Stress-induced changes of norepinephrine uptake sites in the locus coeruleus of C57BL/6J and DBA/2J mice: A quantitative autoradiographic study using [3H]-tomoxetine

Bang H. Hwang, P. E. Kunkler, B. J. Tarricone, Joseph N. Hingtgen, J. I. Nurnberger

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Inbred C57BL/6J (C57) and DBA/2J (DBA) mice were subjected to open- field evaluation and Porsolt swim test after restraint stress. Norepinephrine (NE) uptake sites in the locus coeruleus (LC) of these inbred mice were studied by using [3H]-tomoxetine. Results showed that naive C57 mice were more active in the open field and possessed more NE uptake sites in the LC than naive DBA mice. Previous work has shown that restraint decreases open field activity in C57 mice, but not DBA mice, whereas the present study has demonstrated that, after restraint stress, C57 mice spent more time immobile than DBA mice did in the forced swim test. Furthermore, in these stressed animals, NE uptake sites in the LC were greatly increased with consistently more uptake sites in C57 mice. Collectively, results of this study and the literature suggest that enhanced NE function in the LC of C57 mice is associated with their susceptibility to stress-induced behavioral depression.

Original languageEnglish (US)
Pages (from-to)151-154
Number of pages4
JournalNeuroscience Letters
Volume265
Issue number3
DOIs
StatePublished - Apr 23 1999

Keywords

  • Forced swim test
  • Inbred C57 mice
  • Locus coeruleus
  • Norepinephrine uptake sites
  • Restraint

ASJC Scopus subject areas

  • Neuroscience(all)

Fingerprint Dive into the research topics of 'Stress-induced changes of norepinephrine uptake sites in the locus coeruleus of C57BL/6J and DBA/2J mice: A quantitative autoradiographic study using [<sup>3</sup>H]-tomoxetine'. Together they form a unique fingerprint.

  • Cite this