Diurnal rhythms of immunoreactive melatonin in the aqueous humor and serum of male pigmented rabbits

Hing Sing Yu, Richard W. Yee, Kimberly A. Howes, Russel J. Reiter

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Using specific radioimmunoassays, melatonin was quantified in the aqueous humor and serum of male pigmented rabbits adapted to 12L:12D with lights on at 06.00 h. Melatonin concentrations in the aqueous humor at 08.00 and 16.00 h were similar (mean: 5.23 pg/ml) and significantly lower than those at 22.00 and 01.00 h (mean: 22.06 pg/ml). A parallel rhythm was also demonstrated in the serum with higher melatonin concentrations (daytime mean: 75.26 pg/ml; nighttime mean: 168.94 pg/ml). We propose that the aqueous melatonin rhythm is associated with the rhythmic change in aqueous flow.

Original languageEnglish (US)
Pages (from-to)309-314
Number of pages6
JournalNeuroscience Letters
Volume116
Issue number3
DOIs
StatePublished - Aug 24 1990

Keywords

  • Aqueous humor
  • Diurnal
  • Melatonin
  • Rabbit
  • Rhythm
  • Serum

ASJC Scopus subject areas

  • Neuroscience(all)

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