Abstract:
:Neuregulins have been shown to play an important role in the development of the central nervous system, but their function in adult tissues is still unclear. We investigated the expression of the neuregulin receptors erbB3 and erbB4 in the adult rat brain by in situ hybridization histochemistry. Areas with considerable expression of erbB4 receptor mRNA include cortex, amygdala, hippocampus, medial habenula, reticular thalamic nucleus, several hypothalamic nuclei, subthalamic nucleus, substantia nigra pars compacta, and ventral tegmental area. Immunostaining for tyrosine hydroxylase and dopamine depletion by 6-hydroxydopamine indicate that erbB4 is expressed in dopamine neurons in the latter two nuclei. Substantial erbB4 expression is also present in clusters of cells along the ventral and medial border of the striatum/nucleus accumbens and in the subependymal zone along the lateral and olfactory ventricles (rostral migratory stream), suggesting a role for neuregulins in adult cell proliferation. In contrast, erbB3 mRNA is mostly expressed in white matter throughout the brain and in the ependyma of the ventral half of the third ventricle (tanycytes). These results demonstrate that expression of erbB3 and erbB4 receptors is widespread in the adult rat brain and suggest a function for neuregulins into adulthood.
journal_name
Exp Neuroljournal_title
Experimental neurologyauthors
Steiner H,Blum M,Kitai ST,Fedi Pdoi
10.1006/exnr.1999.7163keywords:
subject
Has Abstractpub_date
1999-10-01 00:00:00pages
494-503issue
2eissn
0014-4886issn
1090-2430pii
S0014-4886(99)97163-7journal_volume
159pub_type
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