Posttraumatic stress disorder (PTSD) is a prevalent anxiety disorder marked by behavioral, physiologic, and hormonal alterations. The etiology of PTSD is unknown, although exposure to a traumatic event constitutes a necessary, but not sufficient, factor. Serotonergic dysfunction has been implicated in PTSD. The present study examined the possible association between the serotonin-transporter-linked polymorphic region (SERTPR) and PTSD. The genotype and allele frequencies of the SERTPR were analyzed in 100 PTSD patients and 197 unrelated healthy controls using a case-control design. The frequency of the s/s genotype was significantly higher in PTSD patients than in normal controls. These findings suggest that the SERTPR s/s genotype is one of the genetic factors for the susceptibility to PTSD. Further investigations are required into the influence of gene polymorphisms on the biological mechanisms of PTSD, its clinical expression, and its response to treatment.

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Taijin-Kyofu-Sho (TKS), an East Asian syndrome of interpersonal fear and avoidance, that has been considered culture-bound, overlaps with social anxiety disorder to an unknown extent. The offensive subtype of TKS is characterized by two features considered atypical of social anxiety disorder: the belief that one displays physical defects and/or socially inappropriate behaviors (offensive TKS symptoms) and fear of offending others (allocentric focus), but no studies have systematically evaluated these two features in patients with social anxiety disorder. The purpose of this study was to assess offensive TKS symptoms and allocentric focus of fear in US (n = 181) and Korean (n = 64) patients with DSM-IV social anxiety disorder, using the newly developed TKS Questionnaire. Seventy-five percent of patients with social anxiety disorder in the US and Korea endorsed at least one of the five offensive TKS symptoms surveyed. The severity of features of offensive TKS was significantly associated with severity of social anxiety symptoms, depressive symptoms, and disability in both samples. These results suggest that features of the offensive subtype of TKS are not uncommon among US patients with social anxiety disorder and may not be as culturally specific as previously believed. They also suggest that Western clinicians should assess patients with social anxiety for features of offensive TKS, and they support further consideration of integrating TKS features into conceptualizations of social anxiety disorder.

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