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Choi YH, Kho MC, Park JH, Cho KW, Kang DG, Lee HS. Effect of oleanolic acid on the regulation of water, electrolyte and the renin system (701.4). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.701.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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102
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Jin SW, Choi YH, Lee DH. Utilization of rapid infusion system with cold saline in the induction of therapeutic hypothermia. J Int Med Res 2014; 42:744-9. [PMID: 24670537 DOI: 10.1177/0300060514525760] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2013] [Accepted: 02/05/2014] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE To examine the cooling effectiveness of a rapid infusion system (RIS) during induction of therapeutic hypothermia. METHODS This laboratory study simulated the effect of three fluid delivery methods: rapid dripping without any other equipment (control); RIS; pressure bag. Cold energy loss (℃ × min) was calculated as: (temperature of the proximal thermoprobe--temperature of the distal thermoprobe) × (total infusion time). RESULTS Infusion time was significantly shorter and cold energy loss significantly lower in the RIS group than in the two other groups. CONCLUSIONS RIS preserves the cold energy of fluid more effectively than pressure bag or control. RIS allows for rapid infusion at a constant pressure and can be easily applied in an emergency setting.
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Ku NS, Choi YH, Kim YK, Choi JP, Kim JM, Choi JY. Incidence of and risk factors for active tuberculosis in human immunodeficiency virus-infected patients in South Korea. Int J Tuberc Lung Dis 2013; 17:777-81. [PMID: 23676161 DOI: 10.5588/ijtld.12.0607] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In South Korea, a high-income country with an intermediate tuberculosis (TB) burden and low human immunodeficiency virus (HIV) prevalence, studies on incidence and risk factors of TB in HIV-infected persons have rarely been reported. OBJECTIVE To investigate the incidence of and risk factors for active TB in HIV-infected persons in South Korea. METHODS A retrospective analysis was conducted of 1265 HIV-1 infected patients who visited four hospitals in South Korea between 1985 and 2012. We analysed the incidence of TB during the follow-up period. To investigate risk factors associated with active TB, we conducted a 1:2 matched case-control study of HIV-infected patients with newly active TB and controls without active TB who had similar CD4(+) T-cell counts and dates of first visit. RESULTS Over a total of 4457 person-years (py), 185 (14.6%) subjects were diagnosed with active TB; the incidence was 4.2 cases/100 py. In multivariate analysis, low body mass index (P = 0.033) and current smoking (P = 0.003) were independent risk factors for TB in HIV-infected patients. CONCLUSION Further strategies on prevention and treatment of active TB among HIV-infected patients should be implemented in South Korea. Encouraging smoking cessation and supporting good nutrition may be ways to reduce the incidence of active TB in HIV-infected patients.
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Yang MH, Cho J, Choi YH, Son HJ, Rhee JC, Sung J. The association between coronary artery calcification and colorectal adenoma. HEPATO-GASTROENTEROLOGY 2013; 60:538-42. [PMID: 23108081 DOI: 10.5754/hge12709] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND/AIMS Both colorectal neoplasm and coronary artery disease are prevalent diseases worldwide and share several risk factors. The aim of this study was to investigate the association between coronary artery calcification and prevalence of colorectal adenoma. METHODOLOGY We retrospectively evaluated 3,092 subjects who underwent colonoscopy and coronary artery calcium computed tomography (CT) on the same day or within a 3-month interval, during routine check-ups between January 2006 and June 2009 at the Center for Health Promotion of the Samsung Medical Center. Multivariate logistic regression analysis was used to calculate adjusted odds ratios (ORs). RESULTS Colorectal adenomas were detected in 1,067 (34.5%) of the 3,092 subjects, including 536 (41.0%) individuals with and 531 (29.7%) without coronary calcification (p<0.001). Multiple logistic regression analysis showed that the presence of coronary artery calcification (OR=1.346; 95% confidence interval [CI]=1.122-1.614), age ≥50 years (OR=1.516; 95% CI=1.256-1.829), waist circumference of 90-99cm (OR=1.364; 95% CI=1.008-1.844) and current smoker (OR=1.266; 95% CI=1.045-1.534) were associated with the prevalence of colorectal adenoma. CONCLUSIONS The prevalence of colorectal adenoma is significantly higher in patients with coronary artery calcification. Our results support positive relationship between coronary artery disease and colorectal adenoma.
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Park I, Ryu MH, Choi YH, Kang HJ, Yook JH, Park YS, Kim HJ, Jung HY, Lee GH, Kim KC, Kim BS, Kang YK. A phase II study of neoadjuvant docetaxel, oxaliplatin, and S-1 (DOS) chemotherapy followed by surgery and adjuvant S-1 chemotherapy in potentially resectable gastric or gastroesophageal junction adenocarcinoma. Cancer Chemother Pharmacol 2013; 72:815-23. [PMID: 23921575 DOI: 10.1007/s00280-013-2257-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 07/29/2013] [Indexed: 12/29/2022]
Abstract
PURPOSE Adjuvant chemotherapy trial of TS-1 for gastric cancer study demonstrated that postoperative S-1 chemotherapy for 1 year improved overall survival of locally advanced gastric cancer (LAGC) patients. The goals of this study were to evaluate the feasibility and efficacy of neoadjuvant docetaxel, oxaliplatin, and S-1 (DOS) chemotherapy followed by surgery and adjuvant S-1 chemotherapy. METHODS In this single-center, open-label, phase II study, patients with potentially resectable adenocarcinoma of the stomach or gastroesophageal junction were eligible. For neoadjuvant chemotherapy, docetaxel 50 mg/m(2) on day (D) 1, oxaliplatin 100 mg/m(2) on D1, and S-1 40 mg/m(2) bid orally on D1-14 were administrated every 3 weeks for three cycles. After DOS chemotherapy, gastrectomy was performed, and then, adjuvant S-1 40 mg/m(2) bid was given on D1-28 every 6 weeks for 1 year. The primary endpoints were the proportion of patients who did not experience grade 3 or 4 toxicities (except grade 3 neutropenia) and R0 resection rates. RESULTS A total of 41 patients were enrolled. All patients completed three planned cycles of neoadjuvant chemotherapy without disease progression. Eighteen patients (43.9 %) did not experience any grade 3-4 toxicity (except grade 3 neutropenia) during the neoadjuvant chemotherapy. All patients underwent surgery, and R0 resection was achieved in 40 patients (97.6 %). CONCLUSION Neoadjuvant DOS chemotherapy could be performed safely with a high R0 resection rate in LAGC patients. A phase III trial is currently underway.
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Kim AD, Kang KA, Kim HS, Kim DH, Choi YH, Lee SJ, Kim HS, Hyun JW. A ginseng metabolite, compound K, induces autophagy and apoptosis via generation of reactive oxygen species and activation of JNK in human colon cancer cells. Cell Death Dis 2013; 4:e750. [PMID: 23907464 PMCID: PMC3763435 DOI: 10.1038/cddis.2013.273] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 05/26/2013] [Accepted: 06/19/2013] [Indexed: 02/05/2023]
Abstract
Compound K (20-O-(β-D-glucopyranosyl)-20(S)-protopanaxadiol) is an active metabolite of ginsenosides and induces apoptosis in various types of cancer cells. This study investigated the role of autophagy in compound K-induced cell death of human HCT-116 colon cancer cells. Compound K activated an autophagy pathway characterized by the accumulation of vesicles, the increased positive acridine orange-stained cells, the accumulation of LC3-II, and the elevation of autophagic flux. Whereas blockade of compound K-induced autophagy by 3-methyladenein and bafilomycin A1 significantly increased cell viability. In addition, compound K augmented the time-dependent expression of the autophagy-related proteins Atg5, Atg6, and Atg7. However, knockdown of Atg5, Atg6, and Atg7 markedly inhibited the detrimental impact of compound K on LC3-II accumulation and cell vitality. Compound K-provoked autophagy was also linked to the generation of intracellular reactive oxygen species (ROS); both of these processes were mitigated by the pre-treatment of cells with the antioxidant N-acetylcysteine. Moreover, compound K activated the c-Jun NH2-terminal kinase (JNK) signaling pathway, whereas downregulation of JNK by its specific inhibitor SP600125 or by small interfering RNA against JNK attenuated autophagy-mediated cell death in response to compound K. Compound K also provoked apoptosis, as evidenced by an increased number of apoptotic bodies and sub-G1 hypodiploid cells, enhanced activation of caspase-3 and caspase-9, and modulation of Bcl-2 and Bcl-2-associated X protein expression. Notably, compound K-stimulated autophagy as well as apoptosis was induced by disrupting the interaction between Atg6 and Bcl-2. Taken together, these results indicate that the induction of autophagy and apoptosis by compound K is mediated through ROS generation and JNK activation in human colon cancer cells.
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Choe PG, Shin HY, Shin MJ, Song KH, Kim ES, Jin HY, Choi YH, Choi OJ, Park KH, Park NJ, Kim KH, Han SH, Choo EJ, Kim HB. P003: Current status of infection control practice for prevent of central venous catheter-associated bloodstream infection in Korea. Antimicrob Resist Infect Control 2013. [PMCID: PMC3688028 DOI: 10.1186/2047-2994-2-s1-p3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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108
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Kho MC, Lee YJ, Ahn YM, Choi YH, Kim AY, Kang DG, Lee HS. Effects of Ethanol Extract of Gastrodia elata Blume on High‐Fructose induced Metabolic syndrome. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.1108.3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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109
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Jayasooriya RGPT, Jang YJ, Kang CH, Dilshara MG, Moon DO, Nam TJ, Choi YH, Kim GY. Inhibition of Nitric Oxide and Prostaglandin E<sub>2</sub> Expression by Methanol Extract of <i>Polyopes affinis</i> in Lipopolysaccharide-stimulated BV2 Microglial Cells through Suppression of Akt-dependent NF-kB Activity and MAPK Pathway. TROP J PHARM RES 2013. [DOI: 10.4314/tjpr.v12i1.11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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110
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Jayasooriya RGPT, Kang CH, Jang YJ, Kang SH, Dilshara MG, Choi YH, Moon DO, Kim GY. Methanol Extract of <i>Myelophycus caespitosus</i> Inhibits the Inflammatory Response in Lipopolysaccharidestimulated BV2 Microglial Cells by Downregulating NF-kB via Inhibition of the Akt Signaling Pathway. TROP J PHARM RES 2013. [DOI: 10.4314/tjpr.v11i6.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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111
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Roy R, Kukucka M, Brodarac A, Choi YH, Kurtz A, Hetzer R, Aberman Z, Stamm C. Placenta-derived mesenchymal stromal cells: In vitro and in vivo evaluation for cardiac cell therapy. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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112
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Brodarac A, Oberwallner B, Choi YH, Hescheler J, Saric T, Stamm C. Inhibition of hypoxia-induced apoptosis in induced pluripotent stem cell derived cardiomyocytes. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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113
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Deppe AC, Liakopoulos OJ, Hoffmann I, Blettner M, Kuhn E, Choi YH, Weigang E, Wahlers T. Acute aortic dissection type A: Epidemiology and consequences of time delay between onset of symptoms and surgery – a GERAADA analysis. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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114
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Stange S, Neef K, Langebartels G, Choi YH, Wahlers T. Cardiac toxicity of echinocandines. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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115
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Choi YH, Neef K, Drey F, Lepperhof V, Saric T, Liakopoulos OJ, Madershahian N, Wittwer T, Wahlers T. Co-transplantation of ips-derived cardiomyocytes and mesenchymal stem cells reduce infarct scar size in small animal model of myocardial infarction. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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116
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Deppe AC, Liakopoulos OJ, Kuhn E, Slottosch I, Stange S, Meller B, Choi YH, Wahlers T. Myocardial protection in mitral valve surgery: Comparison of crystalloid, warm and cold blood cardioplegia. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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117
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Roy R, Brodarac A, Stachelscheid H, Choi YH, Hetzer R, Stamm C. Cell signaling pathways involved in enhanced cardiac repair mediated by TGF-β treated amnion epithelial cells. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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118
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Neef K, Treskes P, Kumar S, Khalil M, Liakopoulos OJ, Madershahian N, Wittwer T, Wahlers T, Choi YH. ELEctrophysiological coupling OF skeletal myoblast based engineered tissue constructs IN VIVO. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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119
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Anic P, Oberwallner B, Brodarac A, Morawietz L, Hetzer R, Choi YH, Stamm C. Crosstalk between human cardiac extracellular matrix and cardiomyocyte-like cells. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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120
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Roy R, Haase T, Brodarac A, Hetzer R, Choi YH, Zohlnhöfer-Momm D, Stamm C. Transplantation of human amniotic membrane in a mouse model of myocardial infarction. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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121
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Bader A, Brodarac A, Choi YH, Kurtz A, Stamm C. Cardioprotection by cord blood mesenchymal stem cells through activation of Akt, ERK and STAT3 signaling. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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122
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Klose K, Roy R, Brodarac A, Choi YH, Nasseri BA, Bieback K, Kurtz A, Stamm C. Impact of cardiac surgery on heart failure serum factor mediated suppression of cord blood mesenchymal stem cells. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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123
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Jayasooriya RGPT, Nam TJ, Kim GY, Choi YH. Methanol Extract of Polyopes lancifolius Suppresses Tumor Necrosis Factor-α-Induced Matrix Metalloproteinase-9 Expression in T24 Bladder Carcinoma Cells. TROP J PHARM RES 2012. [DOI: 10.4314/tjpr.v11i3.9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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124
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Kim JI, Choi YH, Jahng Y. Synthesis and biological activity of 4,5-polymethylenepyrazole-derived HMG-COA reductase inhibitors. Arch Pharm Res 2012; 20:158-70. [PMID: 18975195 DOI: 10.1007/bf02974004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/1996] [Indexed: 11/26/2022]
Abstract
New HMG-CoA reductase inhibitors, in which 3-substituted 4,5-polymethylenepyrazoles are employed as a hydrophobic anchor connected to tetrahydro-4-hydroxy-2H-pyran-2-one by a two-carbon bridge, were designed and synthesized to exhibit significant inhibitory activity comparable to mevinolin. The most potent enzyme inhibitor (11cc, IC(50)=0.01 muM) is 4-fold more potent than lovastatin.
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125
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Kim KS, Choi YH, Lee IR, Kwon BM, Lee SH. A novel nortriterpene fromHedera rhombea. Arch Pharm Res 2012; 20:191-3. [PMID: 18975200 DOI: 10.1007/bf02974009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/1996] [Indexed: 10/21/2022]
Abstract
A new nortriterpene, rhombenone (1) was isolated from the leaves ofHedera rhombea Bean (Araliaceae). The structure of this compound was established as 27-demethyl-20(S)-dammar-23-ene-6alpha,20-diol-3,25-dione on the basis of spectral analysis including HMQC and HMBC techniques. Rhombenone (1) was the first 27-demethyl nortriterpene of dammarance type isolated from natural sources.
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