An autoradiographic study of α1-adrenergic receptors in the brain of the Japanese quail (Coturnix coturnix japonica)

Jacques Balthazart, Gregory F. Ball, Bruce S. McEwen

Research output: Contribution to journalArticlepeer-review

Abstract

The neuroanatomical distribution of α1-adrenergic receptors was studied in Japanese quail by quantitative in vitro autoradiography using the specific antagonist [3H]prazosin as the ligand. The presence of saturable (Bmax <200 fmol/mg protein) high affinity (Kd < 0.12 nM) binding sites was detected by saturation analysis. High concentrations of [3H]prazosin binding sites were detected in the archistriatum/pars ventralis, the hippocampus, the cortex piriformis, the area corticoidea dorsolateralis, the dorsal thalamus, and the nucleus praetectalis. Lower concentrations were seen in the intercollicular nucleus, the lateral septum, and the posterior and tuberal hypothalamus. Very little binding was seen in the preoptic and anterior hypothalamic areas. The relatively high number of binding sites identified in the telencephalic structures agrees well with previous mammalian studies. This is in contrast with the pattern in the anterior hypothalamus where, in mammals, a number of nuclei have been reported to contain a high receptor density.

Original languageEnglish (US)
Pages (from-to)563-568
Number of pages6
JournalCell and Tissue Research
Volume258
Issue number3
DOIs
StatePublished - Dec 1989

Keywords

  • Coturnix coturnix japonica (Aves, Phasianiformes)
  • Japanese quail
  • Noradrenergic system
  • Prazosin
  • Quantitative autoradiography
  • α-Adrenergic receptor

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology
  • Cell Biology

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