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Differential regulation of p75 and trkB mRNA expression after depolarizing stimuli or BDNF treatment in basal forebrain neuron cultures
Author(s) -
Elliott Robert C.,
Black Ira B.,
Dreyfus Cheryl F.
Publication year - 2001
Publication title -
journal of neuroscience research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.72
H-Index - 160
eISSN - 1097-4547
pISSN - 0360-4012
DOI - 10.1002/jnr.1199
Subject(s) - tropomyosin receptor kinase b , depolarization , basal forebrain , low affinity nerve growth factor receptor , neurotrophin , brain derived neurotrophic factor , neuroscience , biology , tropomyosin receptor kinase a , forebrain , neurotrophic factors , microbiology and biotechnology , neuron , medicine , receptor , endocrinology , chemistry , central nervous system , biochemistry
Abstract Extensive evidence suggests that BDNF regulates neural function and architecture after depolarization. Expression of BDNF is increased after depolarization, and the ability of BDNF to modulate synaptic function is well documented. To further investigate BDNF signaling after activity, we analyzed the effects of depolarization or BDNF treatment on receptor mRNA expression in cultured basal forebrain neurons. Levels of mRNA coding for the cognate BDNF receptor, trkB, as well as the common neurotrophin receptor, p75, were quantitated simultaneously using a sensitive solution hybridization technique. Depolarization or BDNF treatment increased p75 mRNA expression 94% and 195%, respectively. In contrast, trkB message decreased 23% after depolarization but was unchanged by BDNF treatment. Together, these changes resulted in significant increases in the p75/trkB ratio after depolarization or BDNF treatment that could alter BDNF binding or signal transduction. J. Neurosci. Res. 66:83–88, 2001. © 2001 Wiley‐Liss, Inc.