Dietary supplementation with uridine-5′-monophosphate (UMP), a membrane phosphatide precursor, increases acetylcholine level and release in striatum of aged rat

Lei Wang, Meredith A. Albrecht, Richard J. Wurtman

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The biosynthesis of brain membrane phosphatides, e.g., phosphatidylcholine (PtdCho), may utilize three circulating compounds: choline, uridine (a precursor for UTP, CTP, and CDP-choline), and a PUFA (e.g., docosahexaenoic acid); moreover, oral administration of the uridine source uridine-5′-monophosphate (UMP) can significantly increase levels of the phosphatides throughout the rodent brain. Since PtdCho can provide choline for acetylcholine (ACh) synthesis, we determined whether UMP administration also affects ACh levels in striatum and striatal extracellular fluid, in aged and young rats. Among aged animals consuming a UMP-containing diet (2.5%, w/w) for 1 or 6 weeks, baseline ACh levels in striatal dialysates rose from 73 fmol/min to 148 or 197 fmol/min (P < 0.05). Consuming a lower dose (0.5%) for 1 week produced a smaller but still significant increase (from 75 to 92 fmol/min, P < 0.05), and elevated striatal ACh content (by 16%; P < 0.05). Dietary UMP (0.5%, 1 week) also amplified the increase in ACh caused by giving atropine (10 μM in the aCSF); atropine alone increased ACh concentrations from 81 to 386 fmol/min in control rats and from 137 to 680 fmol/min in those consuming UMP (P < 0.05). Young rats eating the UMP-containing diet exhibited similar increases in basal ECF ACh (from 105 to 118 fmol/min) and in the increase produced by atropine (from 489 to 560 fmol/min; P < 0.05). These data suggest that giving a uridine source may enhance some cholinergic functions, perhaps by increasing brain phosphatide levels.

Original languageEnglish (US)
Pages (from-to)42-48
Number of pages7
JournalBrain Research
Volume1133
Issue number1
DOIs
StatePublished - Jan 16 2007
Externally publishedYes

Fingerprint

Uridine Monophosphate
Dietary Supplements
Acetylcholine
Phospholipids
Membranes
Corpus Striatum
Uridine
Atropine
Choline
Phosphatidylcholines
Brain
Cytidine Diphosphate Choline
Diet
Cytidine Triphosphate
Uridine Triphosphate
Docosahexaenoic Acids
Dialysis Solutions
Extracellular Fluid
Cholinergic Agents
Oral Administration

Keywords

  • Acetylcholine
  • Aged rat
  • CDP-choline
  • Microdialysis
  • Phosphatidylcholine
  • Uridine

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

Cite this

Dietary supplementation with uridine-5′-monophosphate (UMP), a membrane phosphatide precursor, increases acetylcholine level and release in striatum of aged rat. / Wang, Lei; Albrecht, Meredith A.; Wurtman, Richard J.

In: Brain Research, Vol. 1133, No. 1, 16.01.2007, p. 42-48.

Research output: Contribution to journalArticle

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