Effect of peripheral 2-DG on opioid and neuropeptide Y gene expression

Silvia Q. Giraudo, Eun Mee Kim, Martha K. Grace, Charles J Billington, Allen S Levine

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

It is well known that 2-Deoxy-D-glucose (2-DG) blocks intracellular utilization of glucose and increases food intake. The aim of the present study was to determine whether administration of 2-DG alters gene expression of the orexigenic peptides, neuropeptide Y (NPY) and endogenous opioids, in the arcuate nucleus of the hypothalamus (ARC). Male Sprague-Dawley rats were injected peripherally (i.p.) with 2-DG (200 or 400 mg/kg body weight) and were sacrificed at 2 or 6 h post injection. Half of the animals were given ad libitum access to food whereas the other half of the animals were food- deprived. 2-DG increased food intake fourfold compared to saline injected animals, but did not affect NPY mRNA levels after 2 h. Messenger RNA levels of ProDynorphin (proDYN), but not pro-opiomelanocortin (POMC) nor proEnkephalin (proENK) were significantly decreased 2 h after 2-DG injection. Administration of 400 mg/kg of 2-DG increased mRNA levels of NPY in the arcuate nucleus after six h, but only in those animals not receiving food.

Original languageEnglish (US)
Pages (from-to)136-140
Number of pages5
JournalBrain Research
Volume792
Issue number1
DOIs
StatePublished - May 4 1998

Keywords

  • 2-deoxy-D-glucose (2-DG)
  • Neuropeptide Y (NPY)
  • Periphery
  • Pro- opiomelanocortin (POMC)
  • ProDynorphin (proDYN)
  • ProEnkephalin (proENK)

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