Effects of traumatic brain injury and posttraumatic stress disorder on development of Alzheimer's disease in Vietnam Veterans using the Alzheimer's Disease Neuroimaging Initiative: Preliminary report

Michael W. Weiner1,2,3,4,5, Danielle Harvey6, Jacqueline Hayes1, Susan M. Landau7, Paul S. Aisen8, Ronald C. Petersen9, Duygu Tosun1, Dallas P. Veitch1, Clifford R. Jack10, Charles Decarli11, Andrew J. Saykin12,13, Jordan Grafman14, Thomas C. Neylan4
1Department of Veterans Affairs Medical Center, Center for Imaging of Neurodegenerative Diseases, San Francisco, CA, USA
2Department of Radiology, University of California, San Francisco, CA, USA
3Department of Medicine, University of California, San Francisco, CA USA
4Department of Psychiatry, University of California, San Francisco, CA, USA
5Department of Neurology, University of California, San Francisco, CA, USA
6Division of Biostatistics, Department of Public Health Sciences, University of California, Davis, CA, USA
7Helen Wills Neuroscience Institute, University of California, Berkeley, CA USA
8Alzheimer's Therapeutic Research Institute, Keck School of Medicine, University of Southern California, San Diego, CA, USA
9Department of Neurology, Mayo Clinic, Rochester, MN, USA
10Department of Radiology, Mayo Clinic, Rochester, MN, USA
11Imaging of Dementia and Aging (IDeA) Laboratory, Department of Neurology and Center for Neuroscience, University of California, Davis, CA, USA
12Indiana Alzheimer Disease Center, Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, USA
13Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
14Psychiatry and Behavioral Sciences & Cognitive Neurology/Alzheimer's Disease Research Center, Feinberg School of Medicine and Department of Psychology, Northwestern University, Chicago, IL, USA

Tóm tắt

AbstractIntroductionTraumatic brain injury (TBI) and posttraumatic stress disorder (PTSD) have previously been reported to be associated with increased risk of Alzheimer's disease (AD). We are using biomarkers to study Vietnam Veterans with/without mild cognitive impairment with a history of at least one TBI and/or ongoing PTSD to determine whether these contribute to the development of AD.MethodsPotential subjects identified by Veterans Administration records underwent an initial telephone screen. Consented subjects underwent clinical evaluation, lumbar puncture, structural magnetic resonance imaging, and amyloid positron emission tomography (PET) scans.ResultsWe observed worse cognitive functioning in PTSD and TBI + PTSD groups, worse global cognitive functioning in the PTSD group, lower superior parietal volume in the TBI + PTSD group, and lower amyloid positivity in the PTSD group, but not the TBI group compared to controls without TBI/PTSD. Medial temporal lobe atrophy was not increased in the PTSD and/or TBI groups.DiscussionPreliminary results do not indicate that TBI or PTSD increase the risk for AD measured by amyloid PET. Additional recruitment, longitudinal follow‐up, and tau‐PET scans will provide more information in the future.

Tài liệu tham khảo

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