PMID- 26999419 OWN - NLM STAT- MEDLINE DCOM- 20180126 LR - 20180820 IS - 1477-2205 (Electronic) IS - 1061-5806 (Linking) VI - 29 IP - 6 DP - 2016 Nov TI - Brain-derived neurotrophic factor Val66met polymorphism and plasma levels in road traffic accident survivors. PG - 616-29 LID - 10.1080/10615806.2016.1163545 [doi] AB - BACKGROUND: Alterations in brain-derived neurotrophic factor (BDNF) expression and release may play a role in the pathogenesis of post-traumatic stress disorder (PTSD). DESIGN: This study evaluated road traffic accident (RTA) survivors to determine whether PTSD and trauma-related factors were associated with plasma BDNF levels and BDNF Val66Met carrier status following RTA exposure. METHODS: One hundred and twenty-three RTA survivors (mean age 33.2 years, SD = 10.6 years; 56.9% male) were assessed 10 (SD = 4.9) days after RTA exposure. Acute stress disorder (ASD), as assessed with the Acute Stress Disorder Scale, was present in 50 (42.0%) of the participants. Plasma BDNF levels were measured with enzyme-linked immunosorbent assay and BDNF Val66Met genotyping was performed. PTSD, as assessed with the Clinician-Administered PTSD Scale, was present in 10 (10.8%) participants at 6 months follow-up. RESULTS: Neither BDNF Val66Met genotype nor plasma BDNF was significantly associated with the presence or severity of ASD or PTSD. Plasma BDNF levels were, however, significantly correlated with the lifetime number of trauma exposures. CONCLUSIONS: In RTA survivors, plasma BDNF levels increased with increasing number of prior trauma exposures. Plasma BDNF may, therefore, be a marker of trauma load. FAU - van den Heuvel, Leigh AU - van den Heuvel L AD - a Department of Psychiatry, Faculty of Medicine and Health Sciences , University of Stellenbosch , Cape Town , South Africa. FAU - Suliman, Sharain AU - Suliman S AD - a Department of Psychiatry, Faculty of Medicine and Health Sciences , University of Stellenbosch , Cape Town , South Africa. FAU - Malan-Muller, Stefanie AU - Malan-Muller S AD - a Department of Psychiatry, Faculty of Medicine and Health Sciences , University of Stellenbosch , Cape Town , South Africa. AD - b Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences , University of Stellenbosch , Cape Town , South Africa. FAU - Hemmings, Sian AU - Hemmings S AD - a Department of Psychiatry, Faculty of Medicine and Health Sciences , University of Stellenbosch , Cape Town , South Africa. AD - b Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences , University of Stellenbosch , Cape Town , South Africa. FAU - Seedat, Soraya AU - Seedat S AD - a Department of Psychiatry, Faculty of Medicine and Health Sciences , University of Stellenbosch , Cape Town , South Africa. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160329 PL - England TA - Anxiety Stress Coping JT - Anxiety, stress, and coping JID - 9212242 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 7171WSG8A2 (BDNF protein, human) RN - AE28F7PNPL (Methionine) RN - HG18B9YRS7 (Valine) SB - IM MH - Accidents, Traffic/*statistics & numerical data MH - Adult MH - Brain-Derived Neurotrophic Factor/*blood/genetics MH - Enzyme-Linked Immunosorbent Assay MH - Female MH - Genetic Predisposition to Disease/genetics MH - Humans MH - Male MH - Methionine MH - Polymorphism, Genetic/*genetics MH - Prospective Studies MH - Stress Disorders, Post-Traumatic/*blood/*genetics MH - Survivors/*statistics & numerical data MH - Valine OTO - NOTNLM OT - Brain-derived neurotrophic factor (BDNF) OT - Val66met OT - acute stress disorder (ASD) OT - plasma OT - post-traumatic stress disorder (PTSD) OT - trauma EDAT- 2016/03/22 06:00 MHDA- 2018/01/27 06:00 CRDT- 2016/03/22 06:00 PHST- 2016/03/22 06:00 [entrez] PHST- 2016/03/22 06:00 [pubmed] PHST- 2018/01/27 06:00 [medline] AID - 10.1080/10615806.2016.1163545 [doi] PST - ppublish SO - Anxiety Stress Coping. 2016 Nov;29(6):616-29. doi: 10.1080/10615806.2016.1163545. Epub 2016 Mar 29.