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https://www.readbyqxmd.com/read/29333621/characterization-of-mouse-neuro-urological-dynamics-in-a-novel-decerebrate-arterially-perfused-mouse-dapm-preparation
#1
Hiroki Ito, Marcus J Drake, Christopher H Fry, Anthony J Kanai, Anthony E Pickering
AIM: To develop the decerebrate arterially perfused mouse (DAPM) preparation, a novel voiding model of the lower urinary tract (LUT) that enables in vitro-like access with in vivo-like neural connectivity. METHODS: Adult male mice were decerebrated and arterially perfused with a carbogenated, Ringer's solution to establish the DAPM. To allow distinction between central and peripheral actions of interventions, experiments were conducted in both the DAPM and in a "pithed" DAPM which has no brainstem or spinal cord control...
January 15, 2018: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/29313904/peripheral-nerve-injury-arising-in-anaesthesia-practice
#2
REVIEW
D W Hewson, N M Bedforth, J G Hardman
In this article, we will discuss the pathophysiology of peripheral nerve injury in anaesthetic practice, including factors which increase the susceptibility of nerves to damage. We will describe a practical and evidence-based approach to the management of suspected peripheral nerve injury and will go on to discuss major nerve injury patterns relating to intra-operative positioning and to peripheral nerve blockade. We will review the evidence surrounding particular strategies to reduce the incidence of peripheral nerve injury during nerve blockade, including nerve localisation methods, timing of blocks, needle techniques and design, injection pressure-monitoring and local anaesthetic and adjunct choice...
January 2018: Anaesthesia
https://www.readbyqxmd.com/read/29303925/local-anesthetic-systemic-toxicity-a-review-of-recent-case-reports-and-registries
#3
Marina Gitman, Michael J Barrington
This review summarizes presenting features, management, and outcomes of local anesthetic systemic toxicity (LAST) from published cases and those submitted to online registries capturing use of intravenous lipid emulsion (ILE) therapy. The results of single-center and multicenter registries and epidemiologic studies complement this information. Between March 2014 and November 2016, 47 separate cases of LAST were described in 35 peer-reviewed articles. Local anesthetic systemic toxicity events occurred as a result of penile blocks (23%), local infiltration (17%), and upper/lower extremity, torso, and neuraxial blockade...
January 5, 2018: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29282807/blocking-of-cytokines-signalling-attenuates-evoked-and-spontaneous-neuropathic-pain-behaviours-in-the-paclitaxel-rat-model-of-chemotherapy-induced-neuropathy
#4
S Al-Mazidi, M Alotaibi, T Nedjadi, A Chaudhary, M Alzoghaibi, L Djouhri
BACKGROUND: Chemotherapy-induced peripheral neuropathic pain (CIPNP) is a serious dose-limiting neurotoxic effect of cancer drug treatment. The underlying mechanism(s) of this debilitating condition, which lacks effective drug treatment, is incompletely understood. However, neural-immune interactions, involving increased expression and release of cytokines, are believed to be involved. Here, we examined, in the paclitaxel rat model of CIPNP, whether plasma levels of 24 cytokines/chemokines change after paclitaxel treatment, and whether blocking of signalling of some of those cytokines would reverse/attenuate behavioural signs of CIPNP...
December 27, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/29280923/local-anesthetic-systemic-toxicity-in-total-joint-arthroplasty-incidence-and-risk-factors-in-the-united-states-from-the-national-inpatient-sample-1998-2013
#5
Daniel S Rubin, Monica M Matsumoto, Guy Weinberg, Steven Roth
BACKGROUND: Local anesthetic systemic toxicity (LAST) is a rare and potentially devastating complication of regional anesthesia. Single-institution registries have reported a decreasing incidence, but these results have limited broad applicability. A recent study using a US database found a relatively high incidence of LAST. We used the National Inpatient Sample, a US database of inpatient admissions, to identify the national incidence and associated risk factors for LAST in total joint arthroplasties...
December 26, 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29227106/hollow-silica-nanoparticles-penetrate-the-peripheral-nerve-and-enhance-the-nerve-blockade-from-tetrodotoxin
#6
Qian Liu, Claudia M Santamaria, Tuo Wei, Chao Zhao, Tianjiao Ji, Tianshe Yang, Andre Shomorony, Bruce Y Wang, Daniel S Kohane
The efficacy of tetrodotoxin (TTX), a very potent local anesthetic, is limited by its poor penetration through barriers to axonal surfaces. To address this issue, we encapsulated TTX in hollow silica nanoparticles (TTX-HSN) and injected them at the sciatic nerve in rats. TTX-HSN achieved an increased frequency of successful blocks, prolonged the duration of the block, and decreased the toxicity compared to free TTX. In animals injected with fluorescently labeled HSN, the imaging of frozen sections of nerve demonstrated that HSN could penetrate into nerve and that the penetrating ability of silica nanoparticles was highly size-dependent...
December 11, 2017: Nano Letters
https://www.readbyqxmd.com/read/29222932/a-fibers-mediate-cold-hyperalgesia-in-patients-with-oxaliplatin-induced-neuropathy
#7
Julia Forstenpointner, Violetta C Oberlojer, Dennis Naleschinski, Johanna Höper, Stephanie M Helfert, Andreas Binder, Janne Gierthmühlen, Ralf Baron
Cold hyperalgesia is a common side effect of oxaliplatin treatment; still the pathophysiological and molecular mechanisms as well as the contribution of different primary afferent fiber systems are unclear. Therefore, patients with oxaliplatin-induced acute neuropathy with (n=6) and without (n=7) cold hyperalgesia were tested by applying a preferential blockade of peripheral myelinated A-fiber afferents in combination with quantitative sensory testing. Additionally, an interview-based questionnaire assessed the severity of symptoms and the impact on daily activities...
December 9, 2017: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/29215199/neurotrophically-induced-mesenchymal-progenitor-cells-derived-from-induced-pluripotent-stem-cells-enhance-neuritogenesis-via-neurotrophin-and-cytokine-production
#8
Rachel M Brick, Aaron X Sun, Rocky S Tuan
Adult tissue-derived mesenchymal stem cells (MSCs) are known to produce a number of bioactive factors, including neurotrophic growth factors, capable of supporting and improving nerve regeneration. However, with a finite culture expansion capacity, MSCs are inherently limited in their lifespan and use. We examined here the potential utility of an alternative, mesenchymal-like cell source, derived from induced pluripotent stem cells, termed induced mesenchymal progenitor cells (MiMPCs). We found that several genes were upregulated and proteins were produced in MiMPCs that matched those previously reported for MSCs...
January 2018: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/29200077/consensus-statement-on-perioperative-use-of-neuromuscular-monitoring
#9
Mohamed Naguib, Sorin J Brull, Aaron F Kopman, Jennifer M Hunter, Béla Fülesdi, Hal R Arkes, Arthur Elstein, Michael M Todd, Ken B Johnson
A panel of clinician scientists with expertise in neuromuscular blockade (NMB) monitoring was convened with a charge to prepare a consensus statement on indications for and proper use of such monitors. The aims of this article are to: (a) provide the rationale and scientific basis for the use of quantitative NMB monitoring; (b) offer a set of recommendations for quantitative NMB monitoring standards; (c) specify educational goals; and (d) propose training recommendations to ensure proper neuromuscular monitoring and management...
November 30, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29191577/electrical-stimulation-of-the-insular-cortex-as-a-novel-target-for-the-relief-of-refractory-pain-an-experimental-approach-in-rodents
#10
Luiz Fabio Dimov, Elaine Flamia Toniolo, Heloísa Alonso-Matielo, Daniel Ciampi de Andrade, Luis Garcia-Larrea, Gerson Ballester, Manoel Jacobsen Teixeira, Camila Squarzoni Dale
Cortical electrical stimulation (CES) has shown to be an effective therapeutic alternative for neuropathic pain refractory to pharmacological treatment. The primary motor cortex(M1) was the main cortical target used in the vast majority of both invasive and non-invasive studies. Despite positive results M1-based approaches still fail to relieve pain in a significant proportion of individuals. It has been advocated that the direct stimulation of cortical areas directly implicated in the central integration of pain could increase the efficacy of analgesic brain stimulation...
November 27, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29184439/ultrasound-guided-rectus-sheath-block-caudal-analgesia-or-surgical-site-infiltration-for-pediatric-umbilical-herniorrhaphy-a-prospective-double-blinded-randomized-comparison-of-three-regional-anesthetic-techniques
#11
Lance M Relland, Joseph D Tobias, David Martin, Giorgio Veneziano, Ralph J Beltran, Christopher McKee, Tarun Bhalla
Background: Umbilical hernia repair is a common pediatric surgical procedure. While opioid analgesics are a feasible option and have long been a mainstay in the pharmacological intervention for pain, the effort to improve care and limit opioid-related adverse effects has led to the use of alternative techniques, including regional anesthesia. The current study prospectively compares the analgesic efficacy of three techniques, including caudal epidural blockade, peripheral nerve blockade, and local wound infiltration, in a double-blinded study...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/29169960/oxytocin-inhibits-the-rat-medullary-dorsal-horn-sp5c-c1-nociceptive-transmission-through-ot-but-not-v1a-receptors
#12
Enrique García-Boll, Guadalupe Martínez-Lorenzana, Miguel Condés-Lara, Abimael González-Hernández
The medullary dorsal horn (MDH or Sp5c/C1 region) plays a key role modulating the nociceptive input arriving from craniofacial structures. Some reports suggest that oxytocin could play a role modulating the nociceptive input at the MDH level, but no study has properly tested this hypothesis. Using an electrophysiological and pharmacological approach, the present study aimed to determine the effect of oxytocin on the nociceptive signaling in the MDH and the receptor involved. In sevoflurane, anesthetized rats, we performed electrophysiological unitary recordings of second order neurons at the MDH region responding to peripheral nociceptive-evoked responses of the first branch (V1; ophthalmic) of the trigeminal nerve...
November 20, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29164528/equivalent-analgesic-effectiveness-between-perineural-and-intravenous-dexamethasone-as-adjuvants-for-peripheral-nerve-blockade-a-systematic-review-and-meta-analysis
#13
REVIEW
Nasir Hussain, Tom Van den Langenbergh, Corey Sermer, Manuel L Fontes, Amit Atrey, Naum Shaparin, Tamara R Sawyer, Amaresh Vydyanathan
PURPOSE: Dexamethasone is commonly used as an adjuvant to local anesthetics for peripheral nerve blockade; however, uncertainty persists regarding its optimal route of administration and safety. A systematic review and meta-analysis of randomized-controlled trials (RCTs) was conducted to compare the incremental benefits of intravenous (IV) vs perineural (PN) dexamethasone when used as adjuvants for peripheral nerve blockade to improve analgesia. SOURCES: A search strategy was developed to identify eligible articles from the Cochrane and National Library of Medicine databases from inception until June 2017...
November 21, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/29131007/proteinase-activated-receptor-2-sensitivity-of-amplified-trpa1-activity-in-skeletal-muscle-afferent-nerves-and-exercise-pressor-reflex-in-rats-with-femoral-artery-occlusion
#14
Jihong Xing, Jianhua Li
BACKGROUND/AIMS: Limb ischemia occurs in peripheral artery disease (PAD). Sympathetic nerve activity (SNA) that regulates blood flow directed to the ischemic limb is exaggerated during exercise in this disease, and transient receptor potential channel A1 (TRPA1) in thin-fiber muscle afferents contributes to the amplified sympathetic response. The purpose of the present study was to determine the role of proteinase-activated receptor-2 (PAR2) in regulating abnormal TRPA1 function and the TRPA1-mediated sympathetic component of the exercise pressor reflex...
November 6, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29054436/in-vitro-and-ex-vivo-screening-of-candidate-therapeutics-to-restore-neurotransmission-in-nerve-terminals-intoxicated-by-botulinum-neurotoxin-serotype-a1
#15
Phillip H Beske, Aaron B Bradford, Katie M Hoffman, Sydney Mason, Patrick M McNutt
Botulinum neurotoxins (BoNTs) are exceedingly potent neurological poisons that block cholinergic release in the peripheral nervous system and cause death by asphyxiation. While post-exposure prophylaxis can effectively eliminate toxin in the bloodstream, there are no clinically effective treatments to prevent or reverse disease once BoNT has entered the neuron. To address the need for post-symptomatic countermeasures, we designed and developed an in vitro assay based on whole-cell, patch-clamp electrophysiological monitoring of miniature excitatory post-synaptic currents in synaptically active murine embryonic stem cell-derived neurons...
October 17, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29042416/nicotine-prevents-and-reverses-paclitaxel-induced-mechanical-allodynia-in-a-mouse-model-of-cipn
#16
S Lauren Kyte, Wisam Toma, Deniz Bagdas, Julie A Meade, Lesley D Schurman, Aron H Lichtman, Zhi-Jian Chen, Egidio Del Fabbro, Xianjun Fang, John W Bigbee, M Imad Damaj, David A Gewirtz
Chemotherapy-induced peripheral neuropathy (CIPN), a consequence of peripheral nerve fiber dysfunction or degeneration, continues to be a dose-limiting and debilitating side effect during and/or after cancer chemotherapy. Paclitaxel, a taxane commonly used to treat breast, lung, and ovarian cancers, causes CIPN in 59-78% of cancer patients. Novel interventions are needed due to the current lack of effective CIPN treatments. Our studies were designed to investigate if nicotine can prevent and/or reverse paclitaxel-induced peripheral neuropathy in a mouse model of CIPN, while ensuring that nicotine will not stimulate lung tumor cell proliferation or interfere with the anti-tumor properties of paclitaxel...
October 17, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/29042063/-pharmacokinetic-and-clinical-effects-of-two-bupivacaine-concentrations-on-axillary-brachial-plexus-block
#17
Leonardo H C Ferraro, Alexandre Takeda, Cleber N Barreto, Bernadete Faria, Nilson A Assunção
INTRODUCTION: The risk of systemic bupivacaine toxicity is a persistent problem, which makes its pharmacokinetic study fundamental for regional anesthesia safety. There is little evidence of its influence on plasma peak at different concentrations. The present study compares two bupivacaine concentrations to establish how the concentration affects this drug plasma peak in axillary brachial plexus block. Postoperative latency and analgesia were also compared. METHODS: 30 patients were randomized...
October 14, 2017: Revista Brasileira de Anestesiologia
https://www.readbyqxmd.com/read/29031203/local-anaesthetic-pain-relief-therapy-in-vitro-and-in-vivo-evaluation-of-a-nanotechnological-formulation-co-loaded-with-ropivacaine-and-dexamethasone
#18
Yongxin Zhang, Yaocun Yue, Meng Chang
Combination therapy is frequently applied to anesthesia and analgesia for its benefits, which includes prolonged analgesia following peripheral nerve blockade, and reduced side effects. The aim of this study was to develop chitosan (CH) coated poly(ε-caprolactone) (PCL) nanoparticles to co-deliver ropivacaine (RPV) and dexamethasone (DEM) (RPV/DEM CH-PCL NPs) for the prolongation of anesthesia and pain relief. In the present study, RPV/DEM CH-PCL NPs were fabricated. The properties of CH-PCL NPs were evaluated for their particle sizes, zeta potential, drug loading capacity and in vitro drug release profile...
October 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28993250/monoaminergic-descending-pathways-contribute-to-modulation-of-neuropathic-pain-by-increasing-intensity-treadmill-exercise-after-peripheral-nerve-injury
#19
Victor M Lopez-Alvarez, Maria Puigdomenech, Xavier Navarro, Stefano Cobianchi
This study characterizes the impact of increasing-intensity treadmill exercise (iTR) on noradrenergic (NE) and serotonergic (5HT) modulation of neuropathic pain. Following sciatic nerve transection and repair (SNTR) rats developed significant mechanical and thermal hyperalgesia that was partially prevented by iTR performed during the first 2weeks after injury. Marked decrease in the expression of 5HT2A and α1A and β-, but not α2A adrenergic receptors in the spinal cord dorsal horn was associated to SNTR and recovered by iTR, particularly in lamina II...
January 2018: Experimental Neurology
https://www.readbyqxmd.com/read/28991373/novel-enriched-pathways-in-superficial-malignant-peripheral-nerve-sheath-tumors-mpnst-and-spindle-desmoplastic-melanomas-sdm
#20
George Jour, Nicole K Andeen, Rami Al -Rohil, Phyu P Aung, Meenakshi Mehrotra, Dzifa Duose, Benjamin Hoch, Zolt Argenyi, Rajyalakshmi Luthra, Ignacio I Wistuba, Victor G Prieto
Superficial malignant peripheral nerve sheath tumor (MPNST) is a rare, soft tissue neoplasm that shares morphological features and some molecular events with spindle and desmoplastic melanoma (SDM). Herein we sought to identify molecular targets for therapy using targeted RNA/DNA sequencing and gene expression of key immunological players. DNA and RNA from formalin-fixed, paraffin-embedded (FFPE) tissue were extracted and processed. Massive high-throughput deep parallel sequencing was performed using the Oncomine comprehensive panel enabling detection of relevant SNVs, CNVs, gene fusions, and indels from 143 unique genes on the Ion torrent sequencer for clinical trial research programs...
October 9, 2017: Journal of Pathology
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