title: Late, but not early, wake therapy reduces morning plasma melatonin: relationship to mood in Premenstrual Dysphoric Disorder.
abstract: Wake therapy improves mood in Premenstrual Dysphoric Disorder (PMDD), a depressive disorder in DSM-IV. We tested the hypothesis that the therapeutic effect of wake therapy in PMDD is mediated by altering sleep phase with melatonin secretion. We measured plasma melatonin every 30 min (18:00-09:00 h) in 19 PMDD and 18 normal control (NC) women during mid-follicular (MF) and late luteal (LL) menstrual cycle phases, and during LL interventions with early wake therapy (EWT) (sleep 03:00-07:00 h)(control condition) vs. late wake therapy (LWT) (sleep 21:00-01:00 h)(active condition). Melatonin offset was delayed and duration was longer in the symptomatic LL vs. asymptomatic MF phase in both NC and PMDD subjects. LWT, but not EWT, advanced offset and shortened duration vs. the LL baseline, although they improved mood equally. Later baseline LL morning melatonin offset was associated with more depressed mood in PMDD patients, and longer melatonin duration in the MF phase predicted greater mood improvement following LWT. That LWT, but not EWT, advanced melatonin offset and shortened duration while they were equally effective in improving mood suggests that decreasing morning melatonin secretion is not necessary for the therapeutic effects of wake therapy in PMDD.
authors.affiliation: Department of Psychiatry, University of California, San Diego, La Jolla, CA 92093-0804, United States. bparry@ucsd.edu
authors.forename: Barbara L
authors.initials: BL
authors.lastname: Parry
authors.forename: Charles J
authors.initials: CJ
authors.lastname: Meliska
authors.forename: L Fernando
authors.initials: LF
authors.lastname: Martínez
authors.forename: Ana M
authors.initials: AM
authors.lastname: López
authors.forename: Diane L
authors.initials: DL
authors.lastname: Sorenson
authors.forename: Richard L
authors.initials: RL
authors.lastname: Hauger
authors.forename: Jeffrey A
authors.initials: JA
authors.lastname: Elliott
mesh_terms: D000328:Adult; D000339:Affect / Q000502:physiology*; D002940:Circadian Rhythm / Q000502:physiology*; D005260:Female; D006801:Humans; D008550:Melatonin / Q000097:blood*; D008597:Menstrual Cycle / Q000097:blood; D011293:Premenstrual Syndrome / Q000097:blood* / Q000175:diagnosis / Q000523:psychology; D012892:Sleep Deprivation / Q000097:blood / Q000523:psychology; D055865:Sleep Phase Chronotherapy; D014851:Wakefulness / Q000502:physiology*
chemical_list: D008550:Melatonin
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