Differential distribution of immunoreactivity in the adult rat spinal cord revealed by the monoclonal antibody, Py: a light and electron microscopic study.

Abstract:

:The monoclonal antibody Py has previously been shown to be a useful marker for subpopulations of neurons in the rat brain. However, the distribution of Py immunoreactivity in other regions of the CNS and PNS is not known. Here, we present a light and electron microscopic investigation into the distribution of Py immunoreactivity in the adult rat spinal cord, dorsal root ganglia, and peripheral nerves. Py immunoreactivity was associated with cytoskeletal elements in the cell body and dendrites of large-diameter neurons (particularly motoneurons, Clarke's nucleus neurons, and some dorsal root ganglion cells). Small-diameter neurons of lamina II (substantia gelatinosa) were Py negative. Py immunoreactivity was also detected in some populations of nerve fibers, notably axons located in the corticospinal tract, axons in the region of the white matter bordering the gray matter (presumably propriospinal axons), and also motor axons of the ventral root, but not in peripheral nerve. Dorsal roots were largely unstained. The present observations suggest a possible involvement of the Py antigen in the function or maintenance of the cytoskeleton of some populations of neurons and that the antibody may be a potentially useful tool for studying lesion-induced cytoskeletal alterations, particularly in alpha-motoneurons and Clarke's nucleus neurons.

journal_name

Exp Neurol

journal_title

Experimental neurology

authors

Brook GA,Spitzer C,Nacimiento W,Kouchtir-Devanne N,Woodhams PL,Noth J

doi

10.1006/exnr.1997.6509

subject

Has Abstract

pub_date

1997-07-01 00:00:00

pages

265-76

issue

1

eissn

0014-4886

issn

1090-2430

pii

S0014-4886(97)96509-2

journal_volume

146

pub_type

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