51
|
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]
|
52
|
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]
|
53
|
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]
|
54
|
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]
|
55
|
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]
|
56
|
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]
|
57
|
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]
|
58
|
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]
|
59
|
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]
|
60
|
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]
|
61
|
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]
|
62
|
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
|
63
|
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.
Collapse
|
64
|
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.
Collapse
|
65
|
Nuringtyas TR, Choi YH, Verpoorte R, Klinkhamer PGL, Leiss KA. Differential tissue distribution of metabolites in Jacobaea vulgaris, Jacobaea aquatica and their crosses. PHYTOCHEMISTRY 2012; 78:89-97. [PMID: 22516740 DOI: 10.1016/j.phytochem.2012.03.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 03/22/2012] [Accepted: 03/23/2012] [Indexed: 05/07/2023]
Abstract
Plants are attacked by many different herbivores. Some will consume whole leaves or roots, while others will attack specific types of tissue. Thus, insight into the metabolite profiles of different types of leaf tissues is necessary to understand plant resistance against herbivores. Jacobaea vulgaris, J. aquatica and three genotypes of their crossings were used to study the variation in metabolomic profiles between epidermis and mesophyll tissues. Extracts of epidermis and mesophyll tissues were obtained using carborundum abrasion (CA). Subsequently, (1)H nuclear magnetic resonance (NMR) spectroscopy and multivariate data analyses were applied to compare the metabolome profiles. Orthogonal partial least-squares-discriminant analysis (OPLS-DA) resulted in a clear separation of epidermis and mesophyll extracts. The epidermis contained significantly higher amounts of jacaranone and phenylpropanoids, specifically chlorogenic (5-O-CQA) and feruloyl quinic (FQA) acids compared to the mesophyll. In contrast, the mesophyll showed significantly higher concentrations of pyrrolizidine alkaloids (PAs), specifically jacobine and jaconine. The tissue specific distribution of these compounds was constant over all genotypes tested. Phenylpropanoids, 5-O-CQA and FQA, as well as PAs are known for their inhibitory effect on herbivores, especially against thrips. Thrips feeding commences with the penetration of the epidermis, followed by ingestion of sub-epidermal or mesophyll. Thrips thus may have to encounter phenylpropanoids in the epidermis as the first line of defence, before encountering the PAs as the ultimate defence in the mesophyll. The finding of tissue specific defense may have a major impact on studies of plant resistance. We cannot judge resistance using analyses of a whole roots, leafs or flowers. In such a whole-organism approach, the levels of potential defense compounds are far below the real ones encountered in tissues involved in the first line of defense. Instead, it is of great importance to study the defence compounds in the specific tissue to which the herbivore is confined.
Collapse
|
66
|
Choi YH, Lee MG. Pharmacokinetic and pharmacodynamic interaction between nifedipine and metformin in rats: competitive inhibition for metabolism of nifedipine and metformin by each other via CYP isozymes. Xenobiotica 2012; 42:483-95. [PMID: 22416982 DOI: 10.3109/00498254.2011.633177] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
It has been reported that hypertension exponentially increases in the patients with type 2 diabetes mellitus. Thus, this study was performed to investigate the pharmacokinetic and pharmacodynamic interactions between nifedipine and metformin, since both drugs were commonly metabolized via hepatic CYP2C and 3A subfamilies in rats. Nifedipine (3 mg/kg) and metformin (100 mg/kg) were simultaneously administered intravenously or orally to rats. Concentrations (I) of each drug in the liver and intestine, maximum velocity (V(max)), Michaelis-Menten constant (K(m)), and intrinsic clearance (CL(int)) for the disappearance of each drug, apparent inhibition constant (K(i)) and [I]/K(i) ratios of each drug in liver and intestine were determined. Also the metabolism of each drug in rat and human CYPs and blood pressure were also measured. After the simultaneous single intravenous administration of both drugs together, the AUCs of each drug were significantly greater than that in each drug alone due to the competitive inhibition for the metabolism of nifedipine by metformin via hepatic CYP3A1/2 and of metformin by nifedipine via hepatic CYP2C6 and 3A1/2. After the simultaneous single oral administration of both drugs, the significantly greater AUCs of each drug than that in each drug alone could have mainly been due to the competitive inhibition for the metabolism of nifedipine and metformin by each other via intestinal CYP3A1/2 in addition to competitive inhibition for the hepatic metabolism of each drug as same as the intravenous study.
Collapse
|
67
|
Jayasooriya RGTP, Kang CH, Park SY, Choi YH, Moon DO, Kim GY. Methanol Extract of Polyopes lancifolius Inhibits the Expression of Pro-inflammatory Mediators in LPSstimulated BV2 Microglia Cells via Downregulation of the NF-κB Pathway. TROP J PHARM RES 2012. [DOI: 10.4314/tjpr.v11i1.6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
68
|
Kuhn EW, Liakopoulos OJ, Brehmer L, Slottosch I, Deppe AC, Choi YH, Wippermann J, Wahlers T. Myocardial protection with warm versus cold blood cardioplegia in patients with prolonged aortic cross-clamp times during isolated cardiac surgery. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
69
|
Roy R, Kukucka M, Messroghli D, Brodarac A, Becher M, Choi YH, Tschöpe C, Stamm C. Placenta-derived mesenchymal stem cells for allogenic cardiac cell therapy. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
70
|
Kukucka M, Roy R, Messroghli D, Tschöpe C, Nasseri B, Choi YH, Stamm C. Assessing LV function in small animal models: Is MRI always superior to echocardiography? Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
71
|
Madershahian N, Scherner M, Liakopoulos O, Müller-Ehmsen J, Strauch J, Hoppe UC, Choi YH, Wahlers T. The effect of intraoperative tranexamic acid administration on postoperative blood loss after transapical aortic valve implantation. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
72
|
Deppe AC, Liakopoulos OJ, Kuhn EW, Slottosch I, Geissen J, Choi YH, Neef K, Wahlers T. In-vivo and in-vitro effects of short-term statin pretreatment on coronary relaxation and injury. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
73
|
Slottosch I, Liakopoulos O, Kuhn E, Deppe A, Schwarz D, Lopez A, Choi YH, Jung K, Mühlfeld C, Wahlers T. Controlled lung reperfusion for prevention of CPB-related pulmonary dysfunction. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
74
|
Sabashnikov A, Choi YH, Rahmanian PB, Zeriouh M, Mehler TO, Wahlers T, Wittwer T. Outcomes in patients undergoing surgery with a minimized extracorporeal circulation compared to off pump revascularization. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
75
|
Neef K, Drey F, Lenerz V, Saric T, Liakopoulos OJ, Stamm C, Wittwer T, Wahlers T, Choi YH. Co-Transplantation of iPS-derived cardiomyocytes and mesenchymal stem cells for the regeneration of infarcted myocardium. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|