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Oxidative stress aneurysm

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https://www.readbyqxmd.com/read/27912196/nox-isoforms-in-the-development-of-abdominal-aortic-aneurysm
#1
Kin Lung Siu, Qiang Li, Yixuan Zhang, Jun Guo, Ji Youn Youn, Jie Du, Hua Cai
Oxidative stress plays an important role in the formation of abdominal aortic aneurysm (AAA), and we have recently established a causal role of uncoupled eNOS in this severe human disease. We have also shown that activation of NADPH oxidase (NOX) lies upstream of uncoupled eNOS. Therefore, identification of the specific NOX isoforms that are required for eNOS uncoupling and AAA formation would ultimately lead to novel therapies for AAA. In the present study, we used the Ang II infused hph-1 mice to examine the roles of NOX isoforms in the development of AAA...
November 19, 2016: Redox Biology
https://www.readbyqxmd.com/read/27908891/the-paraoxonase-gene-cluster-protects-against-abdominal-aortic-aneurysm-formation
#2
Yun-Fei Yan, Jian-Fei Pei, Ran Zhang, Fang Wang, Peng Gao, Zhu-Qin Zhang, Ting-Ting Wang, Yang Zhang, Zhi-Gang She, Hou-Zao Chen, De-Pei Liu
OBJECTIVE: Abdominal aortic aneurysm (AAA) is a life-threatening vascular pathology, the pathogenesis of which is closely related to oxidative stress. However, an effective pharmaceutical treatment is lacking because the exact cause of AAA remains unknown. Here, we aimed at delineating the role of the paraoxonases (PONs) gene cluster (PC), which prevents atherosclerosis through the detoxification of oxidized substrates, in AAA formation. APPROACH AND RESULTS: PC transgenic (Tg) mice were crossed to an Apoe(-/-) background, and an angiotensin II-induced AAA mouse model was used to analyze the effect of the PC on AAA formation...
December 1, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27904499/boric-acid-reduces-axonal-and-myelin-damage-in-experimental-sciatic-nerve-injury
#3
Zahir Kızılay, Haydar Ali Erken, Nesibe Kahraman Çetin, Serdar Aktaş, Burçin İrem Abas, Ali Yılmaz
The aim of this study was to investigate the effects of boric acid in experimental acute sciatic nerve injury. Twenty-eight adult male rats were randomly divided into four equal groups (n = 7): control (C), boric acid (BA), sciatic nerve injury (I), and sciatic nerve injury + boric acid treatment (BAI). Sciatic nerve injury was generated using a Yasargil aneurysm clip in the groups I and BAI. Boric acid was given four times at 100 mg/kg to rats in the groups BA and BAI after injury (by gavage at 0, 24, 48 and 72 hours) but no injury was made in the group BA...
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27855608/peroxisome-proliferator-activated-receptor-ppar-gamma-agonists-as-therapeutic-agents-for-cardiovascular-disorders-focus-on-atherosclerosis
#4
Ekaterina A Ivanova, Veronika A Myasoedova, Alexandra A Melnichenko, Alexander N Orekhov
Peroxisome proliferation-activated receptors (PPARs) are ligand-activated transcription factors that mainly regulate genes responsible for fatty acid (FA) and energy metabolism. There are three members of the PPAR family, PPAR-α, PPAR- β/δ and PPAR-γ. All three isoforms have therapeutic potential for treatment of cardiovascular disorders, and PPAR agonists are currently being actively studied in pre-clinical and clinical trials. PPAR γ agonists, main tissue expressing isoform, have potential to influence on inflammation processes, reduce oxidative stress, improve endothelial function and plays an important role in lipid metabolism...
November 18, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27815372/female-mice-with-an-xy-sex-chromosome-complement-develop-severe-angiotensin-ii-induced-abdominal-aortic-aneurysms
#5
Yasir Alsiraj, Sean E Thatcher, Richard Charnigo, Chen Kuey, Eric Blalock, Alan Daugherty, Lisa A Cassis
BACKGROUND: -Abdominal aortic aneurysms (AAAs) are a deadly pathology with strong sexual dimorphism. Similar to humans, female mice exhibit far lower incidences of angiotensin II (AngII)-induced AAAs than males. In addition to sex hormones, the X and Y sex chromosomes, and their unique complements of genes, may contribute to sexually dimorphic AAA pathology. Here, we defined the effect of female (XX) versus male (XY) sex chromosome complement on AngII-induced AAA formation and rupture in phenotypically female mice...
November 4, 2016: Circulation
https://www.readbyqxmd.com/read/27793556/unilateral-antegrade-cerebral-perfusion-and-moderate-hypothermia-assessing-safety-with-novel-biomarkers
#6
Bahadır Aytekin, Ertekin Utku Ünal, Aslı Demir, Uğur Aksu, Aytaç Çalışkan, Kübra Vardar, Fevzi Toraman, Ahmet Sarıtaş
BACKGROUND: Antegrade cerebral perfusion in aortic surgery is a well-established brain protection method. Open distal anastomosis during aortic surgery has some well-known advantages. Antegrade cerebral perfusion allows repair to some extent of the aortic arch, even in isolated ascending aortic aneurysm. The present study aims to investigate the adequacy of contralateral perfusion with novel oxidative stress parameters during unilateral antegrade cerebral perfusion. METHOD: The study included 30 consecutive patients undergoing thoracic aortic surgery with unilateral antegrade cerebral perfusion (uACP) under moderate hypothermia (28° C)...
September 13, 2016: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/27666779/exploring-spinal-cord-protection-by-remote-ischemic-preconditioning-an-experimental-study
#7
Johanna Herajärvi, Tuomas Anttila, Henna Sarja, Caius Mustonen, Henri Haapanen, Tuomas Mäkelä, Fredrik Yannopoulos, Tuomo Starck, Mika Kallio, Hannu Tuominen, Ulla Puistola, Peeter Karihtala, Kai Kiviluoma, Vesa Anttila, Tatu Juvonen
BACKGROUND: Paraplegia is one of the most severe complications occurring after the repair of thoracic and thoracoabdominal aortic aneurysms. Remote ischemic preconditioning (RIPC) has been shown to mitigate neurologic damage, and this study assessed its efficacy in preventing spinal cord ischemia. METHODS: The study randomized 16 female pigs into an RIPC group (n = 8) and a control group (n = 8). The RIPC group underwent four cycles of 5-minute ischemia-reperfusion episodes by intermittent occlusion of the left iliac artery...
September 22, 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27650341/organ-protection-during-aortic-cross-clamping
#8
REVIEW
Kak Khee Yeung, Menno Groeneveld, Joyce Ja-Ning Lu, Pepijn van Diemen, Vincent Jongkind, Willem Wisselink
Open surgical repair of an aortic aneurysm requires aortic cross-clamping, resulting in temporary ischemia of all organs and tissues supplied by the aorta distal to the clamp. Major complications of open aneurysm repair due to aortic cross-clamping include renal ischemia-reperfusion injury and postoperative colonic ischemia in case of supra- and infrarenal aortic aneurysm repair. Ischemia-reperfusion injury results in excessive production of reactive oxygen species and in oxidative stress, which can lead to multiple organ failure...
September 2016: Best Practice & Research. Clinical Anaesthesiology
https://www.readbyqxmd.com/read/27634835/intermedin1-53-attenuates-abdominal-aortic-aneurysm-by-inhibiting-oxidative-stress
#9
Wei-Wei Lu, Li-Xin Jia, Xian-Qiang Ni, Lei Zhao, Jin-Rui Chang, Jin-Sheng Zhang, Yue-Long Hou, Yi Zhu, You-Fei Guan, Yan-Rong Yu, Jie Du, Chao-Shu Tang, Yong-Fen Qi
OBJECTIVE: Oxidative stress plays a critical role in the development of abdominal aortic aneurysm (AAA). Intermedin (IMD) is a regulator of oxidative stress. Here, we investigated whether IMD reduces AAA by inhibiting oxidative stress. APPROACH AND RESULTS: In angiotensin II-induced ApoE(-)(/-) mouse and CaCl2-induced C57BL/6J mouse model of AAA, IMD1-53 significantly reduced the incidence of AAA and maximal aortic diameter. Ultrasonography, hematoxylin, and eosin staining and Verhoeff-van Gieson staining showed that IMD1-53 significantly decreased the enlarged aortas and elastic lamina degradation induced by angiotensin II or CaCl2...
November 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27626316/heme-oxygenase-1-deficiency-exacerbates-angiotensin-ii-induced-aortic-aneurysm-in-mice
#10
Yen-Chun Ho, Meng-Ling Wu, Pei-Yu Gung, Chung-Huang Chen, Cheng-Chin Kuo, Shaw-Fang Yet
Abdominal aortic aneurysm (AAA) is a chronic but often fatal disease in elderly population. Heme oxygenase-1 (HO-1) is a stress response protein with antioxidative and anti-inflammatory properties. HO-1 has been shown to protect against atherogenesis and arterial intimal thickening. Emerging evidences suggest that AAA and arterial occlusive disease have distinct pathogenic mechanisms. Thus, in this study we investigated the role of HO-1 in angiotensin II-induced AAA formation in HO-1+/+apoE-/- and HO-1-/-apoE-/- mice...
September 8, 2016: Oncotarget
https://www.readbyqxmd.com/read/27529213/the-potential-role-of-kallistatin-in-the-development-of-abdominal-aortic-aneurysm
#11
REVIEW
Jiaze Li, Smriti Murali Krishna, Jonathan Golledge
Abdominal aortic aneurysm (AAA) is a vascular condition that causes permanent dilation of the abdominal aorta, which can lead to death due to aortic rupture. The only treatment for AAA is surgical repair, and there is no current drug treatment for AAA. Aortic inflammation, vascular smooth muscle cell apoptosis, angiogenesis, oxidative stress and vascular remodeling are implicated in AAA pathogenesis. Kallistatin is a serine proteinase inhibitor, which has been shown to have a variety of functions, potentially relevant in AAA pathogenesis...
2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27301358/cytochrome-p450-1b1-contributes-to-the-development-of-angiotensin-ii-induced-aortic-aneurysm-in-male-apoe-mice
#12
Shyamala Thirunavukkarasu, Nayaab S Khan, Chi Young Song, Hafiz U Ghafoor, David D Brand, Frank J Gonzalez, Kafait U Malik
Cytochrome P450 (CYP) 1B1 is implicated in vascular smooth muscle cell migration, proliferation, and hypertension. We assessed the contribution of CYP1B1 to angiotensin (Ang) II-induced abdominal aortic aneurysm (AAA). Male Apoe(-/-)/Cyp1b1(+/+) and Apoe(-/-)/Cyp1b1(-/-) mice were infused with Ang II or its vehicle for 4 weeks; another group of Apoe(-/-)/Cyp1b1(+/+) mice was coadministered the CYP1B1 inhibitor 2,3',4,5'-tetramethoxystilbene (TMS) every third day for 4 weeks. On day 28 of Ang II infusion, AAAs were analyzed by ultrasound and ex vivo by Vernier calipers, mice were euthanized, and tissues were harvested...
August 2016: American Journal of Pathology
https://www.readbyqxmd.com/read/27274304/marfan-syndrome-current-perspectives
#13
REVIEW
Guglielmina Pepe, Betti Giusti, Elena Sticchi, Rosanna Abbate, Gian Franco Gensini, Stefano Nistri
Marfan syndrome (MFS) is a pleiotropic connective tissue disease inherited as an autosomal dominant trait, due to mutations in the FBN1 gene encoding fibrillin 1. It is an important protein of the extracellular matrix that contributes to the final structure of a microfibril. Few cases displaying an autosomal recessive transmission are reported in the world. The FBN1 gene, which is made of 66 exons, is located on chromosome 15q21.1. This review, after an introduction on the clinical manifestations that leads to the diagnosis of MFS, focuses on cardiovascular manifestations, pharmacological and surgical therapies of thoracic aortic aneurysm and/or dissection (TAAD), mechanisms underlying the progression of aneurysm or of acute dissection, and biomarkers associated with progression of TAADs...
2016: Application of Clinical Genetics
https://www.readbyqxmd.com/read/27255968/disturbed-flow-mediated-modulation-of-shear-forces-on-endothelial-plane-a-proposed-model-for-studying-endothelium-around-atherosclerotic-plaques
#14
Uma Maheswari Balaguru, Lakshmikirupa Sundaresan, Jeganathan Manivannan, Reji Majunathan, Krishnapriya Mani, Akila Swaminathan, Saravanakumar Venkatesan, Dharanibalan Kasiviswanathan, Suvro Chatterjee
Disturbed fluid flow or modulated shear stress is associated with vascular conditions such as atherosclerosis, thrombosis, and aneurysm. In vitro simulation of the fluid flow around the plaque micro-environment remains a challenging approach. Currently available models have limitations such as complications in protocols, high cost, incompetence of co-culture and not being suitable for massive expression studies. Hence, the present study aimed to develop a simple, versatile model based on Computational Fluid Dynamics (CFD) simulation...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27122311/redox-proteomic-analysis-of-serum-from-aortic-anerurysm-patients-insights-on-oxidation-of-specific-protein-target
#15
Cristiano Spadaccio, Raffaella Coccia, Marzia Perluigi, Gilda Pupo, Maria Eugenia Schininà, Alessandra Giorgi, Carla Blarzino, Francesco Nappi, Fraser W Sutherland, Massimo Chello, Fabio Di Domenico
OBJECTIVES: oxidative stress is undoubtedly one of the main players in abdominal aortic aneurysm (AAA) pathophysiology. Recent studies in AAA patients reported an increase in the indices of oxidative damage at the tissue level and in biological fluids coupled with the loss of counter-regulatory mechanisms of protection from oxidative stress. We recently reported, in a proteomic analysis of AAA patient sera, changes in the expression of several proteins exerting important modulatory activities on cellular proliferation, differentiation and response to damage...
June 21, 2016: Molecular BioSystems
https://www.readbyqxmd.com/read/27090732/akt2-promotes-bone-marrow-cell-mediated-aortic-protection-in-mice
#16
Sili Zou, Pingping Ren, Lin Zhang, Alon R Azares, Sui Zhang, Joseph S Coselli, Ying H Shen, Scott A LeMaire
BACKGROUND: Insufficient aortic protection and repair may contribute to the development of aortic aneurysms and dissections (AAD). However, mechanisms of aortic protection and repair are poorly understood. We have shown that the multifunctional kinase AKT2 plays an important role in protecting the aortic wall. Here, we examined whether AKT2 protects against AAD by promoting bone marrow cell (BMC)-mediated aortic protection. METHODS: Irradiated wild-type mice received green fluorescent protein-expressing BMCs from wild-type mice or Akt2(-/-) mice, followed by challenge with angiotensin II (1000 ng/kg/min) infusion for 4 weeks...
June 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27022887/the-preventive-effect-of-fish-oil-on-abdominal-aortic-aneurysm-development
#17
Hirona Kugo, Nobuhiro Zaima, Youhei Mouri, Hiroki Tanaka, Kenichi Yanagimoto, Tetsumei Urano, Naoki Unno, Tatsuya Moriyama
Abdominal aortic aneurysm (AAA) is a vascular disease involving gradual dilation of the abdominal aorta and high rupture-related mortality rates. AAA is histologically characterized by oxidative stress, chronic inflammation, and extracellular matrix degradation in the vascular wall. We previously demonstrated that aortic hypoperfusion could cause the vascular inflammation and AAA formation. However, the preventive method for hypoperfusion-induced AAA remains unknown. In this study, we evaluated the effect of fish oil on AAA development using a hypoperfusion-induced AAA animal model...
June 2016: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/27003944/evaluation-of-the-neutrophil-lymphocyte-ratio-in-newly-diagnosed-nondiabetic-hypertensive-patients-with-ascending-aortic-dilatation
#18
Özde Cem, Samet Yilmaz, Ahmet Korkmaz, Turna Fahrettin, Ilker Sahin, Vahit Demir
BACKGROUND: Ascending aortic dilatation (AAD), more often encountered in hypertensive individuals compared with normotensive individuals, is an important cause of mortality in adults. Neutrophil-to-lymphocyte ratio (NLR), as an oxidative stress and proinflammatory marker, has recently emerged as a useful indicator to predict cardiovascular risk and adverse outcomes. The aim of our study was to investigate the relationship between NLR and AAD in patients with hypertension. METHODS: A total of 135 newly diagnosed and untreated hypertensive patients were enrolled in this study...
August 2016: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/26993251/paraoxonase-1-overexpression-prevents-experimental-abdominal-aortic-aneurysm-progression
#19
Elena Burillo, Carlos Tarin, Monica-Maria Torres-Fonseca, Carlos-Ernesto Fernandez-García, Roxana Martinez-Pinna, Diego Martinez-Lopez, Patricia Llamas-Granda, Emilio Camafeita, Juan Antonio Lopez, Melina Vega de Ceniga, Michael Aviram, Jesus Egido, Luis-Miguel Blanco-Colio, Jose-Luis Martín-Ventura
Abdominal aortic aneurysm (AAA) is a permanent dilation of the aorta due to excessive proteolytic, oxidative and inflammatory injury of the aortic wall. We aimed to identify novel mediators involved in AAA pathophysiology, which could lead to novel therapeutic approaches. For that purpose, plasma from four AAA patients and four controls were analysed by a label-free proteomic approach. Among identified proteins, paraoxonase-1 (PON1) was decreased in plasma of AAA patients compared with controls, which was further validated in a bigger cohort of samples by ELISA...
June 1, 2016: Clinical Science (1979-)
https://www.readbyqxmd.com/read/26822129/matrix-metalloproteinase-12-modulates-high-fat-diet-induced-glomerular-fibrogenesis-and-inflammation-in-a-mouse-model-of-obesity
#20
Honglin Niu, Ying Li, Haibin Li, Yanqing Chi, Minghui Zhuang, Tao Zhang, Maodong Liu, Lei Nie
Obesity-induced kidney injury contributes to albuminuria, which is characterized by a progressive decline in renal function leading to glomerulosclerosis and renal fibrosis. Matrix metalloproteinases (MMPs) modulate inflammation and fibrosis by degrading a variety of extracellular matrix and regulating the activities of effector proteins. Abnormal regulation of MMP-12 expression has been implicated in abdominal aortic aneurysm, atherosclerosis, and emphysema, but the underlying mechanisms remain unclear. The present study examined the function of MMP-12 in glomerular fibrogenesis and inflammation using apo E(-/-) or apo E(-/-)MMP-12(-/-) mice and maintained on a high-fat-diet (HFD) for 3, 6, or 9 months...
2016: Scientific Reports
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