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Oxidized Low-density Lipoprotein- and Lysophosphatidylcholine-induced Ca2＋ Mobilization in Human Endothelial Cells
MoonYoungKim, GuoHuaLiang, JiAeeKim, SooSeungChoi, ShinkuChoi, SukHyoSuh 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2009, Vol.13 No.1 5 27-32 (6 pages)
The effects of oxidized low-density lipoprotein (OxLDL) and its major lipid constituent lysophosphatidylcholine (LPC) on Ca2＋ entry were investigated in cultured human umbilical endothelial cells (HUVECs) using fura-2 fluorescence and patch-clamp methods. OxLDL or LPC increased intracellular Ca2＋ concentration ([Ca2＋]i), and the increase of [Ca2＋]i by OxLDL or by LPC was inhibited by La3＋ or heparin. LPC failed to increase [Ca2＋]i in the presence of an antioxidant tempol. In addition,... -
Lysophosphatidylcholine Increases Ca2+ Current via Activation of Protein Kinase C in Rabbit Portal Vein Smooth Muscle Cells
SeungsooJung, YounghoLee, SungsikHan, YoungwhanKim, TaiksangNam, DucksunAhn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 4 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.1 5 31-34 (4 pages)
Lysophosphatidylcholine (LPC), a metabolite of membrane phospholipids by phospholipase A2, has been considered responsible for the development of abnormal vascular reactivity during atherosclerosis. Ca2+ influx was shown to be augmented in atherosclerotic artery which might be responsible for abnormal vascular reactivity. However, the mechanism underlying Ca2+ influx change in atherosclerotic artery remains undetermined. The purpose of the present study was to examine the effects of LPC on... -
Lysophosphatidylcholine Attenuates Endothelium-dependent Relaxation Responses through Inhibition of ACh-induced Endothelial [Ca2+]i Increase
Seong-ChunKwon, Yong-HoLee, TaicksangNam, Duck-SunAhn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2006, Vol.10 No.1 5 25-30 (6 pages)
Lysophosphatidylcholine (LPC), which accumulates in atherosclerotic arteries, has been reported to inhibit endothelium-dependent relaxation (EDR) in many different species. However, the underlying mechanism of LPC-induced inhibition of EDR is still uncertain. In the present study, we measured simultaneously both isometric tension and cytosolic free Ca2 ([Ca2]i) in rabbit carotid strips, and examined the effect of LPC on tension and [Ca2]i. In carotid strips with... -
Increase of Intracellular Ca2+ Concentration Induced by Lysophosphatidylcholine in Murine Aortic Endothelial Cells
MeiHongZhu, SungJinPark, HyunJinKim, DongKiYang, SukHyoSuh, InsukSo, KiWhanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2002, Vol.6 No.2 5 93-100 (8 pages)
oxidized low-density lipoprotein (ox-LDL), l-α-stearoyl-lysophosphatidylcholine (LPC), on intracellular Ca2 concentration were examined in mouse endothelial cells by measuring intracellular Ca2 concentration ([Ca2]i) with fura 2-AM and reverse transcription-polymerase chain reaction (RT-PCR). LPC increased [Ca2]i under the condition of 1.5 mM [Ca2]o but did not show any effect under the nominally Ca2-free condition. Even after the store depletion with... -
Expression and regulation of Enpp2 in rat uterus during the estrous cycle
Hyo-Jin Ahn, Hyun Yang, Beum-Soo An, Kyung-Chul Choi, Eui-Bae Jeung* 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2011, 제 12권 제 4호 11 379-385 (7 pages)
D that transforms lysophosphatidylcholine into lysophospatidic acid. Although multiple analyses have investigated the function of Enpp2 in the hypothalamus, its role in the uterus during the estrous cycle is not well understood. In the present study, rat uterine Enpp2 was analyzed by RT-PCR, Western blotting, and immunohistochemistry. Quantitative PCR analysis demonstrated that uterine Enpp2 mRNA was decreased during estrus compared to proestrus and diestrus. To determine whether uterine Enpp2... -
Contradictory Effects of Superoxide and Hydrogen Peroxide on KCa3.1 in Human Endothelial Cells
ShinkyuChoi, Hye-YoungNa, JiAeeKim, Sung-EunCho, SukHyoSuh 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.3 1 181-187 (7 pages)
primary cultured human umbilical vein endothelial cells (HUVECs). The hydrogen peroxide donor, tert-butyl hydroperoxide (TBHP), upregulated KCa3.1 expression, while the superoxide donors, xanthine/xanthine oxidase mixture (X/XO) and lysophosphatidylcholine (LPC), downregulated its expression, in a concentration-dependent manner. These ROS donor effects were prevented by antioxidants or superoxide dismustase. Phosphorylated extracellular signal-regulated kinase (pERK) was upregulated by TBHP and... -
Signaling Pathway of Lysophosphatidic Acid-Induced Contraction in Feline Esophageal Smooth Muscle Cells
YunSungNam, JungSookSuh, HyunJuSong, UyDongSohn 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.2 5 139-147 (9 pages)
Lysolipids such as LPA, S1P and SPC have diverse biological activities including cell proliferation, differentiation, and migration. We investigated signaling pathways of LPA-induced contraction in feline esophageal smooth muscle cells. We used freshly isolated smooth muscle cells and permeabilized cells from cat esophagus to measure the length of cells. Maximal contraction occurred at 10−6 M and the response peaked at 30s. To identify LPA receptor subtypes in cells, western blot analysis...
