Abstract
The transcriptional activator retinoic acid (RA) is a regulator of neural development and regeneration. Synergistic effects with brain-derived neurotrophic factor suggested that RA influences neurotrophin signaling. To test this hypothesis RA was administered systemically to E17 chick embryos, and retinas were prepared 12h and 24h later to measure mRNA or protein expression. While there was no significant influence on activation of Akt, CREB and STAT-3, RA-treatment caused elevated levels of Erk-phosphorylation, a kinase involved in Trk signaling. A small but significant increase in the expression of TrkB mRNA and protein was observed but no significant change in TrkA, TrkC and p75 expression.
Published Version
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