Circadian rhythms of melatonin and peripheral clock gene expression in idiopathic REM sleep behavior disorder

Sep 9, 2018Sleep medicine

Daily patterns of melatonin and body clock gene activity in unexplained REM sleep behavior disorder

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Abstract

RBD patients exhibited a 2-hour delay in melatonin secretion compared to healthy controls.

  • Circadian rhythmicity was absent for the clock genes Per2, Bmal1, and Nr1d1 in RBD patients.
  • The rhythmicity of the clock gene Per1 remained in RBD patients, while the amplitude of Per3 was reduced.
  • The melatonin profile of RBD patients showed a more dispersed range of acrophases over 11 hours compared to the stable 5-hour range in controls.
  • Habitual sleep phases in RBD patients were phase delayed by about 1 hour.
  • No phase shift was observed in any of the clock genes studied in RBD patients.

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