目的 了解带有死亡结构域的Fas相关蛋白（FADD）在维生素E琥珀酸酯（VES）诱导胃腺癌细胞凋亡过程中的作用。方法 以人胃腺癌SGC-7901细胞作为靶细胞,采用 Western Blot法、Lipofect转染法、DAPI染色法探讨FADD在VES诱导SGC-7901细胞凋...目的 了解带有死亡结构域的Fas相关蛋白（FADD）在维生素E琥珀酸酯（VES）诱导胃腺癌细胞凋亡过程中的作用。方法 以人胃腺癌SGC-7901细胞作为靶细胞,采用 Western Blot法、Lipofect转染法、DAPI染色法探讨FADD在VES诱导SGC-7901细胞凋亡过程中的作用。结果 经不同剂量VES处理后,SGC-7901细胞中FADD蛋白表达增加,呈剂量-效应关系;该细胞经FADD反义寡核苷酸转染与正义寡核苷酸转染相比,VES处理的细胞中FADD蛋白表达下降;用FADD反义寡核苷酸转染SGC-7901细胞后,降低了VES诱导的细胞凋亡率。结论FADD在VES诱导SGC-7901细胞凋亡过程中起着重要的作用。展开更多
Background: Invasive measurement of left ventricular filling pressure is the gold standard for determining diastolic dysfunction and predicting subsequent outcomes. For repetitive assessment of diastolic function duri...Background: Invasive measurement of left ventricular filling pressure is the gold standard for determining diastolic dysfunction and predicting subsequent outcomes. For repetitive assessment of diastolic function during long-term management, noninvasive surrogates are used. Their reliability and reproducibility should be validated separately for different cardiovascular diseases and conditions. The aim of this study was to identify noninvasive surrogates of invasively derived left ventricular filling pressure and to relate these surrogates to outcomes (death or valve replacement) in patients with stable, asymptomatic valvular heart disease and preserved ejection fraction. Materials and Methods: In a first cohort, we investigated 54 patients who had spiroergometry, echocardiography, and left heart catheterization within a range of 100 days. In a second cohort (n = 64), noninvasive measures were related to outcomes after follow-up of 694 ± 576 days. Transmitral doppler E/tissue doppler E’ (E/E’), E/flow propagation velocity (E/Vp), isovolumetric relaxation time/time to E’-time to E (IVRT/TE’-TE), ventilatory efficiency (VE/VCO2slope), O2 consumption at anaerobic threshold and at peak exercise (VO2AT, VO2peak) as well as NT-pro brain natriuretic peptide (NTpro-BNP) were assessed in relation to left ventricular filling pressure and outcome. Results: NT-proBNP, VO2AT, VE/VCO2slope as well as echocardiographic surrogates E/E’ and E/flow propagation velocity were indicators of elevated end diastolic filling pressure. In multivariable analysis, VO2AT was the only independent predictor. NT-proBNP was the only surrogate of left ventricular filling pressure which predicted outcome. Conclusion: In patients with asymptomatic valvular heart disease and preserved systolic function, spiroergometric parameters and NT-proBNP performed best to assess filling pressure. Only NT-proBNP showed prognostic value in this cohort.展开更多
文摘Background: Invasive measurement of left ventricular filling pressure is the gold standard for determining diastolic dysfunction and predicting subsequent outcomes. For repetitive assessment of diastolic function during long-term management, noninvasive surrogates are used. Their reliability and reproducibility should be validated separately for different cardiovascular diseases and conditions. The aim of this study was to identify noninvasive surrogates of invasively derived left ventricular filling pressure and to relate these surrogates to outcomes (death or valve replacement) in patients with stable, asymptomatic valvular heart disease and preserved ejection fraction. Materials and Methods: In a first cohort, we investigated 54 patients who had spiroergometry, echocardiography, and left heart catheterization within a range of 100 days. In a second cohort (n = 64), noninvasive measures were related to outcomes after follow-up of 694 ± 576 days. Transmitral doppler E/tissue doppler E’ (E/E’), E/flow propagation velocity (E/Vp), isovolumetric relaxation time/time to E’-time to E (IVRT/TE’-TE), ventilatory efficiency (VE/VCO2slope), O2 consumption at anaerobic threshold and at peak exercise (VO2AT, VO2peak) as well as NT-pro brain natriuretic peptide (NTpro-BNP) were assessed in relation to left ventricular filling pressure and outcome. Results: NT-proBNP, VO2AT, VE/VCO2slope as well as echocardiographic surrogates E/E’ and E/flow propagation velocity were indicators of elevated end diastolic filling pressure. In multivariable analysis, VO2AT was the only independent predictor. NT-proBNP was the only surrogate of left ventricular filling pressure which predicted outcome. Conclusion: In patients with asymptomatic valvular heart disease and preserved systolic function, spiroergometric parameters and NT-proBNP performed best to assess filling pressure. Only NT-proBNP showed prognostic value in this cohort.
