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The brain‐derived neurotrophic‐factor ( BDNF ) val66met polymorphism is associated with geriatric depression: A meta‐analysis
Author(s) -
Pei Yu,
Smith Alicia K.,
Wang Yongjun,
Pan Yanli,
Yang Jian,
Chen Qi,
Pan Weigang,
Bao Feng,
Zhao Lisha,
Tie Changle,
Wang Yizheng,
Wang Jian,
Zhen Wenfeng,
Zhou Jinxia,
Ma Xin
Publication year - 2012
Publication title -
american journal of medical genetics part b: neuropsychiatric genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.393
H-Index - 126
eISSN - 1552-485X
pISSN - 1552-4841
DOI - 10.1002/ajmg.b.32062
Subject(s) - rs6265 , depression (economics) , brain derived neurotrophic factor , medicine , allele , oncology , neurotrophic factors , polymorphism (computer science) , meta analysis , psychology , endocrinology , psychiatry , clinical psychology , genetics , biology , receptor , gene , macroeconomics , economics
Depression has been associated with reduced expression of brain‐derived neurotrophic factor ( BDNF ) in the hippocampus. Genetic association studies of the BDNF Val66Met polymorphism (rs6265) in geriatric depression have produced inconsistent results. A meta‐analysis of studies was conducted to compare the frequency of the BDNF Val66Met variant between cases with geriatric depression and age‐matched controls. A total of five studies involving 523 cases with geriatric depression and 1,220 psychiatrically healthy controls was included. Met allele carriers had an increased risk for geriatric depression when compared to Val/Val homozygotes ( P = 0.004, OR = 1.48, 95% CI = 1.13–1.93). Our findings suggest the BDNF Met allele may confer increased risk for depression as individual age. © 2012 Wiley Periodicals, Inc.