from the skin of Korean fire-bellied toad, Bombina orientalis. In the present study, we have newly purified three heterogeneous forms of BLI named BLI-K3, BLI-K4, and BLI-K5 from side fractions obtained in previous isolation of bombesin like peptide. The BLIs were separated into five peaks on a column of C18 preparative HPLC. Among them, three minor peaks containing... -
Regulation of Salt and Volume Transport along the Nephron during Acute Systolic Hypertension
AliciaA.McDonough, YibinZhang, ClaraE.Magyar, AustinK.Mircheff 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.5 1 541-547 (7 pages)
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Increased Activity of Large Conductance Ca2+-Activated K+ Channels in Negatively-Charged Lipid Membranes
JinBongParkPanDongRyu 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 11 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.4 15 529-539 (11 pages)
The effects of membrane surface charge originated from lipid head groups on ion channels were tested by analyzing the activity of single large conductance Ca2-activated K (maxi K) channel from rat skeletal muscle. The conductances and open-state probability (Po) of single maxi K channels were compared in three types of planar lipid bilayers formed from a neutral phosphatidylethanolamine (PE) or two negatively-charged phospholipids, phosphatidylserine (PS) and phosphatidylinositol... -
Altered Renal Nitric Oxide System in Experimental Hypertensive Rats
EunSukYang, JongUnLee, DaeGillKang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.4 7 455-460 (6 pages)
The present study was aimed at investigating whether the development of hypertension is related with an altered expression of nitric oxide synthases (NOS) in the kidney. By Western blot analysis, the expression of bNOS and ecNOS isoforms was determined in the kidney of deoxycorticosterone acetate (DOCA)-salt and two-kidney, one clip (2K1C) rats. In DOCA-salt hypertension, the expression of both bNOS and ecNOS was decreased, along with tissue contents of nitrites. In 2K1C hypertension, the... -
Hydroxyl Radical-Mediated Commitment of HL-60 Cells to Differentiation Modulation of Differentiation Process by Phosphodiesterase Inhibitors
YoungJinCho, WoongShickAhn, SeokHoCha, Kweon-HaengLee, WonIlKim, MyungHeeChung 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.3 12 369-376 (8 pages)
This report shows that hydroxyl radical, generated by a Fenton reaction involving adenosine 5'-diphosphate/Fe2+ complex (5-15 ㄍM) and H2O2 (2 ㄍM), induced differentiation of HL-60 cells in a dose- and time-dependent manner. This is evidenced by the increases in 12-O-tetradecanoylphorbol 13-acetate- and fMLP-stimulated superoxide production capability. The cells exposed to hydroxyl radical for defined periods (24∼96 hr) continued to differentiate even after the hydroxyl radical...
