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      Relapse of Neuromyelitis Optica Spectrum Disorder Associated with Intravenous Lidocaine

      case-report

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          Abstract

          Lidocaine unmasks silent symptoms and eases neuropathic pain in multiple sclerosis patients; however, the effects of lidocaine in neuromyelitis optica have never been reported. We describe the case of a 59-year-old Japanese woman with neuromyelitis optica spectrum disorder who developed optic neuritis 1 day after intravenous lidocaine injection for treating allodynia. Her symptom seemed to result from a relapse of neuromyelitis optica induced by lidocaine administration, and not because of the transient effects of intravenous lidocaine administration. The possibility that lidocaine administration results in relapse of neuromyelitis optica due to its immunomodulating effects cannot be ruled out.

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          Cytokine and chemokine profiles in neuromyelitis optica: significance of interleukin-6.

          Kimihito Arai, Satoshi Kuwabara, Akiyuki Uzawa … (2010)
          Neuromyelitis optica (NMO) is assumed to be immunologically distinct from multiple sclerosis (MS). Adequate studies about cytokines and chemokines in NMO have been lacking. To investigate the contribution of cytokines/chemokines in the pathogenesis of NMO. We measured 27 cytokines/chemokines and Th17 cell-associated cytokines in the cerebrospinal fluid (CSF) of 31 NMO, 29 MS and 18 other non-inflammatory neurological disorders patients. The serum levels of some cytokines/ chemokines were also measured. The correlations between clinical characteristics/laboratory findings and levels of cytokines/chemokines in NMO were examined. The CSF levels of interleukin (IL)-1 receptor antagonist, IL-6, IL-8, IL-13 and granulocyte colony-stimulating factor were significantly increased in NMO, while IL-9, fibroblast growth factor-basic, granulocyte macrophage colony-stimulating factor, macrophage inflammatory protein-1-beta and tumor necrosis factor-alpha were increased in MS. IL-10 and interferon-gamma-inducible protein-10 were elevated in NMO and MS. In serum analyses, only the IL-6 level showed significant elevation in NMO. The CSF IL-6 level had a significant correlation with the CSF glial fibrillary acidic protein level and CSF cells, and a weak correlation with anti-aquaporin-4 antibody titers. Different immunological status and pathophysiologies exist between NMO and MS, and IL-6 may play important roles in the pathogenesis of NMO.
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            Nitric oxide donors reversibly block axonal conduction: demyelinated axons are especially susceptible.

            Sabrina R Kapoor, Alexander J Redford, Jeffrey Smith (1997)
            Diseases such as multiple sclerosis and Guillain-Barré syndrome are characterized not only by widespread loss of myelin from nerve fibres, but also by widespread inflammation in the central and peripheral nervous systems, respectively. While the demyelination alone is sufficient to block conduction and thereby cause symptoms, there is increasing evidence that the inflammation may also contribute significantly to the conduction block, although the mechanisms are not understood. Nitric oxide is an important inflammatory mediator which is elevated within the central nervous system in multiple sclerosis and which can be experimentally applied to tissues using nitric oxide donors. We report that such compounds cause reversible conduction block in both normal and demyelinated axons of the central and peripheral nervous systems. Notably, conduction in demyelinated and early remyelinated axons is particularly sensitive to block by nitric oxide, so that at lower concentrations, including those expected at sites of inflammation, demyelinated axons are selectively affected. We therefore propose that inflammation may directly cause symptoms via nitric oxide release, and that the inhibition of such release may open a new therapeutic avenue for demyelinating disease.
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              Irreversible conduction block in isolated nerve by high concentrations of local anesthetics.

              Laurie Lambert, Gary Strichartz, Sylvie D. Lambert (1994)
              Delivery of large doses of local anesthetics for spinal anesthesia by repeated injections or continuous infusion could expose the cauda equina to concentrations of drug that may be neurotoxic per se. We studied this possible neurotoxic effect by assessing recovery from conduction blockade of desheathed peripheral nerves after exposure to some of the local anesthetic solutions commonly used for spinal anesthesia. The reversibility of conduction blockade was studied in desheathed bullfrog sciatic nerves, using the sucrose-gap method for recording compound action potentials, before and during exposure to local anesthetics and during drug washout. The nerves were exposed for 15 min to 5% or 1.5% lidocaine, with or without 7.5% dextrose; 0.5% tetracaine; or 0.75% bupivacaine (the latter two without dextrose). Some nerves were also bathed in 7.5% dextrose (without local anesthetic) or in 0.06% tetracaine, which in this preparation is equipotent to 5% lidocaine. After 15 min in the drug, the nerves were washed for 2-3 h and soaked in Ringer's solution overnight. Nerves exposed only to Ringer's solution served as controls. We also studied neuronal uptake and washout of radiolabeled lidocaine. Exposure of nerves to 5% lidocaine, with or without 7.5% dextrose, or to 0.5% tetracaine resulted in irreversible total conduction blockade, whereas 1.5% lidocaine or 0.75% bupivacaine caused 25-50% residual block after the 2-3 h wash. Nerves exposed to Ringer's solution, 7.5% dextrose or 0.06% tetracaine had 0-10% residual block after 2-3 h wash. The action potential of all nerves declined after overnight soak to between 30-60% of the control value, except for those nerves exposed to 5% lidocaine or 0.5% tetracaine, which showed no activity. Exposure to 5% lidocaine for periods of only 4-5 min produced total, irreversible loss of conduction. The uptake by and washout of radiolabeled lidocaine from the nerves indicate that the maximum amount of residual drug after 2-4 min of exposure to 5% lidocaine and a 3-h wash should cause at most only 50% conduction block. Solutions of 5% lidocaine and 0.5% tetracaine that have been associated with clinical cases of cauda equina syndrome after continuous spinal anesthesia caused irreversible conduction block in desheathed amphibian nerve. Whether these in vitro actions also occur in mammalian nerves in vivo is an important, clinically relevant question now under investigation in our laboratory.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Case Report Med
                Journal ID (publisher-id): CRIM
                Title: Case Reports in Medicine
                Publisher: Hindawi Publishing Corporation
                ISSN (Print): 1687-9627
                ISSN (Electronic): 1687-9635
                Publication date (Print): 2011
                Publication date (Electronic): 11 May 2011
                Volume: 2011
                Electronic Location Identifier: 405837
                Affiliations
                1Department of Neurology, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
                2Department of Anaesthesiology, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
                Author notes

                Academic Editor: Ting Fan Leung

                Article
                DOI: 10.1155/2011/405837
                PMC ID: 3099211
                PubMed ID: 21629806
                SO-VID: f899b619-ac42-4a68-b6aa-06706b5680cf
                Copyright © Copyright © 2011 Akiyuki Uzawa et al.
                License:

                This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                Date received : 7 January 2011
                Date accepted : 11 March 2011
                Categories
                Subject: Case Report

                ScienceOpen disciplines: Medicine
                Data availability:
                ScienceOpen disciplines: Medicine

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