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  • Title: Anterograde transport of horseradish-peroxidase conjugated isolectin B4 from Griffonia simplicifolia I in spinal primary sensory neurons of the rat.
    Author: Wang HF, Robertson B, Grant G.
    Journal: Brain Res; 1998 Nov 16; 811(1-2):34-9. PubMed ID: 9804881.
    Abstract:
    Anterograde transport of the isolectin B4 from Griffonia simplicifolia I (B4) conjugated to horseradish peroxidase (HRP) was investigated in rat somatic and visceral primary sensory neurons at different spinal levels. Injection of B4-HRP into the L5 dorsal root ganglion (DRG) resulted in labelling in the sural nerve, but not in the gastrocnemius nerves. Free nerve endings and lanceolate-like nerve endings were labelled in the lateral hindpaw skin. Labelled fibres were also observed in the greater splanchnic nerve following B4-HRP injection into the T10-11 DRGs. Electron microscopic examination of the labelled nerves showed that B4-HRP labelled exclusively unmyelinated axons. In the spinal cord, labelling was observed in the superficial dorsal horn, and additionally, although much more sparse, in the medial and lateral collateral projections following injections into the T10-11 DRGs. The results suggest that B4-HRP should be a suitable anterograde tracer of unmyelinated cutaneous and splanchnic but not muscle primary afferent fibres.
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