RT Journal Article
SR Electronic
T1 Apathy correlates with prefrontal amyloid β deposition in Alzheimer's disease
JF Journal of Neurology, Neurosurgery & Psychiatry
JO J Neurol Neurosurg Psychiatry
FD BMJ Publishing Group Ltd
SP 449
OP 455
DO 10.1136/jnnp-2013-306110
VO 85
IS 4
A1 Takaaki Mori
A1 Hitoshi Shimada
A1 Hitoshi Shinotoh
A1 Shigeki Hirano
A1 Yoko Eguchi
A1 Makiko Yamada
A1 Ryuji Fukuhara
A1 Satoshi Tanimukai
A1 Ming-Rong Zhang
A1 Satoshi Kuwabara
A1 Shu-ichi Ueno
A1 Tetsuya Suhara
YR 2014
UL http://jnnp.bmj.com/content/85/4/449.abstract
AB Objective Neuropsychiatric symptoms affect many patients with Alzheimer's disease (AD). (11C)Pittsburgh Compound-B (PIB) positron emission tomography (PET) has enabled the in vivo visualisation of brain amyloid-β (Aβ) deposition. This study exploratively investigated the correlation between brain Aβ deposition measured by (11C)PIB PET and neuropsychiatric symptoms in AD. Methods Participants were 28 patients (15 women, 13 men) with PIB-positive AD. Clinical assessments included Mini-Mental State Examination, Clinical Dementia Rating scale, neuropsychiatry inventory (NPI) and frontal assessment battery. All patients underwent three-dimensional T1-weighted MRI and (11C)PIB PET. The distribution volume ratio (DVR), an index of (11C)PIB retention and, thus, Aβ deposition, was estimated voxel by voxel from (11C)PIB PET data with partial volume correction. Voxel-based correlation analysis was performed to assess the relationships between DVR and each NPI subscale. Additionally, voxel-based analysis of covariance (ANCOVA) of the DVR images was performed between Patients with AD with and without each neuropsychiatric symptom. Voxel-based morphometry analysis of MRI was also performed. Results Apathy subscale was correlated with (11C)PIB retention in the bilateral frontal and right anterior cingulate. (11C)PIB retention was greater in the bilateral frontal cortex of patients with AD with apathy than those of without apathy. Overlapping areas between the two analyses were the bilateral orbitofrontal gyrus and left superior frontal gyrus. Other NPI subscales were not correlated with (11C)PIB retention. Voxel-based morphometry analysis of MRI showed no significant cluster of correlation between grey matter volume and NPI subscales. Conclusions This study revealed that prefrontal Aβ deposition correlates with apathy.