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https://www.readbyqxmd.com/read/29926068/-involvement-of-interaction-between-trpc1-and-orai1-in-calcium-sensing-receptor-mediated-calcium-influx-and-nitric-oxide-generation-in-human-umbilical-vein-endothelial-cells
#1
La-Mei Wang, Na Tang, Hua Zhong, Li-Juan Pang, Chun-Jun Zhang, Fang He
The present study was to investigate the role of the interaction between canonical transient receptor potential channel 1 (TRPC1) and calcium release-activated calcium modulator 1 (Orai1) in extracellular Ca2+ -sensing receptor (CaR)-induced extracellular Ca2+ influx and nitric oxide (NO) production. Human umbilical vein endothelial cells (HUVECs) were incubated with CaR agonist Spermine [activating store-operated calcium channels (SOC) and receptor-operated calcium channels (ROC)] alone or in combination with the following reagents: CaR negative allosteric modulator Calhex231 plus ROC analogue TPA (activating ROC and blocking SOC), Ro31-8220 (PKC inhibitor that activates SOC and blocks ROC) or Go6967 (PKCs and PKCµ inhibitor that activates SOC and blocks ROC)...
June 25, 2018: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/29923144/%C3%AE-catenin-gene-promoter-hypermethylation-by-reactive-oxygen-species-correlates-with-the-migratory-and-invasive-potentials-of-colon-cancer-cells
#2
Suhrid Banskota, Sadan Dahal, Eunju Kwon, Dong Young Kim, Jung-Ae Kim
PURPOSE: Over half of the colon cancer patients suffer from cancer-related events, mainly metastasis. Loss of β-catenin activity has previously been found to facilitate cancer cell dissociation and migration. Here, we aimed to investigate whether epigenetic silencing of β-catenin induces human colon cancer cell migration and/or invasion. METHODS: HCT-116, Caco-2, HT-29 and SW620 cell migration and invasion capacities were assessed using scratch wound healing and Matrigel invasion assays, respectively...
June 19, 2018: Cellular Oncology (Dordrecht)
https://www.readbyqxmd.com/read/29922719/elastic-properties-of-2d-ti-3-c-2-t-x-mxene-monolayers-and-bilayers
#3
Alexey Lipatov, Haidong Lu, Mohamed Alhabeb, Babak Anasori, Alexei Gruverman, Yury Gogotsi, Alexander Sinitskii
Two-dimensional (2D) transition metal carbides and nitrides, known as MXenes, are a large class of materials that are finding numerous applications ranging from energy storage and electromagnetic interference shielding to water purification and antibacterial coatings. Yet, despite the fact that more than 20 different MXenes have been synthesized, the mechanical properties of a MXene monolayer have not been experimentally studied. We measured the elastic properties of monolayers and bilayers of the most important MXene material to date, Ti3 C2 T x (T x stands for surface termination)...
June 2018: Science Advances
https://www.readbyqxmd.com/read/29921716/acute-complement-inhibition-potentiates-neurorehabilitation-and-enhances-tpa-mediated-neuroprotection
#4
Ali Alawieh, Meredith Andersen, DeAnna L Adkins, Stephen Tomlinson
Since complement activation in the subacute or chronic phase after stroke was recently shown to stimulate neural plasticity, we investigated how complement activation and complement inhibition in the acute phase after murine stroke interacts with subsequent rehabilitation therapy to modulate neuroinflammation and neural remodeling. We additionally investigated how complement and complement inhibition interacts with tissue plasminogen activator (tPA), the other standard of care therapy for stroke, and an FDA preclinical requirement for translation of an experimental stroke therapy...
June 19, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29916009/lack-of-durable-protection-against-cotton-smoke-induced-acute-lung-injury-in-sheep-by-nebulized-single-chain-urokinase-plasminogen-activator-or-tissue-plasminogen-activator
#5
Satoshi Fukuda, Perenlei Enkhbaatar, Christina Nelson, Robert A Cox, Marla R Wolfson, Thomas H Shaffer, Robert O Williams, Soraya Hengsawas Surasarang, Sahakijpijarn Sawittree, Galina Florova, Andrey A Komissarov, Kathleen Koenig, Krishna Sarva, Harrison T Ndetan, Karan P Singh, Steven Idell
BACKGROUND: Airway fibrin casts are clinically important complications of severe inhalational smoke-induced acute lung injury (ISIALI) for which reliable evidence-based therapy is lacking. Nebulized anticoagulants or a tissue plasminogen activator; tPA, has been advocated, but airway bleeding is a known and lethal potential complication. We posited that nebulized delivery of single chain urokinase plasminogen activator, scuPA, is well-tolerated and improves physiologic outcomes in ISIALI...
June 18, 2018: Clinical and Translational Medicine
https://www.readbyqxmd.com/read/29915125/beyond-large-vessel-occlusion-strokes-distal-occlusion-thrombectomy
#6
Jonathan A Grossberg, Leticia C Rebello, Diogo C Haussen, Mehdi Bouslama, Meredith Bowen, Clara M Barreira, Samir R Belagaje, Michael R Frankel, Raul G Nogueira
BACKGROUND AND PURPOSE: Endovascular therapy is the standard of care for the treatment of proximal large vessel occlusion strokes. Its safety and efficacy in the treatment of distal intracranial occlusions has not been well studied. METHODS: The data that support the findings of this study are available from the corresponding author on reasonable request. Retrospective review of a prospectively collected endovascular database (2010-2015, n=949) for all patients with distal intracranial occlusions treated endovascularly...
June 18, 2018: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29914038/a-small-molecule-inhibitor-of-plasminogen-activator-inhibitor-1-reduces-brain-amyloid-%C3%AE-load-and-improves-memory-in-an-animal-model-of-alzheimer-s-disease
#7
Hasina Akhter, Wen-Tan Huang, Thomas van Groen, Hui-Chien Kuo, Toshio Miyata, Rui-Ming Liu
Alzheimer's disease (AD) is a major cause of dementia in the elderly with no effective treatment. Accumulation of amyloid-β peptide (Aβ) in the brain is a pathological hallmark of AD and is believed to be a central disease-causing and disease-promoting event. In a previous study, we showed that deletion of plasminogen activator inhibitor 1 (PAI-1), a primary inhibitor of tissue type and urokinase type plasminogen activators (tPA and uPA), significantly reduced brain Aβ load in APP/PS1 mice, an animal model of familial AD...
June 9, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29913299/pharmacological-and-toxicological-study-of-a-chemical-standardized-ethanol-extract-of-the-branches-and-leaves-from-eysenhardtia-polystachya-ortega-sarg-fabaceae
#8
Angel Josabad Alonso-Castro, Juan Ramón Zapata-Morales, Victor Arana-Argáez, Julio Cesar Torres-Romero, Eyra Ramírez-Villanueva, Sabino Eduardo Pérez-Medina, Marco Antonio Ramírez-Morales, Mario Alberto Juárez-Méndez, Yessica Paola Infante-Barrios, Fidel Martínez-Gutiérrez, Candy Carranza-Álvarez, Mario Alberto Isiordia-Espinoza, Andrés Flores-Santos
Eysenhardtia polystachya is used for the empirical treatment of cancer, infections, diarrhea, inflammation, and pain. This study identified, using GC-MS, the main chemical components in an ethanol extract of E. polystachya branches and leaves (EPE) and tested its cytotoxic, antimicrobial, anti-diarrheal, anti-inflammatory, and antinociceptive effects. The in vitro and in vivo toxicity of EPE was evaluated using the comet assay in human peripheral blood mononuclear cells (PBMC) and the acute toxicity test in mice, respectively...
June 15, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29909558/blood-brain-barrier-permeability-assessed-by-perfusion-computed-tomography-predicts-hemorrhagic-transformation-in-acute-reperfusion-therapy
#9
Taewon Kim, Jaseong Koo, Seong-Hoon Kim, In-Uk Song, Sung-Woo Chung, Kwang-Soo Lee
Hemorrhagic transformation (HT) is one of the most feared complications of acute recanalization therapies. The aim of this study was to evaluate whether blood-brain barrier permeability (BBBP) imaging can predict HT in the setting of acute recanalization therapy and to determine the sensitivity and specificity of BBBP for the prediction of HT according to the type of reperfusion therapy. We assessed a total of 46 patients who received recanalization therapy (intravenous (IV) recombinant tissue plasminogen activator (tPA), mechanical thrombectomy with a stent retriever or both) for acute ischemic stroke within the internal carotid artery or middle cerebral artery...
June 16, 2018: Neurological Sciences
https://www.readbyqxmd.com/read/29906845/quantum-molecular-dynamics-of-warm-dense-iron-and-a-five-phase-equation-of-state
#10
Travis Sjostrom, Scott Crockett
Through quantum molecular dynamics (QMD), utilizing both Kohn-Sham (orbital-based) and orbital-free density functional theory, we calculate the equation of state of warm dense iron in the density range 7-30g/cm^{3} and temperatures from 1 to 100 eV. A critical examination of the iron pseudopotential is made, from which we find a significant improvement at high pressure to the previous QMD calculations of Wang et al. [Phys. Rev. E 89, 023101 (2014)10.1103/PhysRevE.89.023101]. Our results also significantly extend the ranges of density and temperature that were attempted in that prior work...
May 2018: Physical Review. E
https://www.readbyqxmd.com/read/29904454/a-rare-case-of-native-mitral-valve-bacillus-cereus-endocarditis-culminating-into-a-cerebrovascular-infarction
#11
Bibai Ren, Glenmore Lasam
We report a case of a 56-year-old man who presented initially with a sudden onset of right-sided facial droop and weakness, aphasia, and confusion with no associated fever, chills, syncope, fatigue, weight loss, night sweats, nausea, vomiting, diarrhea, odontalgia, palpitations, cough, or dyspnea. Code stroke was called and the patient received tissue plasminogen activator (tPA) with subsequent resolution of his symptoms. Cranial magnetic resonance imaging showed left frontal punctate cortical restricted diffusion consistent with subacute to acute infarction...
June 2018: Cardiology Research
https://www.readbyqxmd.com/read/29897064/bimetallic-cooperative-effect-on-o-o-bond-formation-copper-polypyridyl-complexes-as-water-oxidation-catalyst
#12
Xiao-Jun Su, Chu Zheng, Qin-Qin Hu, Hao-Yi Du, Rong-Zhen Liao, Ming-Tian Zhang
The performance of water oxidation catalysis by a Cu-based polypyridyl complex, [CuII(TPA)(OH2)]2+ (1H; TPA = tris-(pyridylmethyl)amine), has been investigated in neutral aqueous solution by electrochemical methods. Compared with our previously reported binuclear catalyst, [(BPMAN)(CuII)2(μ-OH)]3+ (2; BPMAN = 2,7-[bis(2-pyridylmethyl)aminomethyl]-1,8-naphthyridine), mononuclear catalyst 1 has a higher overpotential and lower catalytic activity toward water oxidation under the same conditions. Experimental results revealed that the O-O bond formation occurred via a water nucleophilic attack mechanism in which formal CuIV(O) is proposed as a key intermediate for the mononuclear catalyst 1H...
June 13, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29895321/neural-stem-cell-therapy-for-subacute-and-chronic-ischemic-stroke
#13
REVIEW
Austin C Boese, Quan-Son Eric Le, Dylan Pham, Milton H Hamblin, Jean-Pyo Lee
Neural stem cells (NSCs) play vital roles in brain homeostasis and exhibit a broad repertoire of potentially therapeutic actions following neurovascular injury. One such injury is stroke, a worldwide leading cause of death and disability. Clinically, extensive injury from ischemic stroke results from ischemia-reperfusion (IR), which is accompanied by inflammation, blood-brain barrier (BBB) damage, neural cell death, and extensive tissue loss. Tissue plasminogen activator (tPA) is still the only US Food and Drug Administration-approved clot-lysing agent...
June 13, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29895187/factor-viii-in-acute-cerebral-ischemia-pilot-study-biomarker-in-patients-with-large-vessel-occlusion
#14
Digvijaya Navalkele, Amelia Boehme, Karen Albright, Cindy Leissinger, Laurie Schluter, Melissa Freeman, Stacy Drury, Ramy El Khoury, T Mark Beasley, Sheryl Martin-Schild
We conducted a prospective serial laboratory cohort study to assess the correlation of factor VIII (FVIII) levels in response to thrombolysis in patients with large vessel occlusion (LVO) and acute ischemic stroke (AIS). Patients with AIS with anterior circulation LVO were eligible for enrollment if treated within 4.5 hours from last seen normal with intravenous tissue plasminogen activator (tPA). Patients (n = 29) had a mean age of 71 years and median National Institute of Health Stroke Scale of 14. Baseline pre-tPA FVIII was not significantly correlated with clot burden score (-0...
January 1, 2018: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/29889323/a-switch-from-mechanistic-competition-mediated-by-a-coordination-between-temperature-and-concentration-effects-in-the-oxidation-reaction-of-feii-n4py-tpa-otf-2
#15
Ping-Yu Chen, Tzu-Hsien Tseng
The formation of [(N4Py)FeIV=O]2+ species was accomplished by the reaction of [FeII(N4Py)]2+ with 20 equiv. of tBuO2H (TBHP, 70% in H2O). The temperature, [FeII(N4Py)]2+-concentration and H2O-concentration in anhydrous TBHP (5.5M in decane) dependences of its yields and rates were analyzed to indicate that the proton migration from [(N4Py)FeII-HOOtBu]2+ to [(N4Py)FeII-OO⊕HtBu]2+ is the rate-determining step followed by rapid heterolytic O-O bond cleavage of FeII-OO⊕HtBu to Fe(IV)=O complex. The formation of [(TPA)FeIV=O]2+ is thus revealed to be greatly enhanced by the similar oxidation of [FeII(TPA)]2+ (40 mM) with 10 equiv...
June 11, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29888360/the-influence-of-aggregation-on-the-third-order-nonlinear-optical-property-of-%C3%AF-conjugated-chromophores-the-case-of-cyanine-dyes
#16
Chao Wang, Yizhong Yuan
The external molecular environment like the aggregation of molecules can significantly change the intrinsic third-order nonlinear optical (NLO) property of π-conjugated chromophores. A combined experimental and theoretical study was performed to understand the influence of the aggregation of cyanines on the third-order NLO property in spin-coated thin films. Our result indicates that the H and J type cyanine dimers prefer the polyene-like structures and the P type dimer displays a comparatively smaller bond length alternation (BLA)...
June 11, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29885422/plasminogen-activator-system-homeostasis-and-its-dysregulation-by-ethanol-in-astrocyte-cultures-and-the-developing-brain
#17
Clare J Wilhelm, Joel G Hashimoto, Melissa L Roberts, Xiaolu Zhang, Calla M Goeke, Shelley H Bloom, Marina Guizzetti
In utero alcohol exposure can cause fetal alcohol spectrum disorders (FASD), characterized by structural brain abnormalities and long-lasting behavioral and cognitive dysfunction. Neuronal plasticity is affected by in utero alcohol exposure and can be modulated by extracellular proteolysis. Plasmin is a major extracellular serine-protease whose activation is tightly regulated by the plasminogen activator (PA) system. In the present study we explored the effect of ethanol on the expression of the main components of the brain PA system in sex-specific cortical astrocyte primary cultures in vitro and in the cortex and hippocampus of post-natal day (PD) 9 male and female rats...
June 6, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29883943/effects-of-zanthoxylum-piperitum-ethanol-extract-on-osteoarthritis-inflammation-and-pain
#18
Kyung-A Hwang, Jeong Eun Kwon, YooHun Noh, BongKyun Park, Yong Joon Jeong, Sun-Mee Lee, Se-Young Kim, InHye Kim, Se Chan Kang
Degenerative arthritis, also known as osteoarthritis (OA), is the most common type of arthritis, which is caused by degenerative damage of the cartilage, which primarily protects the joints, leading to inflammation and pain. The objective of this study was to investigate the in vivo and in vitro effects of treatment with ZPE-LR (90% EtOH extract of Zanthoxylum piperitum) on pain severity and inflammation. When using an in vivo OA model MIA (monosodiumidoacetate-induced arthritis) rats, ZPE-LR (100 mg/kg) oral-administratio significantly inhibited MIA-induced change in loaded weight ratio on the left foot, and articular cartilage thickness...
June 5, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29883540/thiazolidine-peracetates-carbohydrate-derivatives-that-readily-assign-cis-trans-2-3-monosaccharides-by-gc-ms-analysis
#19
Neil P J Price, Trina M Hartman, Karl E Vermillion
A novel group of carbohydrate derivatives is described that uniquely assign cis/trans-2,3 aldose stereoisomers at low nanomolar concentrations. Aldopentoses or aldohexoses, or component aldoses from hydrolysis of polysaccharides or oligosaccharides, react with cysteamine in pyridine to give quantitative formation of thiazolidines, which are subsequently peracetylated in a one-pot reaction. The non-polar thiazolidines peracetate (TPA) derivatives are analyzed by GC/EI-MS, each aldose giving rise to two TPA geometric isomers...
June 8, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29883175/continuous-sound-velocity-measurements-along-the-shock-hugoniot-curve-of-quartz
#20
Mu Li, Shuai Zhang, Hongping Zhang, Gongmu Zhang, Feng Wang, Jianheng Zhao, Chengwei Sun, Raymond Jeanloz
We report continuous measurements of the sound velocity along the principal Hugoniot curve of α quartz between 0.25 and 1.45 TPa, as determined from lateral release waves intersecting the shock front as a function of time in decaying-shock experiments. The measured sound velocities are lower than predicted by prior models, based on the properties of stishovite at densities below ∼7  g/cm^{3}, but agree with density functional theory molecular dynamics calculations and an empirical wide-regime equation of state presented here...
May 25, 2018: Physical Review Letters
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