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Exploring the association between BDNF Val66Met polymorphism and suicidal behavior: Meta-analysis and systematic review.

Abstract：

:Suicide is a serious worldwide health problem of critical consequences. Nowadays genetic factors are considered to be an important cause of suicide. The association between Val66Met (rs6265) polymorphism of the BDNF gene and suicide behavior has been increasingly studied. The aim of this study was to perform a meta-analysis in order to unravel the possible association between BDNF gene Val66Met polymorphism and suicide behavior. These meta-analysis and systematic review were performed using 23 articles that searched for a genetic association between Val66Met and suicide behavior, including 4532 cases and 5364 control subjects. The association was analyzed following the models: allelic, homozygous, heterozygous, dominant and recessive. Also, analyses by ethnicity (Caucasian and Asian populations) were done following the same four models. When the overall population was evaluated, we found no evidence of association between the polymorphism Val66Met of BDNF (rs6265) and suicide behavior (Met vs. Val: OR: 1.01; 95% CI = 0.92-1.10). However, a significant increased risk was found in the subgroup analysis by ethnicity in Caucasian populations (Met-Met vs. Met-Val + Val-Val: OR: 1.96; 95% CI = 1.58-2.43) and Asian populations (Val-Val vs. Val-Met + Met: OR: 1.36; 95% CI = 1.04-1.78). Our results suggest there is no association between the BDNF gene Val66Met (rs6265) and suicide behavior in the overall population. However, ethnic differences can be observed and the BDNF Val66Met might increase the risk for suicide behavior in Asian and Caucasian populations. Further studies with larger samples are necessary in order to have conclusive outcomes.

journal_name

J Psychiatr Res

journal_title

Journal of psychiatric research

authors

González-Castro TB,Salas-Magaña M,Juárez-Rojop IE,López-Narváez ML,Tovilla-Zárate CA,Hernández-Díaz Y

doi

10.1016/j.jpsychires.2017.07.020

subject

Has Abstract

pub_date

2017-11-01 00:00:00

pages

208-217

eissn

0022-3956

issn

1879-1379

pii

S0022-3956(17)30547-2

journal_volume

94

pub_type

杂志文章,meta分析,评审

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