Acute stress increases neuropeptide Y mRNA within the arcuate nucleus and hilus of the dentate gyrus

Cheryl Conrad, B. S. McEwen

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

The effects acute restraint stress on neuropeptide Y (NPY) mRNA expression were determined within the dentate gyrus and arcuate nucleus, where the effects of adrenal steroid action were previously reported. Adult male rats were exposed to 1 h of restraint stress and then sacrificed immediately, 6 h, or 24 h later. Controls were undisturbed. Stress increased NPY mRNA levels in both the arcuate nucleus and in the hilar region of the hippocampus with different time courses. NPY mRNA increased in the arcuate at 24 h, but not earlier, as determined by film autoradiography. Single cell grain analysis was performed in the dentate gyrus hilus because the NPY mRNA was heterogeneously distributed and revealed that the number of cells expressing NPY mRNA increased 6 h after stress, returning to control levels within 24 h. These results fit with previously reported effects of adrenal steroids modulating arcuate nucleus NPY expression through the adrenal steroid Type II receptors. In the hilus where adrenal steroid Type I receptors have been reported to suppress NPY mRNA levels, the effect of stress is in the opposite direction to that of adrenal steroid action and a more complex regulation of NPY expression is indicated. Copyright (C) 2000 Elsevier Science B.V.

Original languageEnglish (US)
Pages (from-to)102-109
Number of pages8
JournalMolecular Brain Research
Volume79
Issue number1-2
DOIs
StatePublished - Jun 23 2000

Fingerprint

Arcuate Nucleus of Hypothalamus
Neuropeptide Y
Dentate Gyrus
Messenger RNA
Steroids
Single-Cell Analysis
Cerebellar Nuclei
Autoradiography
Hippocampus
Cell Count

Keywords

  • Arcuate nucleus
  • Dentate gyrus
  • Hippocampus
  • mRNA, Messenger ribonucleic acid
  • Neuropeptide Y
  • NPY, Neuropeptide Y
  • RIA, Radioimmunoassay
  • Stress

ASJC Scopus subject areas

  • Molecular Biology
  • Cellular and Molecular Neuroscience

Cite this

Acute stress increases neuropeptide Y mRNA within the arcuate nucleus and hilus of the dentate gyrus. / Conrad, Cheryl; McEwen, B. S.

In: Molecular Brain Research, Vol. 79, No. 1-2, 23.06.2000, p. 102-109.

Research output: Contribution to journalArticle

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