Distribution and daily variations of PACAP in the chicken brain

R. Józsa, A. Somogyvári-Vigh, D. Reglodi, T. Hollósy, A. Arimura

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Levels of PACAP38 were measured in different areas of the chicken brain under various lighting conditions by radioimmunoassay (RIA). Selected groups of animals were maintained under light for 14 h alternating with 10 h of darkness (LD), reversed lighting conditions (DL) and constant light (LL) or constant dark (DD). Daily variations of PACAP levels were observed in the brainstem, diencephalon, telencephalon and retina. In the brainstem and diencephalon, levels of PACAP increased during subjective nighttime, except in the DL group where levels were elevated between 15-21 h. In the telencephalon, the lowest level of PACAP was measured between 12-21 h except in the DL group where two peaks occurred at 18 and 03 h. In the retina, all 4 groups showed a similar level and pattern, with lowest levels during midday hours. No daily variation was observed in the pineal gland. According to the present observations, it is suggested that PACAP levels differ in several areas of the chicken brain under various lighting conditions and photic stimuli do not appear to be the main regulators of the circadian variations of PACAP.

Original languageEnglish
Pages (from-to)1371-1377
Number of pages7
JournalPeptides
Volume22
Issue number9
DOIs
Publication statusPublished - 2001

Fingerprint

Pituitary Adenylate Cyclase-Activating Polypeptide
Chickens
Brain
Lighting
Diencephalon
Telencephalon
Brain Stem
Retina
Light
Pineal Gland
Darkness
Radioimmunoassay
Animals

Keywords

  • Chicken
  • Daily variation
  • PACAP
  • Radioimmunoassay

ASJC Scopus subject areas

  • Biochemistry
  • Endocrinology
  • Physiology
  • Cellular and Molecular Neuroscience

Cite this

Distribution and daily variations of PACAP in the chicken brain. / Józsa, R.; Somogyvári-Vigh, A.; Reglodi, D.; Hollósy, T.; Arimura, A.

In: Peptides, Vol. 22, No. 9, 2001, p. 1371-1377.

Research output: Contribution to journalArticle

Józsa, R. ; Somogyvári-Vigh, A. ; Reglodi, D. ; Hollósy, T. ; Arimura, A. / Distribution and daily variations of PACAP in the chicken brain. In: Peptides. 2001 ; Vol. 22, No. 9. pp. 1371-1377.
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