Journal of Neuroscience, Vol 6, 1302-1307, Copyright © 1986 by Society for Neuroscience
Androgen receptor levels in cranial nerve nuclei and tongue muscles in rats
WH Yu and MY McGinnis
Specific in vitro binding of 3H-methyltrienolone (R1881) was demonstrated
in 100,000 X g supernatant (cytosol) of hypoglossal, facial, and cochlear
nuclei and tongue muscles of adult rats. Binding sites in these cranial
nerve nuclei and tongue muscles were of high affinity, limited capacity,
with steroid specificity; and they were capable of translocation to the
cell nuclei in vivo. Accordingly, an androgen receptor system with
properties very much akin to the androgen receptors described in the
forebrain limbic regions has been quantitatively demonstrated for the first
time in brain stem nuclei. Because of its widespread presence in neurons of
the brain stem and spinal cord, androgen receptors may have important roles
in regulation of neuron physiology beyond the sphere of reproductive
function, including mediating androgen effects on regeneration of the
hypoglossal nerve reported previously.