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16862565

Source:http://linkedlifedata.com/resource/pubmed/id/16862565

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pubmed-article:16862565pubmed:abstractTextDespite the general capacity of peripheral nervous system to regenerate, peripheral nerve injury is often followed by incomplete recovery of function, sometimes with the burden of neuropathic pain. The mechanisms of both regeneration and nociception have not been clarified, but it is known that inflammatory reactions are involved. Cu/Zn-superoxide dismutase (SOD1) is an important scavenger protein that acts against oxidative stress. It has been shown to play an important role in apoptosis and inflammation. The aim of this study was to examine the role of SOD1 overexpression in peripheral nerve regeneration and neuropathic pain-related behavior in mice. Sciatic nerves of SOD1-overexpressing and FVB/N wild type-mice were transected and immediately resutured. Evaluation of motor and sensory function and autotomy was carried out during 4 weeks of followup. We found markedly worse sciatic function index outcome as well as more significant atrophy of denervated muscles in SOD1-overexpressing animals compared with wild type. Autotomy was markedly worse in SOD1 transgenic mice than in wild-type animals. Histological evaluation revealed that the intensity of regeneration features, including numbers of GAP-43-positive growth cones, Schwann cells, and macrophages in the distal stump of the transected nerve, was also decreased in transgenic mice. Neuroma formation at the injury site was significantly more prominent in this group. Taken together, our findings suggest that SOD1 overexpression is deleterious for nerve regeneration processes and aggravates neuropathic pain-like state in mice. This can be at least partially ascribed to disturbed inflammatory reactions at the injury site.lld:pubmed
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pubmed-article:16862565pubmed:copyrightInfoCopyright 2006 Wiley-Liss, Inc.lld:pubmed
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pubmed-article:16862565pubmed:year2006lld:pubmed
pubmed-article:16862565pubmed:articleTitleOverexpression of copper/zinc-superoxide dismutase in transgenic mice markedly impairs regeneration and increases development of neuropathic pain after sciatic nerve injury.lld:pubmed
pubmed-article:16862565pubmed:affiliationDepartment of Child Neurology and Epileptology, The Children's Memorial Health Institute, Warsaw, Poland. Kotulskakasia@poczta.onet.pllld:pubmed
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pubmed-article:16862565pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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