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https://www.readbyqxmd.com/read/28429852/anti-inflammatory-and-retinal-protective-effects-of-capsaicin-on-ischemia-induced-injuries-through-the-release-of-endogenous-somatostatin
#1
Jun Wang, Wenke Tian, Shuaiwei Wang, Wenqiang Wei, Dongdong Wu, Honggang Wang, Li Wang, Ruisheng Yang, Ailing Ji, Yanzhang Li
The mechanisms regarding the retinal protective and anti-inflammatory effects of capsaicin (CAP) remain unclear. Somatostatin is contained in CAP-sensitive sensory neurons, including nerve terminals, from which it can be released by capsaicin. The present study provides a novel neurohumoral regulatory mechanism for CAP-induced-endogenous somatostatin in a retinal ischemic-reperfusion (I/R) mouse model. CAP (0.5 mg kg(-1) ) was injected subcutaneously 5 min after I/R. A selective somatostatin-depleting agent, cysteamine, was applied subcutaneously 4 hours before the experiment to examine the effects of endogenous somatostatin...
April 21, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28428628/inflammatory-and-neuropathic-nociception-is-preserved-in-gpr55-knockout-mice
#2
Lawrence M Carey, Tannia Gutierrez, Liting Deng, Wan-Hung Lee, Ken Mackie, Andrea G Hohmann
The G-protein coupled receptor GPR55 has been postulated to serve as a novel cannabinoid receptor. A previous report indicated that GPR55 knockout mice fail to develop mechanical hyperalgesia, suggesting a pro-nociceptive role for GPR55 in the control of nociceptive responding. However, GPR55 knockout mice remain incompletely characterized in models of pathological pain. Here we provide a comprehensive assessment of responses of GPR55 knockout and wild-type mice to mechanical and thermal (heat, cold) stimulation in multiple, mechanistically distinct models of inflammatory and neuropathic pain...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28421634/vagus-nerve-stimulation-a-new-promising-therapeutic-tool-in-inflammatory-bowel-disease
#3
B Bonaz, V Sinniger, S Pellissier
Inflammatory bowel disease (IBD), that is Crohn's disease (CD) and ulcerative colitis, affects about 1.5 million persons in the USA and 2.2 million in Europe. The pathophysiology of IBD involves immunological, genetic and environmental factors. The treatment is medico-surgical but suspensive. Anti-TNFα agents have revolutionized the treatment of IBD but have side effects. In addition, a non-negligible percentage of patients with IBD stop or take episodically their treatment. Consequently, a nondrug therapy targeting TNFα through a physiological pathway, devoid of major side effects and with a good cost-effectiveness ratio, would be of interest...
April 18, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28418689/an-official-american-thoracic-society-workshop-report-chemical-inhalational-disasters-biology-of-lung-injury-development-of-novel-therapeutics-and-medical-preparedness
#4
Eleanor M Summerhill, Gary W Hoyle, Sven-Eric Jordt, Bronwen J Jugg, James G Martin, Sadis Matalon, Steven E Patterson, David J Prezant, Alfred M Sciuto, Erik R Svendsen, Carl W White, Livia Veress
This report is based upon the proceedings from the Inhalational Lung Injury Workshop jointly sponsored by the American Thoracic Society (ATS) and the National Institute of Health (NIH)/National Institute of Neurologic Disorders and Stroke (NINDS) Countermeasures Against Chemical Threats (CounterACT) program on May 21, 2013 in Philadelphia, PA. The CounterACT program facilitates research leading to the development of new and improved medical countermeasures for chemical threat agents. The workshop was initiated by the Terrorism and Inhalational Disasters (TID) Section of the Environmental, Occupational, and Population Health Assembly (EOPH) of the ATS...
April 18, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28412715/non-centralized-and-functionally-localized-nervous-system-of-ophiuroids-evidence-from-topical-anesthetic-experiments
#5
Yoshiya Matsuzaka, Eiki Sato, Takeshi Kano, Hitoshi Aonuma, Akio Ishiguro
Ophiuroids locomote along the seafloor by coordinated rhythmic movements of multi-segmented arms. The mechanisms by which such coordinated movements are achieved are a focus of interest from the standpoints of neurobiology and robotics, because ophiuroids appear to lack a central nervous system that could exert centralized control over five arms. To explore the underlying mechanism of arm coordination, we examined the effects of selective anesthesia to various parts of the body of ophiuroids on locomotion. We observed the following: (1) anesthesia of the circumoral nerve ring completely blocked the initiation of locomotion; however, initiation of single arm movement, such as occurs during the retrieval of food, was unaffected, indicating that the inability to initiate locomotion was not due to the spread of the anesthetic agent...
April 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28407906/antioxidant-and-antibiofilm-activities-of-secondary-metabolites-from-ziziphus-jujuba-leaves-used-for-infusion-preparation
#6
Silvia Damiano, Martino Forino, Arpan De, Luca A Vitali, Giulio Lupidi, Orazio Taglialatela-Scafati
Ziziphus jujuba Mill., jujube, leaf infusions are popular bedtime beverages as they improve sleep by soothing the nerves. With the aim of providing further insights into the polyphenol content of jujube leaf infusion and their antioxidant activities, a 2,2-diphenyl-1-picrylhydrazyl (DPPH)-guided purification of the aqueous extract of Z. jujuba Mill. leaves was conducted. Three major antioxidant polyphenols (i.e. quercitrin, catechin and gallocatechin) of the leaves were identified. In addition, a significant antibiofilm bioactivity against Streptococcus mutans, a causative agent of human dental caries, was detected for the aqueous leaf extract and its bio-guided separation resulted in the identification of the lupane triterpenoid alphitolic acid as the main antibiofilm metabolite...
September 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28404526/stereospecific-cholinesterase-inhibition-by-o-s-diethylphenylphosphonothioate
#7
Ahmed Mohammed, Jennifer Sneathen, Sara Glazier Frojen, Louis Kuo, Cynthia M Dupureur
The inhibition kinetics and stereospecificity of the chiral nerve agent derivative O,S-diethylphenylphosphonothioate (DEPP) were examined for two forms of acetylcholinesterase (human and eel) and equine butyrylcholinesterase. Both S- and R-DEPP are poor inhibitors of eel AChE (IC50 150μM), consistent with a large, nondiscriminatory binding interaction in the active site of this enzyme. However, S-DEPP is active against human and equine AChE with low μM IC50s. DEPP stereospecificities (S/R) toward these enzymes are moderate (20) relative to other cholinesterase-organophosphate (OP) systems...
March 30, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28397136/an-experimental-animal-model-for-percutaneous-procedures-used-in-trigeminal-neuralgia
#8
Johannes Herta, Wei-Te Wang, Romana Höftberger, Sabine Breit, Sibylle Kneissl, Helga Bergmeister, Heber Ferraz-Leite
OBJECT: This study describes an experimental rabbit model that allows the reproduction of percutaneous operations that are used in patients with trigeminal neuralgia (TN). Attention was given to an exact anatomical description of the rabbit's middle cranial fossa as well as the establishment of conditions for a successful procedure. METHODS: Morphometric measurements were taken from 20 rabbit skulls and CT scans. The anatomy of the trigeminal nerve, as well as its surrounding structures, was assessed by bilateral dissection of 13 New Zealand white rabbits (NWR)...
April 10, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28396583/atomic-level-structural-dynamics-of-polyoxoniobates-during-dmmp-decomposition
#9
Qi Wang, Robert C Chapleski, Anna M Plonka, Wesley O Gordon, Weiwei Guo, Thuy-Duong Nguyen-Phan, Conor H Sharp, Nebojsa S Marinkovic, Sanjaya D Senanayake, John R Morris, Craig L Hill, Diego Troya, Anatoly I Frenkel
Ambient pressure in situ synchrotron-based spectroscopic techniques have been correlated to illuminate atomic-level details of bond breaking and formation during the hydrolysis of a chemical warfare nerve agent simulant over a polyoxometalate catalyst. Specifically, a Cs8[Nb6O19] polyoxoniobate catalyst has been shown to react readily with dimethyl methylphosphonate (DMMP). The atomic-level transformations of all reactant moieties, the [Nb6O19](8-) polyanion, its Cs(+) counterions, and the DMMP substrate, were tracked under ambient conditions by a combination of X-ray absorption fine structure spectroscopy, Raman spectroscopy, and X-ray diffraction...
April 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28393024/biomechanics-of-sclera-crosslinked-using-genipin-in-rabbit
#10
Tai-Xiang Liu, Zheng Wang
AIM: To strengthen the biomechanics of collagen by crosslinking rabbit scleral collagen with genipin to develop a new therapy for preventing myopic progression. METHODS: Ten New Zealand rabbits were treated with 0.5 mmol/L genipin injected into the sub-Tenon's capsule in the right eyes. Untreated contralateral eyes served as the control. The treated area was cut into scleral strips measuring 4.0 mm×10.0 mm for stress-strain measurements (n=5). The remaining five treated eyes were prepared for histological examination...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28391556/microtubule-targeting-agents-eribulin-and-paclitaxel-differentially-affect-neuronal-cell-bodies-in-chemotherapy-induced-peripheral-neuropathy
#11
Sarah J Benbow, Krystyna M Wozniak, Bridget Kulesh, April Savage, Barbara S Slusher, Bruce A Littlefield, Mary Ann Jordan, Leslie Wilson, Stuart C Feinstein
Chemotherapy-induced peripheral neuropathy (CIPN) is a common side effect of anticancer treatment with microtubule-targeted agents (MTAs). The frequency of severe CIPN, which can be dose limiting and even life threatening, varies widely among different MTAs. For example, paclitaxel induces a higher frequency of severe CIPN than does eribulin. Different MTAs also possess distinct mechanisms of microtubule-targeted action. Recently, we demonstrated that paclitaxel and eribulin differentially affect sciatic nerve axons, with paclitaxel inducing more pronounced neurodegenerative effects and eribulin inducing greater microtubule stabilizing biochemical effects...
April 8, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28388396/acute-facial-nerve-palsy-with-ipsilateral-soft-palate-ulcers
#12
C Mauprivez, C Comte, M Labrousse, R H Khonsari
Ramsay-Hunt syndrome (RHS) is a rare complication of herpes zoster in which reactivation of latent varicella zoster virus (VZV) infection occurs in the geniculate ganglion. Major clinical findings are peripheral facial nerve palsy accompanied by ipsilateral ear pain and erythematous vesicular rash on the external ear (herpes zoster oticus) and in the mouth. Thus, diagnosis of RHS is usually clinical. However, auricular herpetic eruption is not always present, making diagnosis more difficult. This report describes a case of RHS with left facial palsy without skin lesions in 60-year-old woman...
March 14, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28388366/ellagic-acid-protects-against-neuron-damage-in-ischemic-stroke-through-regulating-the-ratio-of-bcl-2-bax-expression
#13
Qing-Shan Liu, Ran Deng, Shuran Li, Xu Li, Keqin Li, Kebaituli Gulibanumu, Xueli Li, Rui Liu
To research the effects of ellagic acid (EA), a low molecular weight polyphenol, on neuron cells and function, and to evaluate whether EA can be safely utilized by humans as a functional food or therapeutic agent, an oxygen-glucose deprivation and reoxygenation (ODG/R) model in primary cultured rat cortical neurons were created in this work. Administration of EA significantly decreased the volume of cerebrum infarction and the neurological deficit scores of the rats; EA treatment also increased the number of Bcl-2-positive cells and the ratio of Bcl-2-positive to Bax-positive neurons in semidarkness zone near brain ischemic focus in the PCI model...
April 7, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28383293/peripheral-nerve-block-as-a-supplement-to-light-or-deep-general-anesthesia-in-elderly-patients-receiving-total-hip-arthroplasty-a-prospective-randomized-study
#14
Bin Mei, Hanning Zha, Xiaolong Lu, Xinqi Cheng, Shishou Cheng, Xuesheng Liu, Yuanhai Li, Erwei Gu
BACKGROUND: Peripheral nerve block combined with general anesthesia is a preferable anesthesia method for elderly patients receiving hip arthroplasty. The depth of sedation may influence patient recovery. Therefore, we aimed to investigate the influence of peripheral nerve blockade and different intraoperative sedation levels on the short-term recovery of elderly patients receiving total hip arthroplasty. METHODS: Patients aged 65 years and older undergoing total hip arthroplasty were randomized into three groups: a general anesthesia without lumbosacral plexus block group, and two general anesthesia plus lumbosacral plexus block groups, each with a different level of sedation (light or deep)...
April 5, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/28382180/structure-efficiency-relationships-of-cyclodextrin-scavengers-in-the-hydrolytic-degradation-of-organophosphorus-compounds
#15
Sophie Letort, Michaël Bosco, Benedetta Cornelio, Frédérique Brégier, Sébastien Daulon, Géraldine Gouhier, François Estour
New derivatives of cyclodextrins were prepared in order to determine the relative importance of the structural key elements involved in the degradation of organophosphorus nerve agents. To avoid a competitive inclusion between the organophosphorus substrate and the iodosobenzoate group, responsible for its degradation, the latter group had to be covalently bound to the cyclodextrin scaffold. Although the presence of the α nucleophile iodosobenzoate was a determinant in the hydrolysis process, an imidazole group was added to get a synergistic effect towards the degradation of the agents...
2017: Beilstein Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28381927/the-effects-of-minocycline-on-spinal-root-avulsion-injury-in-rat-model
#16
Tan Yew Chin, Sim Sze Kiat, Hizal Ghazali Faizul, Wutian Wu, Jafri Malin Abdullah
BACKGROUND: The neuroprotective role of minocycline in the treatment of brachial plexus injury is controversial. OBJECTIVE: To study the neuroprotective effect of minocycline via different routes in adult Sprague Dawley rats with brachial plexus injury. METHODS: The C7 nerve roots of the animals were avulsed via an anterior extravertebral approach. Traction force was used to transect the ventral motor nerve roots at the preganglionic level...
March 2017: Malaysian Journal of Medical Sciences: MJMS
https://www.readbyqxmd.com/read/28381802/prophylactic-administration-of-aucubin-inhibits-paclitaxel-induced-mechanical-allodynia-via-the-inhibition-of-endoplasmic-reticulum-stress-in-peripheral-schwann-cells
#17
Tsugunobu Andoh, Daisuke Uta, Mitsuru Kato, Kazufumi Toume, Katsuko Komatsu, Yasushi Kuraishi
Paclitaxel is a chemotherapeutic agent that causes peripheral neuropathy as its major dose-limiting side effect. However, the peripheral neuropathy is difficult to manage. A study we recently conducted showed that repetitive administration of aucubin as a prophylactic inhibits paclitaxel-induced mechanical allodynia. However, the mechanisms underlying the anti-allodynic activity of aucubin, which is a major component of Plantaginis Semen, was unclear. In addition to mechanical allodynia, aucubin inhibited spontaneous and mechanical stimuli-induced firing in spinal dorsal horn neurons; however, catalpol, a metabolite of aucubin, did not show these effects...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28375916/neuropathic-pain
#18
Lindsay A Zilliox
PURPOSE OF REVIEW: Neuropathic pain is a frequently encountered condition that is often resistant to treatment and is associated with poor patient satisfaction of their treatment. Several medications have been shown to be effective in treating neuropathic pain associated with diabetic neuropathy and postherpetic neuralgia, and these medications are often used to treat neuropathic pain associated with other conditions as well. This article summarizes the diagnosis and assessment of patients with neuropathic pain as well as available pharmacologic and interventional treatment options...
April 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28374060/possible-utility-of-contrast-enhanced-ultrasonography-for-detecting-spread-of-local-anesthetic-in-nerve-block
#19
Hideaki Sasaki, Masanori Yamauchi, Takafumi Ninomiya, Haruyuki Tatsumi, Michiaki Yamakage
PURPOSE: This study demonstrated the effects of perfluorobutane (Sonazoid(®)) with contrast-enhanced ultrasonography (CEUS) to identify the spread of local anesthetics in ultrasound-guided nerve block. METHODS: This study consists of simulation, cadaveric, and animal studies. In a simulation study, 1% lidocaine with 10- to 1000-fold diluted Sonazoid(®), a US-specific contrast agent to diagnose hepatic and breast cancers (0.5 mL), was injected into a resin-based phantom to determine the optimal concentration for ultrasound-guided peripheral nerve block...
April 3, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28372358/determination-of-nerve-agent-metabolites-by-ultraviolet-femtosecond-laser-ionization-mass-spectrometry
#20
Akifumi Hamachi, Tomoko Imasaka, Hiroshi Nakamura, Adan Li, Totaro Imasaka
Nerve agent metabolites, i.e., isopropyl methylphosphonic acid (IMPA) and pinacolyl methylphosphonic acid (PMPA), were derivatized by reacting them with 2,3,4,5,6-pentafluorobenzyl bromide (PFBBr) and were determined by mass spectrometry using an ultraviolet femtosecond laser emitting at 267 and 200 nm as the ionization source. The analytes of the derivatized compounds, i.e., IMPA-PFB and PMPA-PFB, contain a large side-chain, and molecular ions are very weak or absent in electron ionization mass spectrometry...
April 4, 2017: Analytical Chemistry
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