Abstract
The fibrobast growth factor (FGF) receptor family consists of four members, FGFR-1, FGFR-2, FGFR-3 and FGFR-4, that are closely related receptor tyrosine kinases. We examined the expression of rat FGFR-4 mRNA in the brain by in situ hybridization and compared it with that of the mRNAs for other FGF receptors. In contrast with FGFR-1, FGFR-2 and FGFR-3 mRNAs which are expressed widely in the brain, the FGFR-4 mRNA in the brain is expressed preferentially in the medial habenular nucleus neurons. The present finding indicates that FGFR-4 has a function specific to the medial habenular nucleus.
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