Effect of Atenolol on Nocturnal Sleep and Temperature in young Men: Reversal by Pharmacological Doses of Melatonin

Cameron J. Van Den Heuvel*, Kathryn J. Reid, Drew Dawson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

77 Scopus citations

Abstract

To examine the physiological role of melatonin in sleep, nocturnal melatonin secretion was suppressed using 100 mg oral atenolol in two studies. In Study 1, nocturnal sleep was recorded in 8 young men over 4 nights. Subjects received atenolol on one of the last 2 nights and showed significantly increased total wake time (TWT) and wakefulness after sleep onset (WASO), as well as decreased REM sleep and slow-wave sleep (SWS). When melatonin (total 5 mg) was given after atenolol on the other night, the changes in TWT, WASO, REM, and SWS were reversed. In Study 2, sleep onset latencies (SOL) and core temperature (Tc) of 10 young men were measured for 3 nonconsecutive nights. In a cross-over design, atenolol given on one night significantly suppressed urinary 6-sulphatoxymelatonin (6s-aMT) production and increased hourly measures of Tc and SOL relative to baseline night values. Oral melatonin (3 mg), administered after atenolol, reversed the changes in Tc and SOL. These results suggest that endogenous melatonin may assist in the maintenance of normal sleep architecture (Study 1) and also increase nocturnal sleep propensity by hypothermic effects (Study 2).

Original languageEnglish (US)
Pages (from-to)795-802
Number of pages8
JournalPhysiology and Behavior
Volume61
Issue number6
DOIs
StatePublished - Jun 1997

Keywords

  • Atenolol
  • Core temperature
  • Melatonin
  • Sleep
  • Sleep onset latency

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Behavioral Neuroscience

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