High BDNF serum levels are associated to good cognitive functioning in bipolar disorder.
Adult
Biomarkers
/ blood
Bipolar Disorder
/ diagnosis
Brain-Derived Neurotrophic Factor
/ blood
Cognition
/ physiology
Correlation of Data
Executive Function
/ physiology
Female
Humans
Inflammation
/ blood
Interleukin-6
/ blood
Male
Neurobiology
/ methods
Neuropsychological Tests
Oxidative Stress
/ physiology
BNDF
Bipolar disorder
Cognition
Neurobiological factor
Journal
European psychiatry : the journal of the Association of European Psychiatrists
ISSN: 1778-3585
Titre abrégé: Eur Psychiatry
Pays: England
ID NLM: 9111820
Informations de publication
Date de publication:
08 2019
08 2019
Historique:
received:
28
12
2018
revised:
18
02
2019
accepted:
18
02
2019
pubmed:
28
2
2019
medline:
4
7
2020
entrez:
28
2
2019
Statut:
ppublish
Résumé
Neurotrophins such as brain-derived neurotrophic factor (BDNF), inflammation and oxidative damage may contribute to the pathophysiology of bipolar disorder (BD) in terms of illness activity. To date, there is a lack of studies linking the cognitive impairment observed in BD with these neurobiological mechanisms. This study aimed to investigate the role of these neurobiological factors in clinical and cognitive outcomes in a sample of bipolar individuals. We measured serum BDNF, cytokines and oxidative stress markers in a sample of 133 individuals: 52 euthymic bipolar patients, 32 manic patients and 49 healthy controls. They were all assessed with a comprehensive cognitive battery. Sociodemographic and clinical data were collected. Multiple linear regression models were built to study associations of neurotrophins and inflammatory and oxidative measures with cognitive functioning. BDNF levels were decreased in euthymic (p = 0.039) and manic (p < 0.001) individuals. Conversely, inflammatory (interleukin 6 (IL-6)) (p = 0.019) and oxidative stress (p = 0.003) measures were increased in bipolar individuals compared to controls. BDNF levels were associated with executive functioning (β = 0.01, p = 0.02) and verbal memory (β = 0.013, p = 0.005), together with other demographic variables. In particular, verbal memory was also associated with obesity (β=-0.04, p = 0.005). Neither inflammatory markers, oxidative stress markers nor other relevant clinical variables showed any association with cognitive outcome. Of all the peripheral neurobiological factors analysed, BDNF was the only one significantly associated with cognitive dysfunction in bipolar disorder individuals. This study emphasizes the role of BDNF not only across mood phases but also in cognitive functioning.
Sections du résumé
BACKGROUND
Neurotrophins such as brain-derived neurotrophic factor (BDNF), inflammation and oxidative damage may contribute to the pathophysiology of bipolar disorder (BD) in terms of illness activity. To date, there is a lack of studies linking the cognitive impairment observed in BD with these neurobiological mechanisms. This study aimed to investigate the role of these neurobiological factors in clinical and cognitive outcomes in a sample of bipolar individuals.
METHODS
We measured serum BDNF, cytokines and oxidative stress markers in a sample of 133 individuals: 52 euthymic bipolar patients, 32 manic patients and 49 healthy controls. They were all assessed with a comprehensive cognitive battery. Sociodemographic and clinical data were collected. Multiple linear regression models were built to study associations of neurotrophins and inflammatory and oxidative measures with cognitive functioning.
RESULTS
BDNF levels were decreased in euthymic (p = 0.039) and manic (p < 0.001) individuals. Conversely, inflammatory (interleukin 6 (IL-6)) (p = 0.019) and oxidative stress (p = 0.003) measures were increased in bipolar individuals compared to controls. BDNF levels were associated with executive functioning (β = 0.01, p = 0.02) and verbal memory (β = 0.013, p = 0.005), together with other demographic variables. In particular, verbal memory was also associated with obesity (β=-0.04, p = 0.005). Neither inflammatory markers, oxidative stress markers nor other relevant clinical variables showed any association with cognitive outcome.
CONCLUSIONS
Of all the peripheral neurobiological factors analysed, BDNF was the only one significantly associated with cognitive dysfunction in bipolar disorder individuals. This study emphasizes the role of BDNF not only across mood phases but also in cognitive functioning.
Identifiants
pubmed: 30808582
pii: S0924-9338(19)30044-6
doi: 10.1016/j.eurpsy.2019.02.006
pii:
doi:
Substances chimiques
Biomarkers
0
Brain-Derived Neurotrophic Factor
0
Interleukin-6
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
97-107Informations de copyright
Copyright © 2019 Elsevier Masson SAS. All rights reserved.