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Reactive oxygen species,endothelial damage

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https://www.readbyqxmd.com/read/28512147/nrf2-inactivation-enhances-placental-angiogenesis-in-a-preeclampsia-mouse-model-and-improves-maternal-and-fetal-outcomes
#1
Masahiro Nezu, Tomokazu Souma, Lei Yu, Hiroki Sekine, Nobuyuki Takahashi, Andrew Zu-Sern Wei, Sadayoshi Ito, Akiyoshi Fukamizu, Zsuzsanna K Zsengeller, Tomohiro Nakamura, Atsushi Hozawa, S Ananth Karumanchi, Norio Suzuki, Masayuki Yamamoto
Placental activation of the renin-angiotensin system (RAS) plays a key role in the pathogenesis of preeclampsia. Reactive oxygen species (ROS) are thought to affect placental angiogenesis, which is critical for preventing preeclampsia pathology. We examined the role of ROS in preeclampsia by genetically modifying the Keap1-Nrf2 pathway, a cellular antioxidant defense system, in a mouse model of RAS-induced preeclampsia. Nrf2 deficiency would be expected to impair cellular antioxidant responses; however, Nrf2 deficiency in preeclamptic mice improved maternal and fetal survival, ameliorated intra-uterine growth retardation, and augmented oxidative DNA damage...
May 16, 2017: Science Signaling
https://www.readbyqxmd.com/read/28476714/investigation-of-anti-proliferative-and-antioxidative-effects-of-some-bis-%C3%AE-amino-phosphinic-acid-derivatives
#2
Taner Dastan, Sevgi Durna Dastan, Mehmet Atas, Cahit Orek, Pelin Koparir, Akif Evren Parlak, Inanc Baral, Metin Koparir, Ahmet Cetin
Aminophosphinic acids which are organophosphorus compounds widely investigated for potential production of antibacterial, antitumor and antiviral materials. In vitro antioxidant, cytotoxic and antimicrobial activities of synthesized novel compounds of 8 different bis(β-amino alkyl)phosphinic acids (4a-h) were investigated on MCF-7 breast adenocarcinoma cell and human umbilical vein endothelial cell (HUVEC) cultures. Malondialdehyde (MDA) levels were evaluated as an indication of lipid peroxidation in cell cultures for antioxidant capacities...
September 2016: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28466788/vanadium-iii-l-cysteine-enhances-the-sensitivity-of-murine-breast-adenocarcinoma-cells-to-cyclophosphamide-by-promoting-apoptosis-and-blocking-angiogenesis
#3
Abhishek Basu, Arin Bhattacharjee, Rathindranath Baral, Jaydip Biswas, Amalesh Samanta, Sudin Bhattacharya
Various epidemiological and preclinical studies have already established the cancer chemopreventive potential of vanadium-based compounds. In addition to its preventive efficacy, studies have also indicated the abilities of vanadium-based compounds to induce cell death selectively toward malignant cells. Therefore, the objective of the present investigation is to improve the therapeutic efficacy and toxicity profile of an alkylating agent, cyclophosphamide, by the concurrent use of an organovanadium complex, vanadium(III)-l-cysteine...
May 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28463509/glycol-chitosan-engineered-autoregenerative-antioxidant-significantly-attenuates-pathological-damages-in-models-of-age-related-macular-degeneration
#4
Rajendra N Mitra, Ruijuan Gao, Min Zheng, Ming-Jing Wu, Maxim A Voinov, Alex I Smirnov, Tatyana I Smirnova, Kai Wang, Sai Chavala, Zongchao Han
Age-related macular degeneration (AMD) is the foremost cause of irreversible blindness in people over the age of 65 especially in developing countries. Therefore, an exploration of effective and alternative therapeutic interventions is an unmet medical need. It has been established that oxidative stress plays a key role in the pathogenesis of AMD, and hence, neutralizing oxidative stress is an effective therapeutic strategy for treatment of this serious disorder. Owing to autoregenerative properties, nanoceria has been widely used as a nonenzymatic antioxidant in the treatment of oxidative stress related disorders...
May 5, 2017: ACS Nano
https://www.readbyqxmd.com/read/28440512/astemizole-protects-against-human-umbilical-vein-endothelial-cell-injury-induced-by-hydrogen-peroxide-via-the-p53-signaling-pathway
#5
Jia-Nan Tian, Xiao-Dong Shi, Xiao-Kun Wang, Shuang Wang, Jing-Xue Xu, Chun-Xiao Yang
Astemizole has gained attention as an antineoplastic drug that targets important ion channels. The present study aimed to investigate the protective effects of astemizole against hydrogen peroxide (H2O2)‑induced oxidative damage to human umbilical vein endothelial cells (HUVECs). HUVECs were pretreated with astemizole (0.5 and 1 µM) for 12 h, then exposed to H2O2 (200 µM) for 12 h. Cell viability was measured using the MTT assay. The levels of malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GSH‑Px), reactive oxygen species (ROS) and apoptotic percentage were determined...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28430357/reactive-oxygen-species-key-regulators-in-vascular-health-and-diseases
#6
REVIEW
Qishan Chen, Qiwen Wang, Jianhua Zhu, Qingzhong Xiao, Li Zhang
Reactive oxygen species (ROS) are a group of small reactive molecules that play critical roles in the regulation of various cell functions and biological processes. In the vascular system, physiological levels of ROS are essential for normal vascular functions including endothelial homeostasis and smooth muscle cell contraction. In contrast, uncontrolled overproduction of ROS resulted from imbalance of ROS generation and elimination, leads to the development of vascular diseases. Excessive ROS cause vascular cell damages, recruitment of inflammatory cells, lipid peroxidation, activation of metalloproteinases, and deposition of extracellular matrix, collectively leading to vascular remodeling...
April 21, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28407763/klotho-ameliorates-oxidized-low-density-lipoprotein-ox-ldl-induced-oxidative-stress-via-regulating-lox-1-and-pi3k-akt-enos-pathways
#7
Yansheng Yao, Yanbing Wang, Yibo Zhang, Chang Liu
BACKGROUND: Atherosclerosis is a common cardiovascular disease that causes myocardial infarction, heart failure, and stroke. Increased oxidized low density lipoprotein (ox-LDL) in the sub-endothelium is the characteristic origin of atherogenesis. Klotho, an anti-aging protein, has been reported to protect against atherosclerosis and ameliorate endothelial dysfunction in vivo. The aim of this study is to investigatethe anti-oxidative activity of Klothoin ox-LDL-treated human umbilical vein endothelial cells (HUVECs)...
April 13, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28407238/quercetin-hyperin-and-chlorogenic-acid-improve-endothelial-function-by-antioxidant-antiinflammatory-and-ace-inhibitory-effects
#8
Wu-Yang Huang, Lin Fu, Chun-Yang Li, Li-Ping Xu, Li-Xia Zhang, Wei-Min Zhang
In recent years, the blueberry cultivation and processing industry developed quickly because blueberries are super-fruit with healthy function. Blueberry leaves are byproducts of the blueberry industry, which are rich in bioactive phenolics, such as quercetin (Q), hyperin (H), and chlorogenic acid (C). This study investigated protective effects of 3 phenolics (Q, H, and C) from leaves of rabbiteye blueberry Vaccinium ashei on human umbilical vein endothelial cells. The results showed that all these 3 phenolics could improve endothelial function by inhibiting oxidative damage and proinflammatory cytokines caused by tumor necrosis factor-α (TNF-α)...
May 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28395990/protective-effects-of-fluoroquinolones-on-uv-induced-damage-of-cultured-ocular-cell-lines
#9
Takashi Nishida, Yoshiki Kuse, Kiyofumi Mochizuki, Masamitsu Shimazawa, Tetsuya Yamamoto, Hideaki Hara
Although the fluoroquinolones have strong antibacterial effects, some of them also have adverse ocular effects such as diplopia, uveitis, optic neuropathy, and retinal detachment. The purpose of this study was to determine whether low concentrations of fluoroquinolones can lessen the cytotoxic effects of ultraviolet (UV) light on different kinds of cultured ocular cells. We studied cultured human corneal endothelial cells (HCECs), a retinal ganglion cell line (RGC-5), a mouse-derived photoreceptor cell line (661W), a human adult retinal pigment epithelial cell line (ARPE-19), primary retinal cells, and primary human RPE cells...
April 7, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28352154/hmgb1-sirna-can-reduce-damage-to-retinal-cells-induced-by-high-glucose-in-vitro-and-in-vivo
#10
Shuang Jiang, Xiaolong Chen
BACKGROUND: Diabetic retinopathy (DR), one of the most common complications of late-phase diabetes, is associated with many risk factors, among which continuous low-grade inflammation is one of the principal ones. As such, lowering inflammation levels and maintain the viability of human retinal endothelial cells (HRECs) are critical for DR therapy. HMGB1 is a well-known proinflammatory cytokine. However, whether HMGB1 small interfering RNA (siRNA) can protect retina cells under a high-glucose environment from morphological changes and functional abnormalities remain undetermined...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28347738/dna-damage-dependent-mechanisms-of-ageing-and-disease-in-the-macro-and-microvasculature
#11
Aarti V Shah, Martin R Bennett
A decline in the function of the macro- and micro-vasculature occurs with ageing. DNA damage also accumulates with ageing, and thus DNA damage and repair have important roles in physiological ageing. Considerable evidence also supports a crucial role for DNA damage in the development and progression of macrovascular disease such as atherosclerosis. These findings support the concept that prolonged exposure to risk factors is a major stimulus for DNA damage within the vasculature, in part via the generation of reactive oxygen species...
March 24, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28337260/mir-590-3p-mediates-the-protective-effect-of-curcumin-on-injured-endothelial-cells-induced-by-angiotensin-ii
#12
Tian Wu, Yuanyuan Xiang, Yu Lv, Dai Li, Lijin Yu, Ren Guo
Curcumin (Cur) has multiple pharmacological effects including antitumor, anti-inflammatory, antioxidant and cardiovascular protective effects. This research aims to further explore whether the cardiovascular protective effects of Cur are mediated by the miR-590-3p/CD40 pathway. Endothelial cells (ECs) were cultivated with 10(-7) mol/L angiotensin II (Ang II) to establish a damage model. Real-time PCR was used to determine the expression of CD40 and eNOS mRNA on ECs. The protein expressions of CD40 and eNOS were detected by Western blot analysis...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28333905/-the-inflammatory-processes-in-atherogenesis
#13
Natalia Cichoń, Dominika Lach, Angela Dziedzic, Michał Bijak, Joanna Saluk
Atherogenesis is the process of atherosclerotic plaque formation, leading to coronary artery heart disease. This process involves immune cells, mainly T and B cells, monocytes and macrophages. The process of atherogenesis is induced by inflammatory damage of endothelial cells. The characteristic construction features of the atherosclerotic plaque is a predisposing factor for acute coronary syndromes. The accumulation of inflammatory cells in the artery inner membrane enhances the local inflammatory process due to the secretion of reactive oxygen species, inflammatory cytokines and metalloproteinases, which accelerate the development of atherosclerotic lesions in the arteries...
March 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28330785/the-interplay-between-angiotensin-ii-tlr4-and-hypertension
#14
REVIEW
Vinicia Campana Biancardi, Gisele Facholi Bomfim, Wagner Luis Reis, Sarah Al-Gassimi, Kenia Pedrosa Nunes
Hypertension is a multifactorial disease. Although a number of different underlying mechanisms have been learned from the various experimental models of the disease, hypertension still poses challenges for treatment. Angiotensin II plays an unquestionable role in blood pressure regulation acting through central and peripheral mechanisms. During hypertension, dysregulation of the Renin-Angiotensin System is associated with increased expression of pro-inflammatory cytokines and reactive oxygen species causing kidney damage, endothelial dysfunction, and increase in sympathetic activity, among other damages, eventually leading to decline in organ function...
June 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28315342/ethanol-induced-erectile-dysfunction-and-increased-expression-of-pro-inflammatory-proteins-in-the-rat-cavernosal-smooth-muscle-are-mediated-by-nadph-oxidase-derived-reactive-oxygen-species
#15
Letícia N Leite, Gabriel T do Vale, Janaina A Simplicio, Bruno S De Martinis, Fernando S Carneiro, Carlos R Tirapelli
Ethanol consumption is associated with an increased risk of erectile dysfunction (ED), but the molecular mechanisms through which ethanol causes ED remain elusive. Reactive oxygen species are described as mediators of ethanol-induced cell toxicity/damage in distinctive tissues. The enzyme NADPH oxidase is the main source of reactive oxygen species in the endothelium and vascular smooth muscle cells and ethanol is described to increase NADPH oxidase activation and reactive oxygen species generation. This study evaluated the contribution of NADPH oxidase-derived reactive oxygen species to ethanol-induced ED, endothelial dysfunction and production of pro-inflammatory and redox-sensitive proteins in the rat cavernosal smooth muscle (CSM)...
June 5, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28288978/mff-dependent-mitochondrial-fission-contributes-to-the-pathogenesis-of-cardiac-microvasculature-ischemia-reperfusion-injury-via-induction-of-mros-mediated-cardiolipin-oxidation-and-hk2-vdac1-disassociation-involved-mptp-opening
#16
Hao Zhou, Shunying Hu, Qinhua Jin, Chen Shi, Ying Zhang, Pingjun Zhu, Qiang Ma, Feng Tian, Yundai Chen
BACKGROUND: The cardiac microvascular system ischemia/reperfusion injury following percutaneous coronary intervention is a clinical thorny problem. This study explores the mechanisms by which ischemia/reperfusion injury induces cardiac microcirculation collapse. METHODS AND RESULTS: In wild-type mice, mitochondrial fission factor (Mff) expression increased in response to acute microvascular ischemia/reperfusion injury. Compared with wild-type mice, homozygous Mff-deficient (Mff(gt)) mice exhibited a smaller infarcted area, restored cardiac function, improved blood flow, and reduced microcirculation perfusion defects...
March 13, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28286103/the-vascular-protective-effects-of-anoectochilus-roxburghii-polysaccharose-under-high-glucose-conditions
#17
Zhen-Ling Liu, Jian-Gang Zhang, Qing Liu, Li-Tao Yi, Yu-Meng Li, Ya Li
ETHNOPHARMACOLOGICAL RELEVANCE: Anoectochilus roxburghii has been used as a health food and a herb for treatment diabetes in China for hundreds years. Anoectochilus roxburghii polysaccharose (ARP) is the major active component of the plant. AIM OF THE STUDY: The present study investigated the vascular protection of ARP in vivo and in vitro experiments. MATERIALS AND METHODS: Hypoglycemic activity of ARP was examined in diabetic mice. Moreover, the further vascular protective effects in vitro were investigated in human umbilical vein endothelial cells (HUVECs) stimulated by high glucose (HG, 35mM)...
March 9, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28282959/combined-effect-of-silica-nanoparticles-and-benzo-a-pyrene-on-cell-cycle-arrest-induction-and-apoptosis-in-human-umbilical-vein-endothelial-cells
#18
Collins Otieno Asweto, Jing Wu, Hejing Hu, Lin Feng, Xiaozhe Yang, Junchao Duan, Zhiwei Sun
Particulate matter (PM) such as ultrafine particulate matter (UFP) and the organic compound pollutants such as polycyclic aromatic hydrocarbon (PAH) are widespread in the environment. UFP and PAH are present in the air, and their presence may enhance their individual adverse effects on human health. However, the mechanism and effect of their combined interactions on human cells are not well understood. We investigated the combined toxicity of silica nanoparticles (SiNPs) (UFP) and Benzo[a]pyrene (B[a]P) (PAH) on human endothelial cells...
March 9, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28259164/n-butanol-extracts-of-morinda-citrifolia-suppress-advanced-glycation-end-products-age-induced-inflammatory-reactions-in-endothelial-cells-through-its-anti-oxidative-properties
#19
Yuji Ishibashi, Takanori Matsui, Fumiyuki Isami, Yumi Abe, Tatsuya Sakaguchi, Yuichiro Higashimoto, Sho-Ichi Yamagishi
BACKGROUND: Advanced glycation end products (AGEs), senescent macroprotein derivatives formed during a normal aging process and acceleratedly under diabetic conditions, play a role in atherosclerotic cardiovascular disease. AGEs cause endothelial cell (EC) damage, an initial trigger for atherosclerosis through the interaction with a receptor for AGEs (RAGE). We have previously shown that n-butanol extracts of Morinda citrifolia (noni), a plant belonging to the family Rubiaceae, block the binding of AGEs to RAGE in vitro...
March 4, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28252551/effect-of-baicalin-on-oxygen-glucose-deprivation-induced-endothelial-cell-damage
#20
Si Luo, Shi Li, Lei Zhu, Shu-Huan Fang, Jun-Li Chen, Qing-Qing Xu, Hong-Ying Li, Na-Chuan Luo, Cong Yang, Dan Luo, Lin Li, Xiao-Hui Ma, Rong Zhang, Hong Wang, Yun-Bo Chen, Qi Wang
Baicalin, a plant-derived flavonoid, has been reported to exert neuroprotective effects on ischemia-like or excitotoxic injury. To confirm this function and explore the possible mechanism, we investigated the protective effect of baicalin on an in-vitro model of ischemia (oxygen-glucose deprivation-treated endothelial cell). In the present study, we found that baicalin (100 μM) inhibited cell death, reduced cell membrane damage, and maintained the integrity of the nucleus. Flow cytometric analysis and Hoechst 33258/propidium iodide double staining results showed that the necroptosis ratio decreased with baicalin treatment...
April 12, 2017: Neuroreport
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