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Acute Hypoxia Activates an ENaC-like Channel in Rat Pheochromocytoma (PC12) Cells
YeonJuBae, Jae-ChealYoo, NammiPark, DawonKang, JaeheeHan, EunmiHwang, Jae-YongPark, Seong-GeunHong 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.1 9 57-64 (8 pages)
Cells can resist and even recover from stress induced by acute hypoxia, whereas chronic hypoxia often leads to irreversible damage and eventually death. Although little is known about the response(s) to acute hypoxia in neuronal cells, alterations in ion channel activity could be preferential. This study aimed to elucidate which channel type is involved in the response to acute hypoxia in rat pheochromocytomal (PC12) cells as a neuronal cell model. Using perfusing solution saturated with 95% N2... -
Amphetamine-induced ERM Proteins Phosphorylation Is through PKCb Activation in PC12 Cells
HaJinJeong, Jeong-HoonKim, SongheeJeon 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.4 7 245-249 (5 pages)
Amphetamine, a synthetic psychostimulant, is transported by the dopamine transporter (DAT) to the cytosol and increases the exchange of extracellular amphetamine by intracellular dopamine. Recently, we reported that the phosphorylation levels of ezrin-radixin-moesin (ERM) proteins are regulated by psychostimulant drugs in the nucleus accumbens, a brain area important for drug addiction. However, the significance of ERM proteins phosphorylation in response to drugs of abuse has not been fully... -
Octyl Gallate Inhibits ATP-induced Intracellular Calcium Increase in PC12 Cells by Inhibiting Multiple Pathways
YujieGuo, YiJaeHong, Hyun-JongJang, Myung-JunKim, Duck-JooRhie, Yang-HyeokJo, SangJuneHahn, ShinHeeYoon 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.1 4 21-28 (8 pages)
Phenolic compounds affect intracellular free Ca2＋ concentration ([Ca2＋]i) signaling. The study examined whether the simple phenolic compound octyl gallate affects ATP-induced Ca2＋ signaling in PC12 cells using fura-2-based digital Ca2＋ imaging and whole-cell patch clamping. Treatment with ATP (100</SUP>ՌM) for 90 s induced increases in [Ca2＋]i in PC12 cells. Pretreatment with octyl gallate (100 nM to 20ՌM) for 10 min inhibited the ATP-induced [Ca2＋]i response in a... -
Involvement of Caspases and Bcl-2 Family in Nitric Oxide-Induced Apoptosis of Rat PC12 Cells
Yeon-JinJeong, Ji-YeonJung, Jin-HaLee, Jin-HyoungCho, Guem-SugLee, Sun-HunKim, Won-JaeKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2006, Vol.10 No.6 6 329-336 (8 pages)
This study was aimed to investigate the nitric oxide (NO)-induced cytotoxic mechanism in PC12 cells. Sodium nitroprusside (SNP), an NO donor, decreased the viability of PC12 cells in dose- and time- dependent manners. SNP enhanced the production of reactive oxygen species (ROS), and gave rise to apoptotic morphological changes including cell shrinkage, chromatin condensation, and DNA fragmentation. Expression of Bax was not affected, whereas Bcl-2 was downregulated in SNP-treated PC12 cells. SNP... -
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)
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.... -
PKA-Mediated Regulation of B/K Gene Transcription in PC12 Cells
Mi-HyunChoi, Ho-ShikKim, Sung-HoChoi, Mi-YoungKim, Yoon-SeongJang, Young-MinJang, Jeong-HwaLee, Seong-WhanJeong, In-KyungKim, Oh-JooKwon 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.6 4 333-340 (8 pages)
B/K protein is a novel protein containing double C2-like domains. We examined the specific signaling pathway that regulates the transcription of B/K in PC12 cells. When the cells were treated with forskolin (50μM), B/K mRNA and protein levels were time-dependently decreased, reaching the lowest level at 3 or 4 hr, and thereafter returning to the control level. Chemicals such as dibutyryl-cAMP, cell- permeable cyclic AMP (cAMP) analogue and CGS21680, adenosine receptor A2A agonist, also... -
Differential Inhibition of MPP+- or 6-Hydroxydopamine-induced Cell Viability Loss in PC12 Cells by Trifluoperazine and W-7
ChungSooLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.4 9 247-252 (6 pages)
The present study assessed the effect of calmodulin antagonists trifluoperazine and W-7 against the cytotoxicity of MPP and 6-hydroxydopamine (6-OHDA) in relation to the mitochondrial dysfunction and cell death in PC12 cells. Trifluoperazine (an inhibitor of the mitochondrial permeability transition and calmodulin antagonist) and W-7 (a specific calmodulin antagonist) significantly attenuated the MPP- induced cell viability loss in PC12 cells with a maximum inhibition at 0.5∼1μM;... -
Efffects of Fluoxetine on ATP-induced Calcium Signaling in PC12 Cells
Yeo-MinLee, HeeJungKim, SunHwaHong, Myung-JunKim, DoSikMin, Duck-Joo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2004, Vol.8 No.1 9 57-63 (7 pages)
Fluoxetine, a widely used anti-depressant compound, has several additional effects, including blockade of voltage-gated ion channels. We examined whether fluoxetine affects ATP-induced calcium signaling in PC12 cells by using fura-2-based digital calcium imaging and assay for [3H]-inositol phosphates (IPs). Treatment with ATP (100μM) for 2 min induced [Ca2]i increases. The ATP-induced [Ca2]i increases were significantly decreased by removal of extracellular Ca2 and... -
Neurotrophic and Neuritogenic Effects of Water Extracts of Rhizoma of Coptis chinensis Franch in PC12 Cells
Gee-YounKwon, Byung-KilChoe, Soo-KyungKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.3 9 175-179 (5 pages)
Coptis chinensis (CC) is one of the traditional herbs used in Oriental medicine for the treatment of gastrointestinal disorders, anxiety, and insomnia. In this study, neurotrophic and neuritogenic effects of CC on rat pheochromocytoma (PC12) cells were evaluated. Pretreatment of PC12 cells with water extracts of CC (120μg /ml) produced considerable outgrowth of neurites that is comparable to the effect of nerve growth factor (NGF). Therefore, neurite outgrowth was quantified and expression of... -
Overexpressed Mitochondrial Thioredoxin Protects PC12 Cells from Hydrogen Peroxide and Serum-deprivation
Yun-SongLee, Seung-AYu 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.1 7 33-37 (5 pages)
Oxidative damage to mitochondria is a critical mechanism in necrotic or apoptotic cell death induced by many kinds of toxic chemicals. Thioredoxin (Trx) family proteins are known to play protective roles in organisms under oxidative stress through redox reaction by using reducing equivalents of cysteines at a conserved active site, Cys-X-X-Cys. Whereas biological and physiological properties of Trx1 are well characterized, significance of mitochondrial thioredoxin (Trx2) is not well known....
