Oxidative stress in mononuclear cells plays a dominant role in their adhesion to mouse femoral artery after injury.
نویسندگان
چکیده
Leukocyte recruitment plays a pivotal role during inflammation after vascular injury. The importance of oxidative stress in vascular injury and its modulation by angiotensin II receptor blockers (olmesartan) have been demonstrated. We examined the contribution of leukocyte-associated oxidative stress in acute-phase leukocyte recruitment and its modulation by olmesartan. Male mice were treated with olmesartan (5 mg/kg per day) or vehicle for 7 days before the transluminal wire injury of the femoral artery. Intravital microscopy of the artery revealed that the mechanical injury increased adherent leukocytes at both 24 hours and 7 days after the injury, which was significantly reduced by olmesartan treatment. Dihydroethidium-associated fluorescence intensity observed in vehicle-treated mice was significantly diminished under olmesartan treatment. Apocynin, a nicotinamide-adenine dinucleotide phosphate oxidase inhibitor, showed a similar inhibitory effect on the leukocyte adhesion. Adoptive transfer of mononuclear cells, harvested from mice after wire injury, but not from those without wire injury, exhibited adhesion to the recipient injured artery. Furthermore, olmesartan treatment of mononuclear cells, but not of injured vasculature, reduced their recruitment to the injured artery. These data indicate that leukocyte recruitment to the mechanically injured artery is mediated by oxidative stress in leukocytes but not in vasculatures. Treatment with olmesartan blocked leukocyte recruitment by antagonizing mononuclear cells-associated oxidative stress.
منابع مشابه
Effects of Taurine, Sestrin 2 and Phyllanthin on coronary artery diseases
Heart failure is a growing epidemic in the worldwide. Atherosclerosis is a major mechanism of cardiovascular disease including myocardial infarction and peripheral arterial disease. Moreover, it causes many diseases and deaths around the world. Atherosclerosis, like coronary artery disease (CAD), is associated with inflammation and oxidative stress. The current article has been collected the s...
متن کاملSpironolactone Inhibits NADPH Oxidase-Mediated Oxidative Stress and Dysregulation of the Endothelial NO Synthase in Human Endothelial Cells
Accumulating evidence indicates that aldosterone plays a critical role in the mediation of oxidative stress and vascular damage. NADPH oxidase has been recognized as a major source of oxidative stress in vasculature. However, the relation between NADPH oxidase in aldosterone-mediated oxidative stress in endothelial cells remains to be ascertained. The present study aimed to investigate the rel...
متن کاملProtective Effect of Trehalose Against H2O2-induced Cytotoxicity and Oxidative Stress in PC-12 Cell Line and the Role of Heat Shock Protein-27
Background: Oxidative stress has been shown to be an important factor, which plays a significant role in the pathogenesis of neurodegenerative disorders. Heat Shock Protein-27 (HSP-27) has been implicated in antioxidant responses against oxidative stress. Trehalose is a natural disaccharide widely used in a variety of food products with demonstrated protective effects against several neurodegen...
متن کاملSpironolactone Inhibits NADPH Oxidase-Mediated Oxidative Stress and Dysregulation of the Endothelial NO Synthase in Human Endothelial Cells
Accumulating evidence indicates that aldosterone plays a critical role in the mediation of oxidative stress and vascular damage. NADPH oxidase has been recognized as a major source of oxidative stress in vasculature. However, the relation between NADPH oxidase in aldosterone-mediated oxidative stress in endothelial cells remains to be ascertained. The present study aimed to investigate the rel...
متن کاملEffect of serum starvation stress on the mouse spleen mononuclear cells mixed culture: Introducing a new immunomodulatory method
Introduction: Bone marrow and immune cell transplants are a common method of treating some blood diseases around the world. However, due to the malfunction of the immune system, its use is not always effective. In this study, we evaluated the potential of culture stress in serum-free medium in regulating the immune system. Materials and Methods: Spleen immune cells were isolated from Balb/C and...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Hypertension
دوره 51 3 شماره
صفحات -
تاریخ انتشار 2008