| Title | Associations between Neuropsychiatric Symptoms and Cerebral Amyloid Deposition in Cognitively Impaired Elderly People. |
| Publication Type | Journal Article |
| Year of Publication | 2016 |
| Authors | Bensamoun, D, Guignard, R, Furst, AJ, Derreumaux, A, Manera, V, Darcourt, J, Benoit, M, Robert, PH, David, R |
| Journal | J Alzheimers Dis |
| Volume | 49 |
| Issue | 2 |
| Pagination | 387-98 |
| Date Published | 2016 |
| ISSN | 1875-8908 |
| Keywords | Aged, Aged, 80 and over, Alzheimer Disease, Amyloidogenic Proteins, Cerebral Cortex, Cognition Disorders, Cohort Studies, Female, Fluorodeoxyglucose F18, Humans, Male, Mental Status Schedule, Mood Disorders, Neuropsychological Tests, Positron-Emission Tomography |
| Abstract | BACKGROUND: Neuropsychiatric symptoms, also known as behavioral and psychological symptoms of dementia (BPSD), affect the majority of patients with dementia, and result in a greater cognitive and functional impairment. OBJECTIVE: To investigate associations between BPSD and amyloid cerebral deposition as measured by 18F-Florbetapir-PET quantitative uptake in elderly subjects with and without cognitive impairment. METHODS: Participants with cognitive impairment [mild cognitive impairment (MCI) or Alzheimer's disease (AD)] and healthy controls (HC) from the ADNI cohort (Alzheimer Disease Neuroimaging Initiative) who underwent an 18F-florbetapir PET scan between May 2010 and March 2014 were included. Clinical assessments included the Clinical Dementia Rating, the Mini-Mental State Examination (MMSE), and the Neuropsychiatric Inventory. Freesurfer software was used to extract PET counts based on T1-based structural ROI (frontal, cingulate, parietal, and temporal). Spearman's partial correlation scores between BPSD severity and regional amyloid uptake were calculated. RESULTS: Data for 657 participants [age = 72.6 (7.19); MMSE = 27.4 (2.67)] were analyzed, including 230 HC [age = 73.1 (6.02); MMSE = 29 (1.21)], 308 MCI [age = 71.5 (7.44); MMSE = 28.0 (1.75)], and 119 AD subjects [age = 74.7 (8.05); MMSE = 23.1 (2.08)]. Considering all diagnostic groups together, positive significant correlations were found between anxiety and 18F-florbetapir uptake in the frontal (r = 0.102; p = 0.009), cingulate (r = 0.083; p = 0.034), and global cerebral uptake (r = 0.099; p = 0.011); between irritability and frontal (r = 0.089; p = 0.023), cingulate (r = 0.085; p = 0.030), parietal (r = 0.087; p = 0.025), and global cerebral uptake (r = 0.093; p = 0.017); in the MCI subgroup, between anxiety and frontal (r = 0.126; p = 0.03) and global uptake (r = 0.14; p = 0.013); in the AD subgroup, between irritability and parietal uptake (r = 0.201; p = 0.03). CONCLUSION: Anxiety and irritability are associated with greater amyloid deposition in the neurodegenerative process leading to AD. |
| DOI | 10.3233/JAD-150181 |
| Alternate Journal | J. Alzheimers Dis. |
| PubMed ID | 26484900 |
| Grant List | U01 AG024904 / AG / NIA NIH HHS / United States |
