کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2959981 1178340 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Systemic Oxidative Stress and Endothelial Dysfunction is Associated With an Attenuated Acute Vascular Response to Inhaled Prostanoid in Pulmonary Artery Hypertension Patients
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی کاردیولوژی و پزشکی قلب و عروق
پیش نمایش صفحه اول مقاله
Systemic Oxidative Stress and Endothelial Dysfunction is Associated With an Attenuated Acute Vascular Response to Inhaled Prostanoid in Pulmonary Artery Hypertension Patients
چکیده انگلیسی

BackgroundSystemic endothelial dysfunction and increased oxidative stress have been observed in pulmonary arterial hypertension (PAH). We evaluate whether oxidative stress and endothelial dysfunction are associated with acute pulmonary vascular bed response to an inhaled prostanoid in PAH patients.MethodsFourteen idiopathic PAH patients and 14 controls were included. Oxidative stress was assessed through plasma malondialdehyde (MDA) levels and xanthine oxidase (XO) and endothelial-bound superoxide dismutase (eSOD) activity. Brachial artery endothelial-dependent flow-mediated vasodilation (FMD) was used to evaluate endothelial function. Hemodynamic response to inhaled iloprost was assessed with transthoracic echocardiography.ResultsPAH patients showed impaired FMD (2.8 ± 0.6 vs. 10.7 ± 0.6%, P < .01), increased MDA levels and XO activity (0.6 ± 0.2 vs. 0.3 ± 0.2 μM, P < .01 and 0.04 ± 0.01 vs. 0.03 ± 0.01 U/mL, P = .02, respectively) and decreased eSOD activity (235 ± 23 vs. 461 ± 33 AUC, P < .01). Iloprost improved right cardiac output (3.7 ± 0.6 to 4.1 ± 1.2 L/min, P = .02) and decreased pulmonary vascular resistance (4.1 ± 1.1 to 2.9 ± 0.9 Wood U, P = .01). Changes in right cardiac output after prostanoid inhalation correlated significantly with baseline eSOD activity and FMD (Rho: 0.61, P < .01 and Rho: 0.63, P = .01, respectively).ConclusionPAH patients show increased systemic oxidative stress and endothelial dysfunction markers. Response to inhaled prostanoid is inversely related to both parameters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cardiac Failure - Volume 17, Issue 12, December 2011, Pages 1012–1017
نویسندگان
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