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Role of endotoxin in the pathogenesis of critical illness polyneuropathy

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Abstract

Critical illness polyneuropathy (CIP) occurs in association with sepsis and multiple organ failure; however, little is known about the pathomechanisms of CIP and its therapy. In order to determine the parameters which interfere with development of CIP, electrophysiological investigations of peripheral nerves and biochemical measures were correlated to each other. The present study includes 20 consecutive patients in an intensive care unit developing severe sepsis or septic shock. Nerve conduction studies and electromyography were performed with occurring sepsis (day 1, 7, 14) and neurophysiological parameters were correlated with biochemical measures, especially indicators of infection and inflammation.

It was found that all patients developed neurophysiological signs of axonal motor polyneuropathy. There was a significant correlation between serum concentrations of endotoxin and interleukin-2 receptors (IL2-R) and reduction of the amplitude of the compound motor action potentials. Other clinical and biochemical parameters showed no significant correlations with neurophysiological data.

This finding apparently indicates that endotoxin damages nerve axons directly or indirectly, e.g. by activation of inflammatory cascades (IL2-R). Endotoxin appears to be an essential factor in the pathogenesis of CIP in sepsis, and therapeutic options neutralizing endotoxin may prevent development of CIP.

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Authors and Affiliations

  1. Dept. of Neurology, Medical School Hannover, Carl-Neuberg-Str. 1, 30625, Hannover, Germany

    B. Mohammadi MD, R. Dengler MD & J. Bufler MD

  2. Internal Medicine, Medical School Hannover, Carl-Neuberg-Str. 1, 30625, Hannover, Germany

    I. Schedel MD, K. Graf & A. Teiwes

  3. Biomathematics, Medical School Hannover, Carl-Neuberg-Str. 1, 30625, Hannover, Germany

    H. Hecker

  4. Anesthesiology, Medical School Hannover, Carl-Neuberg-Str. 1, 30625, Hannover, Germany

    B. Haameijer MD, D. Scheinichen MD & S. Piepenbrock MD

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  1. B. Mohammadi MD
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Correspondence to B. Mohammadi MD.

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Mohammadi, B., Schedel, I., Graf, K. et al. Role of endotoxin in the pathogenesis of critical illness polyneuropathy. J Neurol 255, 265–272 (2008). https://doi.org/10.1007/s00415-008-0722-0

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  • DOI: https://doi.org/10.1007/s00415-008-0722-0

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