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Free radicals, vascular damage

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https://www.readbyqxmd.com/read/28300670/ergothioneine-products-derived-by-superoxide-oxidation-in-endothelial-cells-exposed-to-high-glucose
#1
Luigi Servillo, Nunzia D'Onofrio, Rosario Casale, Domenico Cautela, Alfonso Giovane, Domenico Castaldo, Maria Luisa Balestrieri
Ergothioneine (Egt), 2-mercapto-L-histidine betaine (ESH), is a dietary component acting as antioxidant and cytoprotectant. In vitro studies demonstrated that Egt, a powerful scavenger of hydroxyl radicals, superoxide anion, hypochlorous acid and peroxynitrite, protects vascular function against oxidative damages, thus preventing endothelial dysfunction. In order to delve the peculiar oxidative behavior of Egt, firstly identified in cell free-systems, experiments were designed to identify the Egt oxidation products when endothelial cells (EC) benefit of its protection against high-glucose (hGluc)...
March 12, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28265034/extracellular-matrix-inflammation-in-vascular-cognitive-impairment-and-dementia
#2
REVIEW
Gary A Rosenberg
Vascular cognitive impairment and dementia (VCID) include a wide spectrum of chronic manifestations of vascular disease related to large vessel strokes and small vessel disease (SVD). Lacunar strokes and white matter (WM) injury are consequences of SVD. The main vascular risk factor for SVD is brain hypoperfusion from cerebral blood vessel narrowing due to chronic hypertension. The hypoperfusion leads to activation and degeneration of astrocytes with the resulting fibrosis of the extracellular matrix (ECM)...
March 1, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28168552/obesity-cardiovascular-disease-and-role-of-vitamin-c-on-inflammation-a-review-of-facts-and-underlying-mechanisms
#3
REVIEW
Mohammed S Ellulu
Obesity means the accumulation of excessive fat that may interfere with the maintenance of optimal state of health. Obesity causes cardiac and vascular disease through well-known mediators such as hypertension, type-2 diabetes mellitus, and dyslipidemia, but there are evidences for other mediators such as chronic inflammation, oxidative stress, and thrombosis. The decreased levels of antioxidants factors and nitric oxide predispose to further cardiovascular adverse events. To reduce the risks, antioxidants can help by neutralizing the free radicals and protecting from damage by donating electrons...
February 6, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28078482/irreversible-electroporation-as-treatment-of-locally-advanced-and-as-margin-accentuation-in-borderline-resectable-pancreatic-adenocarcinoma
#4
P Marsanic, A Mellano, A Sottile, M De Simone
In recent years, many local ablation technologies based on thermal damage have been used in the treatment of locally advanced pancreatic carcinoma (LAPC) and borderline resectable pancreatic carcinoma (BLRPC). However, they are associated with major complications because of possible vascular and ductal damage. Irreversible electroporation (IRE) is a nonthermal ablation technology that seems safe near vital vascular and ductal structures. IRE could be used as exclusive treatment of LAPC (en situ to IRE) after induction chemotherapy In BLRPC, surgery is not really radical in 6% of patients (microscopic residual) and local recurrences occur in 11-42% of apparent radical resections...
January 11, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28042309/the-link-between-vascular-dysfunction-bladder-ischemia-and-aging-bladder-dysfunction
#5
REVIEW
Karl-Erik Andersson, Donna B Boedtkjer, Axel Forman
The vascular supply to the human bladder is derived mainly from the superior and inferior vesical arteries, the latter being directly connected to the internal iliac artery. Aging is associated with an impairment of blood vessel function and changes may occur in the vasculature at the molecular, cellular and functional level. Pelvic arterial insufficiency may play an important role in the development of bladder dysfunctions such as detrusor overactivity (DO) and the overactive bladder syndrome. Chronic ischemia-related bladder dysfunction may progress to bladder underactivity and it would be desirable to treat not only lower urinary tract symptoms (LUTS) induced by chronic ischemia, but also the progression of the morphological bladder changes...
January 2017: Therapeutic Advances in Urology
https://www.readbyqxmd.com/read/27986660/dendritic-cells-and-isolevuglandins-in-immunity-inflammation-and-hypertension
#6
Kala Brooke Dixon, Sean S Davies, Annet Kirabo
Hypertension is the major risk factor for morbidity and mortality from myocardial infarction, stroke, heart failure, and chronic kidney disease. Despite its importance, the pathogenesis of essential hypertension is poorly understood. During the past several years, it has become evident that T cells contribute to hypertension. Activated T cells accumulate in the perivascular space and the kidney and release cytokines which promote vascular dysfunction and end organ damage. Although dendritic cells play a pivotal role in initiating adaptive immune responses, T cells have taken center stage in studies implicating the immune system in the genesis of hypertension...
December 16, 2016: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/27983965/cyanidin-3-glucoside-attenuates-angiotensin-ii-induced-oxidative-stress-and-inflammation-in-vascular-endothelial-cells
#7
Sivanan Sivasinprasasn, Rungusa Pantan, Sarinthorn Thummayot, Jiraporn Tocharus, Apichart Suksamrarn, Chainarong Tocharus
Angiotensin II (Ang II) causes oxidative stress and vascular inflammation, leading to vascular endothelial cell dysfunction, and is associated with the development of inflammatory cardiovascular diseases such as atherosclerosis. Therefore, interventions of oxidative stress and inflammation may contribute to the reduction of cardiovascular diseases. Cyanidin-3-glucoside (C3G) plays a role in the prevention of oxidative damage in several diseases. Here, we investigated the effect of C3G on Ang II-induced oxidative stress and vascular inflammation in human endothelial cells (EA...
October 28, 2016: Chemico-biological Interactions
https://www.readbyqxmd.com/read/27864280/edaravone-injection-reverses-learning-and-memory-deficits-in-a-rat-model-of-vascular-dementia
#8
Xu Li, Fen Lu, Wei Li, Lingzhi Qin, Yong Yao, Xuerong Ge, Qingkai Yu, Xinliang Liang, Dongmei Zhao, Xiaohong Li, Jiewen Zhang
Edaravone is a novel free radical scavenger that exerts neuroprotective effects by inhibiting endothelial injury and by ameliorating neuronal damage in brain ischemia. Recently, it was reported that edaravone could alleviate the pathology and cognitive deficits of Alzheimer's disease patients. However, its relevance to vascular dementia (VaD) is not clear. In this study, we partially occluded the bilateral carotid arteries of rats surgically to induce chronic cerebral hypoperfusion (CCH), a well-known rat model of VaD...
January 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/27775600/modulation-of-the-anti-tumor-efficacy-of-photodynamic-therapy-by-nitric-oxide
#9
REVIEW
Albert W Girotti
Nitric oxide (NO) produced by nitric oxide synthase (NOS) enzymes is a free radical molecule involved in a wide variety of normophysiologic and pathophysiologic processes. Included in the latter category are cancer promotion, progression, and resistance to therapeutic intervention. Animal tumor photodynamic therapy (PDT) studies several years ago revealed that endogenous NO can reduce PDT efficacy and that NOS inhibitors can alleviate this. Until relatively recently, little else was known about this anti-PDT effect of NO, including: (a) the underlying mechanisms; (b) type(s) of NOS involved; and (c) whether active NO was generated in vascular cells, tumor cells, or both...
October 20, 2016: Cancers
https://www.readbyqxmd.com/read/27754291/br-08-3-management-of-dyslipidemia-in-hypertension
#10
V V Muthusamy
Cardiovascular disease burden is increasing all over the world. The diagnosis of hypertension is considered when a person has persistently elevated BP (Systolic BP more than 140 mmHg and/or Diastolic BP more than 90 mmHg). Dyslipidemia denotes abnormal levels of lipids in the blood (Total Cholesterol >200 mg%, Low density lipoprotein (LDL) >100 mg%, Triglycerides (TGL) >150 mg% and High density lipoprotein (HDL) <40 mg in men and < 50 mg in women. Hypertension and Dyslipidemia constitute the important components of metabolic syndrome as per the definition of NCEP Guidelines-Adult Treatment Panel III (ATP III)...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27696825/controlled-delivery-of-extracellular-ros-based-on-hematoporphyrin-incorporated-polyurethane-film-for-enhanced-proliferation-of-endothelial-cells
#11
Min-Ah Koo, Bong-Jin Kim, Mi Hee Lee, Byeong-Ju Kwon, Min Sung Kim, Gyeung Mi Seon, Dohyun Kim, Ki Chang Nam, Kangkyun Wang, Yong-Rok Kim, Jong-Chul Park
The principle of photodynamic treatment (PDT) involves the administration of photosensitizer (PS) at diseased tissues, followed by light irradiation to produce reactive oxygen species (ROS). In cells, a moderate increase in ROS plays an important role as signaling molecule to promote cell proliferation, whereas a severe increase of ROS causes cell damage. Previous studies have shown that low levels of ROS stimulate cell growth through PS drugs-treating PDT and non-thermal plasma treatment. However, these methods have side effects which are associated with low tissue selectivity and remaining of PS residues...
October 4, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27680784/a3-oxidative-stress-in-maternal-serum-as-endothelial-dysfunction-marker-in-preeclampsia-an-electron-paramagnetic-resonance-epr-pilot-study
#12
D Mannaerts, E Faes, J Gielis, J Briedé, P Cos, E Van Craenenbroeck, W Gyselaers, J Cornette, M Spaanderman, Y Jacquemyn
AIMS: Oxidative stress is crucial in the pathophysiology of preeclampsia. Reactive oxygen species (ROS) like the superoxide radical O2-, are produced by the ischemic placenta, causing systemic inflammation and endothelial dysfunction. EPR uses microwave radiation and a high magnetic field and is the most direct and reliable method to detect free radicals. We explored the feasibility of determining O2- concentration in maternal serum and compared pre-eclamptic and uncomplicated pregnancies...
August 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/27677837/role-of-oxidative-stress-in-the-genesis-of-atherosclerosis-and-diabetes-mellitus-a-personal-look-back-on-50-years-of-research
#13
Vadim Z Lankin, Alla K Tikhaze
We have provided an overview, based on the literature and our data. In accordance with the theory of D. Harman free radical processes cause damages that can accumulate and contribute to aging of the organism. Atherosclerosis and diabetes are developing for a long time so they are manifested predominantly in old age. We found an increase in the level of free radical peroxidation products and decrease in the activity of antioxidant enzymes in the tissues of animals with experimental atherosclerosis. Similar changes were found in the blood of patients with atherosclerosis and aortic autopsy material with atherosclerotic lesions...
2017: Current Aging Science
https://www.readbyqxmd.com/read/27666185/the-effects-of-resveratrol-on-aging-vessels
#14
Miguel Diaz, Hans Degens, Luc Vanhees, Clare Austin, May Azzawi
Aging is a major risk factor for the development of cardiovascular disease. Despite a significant reduction in the mortality and morbidity rates over the last decade, the socio-economic burden of cardiovascular disease is still substantial. Consequently, there is a considerable need for alternative strategies, such as nutraceutical supplementation, that delay the functional vascular decline present in the elderly. Compromised autophagy and oxidative stress (OS) are considered major causes of the age-related endothelial dysfunction...
September 22, 2016: Experimental Gerontology
https://www.readbyqxmd.com/read/27651565/radioprotective-effects-of-hesperidin-on-oxidative-damages-and-histopathological-changes-induced-by-x-irradiation-in-rats-heart-tissue
#15
Abolhasan Rezaeyan, Gholam Hassan Haddadi, Massood Hosseinzadeh, Maryam Moradi, Masoud Najafi
This study was carried out to evaluate radioprotective effects of hesperidin (HES) administration before the irradiation on the cardiac oxidative stress and histopathological changes in an experimental rat model. The cardiovascular complications of radiation exposure cause morbidity and mortality in patients who received radiotherapy. HES, an antioxidant flavonoid found in citrus fruits, suggests the protection against the tissue damage. Fifty-eight rats were divided into four groups: Group 1 received phosphate buffered saline (PBS) and sham radiation; Group 2, HES and sham radiation; Group 3, PBS and radiation; and Group 4, HES and radiation...
July 2016: Journal of Medical Physics
https://www.readbyqxmd.com/read/27643289/br-08-3-management-of-dyslipidemia-in-hypertension
#16
V V Muthusamy
Cardiovascular disease burden is increasing all over the world. The diagnosis of hypertension is considered when a person has persistently elevated BP (Systolic BP more than 140 mmHg and/or Diastolic BP more than 90 mmHg). Dyslipidemia denotes abnormal levels of lipids in the blood (Total Cholesterol >200 mg%, Low density lipoprotein (LDL) >100 mg%, Triglycerides (TGL) >150 mg% and High density lipoprotein (HDL) <40 mg in men and < 50 mg in women. Hypertension and Dyslipidemia constitute the important components of metabolic syndrome as per the definition of NCEP Guidelines-Adult Treatment Panel III (ATP III)...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27634104/chlorogenic-acid-prevents-isoproterenol-induced-dna-damage-in-vascular-smooth-muscle-cells
#17
Jingshuai Wang, Jiyang Li, Jie Liu, Mengjiao Xu, Xiaowen Tong, Jianjun Wang
Numerous clinical therapeutic agents have been identified as DNA damaging. The present study revealed that isoproterenol (Iso) resulted in DNA damage in vascular smooth muscle cells (VSMCs) and increased the levels of intracellular oxygen free radicals. Administration of chlorogenic acid (CGA) inhibited this effect. Pretreatment with CGA abrogated the increase in protein expression levels of γ‑H2A histone family member X, phosphorylated ataxia telangiectasia mutated, phosphorylated Rad3‑related protein, breast cancer 1 and C‑terminal Src homologous kinase induced by Iso...
November 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27633293/the-research-and-development-on-the-antioxidants-in-prevention-of-diabetic-complications
#18
REVIEW
Mohammad Rahimi-Madiseh, Afsaneh Malekpour-Tehrani, Mahmoud Bahmani, Mahmoud Rafieian-Kopaei
Diabetes mellitus can damage the eyes, kidneys, nerves and heart. Microvascular and macrovascular disorders are the leading causes of morbidity and mortality in diabetic patients. Hyperglycemia can increase the indicators of lipid peroxidation and oxidative stress in which free radicals have the main role in the pathogenesis of these complications. Therefore, antioxidants which combat oxidative stress should be able to prevent and repair free radicals induced damages. Although free radicals contribute to kidney damage, atherosclerosis, diabetes, heart disease, nephrotoxicity and hepatotoxicity; however, clinical trials do not uniquely confirm a substantial impact on diabetic damage...
September 2016: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/27532263/polymyxin-b-nephrotoxicity-from-organ-to-cell-damage
#19
Maria de Fátima Fernandes Vattimo, Mirian Watanabe, Cassiane Dezoti da Fonseca, Luciana Barros de Moura Neiva, Edson Andrade Pessoa, Fernanda Teixeira Borges
Polymyxins have a long history of dose-limiting toxicity, but the underlying mechanism of polymyxin B-induced nephrotoxicity is unclear. This study investigated the link between the nephrotoxic effects of polymyxin B on renal metabolic functions and mitochondrial morphology in rats and on the structural integrity of LLC-PK1 cells. Fifteen Wistar rats were divided into two groups: Saline group, rats received 3 mL/kg of 0.9% NaCl intraperitoneally (i.p.) once a day for 5 days; Polymyxin B group, rats received 4 mg/kg/day of polymyxin B i...
2016: PloS One
https://www.readbyqxmd.com/read/27508672/-op-3d-06-relationship-between-different-populations-of-circulating-t-lymphocytes-and-microvascular-oxidative-stress
#20
C De Ciuceis, C Rossini, P Airò, M Scarsi, S Piantoni, A Gavazzi, L Solaini, E Porteri, B Petroboni, C Agabiti Rosei, A Tincani, E Agabiti Rosei, D Rizzoni, F Bertacchini
OBJECTIVE: Both innate and adaptive immune systems may contribute to the pathogenesis of cardiovascular disease and vascular remodeling through inflammation and oxidative stress. Particularly, the balance between Th1 effector lymphocytes (producing interferon-γ) and T regulatory (Treg) lymphocytes, which elicit an anti-inflammatory activity, may be crucial for blood pressure elevation and organ damage development, at least in experimental models. In particular, Tregs have been previously demonstrated to inversely correlate with subcutaneous small resistance artery media to lumen ratio (M/L) and retinal arteriole wall to lumen ratio (W/L) (unpublished data)...
September 2016: Journal of Hypertension
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