Chronic depression is associated with a pronounced decrease in serum brain-derived neurotrophic factor over time

One of the leading neurobiological hypotheses on depression states that decreased expression of brain-derived neurotrophic factor (BDNF) contributes to depression. This is supported by consistent findings of low serum BDNF levels in depressed patients compared with non-depressed controls. Whereas it...

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Veröffentlicht in:Molecular psychiatry 2015-05, Vol.20 (5), p.602-608
Hauptverfasser: Bus, B A A, Molendijk, M L, Tendolkar, I, Penninx, B W J H, Prickaerts, J, Elzinga, B M, Voshaar, R C O
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container_start_page 602
container_title Molecular psychiatry
container_volume 20
creator Bus, B A A
Molendijk, M L
Tendolkar, I
Penninx, B W J H
Prickaerts, J
Elzinga, B M
Voshaar, R C O
description One of the leading neurobiological hypotheses on depression states that decreased expression of brain-derived neurotrophic factor (BDNF) contributes to depression. This is supported by consistent findings of low serum BDNF levels in depressed patients compared with non-depressed controls. Whereas it has been generally assumed that this is a state characteristic of depression, strong inferences about state or trait effects require a longitudinal study design. To investigate the longitudinal association between serum BDNF and depression, we measured serum BDNF, (current and past) depression status, use of antidepressants, and all potential covariates at baseline and after 2 years in 1751 individuals, consisting of patients with an incident ( n =153), remitted ( n =420) and persistent depression ( n =310) and non-depressed controls ( n =868). We analyzed change/differences in serum BDNF across these four groups with analyses of covariance adjusted for covariates and baseline BDNF value, together with the effects of starting and stopping antidepressant treatment. Our analyses revealed a significant difference for the depression course groups ( P =0.007). Compared with non-depressed controls, persistently depressed and remitted patients had a steeper decrease of BDNF levels over time (−1.33 ( P =0.001) and −0.97 ng ml −1 ( P =0.011), respectively), whereas BDNF reductions in patients with incident depression were similar to those in healthy controls. Initiation or discontinuation of antidepressants was not associated with BDNF change ( P =0.72). These findings suggest that BDNF not only contributes to depression, but that depression in turn may also contribute to low BDNF.
doi_str_mv 10.1038/mp.2014.83
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subjects 631/378/1686
692/699/476/1414
Adult
Analysis
Antidepressants
Antidepressants, Tricyclic
Antidepressive Agents - therapeutic use
Anxiety
Behavioral Sciences
Biological Psychology
Brain-derived neurotrophic factor
Brain-Derived Neurotrophic Factor - blood
Care and treatment
Child
Child Abuse - psychology
Chronic Disease
Cohort analysis
Comparative analysis
Depression - blood
Depression - classification
Depression - drug therapy
Depression, Mental
Diagnosis
Female
Humans
Hypotheses
Longitudinal Studies
Male
Medicine
Medicine & Public Health
Mental depression
Mental health
Middle Aged
Neurobiology
Neuropsychology
Neurosciences
original-article
Pharmacotherapy
Psychiatric Status Rating Scales
Psychiatry
Retrospective Studies
Statistics, Nonparametric
Stress
Stress response
title Chronic depression is associated with a pronounced decrease in serum brain-derived neurotrophic factor over time
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