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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... -
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)
a pungent ingredient of hot pepper, elicits an intense burning pain 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... -
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)
K currents play multiple roles in the excitability of dorsal root ganglion (DRG) neurons. Influences on these currents change the shape of the action potential, its firing threshold and the resting membrane potential. In this study, whole cell configuration of patch clamp technique had been applied to record the blocking effect of capsaicin, a lipophilic alkaloid, on the delayed rectifier K current in cultured small diameter DRG neurons of adult rat. Capsaicin reduced the amplitude... -
Calcium Modulates Excitatory Amino Acid (EAA)- and Substance P-induced Rat Dorsal Horn Cell Responses
HongKeeShin, SokHanKang, InDukChung, KeeSoonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 11 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.1 5 35-45 (11 pages)
rat. All the LT cells tested responded to kainate, whereas about 55% of low threshold (LT) cells responded to iontophoretically applied NMDA. NMDA and kainate excited almost all wide dynamic range (WDR) cells. These NMDA- and kainate-induced WDR cell responses were augmented by iontophoretically applied EGTA, but suppressed by Ca2, Mn2, verapamil and ω-conotoxin EVTA, effect of verapamil being more prominent and well sustained. Ca2 and Mn2 antagonized the augmenting... -
External pH Effects on Delayed Rectifier K+ Currents of Small Dorsal Root Ganglion Neuron of Rat
YoungHoKim, JungHyunHahn, InJaLim, SungkwonChung, HyoWeonBang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.2 4 165-172 (8 pages)
In this study, the whole cell configuration of the patch clamp technique has been applied to the recording of the responses of change of external pH on the delayed rectifier K+ current of cultured DRG neurons of rat. Outward K+ currents were examined in DRG cells, and the Charybdotoxin and Mn2+ could eliminate Ca2+-dependent K+ currents from outward K+ currents. This outward K+ current was activated around 60 mV by step depolarizing pulses from holding potential 70 mV. Outward K+... -
쥐 척수후각세포의 유해자극 반응에 대한 칼슘이온통로 차단제의 억제작용 Calcium Channel Blockers Suppress the Responses of Rat Dorsal Horn Cell to Nociceptive Input
신홍기, 강석한, 김기순, HongKeeShin, SokHanKang, KeeSoonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 13 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.6 3 625-637 (13 pages)
cells without any significant effects on the A-fiber responses. But ω-conotoxin MVIIC did not have any inhibitory actions on the responses of WDR cell to A-fiber, C-fiber and thermal stimulation. Iontophoretically applied EGTA augmented the WDR cell responses to C-fiber and thermal stimulations while spinal application of EGTA for about 20∼30 min strongly inhibited the C-fiber responses. The augmenting and the inhibitory actions of EGTA were blocked by calcium ions. The WDR cell responses to... -
신생흰쥐 척수후근신경절 세포에서 전압의존성 K+ 전류의 동정 Characterization of Voltage-Gated Potassium Currents in Dorsal Root Ganglion Neurons of Neonatal Rats
김지목, 정승준, 김상정, 김전, JimokKim, SungJunJung, SangJeongKim, JunKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 12 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.6 2 613-624 (12 pages)
Dorsal root ganglion (DRG) is composed of neuronal cell bodies of primary afferents with diverse functions. Various types of ion channels present on DRG neurons may reflect those functions. In the present study, voltage-gated potassium currents in DRG neurons of neonatal rats were characterized by whole-cell voltage clamp method. Two types of delayed rectifier and three types of transient potassium currents were identified according to their electrophysiological properties. The delayed rectifier... -
Histochemically-reactive Zinc in the Rat Dorsal Root Ganglion (DRG) Neurons: Zinc Selenium Autometallography
김이석, 조승묵, Kim. Yi-Suk, Jo. Seung-Mook 한국현미경학회 한국현미경학회지 5 Pages
한국현미경학회 한국현미경학회지 2010, Vol.40 No.1 15-19 (5 pages)
모든 신경절세포의 세포체는 한 층의 납작한 위성세포(satellite cell)에 의하여 둘러싸여 있었다. AMG 염색표본에서는 작은 신경절세포의 경우 강한 양성반응이 핵 주변부에서 관찰되었으나, 큰 신경절세포의 경우 전반적으로 미약한 AMG 양성반응을 보였고, 염색양상도 서로 달랐다. 그러나 큰 신경절세포를 둘러싸는 위성세포에서는 뚜렷한 AMG 양성반응이 관찰되었다. 이러한 조직화학적 본 연구의 결과는 zinc가 감각신경절인 랫드 척수신경절에서 통증을 포함한 감각의 전달과정에 의미있는 기능을 영위할 수 있음을 시사한다. -
아프리카 왕달팽이 (Achatina fulica) 뇌신경절 (Cerebral ganglion)의 미세구조
장남섭, Chang. Nam-Sub 한국현미경학회 한국전자현미경학회지 11 Pages
한국현미경학회 한국전자현미경학회지 1999, Vol.29 No.3 303-313 (11 pages)
green (BG) cell, yellow (Y) cell과 신경망(neuropils) 둥을 전자현미경을 통해 관찰한 결과는 다음과 같다. LG세포는 $60{mu}m$정도 크기의 원형 또는 난원형의 세포로서 핵과 세포질은 전자밀도가 낮아서 밝게 보였다. 핵질내에는 굵은 과립상의 염색질들이 고르게 발달해 있었고, 둥근 인도 관찰되었다. 세포질에는 평균 $0.4{mu}m$ 정도 크기의 전자밀도가 높은 둥근 과립들이 밀집되어 있었다. DG세포는 비교적 드물게 관찰되는 $50{mu}msim20{mu}m$정도 크기의 난원형의 세포로서 전자밀도가 비교적 높게 나타났다. 세포질 속에는... -
Calretinin-Immunoreactive Amacrine Cells and Ganglion Cells in the Greater Horseshoe Bat, Rhinolophus ferrumequinum
전영기, 전창진, Jeon. Young-Ki, Jeon. Chang-Jin 한국안광학회 한국안광학회지 7 Pages
한국안광학회 한국안광학회지 2007, Vol.12 No.4 133-139 (7 pages)
Calretinin의 생리적 역할은 아직 확립되지 않았지만, 칼슘 buffer로서의 작용과 칼슘 중재의 신호 변환에 적극적으로 작용하고 있다. Calretinin은 인간의 망막에서 성체 광수용체 세포와 이극세포, 수평세포에서 칼슘의 수송과 칼슘의 생리적 buffering으로서의 역할을 하고 있다. 본 연구에서 한국관 박쥐의 망막의 내핵층과 신경절세포층에서 calretinin의 면역세포화학반응 신경세포들과 그 분포 양상을 조사하여 우리는 박쥐 망막에서 calretinin에 면역세포화학반응을 일으키는 AII 무축삭세포를 내핵층에서 그리고...
