keyword
MENU ▼
Read by QxMD icon Read
search

Transient global

keyword
https://www.readbyqxmd.com/read/28731692/quinolinyl-nitrone-rp19-induces-neuroprotection-after-transient-brain-ischemia
#1
Maria Irene Ayuso, Emma Martinez-Alonso, Mourad Chioua, Alejandro Escobar-Peso, Rafael Gonzalo-Gobernado, Joan Montaner, José Marco-Contelles, Alberto Alcazar
There is a need to develop additional effective therapies for ischemic stroke. Nitrones, which were first developed as reactive oxygen species (ROS)-trapping compounds, have been proposed as neuroprotective agents for ischemic stroke, a ROS-related disorder. The previous reported ROS-trapping compound, quinolyl nitrone RP19, is here being assayed to induce neuroprotection to ischemia-reperfusion injury in three experimental ischemia models: (i), oxygen-glucose deprivation (OGD) on primary neuronal cultures; (ii), transient global cerebral ischemia in four-vessel occlusion model; and (iii), transient focal cerebral ischemia in middle cerebral artery occlusion (tMCAO) model...
July 21, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28729914/effects-of-mtor-on-neurological-deficits-after-transient-global-ischemia
#2
Jihong Xing, Jian Lu
Mammalian target of rapamycin (mTOR) is a serine/threonine protein kinase and activation of its signal pathway plays an important role in regulating protein growth and synthesis as well as cell proliferation and survival. In the present study, we examined the contribution of mTOR and its downstream products to brain injuries and neurological deficiencies after cardiac arrest (CA) induced-transient global ischemia. CA was induced by asphyxia followed by cardiopulmonary resuscitation (CPR) in rats. Our results showed that expression of p-mTOR, mTOR-mediated phosphorylation of 4E-binding protein 4 (4E-BP1) and p70 ribosomal S6 protein kinase 1 (S6K1) pathways were amplified in CA rats compared to their controls...
2017: Translational Neuroscience
https://www.readbyqxmd.com/read/28726875/time-resolved-spectroscopic-analysis-of-the-light-energy-harvesting-mechanism-in-carbazole-dendrimers-with-a-blue-phosphorescent-ir-complex-core
#3
Yang-Jin Cho, So-Yoen Kim, Mi Rang Son, Ho-Jin Son, Dae Won Cho, Sang Ook Kang
In order to investigate the light-energy harvesting mechanism, a series of dendrimers with a heteroleptic iridium(iii) complex core, [Ir(dmb)2(pic-Czn)] (Gn: n = 1, 2, and 3), with 2,6-difluoro-3-(4-methylpyridin-2-yl)benzonitrile (dmb) as the cyclometallating ligand and 3-hydroxypicolinate (pic) as the ancillary ligand, connected to carbazole-based dendrons (Czn: n = 2, 4, and 8) was synthesized. The Ir centred complex [Ir(dmb)2(pic-OCH3), G0] shows a blue emission at <500 nm, which is assigned to metal-to-ligand charge-transfer ((3)MLCT) phosphorescence...
July 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28726776/autophagosome-maturation-mediated-by-rab7-contributes-to-neuroprotection-of-hypoxic-preconditioning-against-global-cerebral-ischemia-in-rats
#4
Lixuan Zhan, Siyuan Chen, Kongping Li, Donghai Liang, Xinyong Zhu, Liu Liu, Zhiwei Lu, Weiwen Sun, En Xu
Autophagy disruption leads to neuronal damage in hypoxic-ischemic brain injury. Rab7, a member of the Rab GTPase superfamily, has a unique role in the regulation of autophagy. Hypoxic preconditioning (HPC) provides neuroprotection against transient global cerebral ischemia (tGCI). However, the underlying mechanisms remain poorly understood. Thus, the current study explored the potential molecular mechanism of the neuroprotective effect of HPC by investigating how Rab7 mediates autophagosome (AP) maturation after tGCI in adult rats...
July 20, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28726351/correction-of-horizontal-neck-lines-our-preliminary-experience-with-hyaluronic-acid-fillers
#5
Soo-Keun Lee, Hei Sung Kim
BACKGROUND: There is an increasing trend shifting the esthetic focus downward from the face with a significant number of new treatments aimed at the aging neck. Hyaluronic acid (HA) filler injection is widely performed into the horizontal neck lines in Korea, but there are few reports assessing its effectiveness. OBJECTIVE: We aimed to evaluate the efficacy and safety of HA filler injection in the treatment of horizontal neck lines. PATIENTS AND METHODS: A retrospective chart review was performed on cases of horizontal neck lines treated with HA fillers...
July 20, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28721029/the-impact-of-transient-and-persistent-acute-kidney-injury-on-short-term-outcomes-in-very-elderly-patients
#6
Qinglin Li, Meng Zhao, Xiaodan Wang
OBJECTIVES: Acute kidney injury (AKI) is a common complication in elderly patients and is associated with poor outcomes. However, the effect of transient and persistent geriatric AKI on short-term mortality is unclear. We aimed to study the incidence, clinical characteristics, and prognostic impact of transient and persistent AKI in such patients. METHODS: We retrospectively enrolled very elderly patients (≥75 years) from the geriatric department of the Chinese PLA General Hospital between 2007 and 2015...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28720578/systematic-longitudinal-survey-of-invasive-escherichia-coli-in-england-demonstrates-a-stable-population-structure-only-transiently-disturbed-by-the-emergence-of-st131
#7
Teemu Kallonen, Hayley J Brodrick, Simon R Harris, Jukka Corander, Nicholas M Brown, Veronique Martin, Sharon J Peacock, Julian Parkhill
Escherichia coli associated with urinary tract infections and bacteremia has been intensively investigated, including recent work focusing on the virulent, globally disseminated, multidrug-resistant lineage ST131. To contextualize ST131 within the broader E. coli population associated with disease, we used genomics to analyze a systematic 11-yr hospital-based survey of E. coli associated with bacteremia using isolates collected from across England by the British Society for Antimicrobial Chemotherapy and from the Cambridge University Hospitals NHS Foundation Trust...
July 18, 2017: Genome Research
https://www.readbyqxmd.com/read/28715440/transcriptional-profiling-of-the-rat-nucleus-accumbens-after-modest-or-high-alcohol-exposure
#8
Julia Morud, Arghavan Ashouri, Erik Larsson, Mia Ericson, Bo Söderpalm
Alcohol use disorder is a chronic relapsing brain disorder and a global health issue. Prolonged high alcohol consumption increases the risk for dependence development, a complex state that includes progressive alterations in brain function. The molecular mechanisms behind these changes remain to be fully disclosed, but several genes show altered expression in various regions of the rat brain even after modest alcohol exposure. The present study utilizes whole-transcriptome sequencing (RNA-seq) to investigate expression changes in the brain nucleus accumbens (NAc), an area of particular interest in addictive disorders, of alcohol consuming rats...
2017: PloS One
https://www.readbyqxmd.com/read/28714672/chemical-denaturants-smoothen-ruggedness-on-the-free-energy-landscape-of-protein-folding
#9
Pooja Malhotra, Prashant Navalbhai Jethva, Jayant B Udgaonkar
To characterize experimentally the ruggedness of the free energy landscape of protein folding is challenging, because the distributed small free energy barriers are usually dominated by one or a few, large activation free energy barriers. The present study delineates changes in the roughness of the free energy landscape by making use of the observation that a decrease in ruggedness is accompanied invariably by an increase in folding cooperativity. Hydrogen exchange coupled to mass spectrometry (HX-MS) was used to detect transient sampling of local energy minima and the global unfolded state on the free energy landscape of the small protein, single chain monellin...
July 17, 2017: Biochemistry
https://www.readbyqxmd.com/read/28713087/clinical-factors-related-to-post-stroke-fatigue-within-the-first-3-month-after-acute-cerebrovascular-events
#10
Iryna I Delva, Mykhaylo Y Delva, Volodymyr A Poltorapavlov
INTRODUCTION: Post-stroke fatigue (PSF) is a common stroke complication with long-term negative consequences. AIM: Assess the rates of certain PSF domains within first 3 months after different acute cerebrovascular events (ACE) and identify clinical factors associated with each PSF domain. MATERIAL AND METHODS: There were examined 285 patients (195 with ischemic strokes, 39 with hemorrhagic strokes and 51 with transient ischemic attacks (TIA)) consequently at hospital stay, in 1 month and in 3 months after ACE...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28711656/upregulation-of-cdh1-signaling-in-the-hippocampus-attenuates-brain-damage-after-transient-global-cerebral-ischemia-in-rats
#11
Bo Zhang, Kai Wei, Xuan Li, Rong Hu, Jin Qiu, Yue Zhang, Wenlong Yao, Chuanhan Zhang, Chang Zhu
Cerebral ischemia is a major cause of brain dysfunction. The E3 ubiquitin ligase anaphase-promoting complex and its coactivator Cdh1 have been reported to be involved in the regulation of neuronal survival, differentiation, axonal growth and synaptic development in the central nervous system. However, its role in the ischemic brain and the underlying mechanisms remain poorly understood. The present study aimed to investigate the effects of Cdh1 overexpression on the ischemic rat brain by direct intra-hippocampal injection of lentivirus-delivered Cdh1 before transient global cerebral ischemia reperfusion...
July 12, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28710796/plant-produced-zika-virus-envelope-protein-elicits-neutralizing-immune-responses-that-correlate-with-protective-immunity-against-zika-virus-in-mice
#12
Ming Yang, Haiyan Sun, Huafang Lai, Jonathan Hurtado, Qiang Chen
The global Zika virus (ZIKV) outbreak and its link to fetal and newborn microcephaly and severe neurological complications in adults call for the urgent development of ZIKV vaccines. In response, we developed a subunit vaccine based on the ZIKV envelope (E) protein and investigated its immunogenicity in mice. Transient expression of ZIKV E (zE) resulted in its rapid accumulation in leaves of Nicotiana benthamiana plants. Biochemical analysis revealed that plant-produced ZIKV E (PzE) exhibited specific binding to a panel of monoclonal antibodies that recognize various zE conformational epitopes...
July 15, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28710234/takotsubo-cardiomyopathy-and-transient-global-amnesia-a-shared-aetiology
#13
Jithin Sajeev, Anoop Koshy, Kevin Rajakariar, Gary Gordon
Takotsubo cardiomyopathy (TTC) is associated with acute, reversible left ventricular (LV) dysfunction, while transient global amnesia (TGA) is a reversible disorder of the brain characterised by anterograde amnesia. We report an unusual case of TTC occurring concurrently in a patient with TGA, and propose that catecholamine surge induced cerebral venous congestion and cardiotoxicity is the shared aetiology that leads to the concurrent manifestation of these conditions. TTC and TGA are reversible disorders that can occur concurrently in a subset of patients due to a unifying aetiology, catecholamine excess, leading to pathophysiological changes within the brain and the myocardium...
July 14, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28701483/the-shigella-type-iii-effector-ipgd-recodes-ca-2-signals-during-invasion-of-epithelial-cells
#14
Chun Hui Sun, Benjamin Wacquier, Daniel I Aguilar, Nathalie Carayol, Kevin Denis, Sylviane Boucherie, Cesar Valencia-Gallardo, Ceren Simsek, Christophe Erneux, Alexandre Lehman, Jost Enninga, Laurence Arbibe, Philippe Sansonetti, Geneviève Dupont, Laurent Combettes, Guy Tran Van Nhieu
The role of second messengers in the diversion of cellular processes by pathogens remains poorly studied despite their importance. Among these, Ca(2+) virtually regulates all known cell processes, including cytoskeletal reorganization, inflammation, or cell death pathways. Under physiological conditions, cytosolic Ca(2+) increases are transient and oscillatory, defining the so-called Ca(2+) code that links cell responses to specific Ca(2+) oscillatory patterns. During cell invasion, Shigella induces atypical local and global Ca(2+) signals...
July 12, 2017: EMBO Journal
https://www.readbyqxmd.com/read/28698332/development-in-the-number-of-clinical-trial-applications-in-western-europe-from-2007-to-2015-retrospective-study-of-data-from-national-competent-authorities
#15
Tilde Dombernowsky, Merete Hædersdal, Ulrik Lassen, Simon Francis Thomsen
OBJECTIVE: To investigate the development in the number of applications for authorisation of clinical trials of medicines (CTAs) submitted annually to national competent authorities in 10 Western European member states of the European Union from 2007 to 2015. DESIGN: Registry study. SETTING: Data from national competent authorities. PARTICIPANTS: Germany, Italy, Spain, France, the UK, Belgium, the Netherlands, Austria, Denmark and Sweden...
July 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/28698279/zika-virus-persistently-infects-and-is-basolaterally-released-from-primary-human-brain-microvascular-endothelial-cells
#16
Megan C Mladinich, John Schwedes, Erich R Mackow
Zika virus (ZIKV) is a mosquito-borne Flavivirus that has emerged as the cause of encephalitis and fetal microencephaly in the Americas. ZIKV uniquely persists in human bodily fluids for up to 6 months, is sexually transmitted, and traverses the placenta and the blood-brain barrier (BBB) to damage neurons. Cells that support persistent ZIKV replication and mechanisms by which ZIKV establishes persistence remain enigmatic but central to ZIKV entry into protected neuronal compartments. The endothelial cell (EC) lining of capillaries normally constrains transplacental transmission and forms the BBB, which selectively restricts access of blood constituents to neurons...
July 11, 2017: MBio
https://www.readbyqxmd.com/read/28696257/transient-and-dynamic-dna-supercoiling-potently-stimulates-the-leu-500-promoter-in-escherichia-coli
#17
Xiaoduo Zhi, Samantha Dages, Kelley Dages, Yingting Liu, Zi-Chun Hua, John Makemson, Fenfei Leng
The inactive prokaryotic leu-500 promoter (Pleu-500) contains a single A-to-G point mutation in the -10 region of the leucine operon promoter, which causes leucine auxotrophy. This promoter can be activated by (-) DNA supercoiling in Escherichia coli topA strains. However, whether this activation arises from global, permanent or transient, dynamic supercoiling is still not fully understood. In this article, using a newly established in vivo system carrying a pair of divergently coupled promoters, i.e., an IPTG-inducible promoter and Pleu-500 that control the expression of lacZ and luc (the firefly luciferase gene) respectively, we demonstrate that transient, dynamic (-) DNA supercoiling provided by divergent transcription in both wild-type and topA strains can potently activate Pleu-500...
July 10, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28690765/novel-therapeutic-effects-of-leonurine-on-ischemic-stroke-new-mechanisms-of-bbb-integrity
#18
Qiu-Yan Zhang, Zhi-Jun Wang, De-Miao Sun, Ying Wang, Peng Xu, Wei-Jun Wu, Xin-Hua Liu, Yi-Zhun Zhu
Stroke is a leading cause of morbidity and mortality globally. Leonurine (also named SCM-198), a compound extracted from Herba leonuri, was effective on the prevention of various cardiovascular and brain diseases. The purpose of this study was to explore the possible therapeutic potential of SCM-198 against ischemia reperfusion injury and underlying mechanisms. In the in vivo transient middle cerebral artery occlusion (tMCAO) rat model, we found that treatment with SCM-198 could decrease infarct volume and improve neurological deficit by protecting against blood-brain barrier (BBB) breakdown...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28686620/structural-transitions-during-large-ribosomal-subunit-maturation-analyzed-by-tethered-nuclease-structure-probing-in-s-cerevisiae
#19
Gisela Pöll, Christian Müller, Malena Bodden, Fabian Teubl, Norbert Eichner, Gerhard Lehmann, Joachim Griesenbeck, Herbert Tschochner, Philipp Milkereit
Yeast large ribosomal subunit (LSU) precursors are subject to substantial changes in protein composition during their maturation due to coordinated transient interactions with a large number of ribosome biogenesis factors and due to the assembly of ribosomal proteins. These compositional changes go along with stepwise processing of LSU rRNA precursors and with specific rRNA folding events, as revealed by recent cryo-electron microscopy analyses of late nuclear and cytoplasmic LSU precursors. Here we aimed to analyze changes in the spatial rRNA surrounding of selected ribosomal proteins during yeast LSU maturation...
2017: PloS One
https://www.readbyqxmd.com/read/28683776/trpa1-channels-promote-astrocytic-ca-2-hyperactivity-and-synaptic-dysfunction-mediated-by-oligomeric-forms-of-amyloid-%C3%AE-peptide
#20
Anthony Bosson, Adrien Paumier, Sylvie Boisseau, Muriel Jacquier-Sarlin, Alain Buisson, Mireille Albrieux
BACKGROUND: Excessive synaptic loss is thought to be one of the earliest events in Alzheimer's disease (AD). However, the key mechanisms that maintain plasticity of synapses during adulthood or initiate synapse dysfunction in AD remain unknown. Recent studies suggest that astrocytes contribute to functional changes observed during synaptic plasticity and play a major role in synaptic dysfunction but astrocytes behavior and involvement in early phases of AD remained largely undefined. METHODS: We measure astrocytic calcium activity in mouse CA1 hippocampus stratum radiatum in both the global astrocytic population and at a single cell level, focusing in the highly compartmentalized astrocytic arbor...
July 6, 2017: Molecular Neurodegeneration
keyword
keyword
34334
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"