Retinoic acid negatively regulates GDNF and neurturin receptor expression and responsiveness in embryonic chicken sympathetic neurons.

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Doxakis E, Davies AM

Retinoic acid negatively regulates GDNF and neurturin receptor expression and responsiveness in embryonic chicken sympathetic neurons.

Mol Cell Neurosci. 2005 Aug;29(4):617-27.

PubMed ID

15950488 [ View in PubMed

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Abstract

Neurotrophins and members of the GDNF family influence the generation, differentiation and survival of sympathetic neurons during development. Neurotrophin receptor expression and responsiveness has previously been shown to be regulated by all-trans retinoic acid (RA) in embryonic chicken sympathetic neurons. To determine if RA also regulates responsiveness to GDNF family members and expression of their receptors, we studied the effect of treating cultures of these neurons at a stage when they survive in response to GDNF and neurturin. RA caused a dose-dependent decrease in the survival response to both GDNF and neurturin. Transcripts for the ligand-specifying receptors for GDNF and neurturin, GFRalpha-1 and GFRalpha-2, as well as the common signal transducing receptor Ret were all down-regulated by RA treatment in a dose-dependent manner. Transcripts for all three retinoic acid receptors RaRalpha, RaRbeta and RaRgamma as well as the enzymes involved in RA synthesis, Adh-1 and RALDH-2, RALDH-3, were present in both sympathetic targets and neurons. Studies with retinoic acid receptor agonists and antagonists revealed that the effects of RA on receptor expression were mediated mainly by RaRalpha. These findings implicate RA in regulating the actions of members of the GDNF family on developing sympathetic neurons.

DrugBank Data that Cites this Article

Drug Targets

Drug	Target	Kind	Organism	Pharmacological Action	Actions
Tretinoin	Retinal dehydrogenase 2	Protein	Humans	Unknown	Substrate	Details