Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The Risk of Posttraumatic Stress Disorder After Trauma Depends on Traumatic Load and the Catechol-O-Methyltransferase Val158Met Polymorphism
AU - Kolassa, Iris- Tatjana
AU - Kolassa, Stephan
AU - Ertl, Verena
AU - Papassotiropoulos, A.
AU - De Quervain, D.
PY - 2010
Y1 - 2010
N2 - BackgroundThe risk for posttraumatic stress disorder (PTSD) depends on the number of traumatic event types experienced in a dose–response relationship, but genetic factors are known to also influence the risk of PTSD. The catechol-O-methyltransferase (COMT) Val158Met polymorphism has been found to affect fear extinction and might play a role in the etiology of anxiety disorders.MethodsTraumatic load and lifetime and current diagnosis of PTSD and COMT genotype were assessed in a sample of 424 survivors of the Rwandan Genocide living in the Nakivale refugee camp in southwestern Uganda.ResultsHigher numbers of different lifetime traumatic event types led to a higher prevalence of lifetime PTSD in a dose–response relationship. However, this effect was modulated by the COMT genotype: whereas Val allele carriers showed the typical dose–response relationship, Met/Met homozygotes exhibited a high risk for PTSD independently of the severity of traumatic load.ConclusionsThe present findings indicate a gene–environment interaction between the human COMT Val158Met polymorphism and the number of traumatic event types experienced in the risk of developing PTSD.
AB - BackgroundThe risk for posttraumatic stress disorder (PTSD) depends on the number of traumatic event types experienced in a dose–response relationship, but genetic factors are known to also influence the risk of PTSD. The catechol-O-methyltransferase (COMT) Val158Met polymorphism has been found to affect fear extinction and might play a role in the etiology of anxiety disorders.MethodsTraumatic load and lifetime and current diagnosis of PTSD and COMT genotype were assessed in a sample of 424 survivors of the Rwandan Genocide living in the Nakivale refugee camp in southwestern Uganda.ResultsHigher numbers of different lifetime traumatic event types led to a higher prevalence of lifetime PTSD in a dose–response relationship. However, this effect was modulated by the COMT genotype: whereas Val allele carriers showed the typical dose–response relationship, Met/Met homozygotes exhibited a high risk for PTSD independently of the severity of traumatic load.ConclusionsThe present findings indicate a gene–environment interaction between the human COMT Val158Met polymorphism and the number of traumatic event types experienced in the risk of developing PTSD.
U2 - 10.1016/j.biopsych.2009.10.009
DO - 10.1016/j.biopsych.2009.10.009
M3 - Journal article
VL - 67
SP - 304
EP - 308
JO - Biological Psychiatry
JF - Biological Psychiatry
SN - 0006-3223
IS - 4
ER -