Erlend Bøen1, Lars T Westlye2, Torbjørn Elvsåshagen3, Benjamin Hummelen4, Per K Hol5, Birgitte Boye6, Stein Andersson7, Sigmund Karterud8, Ulrik F Malt1. 1. Department of Psychosomatic Medicine, Oslo University Hospital, Oslo; Norwegian Research Network On Mood Disorders, Oslo; and Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway. 2. K.G. Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital, OsloDepartment of Psychology, University of Oslo, Oslo, Norway. 3. Department of Psychosomatic Medicine, Oslo University Hospital, Oslo Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway. 4. Department for Personality Psychiatry, Division of Mental Health and Addiction, Oslo University Hospital, OsloDepartment for Research and Education, Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway. 5. The Intervention Centre, Oslo University Hospital, Oslo, Norway. 6. Department of Psychosomatic Medicine, Oslo University Hospital, Oslo, Norway. 7. Department of Psychosomatic Medicine, Oslo University Hospital, Oslo Department of Psychology, University of Oslo, Oslo, Norway. 8. Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo Department for Personality Psychiatry, Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway.
Abstract
BACKGROUND: Animal and human studies have suggested that hippocampal subfields are differentially vulnerable to stress, but subfield volume has not been investigated in patients with borderline personality disorder (BPD). Based on the putative role of stressful life events as vulnerability factors for BPD, we hypothesized that patients with BPD would exhibit reduced volumes for the stress-sensitive dentate gyrus (DG) and the cornu ammonis (CA) 3 subfields volumes, and that these volumes would be associated with traumatic childhood experiences. METHODS: All participants underwent 3 T magnetic resonance imaging. Hippocampal subfield volumes were estimated using an automated and validated segmentation algorithm implemented in FreeSurfer. Age and total subcortical grey matter volume were covariates. We assessed traumatic childhood experiences using the Childhood Trauma Questionnaire (CTQ). RESULTS: A total of 18 women with BPD and 21 healthy control women were included in the study. Only 1 patient had comorbid posttraumatic stress disorder (PTSD). The volumes of the left (p = 0.005) and right (p = 0.011) DG-CA4 and left (p = 0.007) and right (p = 0.005) CA2-3 subfields were significantly reduced in patients compared with controls. We also found significant group differences for the left (p = 0.032) and right (p = 0.028) CA1, but not for other hippocampal subfields. No associations were found between CTQ scores and subfield volumes. LIMITATIONS: The self-reported CTQ might be inferior to more comprehensive assessments of traumatic experiences. The sample size was moderate. CONCLUSION: The volumes of stress-sensitive hippocampal subfields are reduced in women with BPD without PTSD. However, the degree to which childhood trauma is responsible for these changes is unclear.
BACKGROUND: Animal and human studies have suggested that hippocampal subfields are differentially vulnerable to stress, but subfield volume has not been investigated in patients with borderline personality disorder (BPD). Based on the putative role of stressful life events as vulnerability factors for BPD, we hypothesized that patients with BPD would exhibit reduced volumes for the stress-sensitive dentate gyrus (DG) and the cornu ammonis (CA) 3 subfields volumes, and that these volumes would be associated with traumatic childhood experiences. METHODS: All participants underwent 3 T magnetic resonance imaging. Hippocampal subfield volumes were estimated using an automated and validated segmentation algorithm implemented in FreeSurfer. Age and total subcortical grey matter volume were covariates. We assessed traumatic childhood experiences using the Childhood Trauma Questionnaire (CTQ). RESULTS: A total of 18 women with BPD and 21 healthy control women were included in the study. Only 1 patient had comorbid posttraumatic stress disorder (PTSD). The volumes of the left (p = 0.005) and right (p = 0.011) DG-CA4 and left (p = 0.007) and right (p = 0.005) CA2-3 subfields were significantly reduced in patients compared with controls. We also found significant group differences for the left (p = 0.032) and right (p = 0.028) CA1, but not for other hippocampal subfields. No associations were found between CTQ scores and subfield volumes. LIMITATIONS: The self-reported CTQ might be inferior to more comprehensive assessments of traumatic experiences. The sample size was moderate. CONCLUSION: The volumes of stress-sensitive hippocampal subfields are reduced in women with BPD without PTSD. However, the degree to which childhood trauma is responsible for these changes is unclear.
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