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A Novel Nicotinamide Adenine Dinucleotide Correction Method for Mitochondrial Ca2+ Measurement with FURA-2-FF in Single Permeabilized Ventricular Myocytes of Rat
JeongHoonLee, JeongMiHa, ChaeHunLeem 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2015, Vol.19 No.4 10 373-382 (10 pages)
Fura-2 analogs are ratiometric fluoroprobes that are widely used for the quantitative measurement of [Ca2+]. However, the dye usage is intrinsically limited, as the dyes require ultraviolet (UV) excitation, which can also generate great interference, mainly from nicotinamide adenine dinucleotide (NADH) autofluorescence. Specifically, this limitation causes serious problems for the quantitative measurement of mitochondrial [Ca2+], as no available ratiometric dyes are excited in the visible range.... -
Potassium Currents in Isolated Deiters' Cells of Guinea Pig
JongWooChung, EuiCholNam, WonTaeKim, JaeBoumYoum, ChaeHunLeem 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.6 10 537-546 (10 pages)
Deiters' cells are the supporting cells in organ of Corti and are suggested to play an important role in biochemical and mechanical modulation of outer hair cells. We successfully isolated functionally different K+ currents from Deiters’ cells of guinea pig using whole cell patch clamp technique. With high K+ pipette solution, depolarizing step pulses activated strongly outward rectifying currents which were dose-dependently blocked by clofilium, a class III anti-arrhythmic K+ channel blocker.... -
The Effect of Methanol on the Structural Parameters of Neuronal Membrane Lipid Bilayers
Hyung-JinJoo, Shin-HoAhn, Hang-RaeLee, Sung-WooJung, Chang-WonChoi, Min-SeokKim, Moon-KyoungBae, In-KyoChung, Soo-KyoungBae, Hye-OckJang, 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.4 5 255-264 (10 pages)
The structures of the intact synaptosomal plasma membrane vesicles (SPMVs) isolated from bovine cerebral cortexs, and the outer and the inner monolayer separately, were evaluated with 1,6-diphenyl- 1,3,5-hexatriene (DPH) and 1,3-di(1-pyrenyl)propane (Py-3-Py) as fluorescent reporters and trinitrophenyl groups as quenching agents. The methanol increased bulk rotational and lateral mobilities of SPMVs lipid bilayers. The methanol increased the rotational and lateral mobilities of the outer... -
뱀 (파충류) 골격근 소포체 칼슘유리 채널
남장현(Jang Hyeon Nam), 석정호(Jeong Ho Seok) 대한약리학회 대한약리학잡지 10 Pages
대한약리학회 대한약리학잡지 1996, 제 32권 제 1호 7 57-66 (10 pages)
파충류 골격근의 근소포체에서 칼슘유리 채널의 존재를 밝히고저 뱀 골격근에서 근소포체를 분리하여 SDS-PAGE 전기영동, RyR의 정제, [3H]ryanodine 결합실험 및 45Ca 유리 실험으로 아래와 같은 결과를 얻었다. 1) 뱀골격근 소포체도 단일 band의 high molecular weight 단백을 가지고 있고, 그 mobility는 포유류 골격근의 것과 유사했다. 2) RyR의 정제과정에서 얻어진 [3H]ryanodine의 peak 결합 분획에서 high molecular weight의 단백분획이 발견되었다. 3) 뱀 골격근 SR vesicles에 대한 [3H]ryanodine의 maximum binding site와... -
Barbiturates가 생체세포막 외측 단층의 소수성 부위와 친수성 부위에 분포되는 상대적 비율
윤일(Il Yun), 이병우(Byung Woo Lee) 대한약리학회 대한약리학잡지 8 Pages
대한약리학회 대한약리학잡지 1995, 제 31권 제 3호 1 271-278 (8 pages)
Barbiturates의 분자적 약리학적 작용기전 연구에 기초자료를 제공키 위하여 본연구를 수행하였다. 분자적 약리작용 기전 연구에서는 무엇보다도 선행되어야 하는 것이 barbiturates가 신경세포막에서 어느 부위에 주로 분포되는가를 알아내는 데에 있다. 쥐(Rat)의 뇌로부터 분리한 synaptosomal plasma membrane vesicles (RSPMV)를 분리한 후 이 RSPMV 외측 단층(outer monolayer)의 소수성 부위와 친수성 부위에 barbiturates가 분포되는 경향을 형광 probe 법으로 검색하였다. 세포막 외측 단층의 친수성 부위에 분포되는 형광 probe... -
Transepithelial Transport of Organic Cation and Its Inhibition by Sulfhydryl and Carboxyl Reagents in Opossum Kidney Cell Monolayer
Woo, Jae-Suk, Oh, Se-Ok, Jung, Jin-Sup, Kim, Yong-Keun, Lee, Sang-Ho 대한생리학회 대한생리학회지 10 Pages
대한생리학회 대한생리학회지 1996, 제 30권 제 1호 6 53-62 (10 pages)
Transepithelial transport of tetraethylammonium (TEA) was studied in monolayers of opossum kidney cells cultured on permeable membrane filters. [14C]-TEA was transported across the OK cell monolayer from basolateral to apical side by a saturable process which can be stimulated by acidification of the apical medium. The apparent Michaelis-Menten constant (Km) and the maximum velocity(Vmax) for the transport were 41 μM and 147 pmole/ mg protein/ min, respectively. The transport was significantly... -
Rapid Measurement of NH3 and Weak Acid Permeation Through Liposomes and Renal Proximal Tubule Membranes
Bae, Hae-Rahn, Suh, Duck-Joon, Lee, Sang-Ho 대한생리학회 대한생리학회지 12 Pages
대한생리학회 대한생리학회지 1994, 제 28권 제 2호 11 203-214 (12 pages)
Using the methods of stopped-flow and epifluorescence microscopy with entrapped fluorophore, membrane permeability of NH3 and weak acids in liposomes, renal brush border (BBMV) and basolateral membrane vesicles (BLMV), and primary culture cells from renal proximal tubule was measured. Permeability coefficient (cm/sec) of NH3 was (2.9 X 10-2 in phosphatidylcholine liposome 25℃), 5.9 X 10-2 in renal proximal tubule cell (37℃), 4.0 X 10-2 and 2.4 X 10-2 in BBMV and BLMV (25℃), respectively....
