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Effect of glucose level on chemical hypoxia- and hydrogen peroxide-induced chemokine expression in human glioblastoma cell lines
YieunJung, So-HeeAhn, SangHuiPark, Youn-HeeChoi 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.5 6 509-518 (10 pages)
and differential concentration of glucose influence the expression of cytokines and chemokines, such as IL-6, IL-8, and IP-10, in human glial cell lines. Treatment with cobalt chloride (CoCl2) and hydrogen peroxide (H2O2) significantly increased the expression levels of IL-6, IL-8, and IP-10 in a dose-dependent manner in CRT-MG and U251-MG astroglioma cells, but not in microglia cells. Howeve... human glial cell lines. Treatment with cobalt chloride (CoCl2) and hydrogen peroxide (H2O2) significantly increased the expression levels of IL-6, IL-8, and IP-10 in a dose-dependent manner in CRT-MG and U251-MG astroglioma cells, but not in microglia cells. However, we found strikingly different patterns of expression of cytokines and chemokines between H2O2-treated CRT-MG cells cultured in low- and high-glucose medium. These results suggest that astroglioma and microglia cells exhibit distinct... -
Hydrogen peroxide attenuates refilling of intracellular calcium store in mouse pancreatic acinar cells
MiNaYoon, DongKwanKim, SeHoonKim, HyungSeoPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.2 11 233-239 (7 pages)
98 cells). These effects were irreversible even when H2O2 was washed out. Since, in preliminary study, only small proportion of cells were response to H 2O2 at 100 mM (34±3%, n=5, 73 cells), we used H2O2 at a concentration of 300 mM in the following studies. Additionally, pretreatment of antioxidants such as catalase at 30 Fig. 1. Effects of hydrogen peroxide (H2O2) and antioxidants on... effect of hydrogen peroxide (H2O2) on intracellular Ca2+ accumulation in mouse pancreatic acinar cells. Perfusion of H2O2 at 300 μM resulted in additional elevation of intracellular Ca2+ levels and termination of oscillatory Ca2+ signals induced by carbamylcholine (CCh) in the presence of normal extracellular Ca2+. Antioxidants, catalase or DTT, completely prevented H2O2-induced additional Ca2+ increase and termination of Ca2+ oscillation. In Ca2+-free medium, H2O2 still enhanced CCh-induced... -
Effects of hydrogen peroxide on voltage-dependent K+ currents in human cardiac fibroblasts through protein kinase pathways
HyemiBae, DongheeLee, Young-WonKim, JeongyoonChoi, HongJunLee, Sang-WookKim, TaehoKim, Yun-HeeNoh, Jae-HongKo, HyoweonBang, InjaLim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2016, Vol.20 No.3 11 315-324 (10 pages)
f broblasts Hydrogen peroxide K + currents Protein kinase ABSTRACT Human cardiac fibroblasts (HCFs) have various voltage-dependent K + channels (VDKCs) that can induce apoptosis. Hydrogen peroxide (H2O2) modulates VDKCs and induces oxidative stress, which is the main contributor to cardiac injury and cardiac remodeling. We investigated whether H 2O2 could modulate VDKCs in HCFs and induce... channels (VDKCs) that can induce apoptosis. Hydrogen peroxide (H2O2) modulates VDKCs and induces oxidative stress, which is the main contributor to cardiac injury and cardiac remodeling. We investigated whether H2O2 could modulate VDKCs in HCFs and induce cell injury through this process. In whole-cell mode patch-clamp recordings, application of H2O2 stimulated Ca2+-activated K+ (KCa) currents but not delayed rectifier K+ or transient outward K+ currents, all of which are VDKCs. H2O2-stimulated... -
Inhibition of Pacemaker Activity of Interstitial Cells of Cajal by Hydrogen Peroxide via Activating ATP-sensitive K+ Channels
SeokChoi, ShankarPrasadParajuli, HyeonSookCheong, DilliParasadPaudyal, CheolHoYeum, PyungJinYoon, JaeYeoulJun 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2007, Vol.11 No.1 3 15-20 (6 pages)
Physiol Pharmacol Vol 11: 15－20, February, 2007 INTRODUCTION Hydrogen peroxide (H2O2)generated during normal cellu- lar metabolism is widespread,and may evoke the destruc- tion ofmany cell types through necrotic or apoptotic process when present in excess (Olanow, 1992; Castagne et al, 1999). Many studies suggested that H2O2 has an important role in gastrointestinal (GI)inflammation process:H2O2... To investigate whether hydrogen peroxide (H2O2) affects intestinal motility, pacemaker currents and membrane potential were recorded in cultured interstitial cells of Cajal (ICC) from murine small intestine by using a whole-cell patch clamp. In whole cell patch technique at 30oC, ICC generated spontaneous pacemaker potential under current clamp mode (I=0) and inward currents (pacemaker currents) under voltage clamp mode at a holding potential of 70 mV. When ICC were treated with H2O2 in... -
Promoting Effect of Hydrogen Peroxide on 1-Methyl-4-phenylpyridinium-induced Mitochondrial Dysfunction and Cell Death in PC12 Cells
DongHeeLee, ChungSooLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2006, Vol.10 No.1 9 51-57 (7 pages)
of DNA fragments were detected as described in Methods. Data are expressed as absorbance and represent means±SEM (n=6). +P＜0.05 compared to control; and *P＜0.05 compared to MPP + alone. Conc. of H2O2 (M) 0 2 5 5 0 7 5 3'-ends of DNA fragments (A 450 ) 0.0 0.2 0.3 0.4 H2O2 MPP + + H 2O2 + + + + * * * B ..PAGE:5 Enhancement of MPP + Toxicity by Hydrogen Peroxide 55 the increase in the cytochrom... The promoting effect of hydrogen peroxide (H2O2) against the cytotoxicity of 1-methyl-4-phenylpyridinium (MPP) in differentiated PC12 cells was assessed by measuring the effect on the mitochondrial membrane permeability. Treatment of PC12 cells with MPP resulted in the nuclear damage, decrease in the mitochondrial transmembrane potential, cytosolic accumulation of cytochrome c, activation of caspase-3, increase in the formation of reactive oxygen species (ROS) and depletion of GSH.... -
TASK-1 Channel Promotes Hydrogen Peroxide Induced Apoptosis
JihyunYun, SeungtaeKim, HyoweonBang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.1 9 63-67 (5 pages)
exposed to H 2O2 (1∼1000 μM) for 20 min. Cell viability was measured with the cytotoxicity assay and plotted against the corresponding H 2O2 concentration. As ..PAGE:3 A K + Current Related to Hydrogen Peroxide Induced Apoptosis 65 Fig. 2. Effect of lowing pH effect on H2O2-induced cell death o f HEK-293 () and TASK-1 () cells. Dose-response curve of HEK- 293 cells is shifted to the left by... Hydrogen peroxide (H2O2) causes oxidative stress and is considered as an inducer of cell death in various tissues. Two-pore domain K (K2p) channels may mediate K efflux during apoptotic volume decreases (AVD) in zygotes and in mouse embryos. In the present study, we sought to elucidate linkage between K2p channels and cell death by H2O2. Thus K2p channels (TASK-1, TASK-3, TREK-1, TREK-2) were stably transfected in HEK-293 cells, and cytotoxicity assay was preformed using cell... -
Hydrogen Peroxide Prompted Lignification Affects Pathogenicity of Hemi-biotrophic Pathogen Bipolaris sorokiniana to Wheat
Ajit Poudel, Sudhir Navathz, Ramesh Chand, Vinod K. Mishra, Pawan K. Singh, Arun K. Joshi 한국식물병리학회 The Plant Pathology Journal 14 Pages
한국식물병리학회 The Plant Pathology Journal 2019, 35권 4호 1 287-300 (14 pages)
= 19.626 and for time = 7.2889. (C) Hydrogen peroxide (H2O2) production. The plot is based on mean H2O2 accumulation in resistant and susceptible genotypes. LSD (0.05) for genotype = 0.3143 and for time = 0.1167. (D) Lignin accumulation. The plot is based on mean H2O2 accumulation in re- sistant and susceptible genotypes. LSD (0.05) for genotype = 18.479 and for time = 6.8629. Data from two... resistant and susceptible genotypes and its association with free radicals such as hydrogen peroxide (H2O2), superoxide (O2 -) and hydroxyl radical (OH-) were studied after inoculation under field conditions for two consecutive years. H2O2 significantly influenced lignin content in flag leaves, whereas there was a negative correlation among lignin and H2O2 to the Area Under Disease Progress Curve (AUDPC). The production of H2O2 was higher in the resistant genotypes than susceptible ones. The O2... -
Open Access : Hydrogen Peroxide- and Nitric Oxide-mediated Disease Control of Bacterial Wilt in Tomato Plants
한국식물병리학회 The Plant Pathology Journal 11 Pages
한국식물병리학회 The Plant Pathology Journal 2013, 29권 4호 4 386-396 (11 pages)
Reactive oxygen species (ROS) generation in tomato plants by Ralstonia solanacearum infection and the role of hydrogen peroxide (H2O2) and nitric oxide in tomato bacterial wilt control were demonstrated. During disease development of tomato bacterial wilt, accumulation of superoxide anion (O2 ) and H2O2 was observed and lipid peroxidation also occurred in the tomato leaf tissues. High doses of H... Reactive oxygen species (ROS) generation in tomato plants by Ralstonia solanacearum infection and the role of hydrogen peroxide (H2O2) and nitric oxide in tomato bacterial wilt control were demonstrated. During disease development of tomato bacterial wilt, accumulation of superoxide anion (O2 -) and H2O2 was observed and lipid peroxidation also occurred in the tomato leaf tissues. High doses of H2O2 and sodium nitroprusside (SNP) nitric oxide donor showed phytotoxicity to detached tomato leaves... -
Resistance of Fusarium fujikuroi Isolates to Hydrogen Peroxide and Its Application for Fungal Isolation
한국식물병리학회 식물병연구 2015, 21권 3호 8 227-230 (4 pages)
a selective medium for isolating only F. fujikuroi. Our working hypothesis was that hydrogen peroxide (H2O2) might be used for selective isolation of F. fujikuroi because Fusarium species showed different levels of resistance to toxo- flavin which produces H2O2 in eukaryotic cells (Jung et al., 2013; *Corresponding author Tel : +82-51-200-7554 Fax: +82-51-200-7505 E-mail: jungle@dau.ac.kr...