Fig. 8.

Colocalization of TH-ir axons with p75-ir glia and nerve fibers in ipsilateral DRG 1 week after sciatic nerve lesion. Pairs of micrographs (1, 2; 3,4; 5, 6) are each of the same section using different filters. Large arrowheads in1, 3, and 5 indicate TH-ir nerve fibers; small arrowheads in 2 indicate p75-ir satellite cells associated with a large neuron surrounded by TH-ir nerve terminals (1); arrowheads in4 indicate nerve bundles immunoreactive for p75 in the same site as TH-ir fibers (3); arrowheads in6 indicate p75-ir colocalized with a TH-ir nerve fiber. Scale bar (shown in 1), 100 μm. In 1,3, and 5, which show TH-ir fibers, significant autofluorescence of sensory neurons was observed with the filter for FITC.