rs10501087

Meta-analysis of 28 studies (range 38-7,173 participants) found no significant association between BDNF genetic variants and major depressive disorder. Val66Met (rs6265) showed OR=0.96 (95% CI: 0.89-1.05; P=0.402), and gene-based analysis of 17 total BDNF SNPs indicated no cumulative association with MDD (all P>0.21).

Genome-wide association study of six eating disorder-related phenotypes (Drive for Thinness, Body Dissatisfaction, Bulimia, Weight Fluctuation, Breakfast Skipping, and Childhood Obsessive-Compulsive traits) across 2,698-2,967 individuals from TwinsUK discovery and two independent European replication cohorts. Meta-analysis identified eight genetic variants with suggestive evidence of association (P < 10^-5), including rs7624327 near CCNL1 (P=3.34E-06, OR=1.13 for Bulimia), rs1898111 in SEMA6D (P=7.66E-06, OR=0.872 for OCPD), and rs6894268 in RUFY1 (P=2.38E-06 for Body Dissatisfaction), but no signals reached genome-wide significance threshold (P < 5×10^-8).

This study analyzed genotype-expression interactions for BDNF across five human brain regions using GTEx data from 300 subjects (985 tissue samples). At FDR < 0.1, 61 SNPs in cerebellum, 55 in cortex, 48 in nucleus accumbens, 47 in caudate, and 58 in cerebellar hemisphere were associated with BDNF expression. Thirty SNPs in two haplotype blocks were shared across all five regions, including rs6265 (Val66Met), rs16917204, rs11030104, and rs6484320, which have been previously associated with psychiatric disorders including depression, bipolar disorder, schizophrenia, OCD, epilepsy, and addiction.