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Reactive oxygen species,endothelial damage

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https://www.readbyqxmd.com/read/29024402/blueberry-metabolites-attenuate-lipotoxicity-induced-endothelial-dysfunction
#1
Divya Bharat, Rafaela Ramos Mororo Cavalcanti, Chrissa Petersen, Nathan Begaye, Brett Ronald Cutler, Marcella Melo Assis Costa, Renata Kelly Luna Gomes Ramos, Marina Ramos Ferreira, Youyou Li, Leena P Bharath, Emma Toolson, Paul Sebahar, Ryan E Looper, Thunder Jalili, Namakkal S Rajasekaran, Zhenquan Jia, J David Symons, Anandh Babu Pon Velayutham
SCOPE: Lipotoxicity-induced endothelial dysfunction is an important vascular complication associated with diabetes. Clinical studies support the vascular benefits of blueberry anthocyanins, but the underlying mechanism is unclear. We tested the hypothesis that metabolites of blueberry anthocyanins attenuate lipotoxicity-induced endothelial dysfunction. METHODS AND RESULTS: Human aortic endothelial cells (HAECs) were treated for 6 h with either: (i) the parent anthocyanins (malvidin-3-glucoside and cyanidin-3-glucoside); or (ii) the blueberry metabolites (hydroxyhippuric acid, hippuric acid, benzoic acid-4-sulfate, isovanillic acid-3-sulfate, and vanillic acid-4-sulfate), at concentrations known to circulate in humans following blueberry consumption...
October 12, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29019365/blueberry-supplementation-attenuates-oxidative-stress-within-monocytes-and-modulates-immune-cell-levels-in-adults-with-metabolic-syndrome-a-randomized-double-blind-placebo-controlled-trial
#2
Anand R Nair, Nithya Mariappan, April J Stull, Joseph Francis
BACKGROUND: Blueberries (BB) have been shown to improve insulin sensitivity and endothelial function in obese and pre-diabetic humans, and decrease oxidative stress and inflammation, and ameliorate cardio-renal damage in rodents. This indicates that blueberries have a systemic effect and are not limited to a particular organ system. In order for blueberries to exert beneficial effects on the whole body, the mechanism would logically have to operate through modulation of cellular humoral factors...
October 11, 2017: Food & Function
https://www.readbyqxmd.com/read/28988496/6-gingerol-prevents-mehp-induced-dna-damage-in-human-umbilical-vein-endothelia-cells
#3
G Yang, X Gao, L Jiang, X Sun, X Liu, M Chen, X Yao, Q Sun, S Wang
Mono (2-ethylhexyl) phthalate (MEHP) is the principal metabolite of di (2-etylhexyl) phthalate, which is widely used as a plasticizer, especially in medical devices. MEHP has toxic effects on cardiovascular system. The aim of this study was to investigate the possibility that 6-gingerol may inhibit the oxidative DNA damage of MEHP in human umbilical vein endothelial cells (HUVECs) and the potential mechanism. The comet assay was used to monitor DNA strand breaks. We have shown that 6-gingerol significantly reduced the DNA strand breaks caused by MEHP...
November 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28965081/sirt1-sirt3-axis-regulates-human-blood-brain-barrier-permeability-in-response-to-ischemia
#4
Tao Chen, Shu-Hui Dai, Xia Li, Peng Luo, Jie Zhu, Yu-Hai Wang, Zhou Fei, Xiao-Fan Jiang
Sirtuin1 (Sirt1) and Sirtuin3 (Sirt3) are two well-characterized members of the silent information regulator 2 (Sir2) family of proteins. Both Sirt1 and Sirt3 have been shown to play vital roles in resistance to cellular stress, but the interaction between these two sirtuins has not been fully determined. In this study, we investigated the role of Sirt1-Sirt3 axis in blood-brain barrier (BBB) permeability after ischemia in vitro. Human brain microvascular endothelial cells and astrocytes were co-cultured to model the BBB in vitro and oxygen and glucose deprivation (OGD) was performed to mimic ischemia...
September 22, 2017: Redox Biology
https://www.readbyqxmd.com/read/28962149/dl-3-n-butylphthalide-protects-endothelial-cells-against-advanced-glycation-end-product-induced-injury-by-attenuating-oxidative-stress-and-inflammation-responses
#5
Chang-Yun Liu, Zhen-Hua Zhao, Zhi-Ting Chen, Chun-Hui Che, Zhang-Yu Zou, Xiao-Min Wu, Sheng-Gen Chen, Yuan-Xiao Li, Han-Bin Lin, Xiao-Fan Wei, Jie You, Hua-Pin Huang
Endothelial dysfunction, regarded as a key step in the pathophysiological course of diabetic vascular complications, is initiated and deteriorated by advanced glycation end products (AGEs). DL-3-n-butylphthalide (DL-NBP) has been proven to have protective effects on neurons and vascular endothelial cells against ischemic and anoxic damage. The aim of the present study was to investigate whether NBP is able to attenuate AGE-induced endothelial dysfunction in vitro, and also elucidate the possible underlying mechanism...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28959203/endoplasmic-reticulum-stress-mediates-methamphetamine-induced-blood-brain-barrier-damage
#6
Xiaojuan Qie, Di Wen, Hongyan Guo, Guanjie Xu, Shuai Liu, Qianchao Shen, Yi Liu, Wenfang Zhang, Bin Cong, Chunling Ma
Methamphetamine (METH) abuse causes serious health problems worldwide, and long-term use of METH disrupts the blood-brain barrier (BBB). Herein, we explored the potential mechanism of endoplasmic reticulum (ER) stress in METH-induced BBB endothelial cell damage in vitro and the therapeutic potential of endoplasmic reticulum stress inhibitors for METH-induced BBB disruption in C57BL/6J mice. Exposure of immortalized BMVEC (bEnd.3) cells to METH significantly decreased cell viability, induced apoptosis, and diminished the tightness of cell monolayers...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28945469/pharmacologic-protection-of-mitochondrial-dna-integrity-may-afford-a-new-strategy-for-suppressing-lung-ischemia-reperfusion-injury
#7
Yong B Tan, Sujata Mulekar, Olena Gorodnya, Michael J Weyant, Martin R Zamora, Jon D Simmons, Tiago Machuka, Mark N Gillespie
Lung ischemia-reperfusion (IR) injury contributes to post-transplant complications, including primary graft dysfunction. Decades of reports show that reactive oxygen species generated during lung IR contribute to pulmonary vascular endothelial barrier disruption and edema formation, but the specific target molecule(s) that "sense" injury-inducing oxidant stress to activate signaling pathways culminating in pathophysiologic changes have not been established. This review discusses evidence that mitochondrial DNA (mtDNA) may serve as a molecular sentinel wherein oxidative mtDNA damage functions as an upstream trigger for lung IR injury...
September 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28944893/pigment-epithelium%C3%A2-derived-factor-protects-human-glomerular-mesangial-cells-from-diabetes-via-noxo1%C3%A2-inos-suppression
#8
Ling Gao, Yingjie Hu, Jing Li
The authors previously reported that pigment epithelium‑derived factor (PEDF) protects the diabetic kidney from fibrosis via its anti‑oxidative effects. However, the underlying molecular mechanism has never been revealed. The present study aimed to investigate how PEDF protects mesangial cells from diabetes induced damage. Human mesangial cells were exposed to a diabetic environment [30 mmol/l glucose and 200 mg advanced glycation end products (AGEs)] in the absence or presence of PEDF (200 mg/l). The superoxide and peroxynitrite productions were measured by fluorescent assay...
September 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28944884/antioxidant-and-anti%C3%A2-inflammatory-effects-of-dhk%C3%A2-medicated-serum-on-high-glucose%C3%A2-induced-injury-in-endothelial-cells
#9
Ziyang Zhang, Wenpei Chen, Yandong Wang, Tianqin Xiong, Chenghao Zhou, Xiaolan Yao, Baoqin Lin
It has been shown that oxidative damage and inflammation caused by hyperglycemia in endothelial cells are key factors triggering diabetic vascular complications. The aim of the present study was to investigate the antioxidant and anti‑inflammatory effects of Danhong Huayu Koufuye (DHK)‑medicated serum on high glucose (HG)‑induced injury in endothelial cells, and examine its underlying mechanisms. EA. hy926 cells were treated with normal glucose, HG, or HG with DHK‑medicated serum. Cell viability was assessed using the MTT method...
September 21, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28932625/vascular-aging-implications-for-cardiovascular-disease-and-therapy
#10
Yohannes T Ghebre, Eduard Yakubov, Wing Tak Wong, Prasanna Krishnamurthy, Nazish Sayed, Andrew G Sikora, Mark D Bonnen
The incidence and prevalence of cardiovascular disease is highest among the elderly, in part, due to deleterious effects of advancing age on the heart and blood vessels. Aging, a known cardiovascular risk factor, is progressively associated with structural and functional changes to the vasculature including hemodynamic disturbance due to increased oxidative stress, premature cellular senescence and impairments in synthesis and/or secretion of endothelium-derived vasoactive molecules. These molecular and physiological changes lead to vessel wall stiffening and thickening, as well as other vascular complications that culminate to loss of vascular tone regulation and endothelial function...
December 2016: Translational Medicine: Current Research
https://www.readbyqxmd.com/read/28919014/regulation-and-function-of-endothelial-glycocalyx-layer-in-vascular-diseases
#11
REVIEW
Irina Sieve, Anja K Münster-Kühnel, Denise Hilfiker-Kleiner
In the vascular system, the endothelial surface layer (ESL) as the inner surface of blood vessels affects mechanotransduction, vascular permeability, rheology, thrombogenesis, and leukocyte adhesion. It creates barriers between endothelial cells and blood and neighbouring cells. The glycocalyx, composed of glycoconjugates and proteoglycans, is an integral component of the ESL and a key element in inter- and intracellular communication and tissue homeostasis. In pathophysiological conditions (atherosclerosis, infection, ischemia/reperfusion injury, diabetes, trauma and acute lung injury) glycocalyx-degrading factors, i...
September 12, 2017: Vascular Pharmacology
https://www.readbyqxmd.com/read/28901519/salidroside-a-scavenger-of-ros-enhances-the-radioprotective-effect-of-ex-rad%C3%A2-via-a-p53-dependent-apoptotic-pathway
#12
Tian Feng, Libin Wang, Nan Zhou, Chang Liu, Jiahui Cui, Rangxin Wu, Juan Jing, Shengyong Zhang, Hui Chen, Siwang Wang
Salidroside (Sal), the predominant component of a Chinese medicinal herb, Rhodiola rosea L., has become an attractive bioagent due to its significant anti-radiation, antioxidant and immune adjustment effects. We explored the radioprotective effect of Sal to ascertain whether it could enhance the anti-radiation effect of ON 01210.Na (Ex-RAD®) in vivo and in vitro, and elucidate its underlying mechanism. Our data demonstrated that Sal inhibited radiation-induced apoptosis, scavenged reactive oxygen species (ROS), and decreased the DNA damage of human umbilical vein endothelial cells (HUVECs)...
September 6, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28901439/long-noncoding-rna%C3%A2-p21-modulates-cellular-senescence-via-the-wnt-%C3%AE-%C3%A2-catenin-signaling-pathway-in-mesenchymal-stem-cells
#13
Wenzheng Xia, Lei Zhuang, Xia Deng, Meng Hou
Mesenchymal stem cell (MSC)‑based therapies have demonstrated efficacy in animal models of cardiovascular diseases. However, MSCs decrease in quantity and quality with age, which reduces their capacity for damage repair. Long noncoding (lnc) RNAs regulate gene transcription and the fate of post‑transcriptional mRNA, affecting a broad range of age‑associated physiological and pathological conditions, including cardiovascular disease and cancer cell senescence. However, the functional role of lncRNAs in stem cell senescence remains largely unknown...
September 7, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28899493/protective-effects-of-paeoniflorin-against-aopp-induced-oxidative-injury-in-huvecs-by-blocking-the-ros-hif-1%C3%AE-vegf-pathway
#14
Shaolian Song, Xiaoyan Xiao, Dan Guo, Liqian Mo, Can Bu, Wenbin Ye, Quanwen Den, Shiting Liu, Xixiao Yang
BACKGROUND: Paeoniflorin, a monoterpene glycoside, exerts protective vascular effects, showing good antioxidant properties. However, whether Paeoniflorin has protective effect against the oxidative damage induced by advanced oxidation protein products (AOPPs) in Human umbilical vein endothelial cells (HUVECs) is unknown, as is the underlying mechanism. PURPOSE: The present study was designed to investigate the effect of Paeoniflorin on oxidative damage of HUVECs and elucidate its underlying molecular mechanisms...
October 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28894214/the-novel-compound-sul-121-preserves-endothelial-function-and-inhibits-progression-of-kidney-damage-in-type-2-diabetes-mellitus-in-mice
#15
S P H Lambooy, A Bidadkosh, D Nakladal, A van Buiten, R A T Girgis, A C van der Graaf, T J Wiedenmann, R A Koster, P Vogelaar, H Buikema, R H Henning, L E Deelman
Diabetic nephropathy is still a common complication of type 2 diabetes mellitus (T2DM) and improvement of endothelial dysfunction (ED) and inhibition of reactive oxygen species (ROS) are considered important targets for new therapies. Recently, we developed a new class of compounds (Sul compounds) which inhibit mitochondrial ROS production. Here, we tested the therapeutic effects of Sul-121 on ED and kidney damage in experimental T2DM. Diabetic db/db and lean mice were implanted with osmotic pumps delivering Sul-121 (2...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28889229/melatonin-alleviates-inflammation-induced-apoptosis-in-human-umbilical-vein-endothelial-cells-via-suppression-of-ca-2-xo-ros-drp1-mitochondrial-fission-axis-by-activation-of-ampk-serca2a-pathway
#16
Jiasen Cui, Zeng Li, Shunjiu Zhuang, Shaohong Qi, Li Li, Junwen Zhou, Wan Zhang, Yun Zhao
Endothelia inflammation damage is vital to the development and progression of chronic venous disease. In the present study, we explored the protective effect of melatonin on endothelia apoptosis induced by LPS, particularly focusing on the mitochondrial fission. We demonstrated that human umbilical vein endothelial cells (HUVEC) subjected to LPS for 12 h exhibited a higher apoptotic rate. However, melatonin (1-20 μM) treatment 12 h before LPS had the ability to protect HUVEC cell against LPS-mediated apoptosis in a dose-dependent manner...
September 9, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28885574/release-of-vegf-from-dental-implant-improves-osteogenetic-process-preliminary-in-vitro-tests
#17
Barbara Zavan, Letizia Ferroni, Chiara Gardin, Stefano Sivolella, Adriano Piattelli, Eitan Mijiritsky
INTRODUCTION: During osseointegration process, the presence of an inflammatory event could negatively influence the proper osteogenetic ability of the implant surface. In order to reduce this possibility, an implementation of angiogenetic event through the release of Vascular Endothelial Growth Factor (VEGF) can be a tool as co-factor for osteoblastic differentiation. In this paper, novel dental implant surfaces enriched with VEGF have been tested. MATERIAL AND METHODS: The ability of VEGF-enriched titanium implants to improve the osteogenetic properties of Mesenchymal stem cells (MSC), also in the presence of an inflammatory environment, have been in vitro tested...
September 8, 2017: Materials
https://www.readbyqxmd.com/read/28869535/mitochondrial-targeted-antioxidant-maintains-blood-flow-mitochondrial-function-and-redox-balance-in-old-mice-following-prolonged-limb-ischemia
#18
Shunsuke Miura, Shu-Ichi Saitoh, Tomoki Kokubun, Takashi Owada, Hiroyuki Yamauchi, Hirofumi Machii, Yasuchika Takeishi
Aging is a major factor in the decline of limb blood flow with ischemia. However, the underlying mechanism remains unclear. We investigated the role of mitochondrial reactive oxygen species (ROS) with regard to limb perfusion recovery in aging during ischemia. We performed femoral artery ligation in young and old mice with or without treatment with a scavenger of mitochondrial superoxide, MitoTEMPO (180 μg/kg/day, from pre-operative day 7 to post-operative day (POD) 21) infusion using an implanted mini-pump...
September 4, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28869457/anti-inflammatory-effects-of-a-novel-iron-chelator-dibi-in-experimental-sepsis
#19
Taylor Thorburn, Maral Aali, Lisanne Kostek, Chloe LeTourneau-Paci, Patricia Colp, Juan Zhou, Bruce Holbein, David Hoskin, Christian Lehmann
BACKGROUND: Iron catalyzes the generation of reactive oxygen species (ROS) as part of the innate antimicrobial defense. During sepsis, the dysregulated systemic inflammatory response to infection, iron homeostasis becomes disrupted, generating an excess of ROS causing damage to tissues. This can be potentially suppressed using iron chelators that selectively bind iron to prevent its participation in ROS-related inflammatory reactions. OBJECTIVE: We hypothesize that administration of DIBI, a novel iron-chelator, attenuates the dysregulated systemic immune response and reduces tissue damage in experimental endotoxemia...
August 28, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28859673/multiple-therapeutic-effect-of-endothelial-progenitor-cell-regulated-by-drugs-in-diabetes-and-diabetes-related-disorder
#20
REVIEW
Rashmi K Ambasta, Harleen Kohli, Pravir Kumar
BACKGROUND: Reduced levels of endothelial progenitor cells (EPCs) counts have been reported in diabetic mellitus (DM) patients and other diabetes-related disorder. EPCs are a circulating, bone marrow-derived cell population that appears to participate in vasculogenesis, angiogenesis and damage repair. These EPC may revert the damage caused in diabetic condition. We aim to identify several existing drugs and signaling molecule, which could alleviate or improve the diabetes condition via mobilizing and increasing EPC number as well as function...
August 31, 2017: Journal of Translational Medicine
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