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Influence of DAP1 Genotype and Psychosocial Factors on Posttraumatic Stress Disorder in Thai Tsunami Survivors: A GxE Approach

DOI: 10.4236/ojgen.2019.93005, PP. 65-75

Keywords: Death-Associated Protein 1 Gene (DAP1), Gene-by-Environment Interaction (GxE), Genetype, Posttraumatic Stress Disorder (PTSD), Psychosocialfactors, Tsunami

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Background: Posttraumatic Stress Disorder (PTSD) is a psychiatric disorder found in individuals afflicted by a traumatic event including the natural disaster. “Tsunami” occurred in Andaman coast of Thailand on December 26, 2004, in which 33.6% of survivors were diagnosed as PTSD. This study aimed to explore the single nucleotide polymorphism (SNP). rs267943 genotype is located on chromosome 5 in the intron of the death-associated protein 1 (DAP1) gene and psychosocial factors for PTSD. Methods: Participants (N = 1970) were recruited from volunteers who have complete data both of DAP1 gene and psychosocial factor. Results: Using a binary logistic regression model, significant gene-environment interactions were found for the single nucleotide polymorphism (SNP) rs267943 and psychosocial factors including depression (adj. OR = 6.0, 95% CI = 4.29 - 8.39), neurotic personality (adj. OR = 2.73, 95% CI = 2.18 - 3.42), planning (adj. OR = 1.52, 95% CI = 1.20 - 1.93), use of emotional support (adj. OR = 1.32, 95% CI = 1.21 - 1.94) with statistical significant p < 0.001 and self-distraction (adj. OR = 1.52, 95% CI = 1.15 - 1.85) with statistical significant p < 0.05. Conclusion: This study demonstrated that GxE studies can be utilized to shed light on the origins of PTSD.


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