Journal of Neuroscience, Vol 1, 126-131, Copyright © 1981 by Society for Neuroscience
The immunocytochemical localization of tyrosine hydroxylase within rat sympathetic neurons that release acetylcholine in culture
D Higgins, L Iacovitti, TH Joh and H Burton
In vitro populations of neurons dissociated from the superior cervical
ganglion of the rat embryo can acquire many of the properties of
cholinergic neurons and yet retain some of the characteristics of
adrenergic neurons. To determine whether one neuron can stably express
properties of two transmitter systems, identified neurons were
characterized by both immunocytochemical and electrophysiological methods.
It was found that more than 90% of the neurons that formed functional
cholinergic synapses had tyrosine hydroxylase within their cytoplasm.
Furthermore, this mixed phenotypic expression persisted for more than 1
month. It is concluded that, under certain conditions in vitro, most
neurons from the superior cervical ganglion have at least the potential for
dual function.