Neurotrophin-3 and TrkC-immunoreactive neurons in rat dorsal root ganglia correlate by distribution and morphology |
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Authors: | Colin Chen Dr Xin-Fu Zhou Robert A Rush |
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Institution: | (1) Department of Human Physiology and Centre for Neuroscience, Flinders University of South Australia, G.P.O. Box 2100, 5001 Adelaide, Australia;(2) Growth Factor Laboratory, Department of Human Physiology and Centre for Neuroscience, Flinders Medical Centre, G.P.O. Box 2100, 5001 Adelaide, Australia |
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Abstract: | Previous studies have shown that a subpopulation of large dorsal root ganglion neurons contains neurotrophin-3 (NT3)-like
immunoreactivity. It is not known, however, whether these NT3 immunoreactive neurons also express the high affinity receptor
for NT3, trkC. In the present study, the distribution and morphology of trkC immunoreactive neurons have been correlated with
those of NT3 immunoreactive neurons in the dorsal root ganglia. Size and segmental distributions of both antigens indicate
that they are present in the same group of large sensory neurons. Almost twice the number of these neurons are present in
the cervical and lumbar spinal ganglia than in the thoracic. Co-localization study indicates that 94% of NT3 immunoreactive
neurons express trkC. Our findings support the proposal that NT3 in these neurons is derived from their peripheral targets
rather than synthesized in situ.
Special issue dedicated to Dr. Hans Thoenen. |
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Keywords: | Neurotrophin 3 TrkC dorsal root ganglion sensory neuron immunohistochemistry |
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