Cited by 183Treatment of Major DepressionSuicide and Self-Harm StudiesNeurotransmitter Receptor Influence on Behavior

Association of BDNF Val66Met Polymorphism and Brain BDNF Levels with Major Depression and Suicide

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Youssef, Mariam M, Underwood, Mark D, Huang, Yung-Yu, Hsiung, Shu-chi, Liu, Yan, Simpson, Norman R, Bakalian, Mihran J, Rosoklija, Gorazd B +3 more·2018·International Journal of Neuropsychopharmacology

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Abstract

Background: Brain-derived neurotrophic factor is implicated in the pathophysiology of major depressive disorder and suicide. Both are partly caused by early life adversity, which reduces brain-derived neurotrophic factor protein levels. This study examines the association of brain-derived neurotrophic factor Val66Met polymorphism and brain brain-derived neurotrophic factor levels with depression and suicide. We hypothesized that both major depressive disorder and early life adversity would be associated with the Met allele and lower brain brain-derived neurotrophic factor levels. Such an association would be consistent with low brain-derived neurotrophic factor mediating the effect of early life adversity on adulthood suicide and major depressive disorder. Methods: Brain-derived neurotrophic factor Val66Met polymorphism was genotyped in postmortem brains of 37 suicide decedents and 53 nonsuicides. Additionally, brain-derived neurotrophic factor protein levels were determined by Western blot in dorsolateral prefrontal cortex (Brodmann area 9), anterior cingulate cortex (Brodmann area 24), caudal brainstem, and rostral brainstem. The relationships between these measures and major depressive disorder, death by suicide, and reported early life adversity were examined. Results: Subjects with the Met allele had an increased risk for depression. Depressed patients also have lower brain-derived neurotrophic factor levels in anterior cingulate cortex and caudal brainstem compared with nondepressed subjects. No effect of history of suicide death or early life adversity was observed with genotype, but lower brain-derived neurotrophic factor levels in the anterior cingulate cortex were found in subjects who had been exposed to early life adversity and/or died by suicide compared with nonsuicide decedents and no reported early life adversity. Conclusions: This study provides further evidence implicating low brain brain-derived neurotrophic factor and the brain-derived neurotrophic factor Met allele in major depression risk. Future studies should seek to determine how altered brain-derived neurotrophic factor expression contributes to depression and suicide.

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  1. Oquendo MA, Halberstam B, Mann JJ(2003) Risk factors for suicidal behavior: utility and limitations of research instruments. In: Standardized evaluation in clinical practice, 1st Edition (First MB, ed), pp103–130. Washington, DC: American Psychiatric Publishing.
  2. Siuciak JA, Lewis DR, Wiegand SJ, Lindsay RM (1997b) Antidepressant-like effect of brain-derived neurotrophic factor (BDNF). Pharmacol Biochem Behav 56: 131– 137. 8981620

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Authors
Youssef, M. M., Underwood, M. D., Huang, Y.-Y., Hsiung, S.-C., Liu, Y., Simpson, N. R., Bakalian, M. J., Rosoklija, G. B., Dwork, A. J., Arango, V., & Mann, J. J.
Affiliations
  • New York State Psychiatric Institute (US)
  • Macedonian Academy of Sciences and Arts (MK)
Corresponding author
Underwood, Mark D
Venue
International Journal of Neuropsychopharmacology
Published
2018-02-08
Volume
21
Issue
6
Pages
528-538
ISSN
  • 1461-1457 (ISSN-L)
  • 1469-5111
OpenAlex
W2950435009
Cited by
183
References
110
Citations by year
2026: 3 · 2025: 11 · 2024: 20 · 2023: 22 · 2022: 35 · 2021: 49 · 2020: 23 · 2019: 14 · 2018: 5
FWCI
14.68
Type
journal article
Language
en
Open access
Locations
  • The International Journal of Neuropsychopharmacology (publishedVersion, public-domain)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, public-domain)
  • PubMed Central (publishedVersion, public-domain)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (MH40210, MH62185, MH90964, MH64168)
Topics
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Social Sciences › Psychology › Clinical Psychology › Suicide and Self-Harm Studies
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
brain-derived neurotrophic factor, BDNF Val66Met polymorphism, major depressive disorder, suicide, childhood adversity, anterior cingulate cortex, dorsolateral prefrontal cortex, caudal brainstem, postmortem brain, genetic risk
MeSH terms
Adult Survivors of Child Adverse Events, Adult, Alleles, Brain, Depressive Disorder, Major, Major Depressive Disorder, Female, Humans, Male, Middle Aged, Suicide, Brain-Derived Neurotrophic Factor, Genetic Predisposition to Disease, Polymorphism, Single Nucleotide, Genetic Association Studies

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