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Oxidative stress aneurysm

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https://www.readbyqxmd.com/read/29408825/ligand-activated-peroxisome-proliferator-activated-receptor-%C3%AE-attenuates-vascular-oxidative-stress-by-inhibiting-thrombospondin-1-expression
#1
Min Young Ahn, Sun Ah Ham, Taesik Yoo, Won Jin Lee, Jung Seok Hwang, Kyung Shin Paek, Dae-Seog Lim, Sung Gu Han, Chi-Ho Lee, Han Geuk Seo
Thrombospondin-1 (TSP-1) is implicated in vascular diseases associated with oxidative stress, such as abdominal aortic aneurysms, ischemia-reperfusion injury, and atherosclerosis. However, the regulatory mechanisms underlying TSP-1 expression are not fully elucidated. In this study, we found that peroxisome proliferator-activated receptor δ (PPARδ) inhibited oxidative stress-induced TSP-1 expression and migration in vascular smooth muscle cells (VSMCs). Activation of PPARδ by GW501516, a specific ligand for PPARδ, significantly attenuated hydrogen peroxide (H2O2)-induced expression of TSP-1 in VSMCs...
February 6, 2018: Journal of Vascular Research
https://www.readbyqxmd.com/read/29388563/levo-tetrahydropalmatine-attenuates-progression-of-abdominal-aortic-aneurysm-in-an-elastase-perfusion-rat-model-via-suppression-of-matrix-metalloproteinase-and-monocyte-chemotactic-protein-1
#2
Xin Wang, Rong Zhao, Honggang Zhang, Min Zhou, Ming Zhang, Tong Qiao
BACKGROUND Levo-tetrahydropalmatine (L-THP) is a tetrahydro protoberberine isoquinoline alkaloid obtained from the genera Stephania and Corydalis. In the present research, we evaluated the effects of L-THP on the progression of aortic aneurysms (AAs) in experimental rats induced with perfusion of elastase. MATERIAL AND METHODS Thirty-six Sprague-Dawley rats were divided into sham-operated, control, and L-THP treated groups (n=12 in each group). The rats in the control group and the L-THP group received intra-aortic perfusion of elastase to induce AAs; the sham-operated group received perfusion of saline...
February 1, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29365517/intermedin1-53-attenuates-abdominal-aortic-aneurysm-by-inhibiting-oxidative-stress
#3
Yong Fen Qi, 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
No abstract text is available yet for this article.
August 2017: Atherosclerosis
https://www.readbyqxmd.com/read/29348119/cigarette-smoke-initiates-oxidative-stress-induced-cellular-phenotypic-modulation-leading-to-cerebral-aneurysm-pathogenesis
#4
Robert M Starke, John W Thompson, Muhammad S Ali, Crissey L Pascale, Alejandra Martinez Lege, Dale Ding, Nohra Chalouhi, David M Hasan, Pascal Jabbour, Gary K Owens, Michal Toborek, Joshua M Hare, Aaron S Dumont
OBJECTIVE: Cigarette smoke exposure (CSE) is a risk factor for cerebral aneurysm (CA) formation, but the molecular mechanisms are unclear. Although CSE is known to contribute to excess reactive oxygen species generation, the role of oxidative stress on vascular smooth muscle cell (VSMC) phenotypic modulation and pathogenesis of CAs is unknown. The goal of this study was to investigate whether CSE activates a NOX (NAPDH oxidase)-dependent pathway leading to VSMC phenotypic modulation and CA formation and rupture...
January 18, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29297132/assessment-of-biomarkers-in-the-neotropical-fish-brycon-amazonicus-exposed-to-cypermethrin-based-insecticide
#5
Fernanda Dias de Moraes, Francine Perri Venturini, Priscila Adriana Rossi, Ive Marchioni Avilez, Naiara Elisabete da Silva de Souza, Gilberto Moraes
The effects of cypermethrin-based insecticide (CBI), commonly used in aquaculture and agriculture, were evaluated in matrinxa (Brycon amazonicus) exposed to sub-lethal concentration (20% of LC50) for 96 h. Physiological and biochemical effects were studied through biomarkers: lipid peroxidation (LPO), glutathione (GSH), and ascorbic acid concentrations; superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), and glucose-6-phosphate dehydrogenase (G6PDH) assays in the liver and gills. Besides, ions Na+, Cl-, and K+; protein and glucose concentrations were measured in the plasma...
January 2, 2018: Ecotoxicology
https://www.readbyqxmd.com/read/29212462/pharmacological-targeting-of-secondary-brain-damage-following-ischemic-or-hemorrhagic-stroke-traumatic-brain-injury-and-bacterial-meningitis-a-systematic-review-and-meta-analysis
#6
Thomas Beez, Hans-Jakob Steiger, Nima Etminan
BACKGROUND: The effectiveness of pharmacological strategies exclusively targeting secondary brain damage (SBD) following ischemic stroke, aneurysmal subarachnoid hemorrhage, aSAH, intracerebral hemorrhage (ICH), traumatic brain injury (TBI) and bacterial meningitis is unclear. This meta-analysis studied the effect of SBD targeted treatment on clinical outcome across the pathological entities. METHODS: Randomized, controlled, double-blinded trials on aforementioned entities with 'death' as endpoint were identified...
December 7, 2017: BMC Neurology
https://www.readbyqxmd.com/read/29157018/progressive-dna-and-rna-damage-from-oxidation-after-aneurysmal-subarachnoid-hemorrhage-in-humans
#7
A Jorgensen, J M Staalsoe, A H Simonsen, S G Hasselbalch, P Høgh, A Weimann, Poulsen He, N V Olsen
Free radical toxicity is considered a key mechanism in the neuronal damage occurring after aneurysmal subarachnoid hemorrhage (SAH). We measured markers of DNA and RNA damage from oxidation in cerebrospinal fluid from 45 patients with SAH on day 1-14 after ictus and 45 age-matched healthy control subjects. At baseline, both markers were significantly increased in patients compared to controls (p-values < 0.001), and exhibited a progressive further increase (to > 20-fold above control levels) from day 5-14...
November 20, 2017: Free Radical Research
https://www.readbyqxmd.com/read/29141531/statins-in-aortic-disease
#8
Vicky Tsigkou, Gerasimos Siasos, Eva Mpletsa, Maria-Paraskevi Panoilia, Aggeliki Papastavrou, Giorgos Kokosias, Evangelos Oikonomou, Marina Zaromitidou, Manolis Vavuranakis, Christodoulos Stefanadis, Dimitris Tousoulis
BACKGROUND: Numerous studies indicate that statins have also multiple beneficial actions (known as 'pleiotropic actions') on cardiovascular system through the improvement of endothelial dysfunction, inflammation, oxidative stress, increased arterial thrombosis, and the stabilization of the atherosclerotic plaque. Aortic disease primarily consists of aortic valve stenosis, aortic valve regurgitation, aneurysm disease, and genetic disorders such as Marfan syndrome, bicuspid aortic valve and aortic coarctation...
November 14, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29133197/inhibition-of-leukotriene-b4-synthesis-protects-against-early-brain-injury-possibly-via-reducing-the-neutrophil-generated-inflammatory-response-and-oxidative-stress-after-subarachnoid-hemorrhage-in-rats
#9
Zhen-Nan Ye, Ling-Yun Wu, Jing-Peng Liu, Qiang Chen, Xiang-Sheng Zhang, Yue Lu, Meng-Liang Zhou, Wei Li, Zi-Huan Zhang, Da-Yong Xia, Zong Zhuang, Chun-Hua Hang
Leukotriene B4 (LTB4) is a highly potent neutrophil chemoattractant and neutrophils induces inflammatory response and oxidative stress when they recruit to and infiltrate in the injuried/inflamed site, such as the brain parenchyma after aneurysmal subarachnoid hemorrhage (SAH). This study is to investigate the potential effects of inhibition of LTB4 synthesis on neutrophil recruitment, inflammatory response and oxidative stress, as well as early brain injury (EBI) in rats after SAH. A pre-chiasmatic cistern SAH model of rats was used in this experiment...
November 11, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28993547/development-of-novel-therapies-for-cardiovascular-diseases-by-clinical-application-of-basic-research
#10
Kimio Satoh
Cyclophilin A (CyPA) is secreted from vascular smooth muscle cells, inflammatory cells, activated platelets, and cardiac fibroblasts in response to oxidative stress. Excessive and continuous activation of the RhoA/Rho-kinase system promotes the secretion of CyPA, resulting in the development of multiple cardiovascular diseases. Basigin (Bsg), a transmembrane glycoprotein that activates matrix metalloproteinases, is an extracellular receptor for CyPA that promotes cell proliferation and inflammation. Thus, the CyPA/Bsg system is potentially a novel therapeutic target for cardiovascular diseases...
October 6, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28971841/role-of-myeloperoxidase-in-abdominal-aortic-aneurysm-formation-mitigation-by-taurine
#11
Ha Won Kim, Andra L Blomkalns, Mourad Ogbi, Manesh Thomas, Daniel Gavrila, Bonnie S Neltner, Lisa A Cassis, Robert W Thompson, Robert M Weiss, Paul D Lindower, Victor M Blanco, Michael L McCormick, Alan Daugherty, Xiaoming Fu, Stanley L Hazen, Brian K Stansfield, Yuqing Huo, David J Fulton, Tapan Chatterjee, Neal L Weintraub
Oxidative stress plays a fundamental role in abdominal aortic aneurysm (AAA) formation. Activated polymorphonuclear leukocytes (or neutrophils) are associated with AAA and express myeloperoxidase (MPO), which promotes inflammation, matrix degradation, and other pathological features of AAA, including enhanced oxidative stress through generation of reactive oxygen species. Both plasma and aortic MPO levels are elevated in patients with AAA, but the role of MPO in AAA pathogenesis has, heretofore, never been investigated...
December 1, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28953105/potential-medication-treatment-according-to-pathological-mechanisms-in-abdominal-aortic-aneurysm
#12
Shi-Lan Zhang, Xiao Du, Yan-Qiao Chen, Yuan-Sheng Tan, Ling Liu
Abdominal aortic aneurysm (AAA) is a vascular disease with high mortality. Due to lack of effective medications to stop or reverse the progression of AAA, surgical operation has become the most predominant recommendation of treatment for patients. There are many potential mechanisms, including inflammation, smooth muscle cell apoptosis, extracellular matrix degradation, oxidative stress and so on, involving in AAA pathogenesis. According to those mechanisms, some potential therapeutic drugs have been proposed and tested in animal models and even in clinical trials...
September 25, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28951984/remote-ischemic-preconditioning-protects-human-neural-stem-cells-from-oxidative-stress
#13
Ayako Motomura, Mikiko Shimizu, Akira Kato, Kazuya Motomura, Akane Yamamichi, Hiroko Koyama, Fumiharu Ohka, Tomohide Nishikawa, Yusuke Nishimura, Masahito Hara, Tetsuya Fukuda, Yasuhiko Bando, Toshihide Nishimura, Toshihiko Wakabayashi, Atsushi Natsume
In previous clinical trials, we showed that remote ischemic preconditioning (rIPC) reduced myocardial damage in children undergoing treatment for congenital heart defects and postoperative renal failure in patients undergoing abdominal aortic aneurysm surgery. In rabbit experiments, pre-treatment with plasma and plasma dialysate (obtained using 15-kDa cut-off dialysis membrane) from donor rabbits subjected to rIPC similarly protected against cardiac infarction. However, the protective substances containing in rIPC plasma have been unknown...
November 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28947615/vascular-adam17-a-disintegrin-and-metalloproteinase-domain-17-is-required-for-angiotensin-ii-%C3%AE-aminopropionitrile-induced-abdominal-aortic-aneurysm
#14
Tatsuo Kawai, Takehiko Takayanagi, Steven J Forrester, Kyle J Preston, Takashi Obama, Toshiyuki Tsuji, Tomonori Kobayashi, Michael J Boyer, Hannah A Cooper, Hang Fai Kwok, Tomoki Hashimoto, Rosario Scalia, Victor Rizzo, Satoru Eguchi
Angiotensin II (AngII)-activated epidermal growth factor receptor has been implicated in abdominal aortic aneurysm (AAA) development. In vascular smooth muscle cells (VSMCs), AngII activates epidermal growth factor receptor via a metalloproteinase, ADAM17 (a disintegrin and metalloproteinase domain 17). We hypothesized that AngII-dependent AAA development would be prevented in mice lacking ADAM17 in VSMCs. To test this concept, control and VSMC ADAM17-deficient mice were cotreated with AngII and a lysyl oxidase inhibitor, β-aminopropionitrile, to induce AAA...
November 2017: Hypertension
https://www.readbyqxmd.com/read/28925872/abdominal-aorta-aneurysm-aaa-is-there-a-role-for-prevention-and-therapy-using-antioxidants
#15
Joël Pincemail, Jean-Olivier Defraigne, Audrey Courtois, Adelin Albert, Jean-Paul Cheramy-Bien, Natzi Sakalihasan
Abdominal aortic aneurysm (AAA) is a degenerative disease that cause mortality in people aged > 65 years. Increased reactive oxygen species (ROS) and oxidative stress seems to play a pivotal role in AAA pathogenesis. Several sources of ROS have been identified in aortic tissues using experimental models: inflammation, increased activity of NAD(P)H or NOX, over-expression of inducible nitric oxide synthase (iNOS), uncoupled endothelial nitric oxide synthase (eNOS), platelets activation and iron release from hemoglobin...
September 18, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28884122/advanced-oxidation-protein-products-and-carbonylated-proteins-as-biomarkers-of-oxidative-stress-in-selected-atherosclerosis-mediated-diseases
#16
Bogna Gryszczyńska, Dorota Formanowicz, Magdalena Budzyń, Maria Wanic-Kossowska, Elżbieta Pawliczak, Piotr Formanowicz, Wacław Majewski, Krzysztof Wojciech Strzyżewski, Magdalena P Kasprzak, Maria Iskra
OBJECTIVES: The main question of this study was to evaluate the intensity of oxidative protein modification shown as advanced oxidation protein products (AOPP) and carbonylated proteins, expressed as protein carbonyl content (C=O) in abdominal aortic aneurysms (AAA), aortoiliac occlusive disease (AIOD), and chronic kidney disease (CKD). DESIGN AND METHODS: The study was carried out in a group of 35 AAA patients and 13 AIOD patients. However, CKD patients were divided into two groups: predialysis (PRE) included 50 patients or hemodialysis (HD) consisted of 34 patients...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28836260/hyperhomocysteinaemia-and-vascular-injury-advances-in-mechanisms-and-drug-targets
#17
REVIEW
Yi Fu, Xian Wang, Wei Kong
Homocysteine is a sulphur-containing non-proteinogenic amino acid. Hyperhomocysteinaemia (HHcy), the pathogenic elevation of plasma homocysteine as a result of an imbalance of its metabolism, is an independent risk factor for various vascular diseases, such as atherosclerosis, hypertension, vascular calcification and aneurysm. Treatments aimed at lowering plasma homocysteine via dietary supplementation with folic acids and vitamin B are more effective in preventing vascular disease where the population has a normally low folate consumption than in areas with higher dietary folate...
August 24, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28808955/exploring-the-biological-and-mechanical-properties-of-abdominal-aortic-aneurysms-using-uspio-mri-and-peak-tissue-stress-a-combined-clinical-and-finite-element-study
#18
Noel Conlisk, Rachael O Forsythe, Lyam Hollis, Barry J Doyle, Olivia M B McBride, Jennifer M J Robson, Chengjia Wang, Calum D Gray, Scott I K Semple, Tom MacGillivray, Edwin J R van Beek, David E Newby, Peter R Hoskins
Inflammation detected through the uptake of ultrasmall superparamagnetic particles of iron oxide (USPIO) on magnetic resonance imaging (MRI) and finite element (FE) modelling of tissue stress both hold potential in the assessment of abdominal aortic aneurysm (AAA) rupture risk. This study aimed to examine the spatial relationship between these two biomarkers. Patients (n = 50) > 40 years with AAA maximum diameters > = 40 mm underwent USPIO-enhanced MRI and computed tomography angiogram (CTA). USPIO uptake was compared with wall stress predictions from CTA-based patient-specific FE models of each aneurysm...
August 14, 2017: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/28735510/fxa-inhibition-by-rivaroxaban-modifies-mechanisms-associated-with-the-pathogenesis-of-human-abdominal-aortic-aneurysms
#19
Guillermo Moñux, Jose J Zamorano-León, Pablo Marqués, Bernardo Sopeña, J M García-García, G Laich de Koller, Bibiana Calvo-Rico, Miguel A García-Fernandez, J Serrano, Antonio López-Farré
AIMS: To evaluate if rivaroxaban, an oral factor Xa (FXa) inhibitor, could modify the expression in vitro of inflammatory and oxidative stress biomarkers in abdominal aortic aneurysmal (AAA) sites showing intraluminal thrombus. METHODS: AAA sites with intraluminal mural thrombus were obtained from six patients undergoing elective AAA repair. In addition, control abdominal aortic samples were obtained from six organ donors. AAA sites were incubated in the presence and absence of 50 nmol l(-1) rivaroxaban...
July 23, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28725903/suppressive-effects-of-dietary-epa-rich-fish-oil-on-the-degradation-of-elastin-fibers-in-the-aortic-wall-in-nicotine-administered-mice
#20
Hirona Kugo, Nobuhiro Zaima, Megumi Onozato, Chie Miyamoto, Keisuke Hashimoto, Kenichi Yanagimoto, Tatsuya Moriyama
Abdominal aortic aneurysm (AAA) is a vascular disease involving gradual dilation of the abdominal aorta. Recent studies suggest that nicotine, which is a primary component in cigarette smoke, is closely associated with the development and rupture of an AAA. Nicotine accelerates AAA development through the weakening of the vascular wall by increasing oxidative stress and matrix metalloproteinase (MMP)-2 expression. However, little is known about preventing the AAA induced by nicotine. A non-surgical means of preventing the weakening of the vascular wall before the onset of AAA by functional food factors would be a valuable option over surgery...
August 1, 2017: Food & Function
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