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  • Title: Genetic association of FKBP5 with PTSD in US service members deployed to Iraq and Afghanistan.
    Author: Zhang L, Hu XZ, Yu T, Chen Z, Dohl J, Li X, Benedek DM, Fullerton CS, Wynn G, Barrett JE, Li M, Russell DW, Biomarker team, Ursano RJ.
    Journal: J Psychiatr Res; 2020 Mar; 122():48-53. PubMed ID: 31927265.
    Abstract:
    Post-traumatic stress disorder (PTSD) is a debilitating mental disorder with a prevalence of more than 7% in the US population and 12% in the military. An interaction of childhood trauma with FKBP5 (a glucocorticoid-regulated immunophilin) has been reported to be associated with PTSD in the general population. However, there are few reports on the association of FKBP5 with PTSD, particularly in important high-risk population such as the military. Here, we examined the association between four single-nucleotide polymorphisms (SNPs; rs3800373, rs9296158, rs1360780, rs9470080) covering the FKBP5 gene and probable PTSD in US service members deployed to Iraq and Afghanistan, a high-risk military population (n = 3890) (Hines et al., 2014). We found that probable PTSD subjects were significantly more likely to carry the A-allele of rs3800373, G-allele of rs9296158, C-allele of rs1360780, and C-allele of rs9470080. Furthermore, the four SNPs were in one block of strong pairwise linkage disequilibrium (r = 0.91-0.96). Within the block there were two major haplotypes of CATT and AGCC (rs3800373-rs9296158-rs1360780-rs9470080) that account for 99% of haplotype diversity. The distribution of the AGCC haplotype was significantly higher in probable PTSD subjects compared to non-PTSD (p<.05). The diplotype-based analysis indicated that the AGCC carriers tended to be probable PTSD. In this study, we demonstrated the association between FKBP5 and probable PTSD in US service members deployed to Iraq and Afghanistan, indicating that FKBP5 might be a risk factor for PTSD.
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