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https://www.readbyqxmd.com/read/29775879/catalytic-degradation-of-organophosphorous-nerve-agent-simulants-by-polymer-beads-graphene-oxide-with-organophosphorus-hydrolase-like-activity-based-on-rational-design-of-functional-bimetallic-nuclear-ligand
#1
Xuejuan Ma, Lin Zhang, Mengfan Xia, Xiaohong Zhang, Yaodong Zhang
The degradation of organophosphorous nerve agents is of primary concern due to the severe toxicity of these agents. Based on the active center of organophosphorus hydrolase (OPH), a bimetallic nuclear ligand, (5-vinyl-1,3-phenylene)bis(di(1H-imidazol-2-yl) methanol) (VPIM), was designed and synthesized, which contains four imidazole groups to mimic the four histidines at OPH active center. By grafting VPIM on graphene oxide (GO) surface via polymerization, the VPIM-polymer beads@GO was produced. The obtained OPH mimics has an impressive activity in dephosphorylation reactions (turnover frequency (TOF) towards paraoxon: 2...
May 15, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29772867/-depressant-effect-of-lithium-on-apoptosis-of-nerve-cells-of-adult-rats-after-spinal-cord-injury
#2
Fang Wang, Chao Zhou, Zheng-Chao Gao, Yu-Huan Li, Wen-Long Yang, Dong Wang, Hao-Peng Li, Xi-Jing He
OBJECTIVE: To study whether lithium agent produces neuroprotective effect by inhibiting the nerve cell apoptosis of rats after spinal cord injury. METHODS: Forty-two male SD rats weighing 200 to 250 g were randomly divided into 3 groups: blank control group( n =6) without surgery, normal saline(NS) group( n =18) with intraperitoneal injection of NS (40 mg/kg); and Lithium chloride (Licl) group ( n =18) with intraperitoneal injection of Licl (40 mg/kg). After Allen method modeling, Licl group started intraperitoneal injection of Licl solution (40 mg·kg⁻¹·d⁻¹) within 15 min after operation to the second week...
April 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29772260/oxime-assisted-reactivation-of-tabun-inhibited-acetylcholinesterase-analysed-by-active-site-mutations
#3
Maja Katalinić, Goran Šinko, Nikolina Maček Hrvat, Tamara Zorbaz, Anita Bosak, Zrinka Kovarik
The antidotal property of oximes is attributed to their ability to reactivate acetylcholinesterase (AChE) inhibited by organophosphorus compounds (OP) such as pesticides and nerve warfare agents. Understanding their interactions within the active site of phosphylated AChE is of great significance for the search for more efficient reactivators, especially in the case of the most resistant OP to reactivation, tabun. Therefore, herein we studied the interactions and reactivation of tabun-inhibited AChE by site-directed mutagenesis and a series of bispyridinium oximes...
May 14, 2018: Toxicology
https://www.readbyqxmd.com/read/29770392/promotion-of-neurite-outgrowth-by-rationally-designed-ngf-%C3%AE-binding-peptide-nanofibers
#4
Zeynep Okur, Oya I Senturk, Canelif Yilmaz, Gulcihan Gulseren, Busra Mammadov, Mustafa O Guler, Ayse B Tekinay
Promotion of neurite outgrowth is an important limiting step for regeneration in nerve injury and depends strongly on the local expression of nerve growth factor (NGF). The rational design of bioactive materials is a promising approach for the development of novel therapeutic methods for nerve regeneration, and biomaterials capable of presenting NGF to nerve cells are especially suitable for this purpose. In this study, we show bioactive peptide amphiphile (PA) nanofibers capable of promoting neurite outgrowth by displaying high density binding epitopes for NGF...
May 17, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/29768075/evaluating-mice-lacking-serum-carboxylesterase-as-a-behavioral-model-for-nerve-agent-intoxication
#5
Emily N Dunn, Teresa M Ferrara-Bowens, Mark E Chachich, Cary L Honnold, Cristin C Rothwell, Heidi M Hoard-Fruchey, Catherine A Lesyna, Erik A Johnson, Douglas M Cerasoli, John H McDonough, C Linn Cadieux
Mice and other rodents are typically utilized for chemical warfare nerve agent research. Rodents have large amounts of carboxylesterase in their blood, while humans do not. Carboxylesterase non-specifically binds to and detoxifies nerve agent. The presence of this natural bioscavenger makes mice and other rodents poor models for studies identifying therapeutics to treat humans exposed to nerve agents. To obviate this problem, a serum carboxylesterase knockout (Es1 KO) mouse was created. In this study, Es1 KO and wild type (WT) mice were assessed for differences in gene expression, nerve agent (soman; GD) median lethal dose (MLD) values, and behavior prior to and following nerve agent exposure...
May 16, 2018: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/29766790/malt-lymphoma-stress-ulcer-and-cholinergic-nerves-from-the-viewpoint-of-bilateral-and-unilateral-truncal-vagotomy-and-substance-p
#6
Yosuke Kodama, Kazuki Sasaki, Futa Murasato, Anders Øverby, Shinichi Takahashi, Somay Y Murayama, Hidenori Matsui, Masahiko Nakamura
BACKGROUND: Vagal nerve plays an important role in the stomach function. The cholinergic nerves are the most abundantly distributed nerves in the gastric tissue. It has recently been reported that the vagal nerve is significantly related to both gastric cancer development and progression. However, its relation to the mesenchymal tumor, including MALT lymphoma, is not known. In this study, we investigated the effect of unilateral truncal vagotomy on gastric MALT lymphoma development by using Helicobacter heilmannii-infected mouse model as well as that of bilateral truncal vagotomy on stress-induced ulcer formation...
May 15, 2018: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29761349/intracochlear-administration-of-steroids-with-a-catheter-during-human-cochlear-implantation-a-safety-and-feasibility-study
#7
Nils K Prenzler, Rolf Salcher, Max Timm, Lutz Gaertner, Thomas Lenarz, Athanasia Warnecke
Suppression of foreign body reaction, improvement of electrode-nerve interaction, and preservation of residual hearing are essential research topics in cochlear implantation. Intracochlear pharmaco- or cell-based therapies can open new horizons in this field. Local drug delivery strategies are desirable as higher local concentrations of agents can be realized and side effects can be minimized compared to systemic administrations. When administered locally at accessible, basal parts of the cochlea, drugs reach apical regions later and in much lower concentrations due to poor diffusion patterns in cochlear fluids...
May 14, 2018: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/29761218/bilateral-inferior-vestibular-nerve-lesion-a-late-neurotoxic-effect-of-liposoluble-myelographic-contrast-agent-case-report-with-imaging-and-electrophysiological-confirmation
#8
Rita Fernandes Sousa, João Levy, Jorge Campos, Leonel Luis
No abstract text is available yet for this article.
May 14, 2018: Clinical Neuroradiology
https://www.readbyqxmd.com/read/29757723/ct-and-mr-imaging-features-of-artificial-urinary-sphincters-penile-prostheses-and-other-devices-in-the-male-lower-genitourinary-tract
#9
Elizabeth T Chorney, Parvati Ramchandani, William I Jaffe, Evan S Siegelman
Urinary incontinence and erectile dysfunction are relatively common conditions in the aging male population. Surgical interventions for urinary incontinence include placement of an artificial urinary sphincter (AUS), perineal sling, or sacral nerve stimulator and injections of periurethral bulking agents. Erectile dysfunction can be treated surgically with placement of a penile prosthesis. The complications of these devices can be broadly categorized as device component malposition, malfunction, and infection...
May 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29757691/a-patent-review-of-butyrylcholinesterase-inhibitors-and-reactivators-2010-2017
#10
Vincenza Andrisano, Marina Naldi, Angela De Simone, Manuela Bartolini
Butyrylcholinesterase (BuChE) has obtained a renewed interest as a therapeutic target in Alzheimer's disease (AD), when changes in BuChE activity and expression along disease progression were highlighted as well as correlation between BuChE levels and cognitive function. Areas covered. During the last seven years, fourteen patents on BuChE inhibitors (BuChEI) have been submitted. Only three of them relate to BuChE selective inhibitors, while four of them focus on multitarget inhibitors which address different key pathological factors other than BuChE...
May 14, 2018: Expert Opinion on Therapeutic Patents
https://www.readbyqxmd.com/read/29757015/novichok-a-murderous-nerve-agent-attack-in-the-uk
#11
J Allister Vale, Timothy C Marrs, Robert L Maynard
No abstract text is available yet for this article.
May 14, 2018: Clinical Toxicology
https://www.readbyqxmd.com/read/29756589/effect-of-combination-therapy-with-neuroprotective-and-vasoprotective-agents-on-cerebral-ischemia
#12
Jiping Yang, Bei Yang, Baoxin Xiu, Jinchong Qi, Huaijun Liu
Because most tested drugs are active against only one of the damaging processes associated with stroke, other mechanisms may cause cellular death. Thus, a combination of protective agents targeting different pathophysiological mechanisms may obtain better effects than a single agent. The major objective of this study was to investigate the effect of combination therapy with vascular endothelial growth factor (VEGF) and nerve growth factor (NGF) after controlled ischemic brain injury in rabbits. METHODS: Animals were randomly assigned to one of the following groups: sham group, saline-treated control group or NGF+VEGF-treated group...
May 2018: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/29756582/polypharmacology-approach-against-migraine-with-aura-and-brain-edema-for-the-development-of-an-efficient-inhibitor-and-its-analogues
#13
Samawia Rizwan, Asim Mehmood, Irum Khalid, Muhammad Saad Khan, Qudsia Yousafi, Hayssam M Ali, Mohamed S Elshikh, Saima Kalsoom, Hamid Rashid
Polypharmacology is a design or use of pharmaceutical agents in which single drug is used to treat multiple diseases. Aquaporin proteins are identified to treat migraine with aura and brain edema. This study focuses on Aquaporin-1 and Aquaporin-4. AQP-1 is expressed in small afferent sensory nerve fibers. Over-expression of peripheral nervous system causes migraine. AQP-4 is an abundant channel water protein in brain that regulates water transport to prevent homeostasis. Over-expression of AQP-4 contributes to water imbalance in ischemic pathology resulting in cerebral edema...
May 13, 2018: Current Computer-aided Drug Design
https://www.readbyqxmd.com/read/29754503/hesperidin-suppresses-renin-angiotensin-system-mediated-nox2-over-expression-and-sympathoexcitation-in-2k-1c-hypertensive-rats
#14
Chutamas Wunpathe, Prapassorn Potue, Putcharawipa Maneesai, Sarawoot Bunbupha, Parichat Prachaney, Upa Kukongviriyapan, Veerapol Kukongviriyapan, Poungrat Pakdeechote
Hesperidin, a flavonoid derived from citrus fruits, possesses several beneficial effects including anti-oxidation and anti-inflammation. The aim of this study was to investigate the effects of hesperidin on the renin-angiotensin system (RAS) cascade that mediated oxidative stress and sympathoexcitation in two-kidney, one-clipped (2K-1C) hypertensive rats. 2K-1C hypertension was induced in male Sprague-Dawley rats. Hypertensive rats were treated with hesperidin at 20[Formula: see text]mg/kg or 40[Formula: see text]mg/kg or losartan at 10[Formula: see text]mg/kg beginning at three weeks after surgery and then continued for four weeks ([Formula: see text]/group)...
May 13, 2018: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/29753153/efficient-derivatization-of-methylphosphonic-and-aminoethylsulfonic-acids-related-to-nerve-agents-simultaneously-in-soils-using-trimethyloxonium-tetrafluoroborate-for-their-enhanced-qualitative-detection-and-identification-by-ei-gc-ms-and-gc-fpd
#15
Carlos A Valdez, Mira K Marchioretto, Roald N Leif, Saphon Hok
Trimethyloxonium tetrafluoroborate (TMO·BF4 ) has been used in the simultaneous derivatization of phosphonic and 2-aminoethylsulfonic acids related to nerve agents in different soils for their enhanced detection and identification by electron ionization gas chromatography-mass spectrometry (EI-GC-MS). The panel of acids consisted of five Schedule 2 phosphonic acids (methyl methylphosphonic acid, ethyl methylphosphonic acid, isopropyl methylphosphonic acid, pinacolyl methylphosphonic acid and cyclohexyl methylphosphonic acid) along with two sulfonic acids, N,N-diethyl-2-aminoethylsulfonic acid and N,N-diisopropyl-2-aminoethylsulfonic acid...
April 27, 2018: Forensic Science International
https://www.readbyqxmd.com/read/29749662/high-resolution-nerve-ultrasound-and-electrophysiological-findings-in-restless-legs-syndrome
#16
K Pitarokoili, M Fels, A Kerasnoudis, L Toenges, R Gold, M-S Yoon
BACKGROUND AND PURPOSE: Restless legs syndrome (RLS) is a multifactorial network disorder of a sensorimotor system extending from dopaminergic and glutamatergic cerebral structures to the spinal neurons and peripheral nerves. The role of peripheral nerve damage in the causality and severity progression for RLS patients remains unclear. METHODS: We performed a clinical and epidemiological study on a cohort of 34 RLS patients focusing on RLS risk factors and disease severity...
May 11, 2018: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/29747078/mechanisms-of-acetylcholinesterase-protection-against-sarin-and-soman-by-adenosine-a-1-receptor-agonist-n-6-cyclopentyladenosine
#17
Ariana Beste, DeCarlos E Taylor, Tsung-Ming Shih, Thaddeus P Thomas
Organophosphorus nerve agents (NAs) irreversibly inhibit acetylcholinesterase (AChE), the enzyme responsible for breaking down the neurotransmitter acetylcholine (ACh). The over accumulation of ACh after NA exposure leads to cholinergic toxicity, seizure, and death. Current medical countermeasures effectively mitigate peripheral symptoms, however; the brain is often unprotected. Alternative acute treatment with the adenosine A1 receptor agonist N6 -cyclopentyladensosine (CPA) has previously been demonstrated to prevent AChE inhibition as well as to suppress neuronal activity...
May 7, 2018: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/29743372/-breadth-and-functionality-of-varicella-zoster-virus-glycoprotein-specific-antibodies-identified-after-zostavax-vaccination-in-humans
#18
Nicole L Sullivan, Morgan A Reuter-Monslow, Janet Sei, Eberhard Durr, Carl W Davis, Cathy Chang, Megan McCausland, Andreas Wieland, David Krah, Nadine Rouphael, Aneesh K Mehta, Mark J Mulligan, Bali Pulendran, Rafi Ahmed, Kalpit A Vora
Herpes zoster (HZ/shingles) is the clinical manifestation of varicella zoster virus (VZV) reactivation. HZ typically develops as people age due to decreased cell-mediated immunity. However, the importance of antibodies for immunity against HZ prevention remains to be understood. The goal of this study was to examine the breadth and functionality of VZV-specific antibodies after vaccination with a live attenuated HZ vaccine (Zostavax). Direct enumeration of VZV-specific antibody secreting cells (ASC) via ELISPOT showed that Zostavax can induce both IgG and IgA ASCs seven days after vaccination, but not IgM ASCs...
May 9, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29741434/effects-of-oxaliplatin-treatment-on-the-myenteric-plexus-innervation-and-glia-in-the-murine-distal-colon
#19
Vanesa Stojanovska, Rachel M McQuade, Sarah Miller, Kulmira Nurgali
Oxaliplatin (platinum-based chemotherapeutic agent) is a first-line treatment of colorectal malignancies; its use associates with peripheral neuropathies and gastrointestinal side effects. These gastrointestinal dysfunctions might be due to toxic effects of oxaliplatin on the intestinal innervation and glia. Male Balb/c mice received intraperitoneal injections of sterile water or oxaliplatin (3 mg/kg/d) triweekly for 2 weeks. Colon tissues were collected for immunohistochemical assessment at day 14. The density of sensory, adrenergic, and cholinergic nerve fibers labeled with calcitonin gene-related peptide (CGRP), tyrosine hydroxylase (TH), and vesicular acetylcholine transporter (VAChT), respectively, was assessed within the myenteric plexus of the distal colon...
May 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29736880/comparison-of-peripheral-nerve-protection-between-insulin-based-glucose-control-and-alpha-lipoic-acid-ala-in-the-streptozotocin-stz-induced-diabetic-rat
#20
Kyung Ae Lee, Na Young Lee, Tae Sun Park, Heung Yong Jin
Strict glucose control is a well-proven therapeutic approach for peripheral neuropathies in patients with diabetes. Alpha lipoic acid (ALA) has also been accepted as a therapeutic agent for diabetic peripheral neuropathy (DPN) in the respect of pathogenesis. However, the potential of ALA as a treatment for DPN in comparison to that of glucose control is unclear. In this study, we compared the neuroprotective potential of glucose control and ALA. Animals were divided into 6 groups based on the intervention used, as follows: normal, diabetes (DM), DM+racemic form of ALA, DM+R form of ALA, DM+once daily insulin glargine, and DM+once daily insulin glargine with twice daily insulin glulisine...
May 7, 2018: Endocrine
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