Thorsten Mikoteit1, Serge Brand2, Anne Eckert3, Edith Holsboer-Trachsler4, Johannes Beck5. 1. University of Basel, Psychiatric Clinics (UPK), Basel, Switzerland; Psychiatric Services Solothurn and Faculty of Medicine of the University of Basel, Solothurn, Switzerland; Max Planck Institute of Psychiatry, Munich, Germany. Electronic address: thorsten.mikoteit@spital.so.ch. 2. University of Basel, Psychiatric Clinics (UPK), Basel, Switzerland; University of Basel, Department of Sport, Exercise and Health, Division of Sport and Psychosocial Health, Basel, Switzerland; Kermanshah University of Medical Sciences, Psychiatry Department, Substance Use Disorders Prevention Center, Sleep Disorders Research Center, Kermanshah, Iran. 3. University of Basel, Psychiatric Clinics (UPK), Basel, Switzerland; University of Basel, Neurobiology Lab for Brain Aging and Mental Health, Transfaculty Research Platform Molecular & Cognitive Neuroscience, Basel, Switzerland. 4. University of Basel, Psychiatric Clinics (UPK), Basel, Switzerland. 5. University of Basel, Psychiatric Clinics (UPK), Basel, Switzerland; Psychiatric Hospital Sonnenhalde, Riehen, Switzerland.
Abstract
OBJECTIVES: Brain-derived neurotrophic factor (BDNF) is a central mediator of the effects of stress on neuronal plasticity. Patients with subjective insomnia have significantly lower serum BDNF (sBDNF) levels. The aims of the present study were to investigate the associations of sBDNF with, 1) subjective and 2) objective sleep; 3) to investigate the associations between dimensions of psychopathology, subjective sleep and sBDNF, and 4) to investigate the associations between insomnia, sBDNF and cortisol. METHODS: 60 patients with insomnia (IG; mean age: 40.4 years; 48.3% females) and 30 healthy, age and gender-matched controls (CG) took part in the study. Subjective sleep was assessed using the Insomnia Severity Index (ISI), objective sleep was assessed once via sleep-EEG recordings. Both sBDNF and salivary cortisol were sampled once the following morning. Last, experts rated participants' symptoms of depression and anxiety. RESULTS: sBDNF was significantly lower in the IG than in the CG (large effect size; Hedge's g = 1.75), while higher insomnia scores, but not depression or anxiety ratings, predicted lower sBDNF levels. Concerning objective sleep, low sBDNF did not correlate with sleep continuity measures, but with decreased REM-sleep; the latter was also characteristic of the IG. sBDNF and salivary morning cortisol were unrelated. CONCLUSIONS: Independently of symptoms of depression or anxiety, sBDNF appears to be a biomarker for the clinical diagnosis of insomnia, but not for objectively assessed poor sleep continuity. A possible link between sBDNF and insomnia seems to be via regulation of REM-sleep, but not salivary morning cortisol.
OBJECTIVES:Brain-derived neurotrophic factor (BDNF) is a central mediator of the effects of stress on neuronal plasticity. Patients with subjective insomnia have significantly lower serum BDNF (sBDNF) levels. The aims of the present study were to investigate the associations of sBDNF with, 1) subjective and 2) objective sleep; 3) to investigate the associations between dimensions of psychopathology, subjective sleep and sBDNF, and 4) to investigate the associations between insomnia, sBDNF and cortisol. METHODS: 60 patients with insomnia (IG; mean age: 40.4 years; 48.3% females) and 30 healthy, age and gender-matched controls (CG) took part in the study. Subjective sleep was assessed using the Insomnia Severity Index (ISI), objective sleep was assessed once via sleep-EEG recordings. Both sBDNF and salivary cortisol were sampled once the following morning. Last, experts rated participants' symptoms of depression and anxiety. RESULTS: sBDNF was significantly lower in the IG than in the CG (large effect size; Hedge's g = 1.75), while higher insomnia scores, but not depression or anxiety ratings, predicted lower sBDNF levels. Concerning objective sleep, low sBDNF did not correlate with sleep continuity measures, but with decreased REM-sleep; the latter was also characteristic of the IG. sBDNF and salivary morning cortisol were unrelated. CONCLUSIONS: Independently of symptoms of depression or anxiety, sBDNF appears to be a biomarker for the clinical diagnosis of insomnia, but not for objectively assessed poor sleep continuity. A possible link between sBDNF and insomnia seems to be via regulation of REM-sleep, but not salivary morning cortisol.
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Authors: Giuliana Travassos Pires Santiago; Ana Cecília de Menezes Galvão; Raíssa Nóbrega de Almeida; Sergio Arthuro Mota-Rolim; Fernanda Palhano-Fontes; João Paulo Maia-de-Oliveira; Dráulio Barros de Araújo; Bruno Lobão-Soares; Nicole Leite Galvão-Coelho Journal: Front Behav Neurosci Date: 2020-04-28 Impact factor: 3.558