Neurotrophin receptors in the geniculate ganglion.

Abstract

We examined the distribution of the high affinity neurotrophin receptors (trkA, trkB, and trkC) in the rat geniculate ganglion. Previous work had shown that during early (prenatal) development, trkB and its two ligands, BDNF and NT-4/5, were most important for survival of almost all neurons. Using nested polymerase chain reaction (PCR), we showed that trkA, trkB, and trkC transcripts were expressed, and the mRNAs for trkB and trkC were more abundant than that for trkA. We modified and improved the method for direct reverse transcription in situ PCR and localized trkB mRNA in approximately one third of the neurons in the ganglion. Immunohistochemical data confirmed that approximately the same fraction of neurons was immunoreactive with antibody vs. trkB, and an approximately equal fraction was immunoreactive with trkC antibody. These results are consistent with the notion that both BDNF/trkB and NT-3/trkC play important roles in maintenance of the geniculate ganglion neurons and possibly the peripheral taste system in the young postnatal rat.

• Authors: T T Cho, A I Farbman
• Journal: Brain research. Molecular brain research (Brain Res Mol Brain Res) Vol. 68 Issue 1-2 Pg. 1-13 (May 07 1999) ISSN: 0169-328X [Print] Netherlands
• PMID: 10320778 (Publication Type: Journal Article, Research Support, U.S. Gov't, P.H.S.)
• Copyright: Copyright 1999 Elsevier Science B.V.

Chemical References

• Receptor, Nerve Growth Factor
• Receptors, Nerve Growth Factor

Topics

• Animals
• Female
• Geniculate Ganglion (chemistry)
• Immunohistochemistry
• Male
• Rats
• Rats, Sprague-Dawley
• Receptor, Nerve Growth Factor
• Receptors, Nerve Growth Factor (analysis)
• Reverse Transcriptase Polymerase Chain Reaction
• Taste (physiology)