The rat vasoactive intestinal polypeptide cyclic AMP response element regulates gene transcriptional responses differently in neonatal and adult rat sensory neurons.
We studied the ability of the rat vasoactive intestinal polypeptide (VIP) cyclic AMP responsive element (CRE) to regulate reporter gene expression through a c-fos promoter in rat sensory neurons transfected in culture by plasmid microinjection. The CRE enhanced the synergistic response of the promoter to combined potassium-evoked depolarisation and forskolin treatment in neonatal but not adult rat neurons. This corresponds to endogenous VIP expression which is induced synergistically by the same stimuli in neonatal but not adult rat neurons. We conclude that VIP expression in sensory neurons, which is induced by axotomy in vivo, could be regulated through the CRE.
Dobson
S P
SP
MRC Brain Metabolism Unit, Royal Edinburgh Hospital, Morningside Park, UK.
Quinn
J P
JP
Morrow
J A
JA
Mulderry
P K
PK
D000375:Aging / Q000502:physiology*; D000818:Animals; D000831:Animals, Newborn / Q000502:physiology*; D001483:Base Sequence; D015500:Chloramphenicol O-Acetyltransferase / Q000235:genetics / Q000378:metabolism; D005576:Colforsin / Q000494:pharmacology; D017362:Cyclic AMP Response Element-Binding Protein / Q000502:physiology*; D004594:Electrophysiology; D017930:Genes, Reporter; D008969:Molecular Sequence Data; D009475:Neurons, Afferent / Q000502:physiology*; D015345:Oligonucleotide Probes / Q000235:genetics; D011188:Potassium / Q000494:pharmacology; D051381:Rats; D014158:Transcription, Genetic / Q000502:physiology*; D014660:Vasoactive Intestinal Peptide / Q000494:pharmacology*
D017362:Cyclic AMP Response Element-Binding Protein; D015345:Oligonucleotide Probes; D005576:Colforsin; D014660:Vasoactive Intestinal Peptide; D015500:Chloramphenicol O-Acetyltransferase; D011188:Potassium