The Behavioral and Immunological Effect of GM-1 Ganglioside on Nerve Root Regeneration Following C5 Nerve Root Avulsion in a Rat Model

ABSTRACT

Preganglionic nerve root avulsion precludes sensory return, but motor regeneration is possible with sparing of motoneurons. The effect of GM-1 ganglioside treatment was studied with parallel evaluation of the autoimmune response. Rats (n = 64) received injections of either GM-1 ganglioside or saline for 30 days following either C5 root avulsion or a hemilaminectomy control. The Bertelli grooming test assessed functional return. Before sacrifice at 5 months, serum was collected for enzyme-linked immunoabsorbent assay testing. Only 44% of the rats treated with ganglioside had a good functional outcome compared with 50% for controls. Although 17% of the rats developed anti GM-1 antibodies, there was no functional or histological evidence of neuropathy in any of the rats. We conclude that ganglioside treatment did not enhance recovery from peripheral nerve injury. Although an immune response was present in some rats, no overt signs of neuropathy were observed.

KEYWORDS

GM-1 ganglioside - nerve root avulsion - Bertelli grooming test - ELISA

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