Abstract
Sera from eight of 25 patients with chronic sensory neuropathy had high titers of antibodies to sulfatide and chondroitin sulfate C or both. Preclearing of patients' sera with either sulfatide or chondroitin sulfate C revealed that in four patients the antisulfatide antibodies crossreacted with chondroitin sulfate C. By indirect immunohistochemistry sera reactive to sulfatide only had a different staining pattern from those reactive to both sulfatide and chondroitin sulfate C. By direct immunohistochemistry we found immunoglobulins bound to nerve fibers only in patients with serum antibodies against both sulfatide and chondroitin sulfate C. Our study provides evidence that antibodies to sulfatide and to chondroitin sulfate C differ in their fine specificity and are present in 30% of patients with chronic sensory neuropathy.
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