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https://www.readbyqxmd.com/read/28793292/huangqi-decoction-ameliorates-streptozotocin-induced-rat-diabetic-nephropathy-through-antioxidant-and-regulation-of-the-tgf-%C3%AE-mapk-ppar-%C3%AE-signaling
#1
Haiyan Han, Aili Cao, Li Wang, Hengjiang Guo, Yingjun Zang, Zezheng Li, Xuemei Zhang, Wen Peng
BACKGROUND/AIMS: Huangqi Decoction (HQD) has been traditionally used to treat diabetes mellitus in China. The present study was carried out to assess the protective effect of HQD on diabetic nephropathy (DN) using the streptozotocin-induced (STZ) diabetic rats. METHODS: Diabetes was induced by a single intraperitoneal injection of STZ (60 mg/kg) in male Wistar rats. 40 diabetic rats were divided into 5 groups: vehicle-treated (DN group), 0.45, 0.15, 0.05 g/kg HQD-treated diabetic group (HQD group) and 1 mg/kg rosiglitazone-treated diabetic group (RGZ group)...
August 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28764528/development-of-a-high-speed-vacuum-ultraviolet-vuv-imaging-system-for-the-experimental-advanced-superconducting-tokamak
#2
Fan Zhou, Tingfeng Ming, Yumin Wang, Zhijun Wang, Feifei Long, Qing Zhuang, Guoqiang Li, Yunfeng Liang, Xiang Gao
A high-speed vacuum ultraviolet (VUV) imaging system for edge plasma studies is being developed on the Experimental Advanced Superconducting Tokamak (EAST). Its key optics is composed of an inverse type of Schwarzschild telescope made of a set of Mo/Si multilayer mirrors, a micro-channel plate (MCP) equipped with a P47 phosphor screen and a high-speed camera with CMOS sensors. In order to remove the contribution from low-energy photons, a Zr filter is installed in front of the MCP detector. With this optics, VUV photons with a wavelength of 13...
July 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28757373/anti-inflammatory-mechanism-of-galangin-in-lipopolysaccharide-stimulated-microglia-critical-role-of-ppar-%C3%AE-signaling-pathway
#3
Min-Ji Choi, Eun-Jung Lee, Jin-Sun Park, Su-Nam Kim, Eun-Mi Park, Hee-Sun Kim
Since microglia-associated neuroinflammation plays a pivotal role in the progression of neurodegenerative diseases, controlling microglial activation has been suggested as a potential therapeutic strategy. Here, we investigated the anti-inflammatory effects of galangin (3,5,7-trihydroxyflavone) in microglia and analyzed the underlying molecular mechanisms. Galangin inhibited the expression of inducible nitric oxide synthase (iNOS) and pro-inflammatory cytokines and enhanced the expression of anti-inflammatory interleukin (IL)-10 in lipopolysaccharide (LPS)-stimulated BV2 microglia...
July 28, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28755362/functional-assembly-of-soluble-and-membrane-recombinant-proteins-of-mammalian-nadph-oxidase-complex
#4
Hajer Souabni, Aymen Ezzine, Tania Bizouarn, Laura Baciou
Activation of phagocyte cells from an innate immune system is associated with a massive consumption of molecular oxygen to generate highly reactive oxygen species (ROS) as microbial weapons. This is achieved by a multiprotein complex, the so-called NADPH oxidase. The activity of phagocyte NADPH oxidase relies on an assembly of more than five proteins, among them the membrane heterodimer named flavocytochrome b 558 (Cytb 558), constituted by the tight association of the gp91(phox) (also named Nox2) and p22(phox) proteins...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28751937/myricitrin-modulates-nadph-oxidase-dependent-ros-production-to-inhibit-endotoxin-mediated-inflammation-by-blocking-the-jak-stat1-and-nox2-p47-phox-pathways
#5
Shimei Qi, Zunyong Feng, Qiang Li, Zhilin Qi, Yao Zhang
Myricitrin, a naturally occurring polyphenol hydroxy flavonoid, has been reported to possess anti-inflammatory properties. However, the precise molecular mechanism of myricitrin's effects on LPS-induced inflammation is unclear. In the present study, myricitrin significantly alleviated acute lung injury in mice. Myricitrin also markedly suppressed the production of NO, TNF-α, IL-6, and MCP-1 in RAW264.7 macrophage cells. The inhibition of NO was concomitant with a decrease in the protein and mRNA levels of iNOS...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28740353/anti-apoptotic-effect-of-banhasasim-tang-on-chronic-acid-reflux-esophagitis
#6
Mi-Rae Shin, Hyo-Jin An, Bu-Il Seo, Seong-Soo Roh
AIM: To evaluate the anti-apoptotic effect of banhasasim-tang (BHSST) on chronic acid reflux esophagitis (CARE) using a rat model. METHODS: A surgically-induced CARE model was established in Sprague-Dawley rats. The modeled rats were divided into a treatment group or untreated group, and given BHSST (1 g/kg body weight per day) or water, respectively, for 15 consecutive days (n = 7 each group). Changes in expression of proteins related to nicotinamide adenine dinucleotide phosphate (NADPH) oxidase and apoptosis were assessed by western blotting...
July 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28733146/resveratrol-efficiently-improves-pulmonary-function-via-stabilizing-mast-cells-in-a-rat-intestinal-injury-model
#7
Xiaolei Huang, Weicheng Zhao, Dan Hu, Xue Han, Hanbin Wang, Jianyu Yang, Yang Xu, Yuantao Li, Weifeng Yao, Chaojin Chen
BACKGROUND: Intestinal ischemia/reperfusion (IIR) leads to acute lung injury (ALI) distally by aggravating pulmonary oxidative stress. Resveratrol is effective in attenuating ALI through its antioxidant capacity. This study aimed to determine the effects of resveratrol on IIR-induced ALI and to explore the role of mast cells (MCs) activation in a rat model of IIR. METHODS: Adult Sprague-Dawley rats were subjected to IIR by occluding the superior mesenteric artery for 60min followed by 4-hour reperfusion...
July 18, 2017: Life Sciences
https://www.readbyqxmd.com/read/28729672/plasmodium-berghei-p47-is-essential-for-ookinete-protection-from-the-anopheles-gambiae-complement-like-response
#8
Chiamaka Valerie Ukegbu, Maria Giorgalli, Hassan Yassine, Jose Luis Ramirez, Chrysanthi Taxiarchi, Carolina Barillas-Mury, George K Christophides, Dina Vlachou
Malaria is a mosquito-borne disease affecting millions of people every year. The rodent parasite Plasmodium berghei has served as a model for human malaria transmission studies and played a pivotal role in dissecting the mosquito immune response against infection. The 6-cysteine protein P47, known to be important for P. berghei female gamete fertility, is shown to serve a different function in Plasmodium falciparum, protecting ookinetes from the mosquito immune response. Here, we investigate the function of P...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719308/a-recombinant-47-kda-outer-membrane-protein-induces-an-immune-response-against-orientia-tsutsugamushi-strain-boryong
#9
Sangho Choi, Hang Jin Jeong, Kyu-Jam Hwang, Byoungchul Gill, Young Ran Ju, Yeong Seon Lee, Jeongmin Lee
We investigated the 47-kDa outer membrane protein (OMP), which is a periplasmic serine protease and an antigenic major surface protein of Orientia tsutsugamushi, as a vaccine candidate. We developed a conventional subunit vaccine expressing recombinant 47-kDa OMP (rec47) and a DNA vaccine (p47). In mouse immunization experiments, intranasal immunization with rec47 alone or with rec47 plus heat-labile enterotoxin B subunit from Escherichia coli or plus cholera toxin (CT) as adjuvants induced a higher amount of rec47-specific antibodies than intramuscular immunization with p47 alone or with p47 plus pBOOST2-samIRF7/3 (pB) as adjuvant...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28713487/moringa-oleifera-seeds-attenuate-vascular-oxidative-and-nitrosative-stresses-in-spontaneously-hypertensive-rats
#10
Joseph Iharinjaka Randriamboavonjy, Marc Rio, Pierre Pacaud, Gervaise Loirand, Angela Tesse
Moringa oleifera (MOI) is a tree currently used in traditional medicine in tropical Africa, America, and Asia for therapeutic applications in several disorders including arterial hypertension. We previously described a cardiac protective role of a treatment with MOI seeds in spontaneously hypertensive rats (SHR). Here, we investigated the effects of this treatment on oxidative and nitrosative vascular stresses in SHR, with normotensive Wistar Kyoto rats used as controls. Oxidative and nitrosative stresses detected in SHR aortas using the fluorescent dye dihydroethidine and protein nitrotyrosine staining were reduced in MOI-treated SHR aortas...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28659754/nadph-oxidase-isoform-2-nox2-is-involved-in-drug-addiction-vulnerability-in-progeny-developmentally-exposed-to-ethanol
#11
Marcela L Contreras, Erwin de la Fuente-Ortega, Sofía Vargas-Roberts, Daniela C Muñoz, Carolina A Goic, Paola A Haeger
Ethanol exposure increases oxidative stress in developing organs, including the brain. Antioxidant treatment during maternal ethanol ingestion improves behavioral deficits in rodent models of fetal alcohol spectrum disorder (FASD). However, the impact of general antioxidant treatment in their adult offspring and the Specific Reactive Species (ROS)-dependent mechanism, are not fully understood. We hypothesized that pre and early postnatal ethanol exposure (PEE) modifies redox homeostasis, in particular NOX2 function during reward signaling in the mesocorticolimbic pathway, which reinforces the effects of alcohol...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28638979/endocytosis-is-required-for-exocytosis-and-priming-of-respiratory-burst-activity-in-human-neutrophils
#12
T Michael Creed, Shweta Tandon, Richard A Ward, Kenneth R McLeish
OBJECTIVE AND DESIGN: Neutrophil generation of reactive oxygen species (ROS) is enhanced by exposure to pro-inflammatory agents in a process termed priming. Priming is depending on exocytosis of neutrophil granules and p47(phox) phosphorylation-dependent translocation of cytosolic NADPH oxidase components. Clathrin-mediated endocytosis was recently reported to be necessary for priming, but the mechanism linking endocytosis to priming was not identified. The present study examined the hypothesis that endocytosis regulates neutrophil priming by controlling granule exocytosis...
June 21, 2017: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/28630004/co-releasing-molecules-2-attenuates-ox-ldl-induced-injury-in-huvecs-by-ameliorating-mitochondrial-function-and-inhibiting-wnt-%C3%AE-catenin-pathway
#13
Hai-Jian Sun, Dong-Yan Xu, Yi-Xin Sun, Tong Xue, Chen-Xing Zhang, Zhi-Xuan Zhang, Wei Lin, Ke-Xue Li
Oxidized low-density lipoprotein (ox-LDL) is well known to disrupt normal functionality of endothelium, which plays a prominent role in endothelial dysfunction in many cardiovascular diseases. CO-releasing molecule 2 (CORM-2) is a promising candidate for treatment of cardiovascular diseases. However, it has not been defined whether CORM-2 might improve endothelial injury induced by ox-LDL. The present study was undertaken to determine the regulatory role of CORM-2 in cell injury of ox-LDL-treated human umbilical vein endothelial cells (HUVECs)...
August 26, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28601846/nadph-oxidase-depletion-in-neutrophils-from-patients-with-cirrhosis-and-restoration-via-toll-like-receptor-7-8-activation
#14
Loïc Rolas, Abdelali Boussif, Emmanuel Weiss, Philippe Lettéron, Oualid Haddad, Jamel El-Benna, Pierre-Emmanuel Rautou, Richard Moreau, Axel Périanin
OBJECTIVE: Cirrhosis downregulates phagocyte oxidant production via their antibacterial superoxide-generating system, NADPH oxidase (NOX2) and increases patients' susceptibility to infection and mortality rate. To explore novel biochemical parameters that explain susceptibility to infections, we investigated the expression of NOX2 and partners in neutrophils of patients with severe alcoholic cirrhosis and have provided a novel approach to restore superoxide production capacity in patients' neutrophils and blood...
June 10, 2017: Gut
https://www.readbyqxmd.com/read/28600985/nox2-contributes-to-hyperinsulinemia-induced-redox-imbalance-and-impaired-vascular-function
#15
Abeer M Mahmoud, Mohamed M Ali, Edwin R Miranda, Jacob T Mey, Brian K Blackburn, Jacob M Haus, Shane A Phillips
Insulin resistance promotes vascular endothelial dysfunction and subsequent development of cardiovascular disease. Previously we found that skeletal muscle arteriolar flow-induced dilation (FID) was reduced following a hyperinsulinemic clamp in healthy adults. Therefore, we hypothesized that hyperinsulinemia, a hallmark of insulin resistance, contributes to microvascular endothelial cell dysfunction via inducing oxidative stress that is mediated by NADPH oxidase (Nox) system. We examined the effect of insulin, at levels that are comparable with human hyperinsulinemia on 1) FID of isolated arterioles from human skeletal muscle tissue in the presence and absence of Nox inhibitors and 2) human adipose microvascular endothelial cell (HAMECs) expression of nitric oxide (NO), endothelial NO synthase (eNOS), and Nox-mediated oxidative stress...
June 3, 2017: Redox Biology
https://www.readbyqxmd.com/read/28573047/simultaneous-fluorescein-angiography-and-spectral-domain-optical-coherence-tomography-correlate-retinal-thickness-changes-to-vascular-abnormalities-in-an-in-vivo-mouse-model-of-retinopathy-of-prematurity
#16
Olachi J Mezu-Ndubuisi, Lauren K Taylor, Jamee A Schoephoerster
BACKGROUND: Retinopathy of prematurity (ROP) is a condition of abnormal retinal vascular development (RVD) in premature infants. Fluorescein angiography (FA) has depicted phases (early, mid, late, and mature) of RVD in oxygen-induced retinopathy (OIR) mice. We sought to establish the relationship between retinal structural and vascular changes using simultaneous FA and spectral domain optical coherence tomography (SD-OCT). METHOD: 63 mice were exposed to 77% oxygen at postnatal day 7 (P7) for 5 days, while 63 mice remained in room air (RA)...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28545352/cytoskeleton-anchoring-of-conformational-mutant-like-p53-but-not-shorter-isoforms-p53%C3%AE-and-p47-%C3%AE-n40p53-in-senescent-human-fibroblasts
#17
Koji Nishio
BACKGROUND: Cytoskeleton anchoring of conformational mutant-like p53 is prominent in human senescent cell. The present research investigated the structural basis of vimentin cytoskeleton-anchoring of human p53. METHOD: GFP-fused wild type p53, mutant p53, those of the various truncated isoforms including p53β and p47, were expressed in the vimentin-expressing cells: mouse fibroblasts, COS-7 cells, young and senescent human fibroblasts, and HeLa cells (non-vimentin-expressing)...
May 23, 2017: Current Aging Science
https://www.readbyqxmd.com/read/28515091/angiotensin-converting-enzyme-enhances-the-oxidative-response-and-bactericidal-activity-of-neutrophils
#18
Zakir Khan, Xiao Z Shen, Ellen A Bernstein, Jorge F Giani, Masahiro Eriguchi, Tuantuan V Zhao, Romer A Gonzalez-Villalobos, Sebastien Fuchs, George Y Liu, Kenneth E Bernstein
Angiotensin-converting enzyme (ACE) inhibitors are widely used to reduce blood pressure. Here, we examined if an ACE is important for the antibacterial effectiveness of neutrophils. ACE knockout mice or mice treated with an ACE inhibitor were more susceptible to bacterial infection by methicillin-resistant Staphylococcus aureus (MRSA). In contrast, mice overexpressing ACE in neutrophils (Neu(ACE) mice) have increased resistance to MRSA and better in vitro killing of MRSA, Pseudomonas aeruginosa, and Klebsiella pneumoniae ACE overexpression increased neutrophil production of reactive oxygen species (ROS) following MRSA challenge, an effect independent of the angiotensin II AT1 receptor...
July 20, 2017: Blood
https://www.readbyqxmd.com/read/28476935/a-schistosoma-japonicum-infection-promotes-the-expansion-of-myeloid-derived-suppressor-cells-by-activating-the-jak-stat3-pathway
#19
Quan Yang, Huaina Qiu, Hongyan Xie, Yanwei Qi, Hefei Cha, Jiale Qu, Mei Wang, Yuanfa Feng, Xin Ye, Jianbing Mu, Jun Huang
Myeloid-derived suppressor cells (MDSCs), a heterogeneous group of immune cells from the myeloid lineage, play an important part in suppression of host immune responses during many pathologic conditions, including cancer and infectious diseases. Thus, understanding the functional diversity of these cells as well as the underlying mechanisms is crucial for the development of disease control strategies. The role of MDSCs during Schistosoma japonicum infection, however, is not clear, and there is a lack of systematic study so far...
June 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28473742/nadph-oxidase-activation-contributes-to-heavy-ion-irradiation-induced-cell-death
#20
Yupei Wang, Qing Liu, Weiping Zhao, Xin Zhou, Guoying Miao, Chao Sun, Hong Zhang
Increased oxidative stress plays an important role in heavy ion radiation-induced cell death. The mechanism involved in the generation of elevated reactive oxygen species (ROS) is not fully illustrated. Here we show that NADPH oxidase activation is closely related to heavy ion radiation-induced cell death via excessive ROS generation. Cell death and cellular ROS can be greatly reduced in irradiated cancer cells with the preincubation of diphenyleneiodium, an inhibitor of NADPH oxidase. Most of the NADPH oxidase (NOX) family proteins (NOX1, NOX2, NOX3, NOX4, and NOX5) showed increased expression after heavy ion irradiation...
January 2017: Dose-response: a Publication of International Hormesis Society
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