Diurnal variations in rat posterior pituitary catecholamine levels.

Abstract:

:Diurnal variations, ranging over a twofold difference in concentrations of dopamine, norepinephrine and epinephrine, occur in the rat posterior pituitary gland during a 24-hour period. Highest catecholamine concentrations were seen during daylight hours and low levels reached a nadir 5 h after the onset of darkness. Dopamine concentrations rapidly returned to high levels at the onset of the daylight period, whilst the increase in norepinephrine and epinephrine concentrations was delayed. These diurnal variations in catecholamine content may reflect their modulation of neural lobe peptide secretion.

journal_name

Neuroendocrinology

journal_title

Neuroendocrinology

authors

Barden N,Chevillard C,Saavedra JM

doi

10.1159/000123292

subject

Has Abstract

pub_date

1982-02-01 00:00:00

pages

148-50

issue

2

eissn

0028-3835

issn

1423-0194

journal_volume

34

pub_type

杂志文章