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| 1 | Endogenous Ouabain in Hypertensive Disorder Complicating Pregnancy显示文摘Expression of endogenous ouabain in placenta and the concentrations of serum ET-1 and NO were examined in 30 patients with hypertensive disorder complicating pregnancy (HDCP) and 30 healthy pregnant women to investigate the effect of endogenous ouabain on HDCP. Compared with the healthy pregnant group, the expression of endogenous ouabain dramatically increased in the HDCP groups (P<0.01). There was a significantly positive correlation between the expression of en- dogenous ouabain with ET-1 (r= 0.5567, P<0.01), while the correlation of endogenous ouabain and NO was significantly negative (r=-0.6895, P<0.01). As expected, the correlation between ET-1 and NO was negative (r=-0.7796, P<0.01). ET-1 concentrations of maternal and cord sera in HDCP groups were significantly higher in comparison with healthy pregnant group (P<0.01). On the con- trast, NO concentrations were much lower in the maternal and cord sera of HDCP groups as com- pared with healthy pregnant group (P<0.01). Our data suggest that endogenous ouabain is directly involved in the nosogenesis of HDCP, with accompanying decreased NO and the elevated of ET-1. | 吴黎 熊承良 苏萍 | 2007 | Journal of Huazhong University of Science and Technology(Medical Sciences)2007，27，6： | 3 |
| 2 | Antiarrhythmic peptide AAP10 prevents ventricular arrhythmia in rabbit LQT2 model显示文摘Background and Objective Increased transmural dispersion ofrepolarization (TDR) has been shown to contribute to initiation and maintenance of ventricular arrhythmia in long QT syndromes (LQTS).Intercellular uncoupling through gap junctions is an important mechanism for maintaining TDR in both intact and diseased heart.The present study was to test the hypothesis that improving gap junction communication reduces TDR and prevents ventricular arrhythmia in rabbit LQT2 model.Methods An arterially perfused rabbit left ventricular preparation and E4031 (0.5μmol/L) were used to establish a model of LQT2.Preparations were randomly assigned to control (n=10),AAP-100nmol/L(n=10),AAP-500nM(n=10) groups.Transmural ECG as well as action potentials from both endocardium and epicardium was simultaneously recorded.Results In LQT2 model,presence of 500nmol/L AAP 10 reduced endocardial action potential and TDR and prevented ventricular arrhythmia comparing with the control and AAP 100nmol/ L groups (P<0.05).Conclusions The presence of 500 nmol/L AAP10 reduces TDR and prevents ventricular arrhythmia in rabbit ventricular model of LQT2.This study suggests a possible role of GJs in TDR in rabbit LQT2 model and indicates a new clinical approach to the management of LQTS. | Bodi Chen Xiaoqing Quan Cuntai Zhang Jiagao Lu Rong Bai Nian Liu Yanfei Ruan Jun Ke Jin Ma Liandong Li Lei Ruan Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology,Wuhan 430030, China | 2008 | Journal of Geriatric Cardiology2008，5，3： | 0 |
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