Developmental age-dependent upregulation of choline acetyltransferase and vesicular acetylcholine transporter mRNA expression in neonatal rat septum by nerve growth factor.
We examined the effect of intraventricular injection of nerve growth factor (NGF) on the choline acetyltransferase (ChAT) and vesicular acetylcholine transporter (VAChT) mRNA expression in the septa of neonatal rats. Rat pups were injected with 2.5 S NGF or cytochrome-c (control) on postnatal days (PN) 4 and 18, and sacrificed 3 days after injections for analysis of ChAT and VAChT mRNA levels by dot-blot hybridization of total septal RNA. In the NGF-treated pups, the ChAT and VAChT mRNA levels were elevated 3- and 2-fold, respectively, at PN7, and 1.8- and 1.3-fold at PN21. These results indicate that (1) NGF upregulates the expression of both ChAT and VAChT genes, (2) NGF has a greater effect on the expression of ChAT mRNA than VAChT mRNA, and (3) the effect of exogenous NGF on the expression of both genes diminishes with developmental age.
Tian
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Department of Molecular and Cellular Physiology, University of Cincinnari College of Medicine, OH 45267-0576, USA.
Sun
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Suszkiw
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JB
D000367:Age Factors; D000818:Animals; D000831:Animals, Newborn / Q000254:growth & development*; D002352:Carrier Proteins / Q000378:metabolism*; D002795:Choline O-Acetyltransferase / Q000502:physiology*; D026901:Membrane Transport Proteins; D009414:Nerve Growth Factors / Q000502:physiology*; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats; D012686:Septal Nuclei / Q000187:drug effects* / Q000201:enzymology; D015854:Up-Regulation / Q000502:physiology*; D050494:Vesicular Acetylcholine Transport Proteins; D033921:Vesicular Transport Proteins
D002352:Carrier Proteins; D026901:Membrane Transport Proteins; D009414:Nerve Growth Factors; D012333:RNA, Messenger; C493461:Slc18a3 protein, rat; D050494:Vesicular Acetylcholine Transport Proteins; D033921:Vesicular Transport Proteins; D002795:Choline O-Acetyltransferase