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Alteration of Striatal Tetrahydrobiopterin in Iron-Induced Unilateral Model of Parkinson’s Disease
BijayAryal, Jin-KooLee, , HakRimKim, , Hyung-GunKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2014, Vol.18 No.2 6 129-134 (6 pages)
It has been suggested that transition metal ions such as iron can produce an oxidative injuries to nigrostriatal dopaminergic neurons, like Parkinson’s disease (PD) and subsequent compensative increase of tetrahydrobiopterin (BH4) during the disease progression induces the aggravation of dopaminergic neurodegeneration in striatum. It had been established that the direct administration of BH4 into neuron would induce the neuronal toxicity in vitro. To elucidate a role of BH4 in patho-genesis in... -
Nitric Oxide-Induced Apoptosis of Human Dental Pulp Cells Is Mediated by the Mitochondria-Dependent Pathway
MinYoungPark, YeonJinJeong, GiChangKang, Mi-HwaKim, SunHunKim, Hyun-JuChung, JiYeonJung, WonJaeKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2014, Vol.18 No.1 3 25-32 (8 pages)
Nitric oxide (NO) is recognized as a mediator and regulator of inflammatory responses. NO is produced by nitric oxide synthase (NOS), and NOS is abundantly expressed in the human dental pulp cells (HDPCs). NO produced by NOS can be cytotoxic at higher concentrations to HDPCs. However, the mechanism by which this cytotoxic pathway is activated in cells exposed to NO is not known. The purpose of this study was to elucidate the NO-induced cytotoxic mechanism in HDPCs. Sodium nitroprusside (SNP), a... -
Synergistic Induction of iNOS by IFN-g and Glycoprotein Isolated from Dioscorea batatas
PhamThiThuHuong, MinYoungLee, KunYeongLee, InYoupChang, SeogKiLee, SangPilYoon, Dong-CheolLee, YoungJinJeon 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.6 9 431-436 (6 pages)
Dioscorea species continue to be used in traditional Chinese medicine, and represent a major source of steroid precursors for conventional medicine. In the previous study, We isolated glycoprotein (GDB) from Dioscorea batatas, characterized, and demonstrated immunostimulating activity in C57BL/6 mice. The aim of this study was to investigate the mechanism whereby GDB activates macrophages. Macrophages activation by GDB was investigated by analyzing the effects of GDB on nitric oxide (NO)... -
Dipeptides Inhibit Melanin Synthesis in Mel-Ab Cells through Down-Regulation of Tyrosinase
Hyun-eLee, Eun-HyunKim, Hye-RyungChoi, UyDongSohn, Hye-YoungYun, KwangJinBaek, NyounSooKwon, Kyoung-ChanPark, Dong-SeokKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.4 9 287-291 (5 pages)
This study investigated the effects of proline-serine (PS) and valine-serine (VS) dipeptides on melanogenesis in Mel-Ab cells. Proline-serine and VS significantly inhibited melanin synthesis in a concentration-dependent manner, though neither dipeptide directly inhibited tyrosinase activity in a cell-free system. Both PS and VS down-regulated the expression of microphthalmia-associated transcription factor (MITF) and tyrosinase. In a follow-up study also described here, the effects of these... -
Induction of the Intrinsic Apoptotic Pathway by 3-Deazaadenosine Is Mediated by BAX Activation in HL-60 Cells
Sun-YoungLee, Kyoung-WonKo, Won-KyungKang, Yun-JeongChoe, Yoon-HyoungKim, In-KyungKim, JinKim, Ho-ShikKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.6 9 407-412 (6 pages)
3-Deazaadenosine (DZA), a potent inhibitor of S-adenosylhomocysteine hydrolase, was previously proposed to induce intrinsic apoptosis in human leukemic cells. In the present study, we analyzed the mechanism underlying the DZA-induced intrinsic apoptotic pathway. DZA activated typical caspase-dependent apoptosis in HL-60 cells, as demonstrated by an accumulation of hypo-diploidic cells, the processing of multiple procaspases and an inhibitory effect of z-VAD-Fmk on this cell death. During... -
Magnolol Inhibits LPS-induced NF-κB/Rel Activation by Blocking p38 Kinase in Murine Macrophages
MeiHongLi, GuganKothan, SeungJooCho, PhamThiThuHuong, YongHaiNan, KunYeongLee, SongYubShin, SungSuYea, YoungJinJeon 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.6 1 353-358 (6 pages)
This study demonstrates the ability of magnolol, a hydroxylated biphenyl compound isolated from Magnolia officinalis, to inhibit LPS-induced expression of iNOS gene and activation of NF-ՊB/Rel in RAW 264.7 cells. Immunohisto-chemical staining of iNOS and Western blot analysis showed magnolol to inhibit iNOS gene expression. Reporter gene assay and electrophoretic mobility shift assay showed that magnolol inhibited NF-ՊB/Rel transcriptional activation and DNA binding, respectively.... -
Regional Differences in Mitochondrial Anti-oxidant State during Ischemic Preconditioning in Rat Heart
VuThiThu, DangVanCuong, NariKim, JaeBoumYoum, MohamadWarda, WonSunPark, JaeHongKo, EuiyongKim, JinHan 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2007, Vol.11 No.2 3 57-64 (8 pages)
Ischemic preconditioning (IPC) is known to protect the heart against ischemia/reperfusion (IR)-induced injuries, and regional differences in the mitochondrial antioxidant state during IR or IPC may promote the death or survival of viable and infarcted cardiac tissues under oxidative stress. To date, however, the interplay between the mitochondrial antioxidant enzyme system and the level of reactive oxygen species (ROS) in the body has not yet been resolved. In the present study, we examined the... -
Nitric Oxide Synthase Mediates Carbon Monoxide-Induced Stimulation of L-type Calcium Currents in Human Jejunal Smooth Muscle Cells
InjaLim, JihyunYun, SeungtaeKim, SoonchulMyung, TaehoKim, HyoweonBang 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2004, Vol.8 No.3 7 161-166 (6 pages)
Exogenous carbon monoxide (0.2%) increases L-type calcium (Ca2) current in human jejunal circular smooth muscle cells. The stimulatory effect of carbon monoxide (CO) on L-type Ca2 current is inhibited by pre-application of L-NNA, a classical competitive inhibitor of nitric oxide synthase (NOS) with no significant isoform selectivity (Lim, 2003). In the present study, we investigated which isoform of NOS affected CO induced stimulation of L-type Ca2 current in human jejunal... -
The Role of Lipid Peroxidation and Glutathione on the Glycochenodeoxycholic Acid-Induced Cell Death in Primary Cultured Rat Hepatocytes
SangHuiChu, WolMiPark, KyungEunLee, YoungSookPae 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.2 6 121-127 (7 pages)
Intracellular accumulation of bile acids in the hepatocytes during cholestasis is thought to be pathogenic in cholestatic liver diseases. The objective of this study was to determine the role of lipid peroxidation and glutathione on the bile acid-induced hepatic cell death mechanism in primary cultured rat hepatocytes. To induce hepatic cell death, we incubated primary cultured rat hepatocytes with glycochenodeoxycholic acid (GCDC; 0∼400μM) for 3 hours. In electron microscopic examination and... -
Lipid Peroxidation, NF-κB Activation and Cytokine Production in Neutrophil-Stimulated Pancreatic Acinar Cells
HyeyoungKim, JeongYeonSeo, SeHaengCho, KyungHwanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1999, Vol.3 No.5 9 521-528 (8 pages)
Reactive oxygen species (ROS), generated by infiltrating neutrophils, are considered as an important regulator in the pathogenesis and deveolpment of pancreatitis. The present study aims to investigate whether neutrophils primed by 4β-phorbol 12β-myristate 13α-acetate (PMA) affect the productions H2O2 and lipid peroxide (LPO), NF-κB activation and cytokine production in pancreatic acinar cells, and whether these alterations were inhibited by an antioxidant, N-acetylcysteine (NAC) and...
