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Objective: Given evidence that posttraumatic stress disorder (PTSD) is moderately heritable, a number of studies utilizing candidate gene approaches have attempted to examine the potential contributions of theoretically relevant genetic variation. Some of these studies have found sup port for a brain-derived neurotrophic factor (BDNF) variant, Val66Met, in the risk of developing PTSD, while others have failed to find this link. Methods: This study sought to reconcile these conflicting findings using a meta-analysis framework. Analyses were also used to determine whether there is significant heterogeneity in the link between this variant and PTSD. We conducted a systematic review of the literature on BDNF and PTSD from the PsycINFO and PubMed databases. A total of 11 studies were included in the analysis. Results: Findings indicate a marginally significant effect of the BDNF Val66Met variant on PTSD (p < 0.1). However, of the 11 studies included, only 2 suggested an effect with a non-zero confidence interval, one of which showed a z score of 3.31. We did not find any evidence for heterogeneity. Conclusions: Findings from this meta-analytic investigation of the published literature provide little support for the Val66Met variant of BDNF as a predictor of PTSD. Future well-powered agnostic genome-wide association studies with more refined phenotyping are needed to clarify genetic influences on PTSD. [ABSTRACT FROM AUTHOR]

Objectives Exposure-based psychotherapies for posttraumatic stress disorder (PTSD) are effective for many, but not all patients. It is important to determine for whom these treatments work and to examine predictors of success. Method An 8-week modified prolonged exposure (PE) treatment, including components of behavioral activation and reducing the number of imaginal exposure sessions, was administered to a sample of 231 Veterans (mean age = 45.7 years, standard deviation = 14.89). Growth mixture modeling was used to model PTSD symptom trajectories across the 8-week intervention and a postintervention appointment. Further, baseline demographics, social support, clinician-rated PTSD symptoms, anxiety, and depression were examined as predictors of trajectories. Results Three classes emerged, labeled responders ( n = 35), nonresponders ( n = 190), and immediate responders ( n = 6). The only significant baseline difference between responders and nonresponders was higher anxiety symptoms in the nonresponders. At follow-up time points, there were higher levels of clinician-rated PTSD, anxiety, and depression symptoms and lower social support in the nonresponders compared to the responders. Conclusion Findings suggest that modifying standard PE treatments by reducing imaginal exposure sessions while adding behavioral activation may not be advisable for most Veterans with PTSD. [ABSTRACT FROM AUTHOR]

Persulfate salts may cause contact urticaria, allergic and irritant contact dermatitis, rhinitis and asthma. The mechanism of the immediate reactions has been unclear. Positive prick test, skin application and nasal and bronchial provocations identify immediate allergy. There is only 1 previous report of specific binding of immunoglobulin E (IgE) to ammonium persulfate demonstrated by radioallergosorbent test (RAST). In the present study, fresh 2% ammonium and potassium persulfate solutions were used for prick testing. Patients with positive prick tests were further evaluated with open skin application, immunospot and RAST. Prick testing with persulfate salts was performed in a total of 138 patients. 7 patients had a positive reaction to at least 1 persulfate salt. 6 of the patients had had skin symptoms, urticaria, eczema or angioedema, because of contact with hair bleaches. Open application on healthy skin was performed in 4 patients, and 3 out of them had urticarial reactions. The sera of 5 patients were investigated with immunospot and RAST. On immunospot, specific binding of IgE to human serum albumin (HSA)-conjugated ammonium and potassium persulfate was found in 2 patients. 1 immunospot-positive patient also had a positive RAST to ammonium persulfate–HSA conjugate. The mechanism of immediate hypersensitivity to persulfates thus seems to be IgE-mediated at least in some patients. [ABSTRACT FROM AUTHOR]

Social anxiety disorder (SAD) is characterized by an excessive fear of social situations that can lead to serious functional impairment; it negatively affects a person's self‐esteem and social interactions. Its prevalence has increased over the past four decades, and SAD is one of the most prevalent psychiatric disorders in Japan. Therefore, more precise interventions are needed. This study administered false safety behavior elimination therapy (F‐SET), which eliminates safety behavior (i.e., strategies that reduce anxiety), to six Japanese patients with SAD. This is the first adaptation of F‐SET into Japanese. Seven patients were screened and six (Mage = 27.83 years, only males) were eligible for the study criteria. Each patient received five weekly 60‐min F‐SET sessions. At post‐F‐SET, the mean reduction in Liebowitz Social Anxiety Scale score from baseline was −20.50 (95% confidence interval: −30.65, −10.35; p =.003). After completing the treatment, all participants showed substantially decreased SAD symptoms, which indicates preliminary support for the adapted treatment's efficacy. [ABSTRACT FROM AUTHOR]