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2,5-Hexanedione neuropathy is associated with the covalent crosslinking of neurofilament proteins

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Neurochemical Pathology

Abstract

Protein composition in different segments along nerves from rats intoxicated with 2,5-hexanedione (HD) was analyzed by sodium dodecyl sulfate polyacrylamide gel electrophoresis and by immunoblotting, using monoclonal antibodies specific for each of the three neurofilament polypeptide components (H, M, and L). Comparison with nerve protein extracts from normal (control) rats revealed a disappearance of the largest neurofilament polypeptide (H), accompanied by accumulation of higher-molecular-weight products that were immunoreactive with H-specific antibodies. Both the extent of this crosslinking and its localization in particular portions of peripheral nerves showed a correlation with HD dosage and with the known progression of ultrastructural features during HD-induced neuropathy. Similar changes were not detected for the M and L neurofilament components.

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Authors and Affiliations

  1. Laboratory of Neuropathology, Department of Pathology and Laboratory Medicine, University of Pennsylvania Medical School, 19104-6079, Philadelphia, PA

    Martin J. Carden, Virginia M -Y. Lee & William W. Schlaepfer

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  1. Martin J. Carden
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  2. Virginia M -Y. Lee
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  3. William W. Schlaepfer
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Carden, M.J., Lee, V.M.Y. & Schlaepfer, W.W. 2,5-Hexanedione neuropathy is associated with the covalent crosslinking of neurofilament proteins. Neurochemical Pathology 5, 25–35 (1986). https://doi.org/10.1007/BF03028034

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  • DOI: https://doi.org/10.1007/BF03028034

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