Left frontal lobe hypoperfusion and depressive symptoms in Alzheimer's disease patients taking cholinesterase inhibitors

Etsuko Oshima, Seishi Terada, Shuhei Sato, Chikako Ikeda, Koji Oda, Shinichiro Inoue, Kiyohiro Kawada, Osamu Yokota, Yosuke Uchitomi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Depressive symptoms are common in patients with Alzheimer's disease (AD) and increase the caregiver burden. Many studies have reported dorsolateral prefrontal hypometabolism or hypoperfusion in AD patients with depressive symptoms, most of whom did not take acetylcholinesterase inhibitors (AChEI). It is not clear, however, whether a similar condition is present in patients taking AChEI medication. Fifty-seven consecutive AD patients taking AChEI were recruited at a memory clinic. Objective depressive symptoms were evaluated using the depression domain of the Neuropsychiatric Inventory (NPI-dep). All patients underwent brain single photon emission computed tomography (SPECT) with 99mTc-ethylcysteinate dimer, and the SPECT images were analyzed using the Statistical Parametric Mapping 8 program. No significant differences between groups with positive and negative NPI-dep scores were found with respect to age, sex, years of education, and cognitive function. Compared with patients with negative NPI-dep scores, patients with NPI-dep scores ≥1 showed significant hypoperfusion in the left middle frontal region. Our results indicate that the dorsolateral prefrontal area is significantly involved in the pathogenesis of depressive symptoms in AD patients being treated with AChEI. The area on the left side especially may be closely related to the depressive symptoms evaluated using the NPI.

Original languageEnglish
Pages (from-to)319-323
Number of pages5
JournalPsychiatry Research - Neuroimaging
Volume224
Issue number3
DOIs
Publication statusPublished - 2014

Keywords

  • Acetylcholine esterase inhibitor (AChEI)
  • Alzheimer's disease
  • Depression
  • Neuropsychiatric inventory (NPI)
  • Regional cerebral blood flow (rCBF)

ASJC Scopus subject areas

  • Neuroscience (miscellaneous)
  • Radiology Nuclear Medicine and imaging
  • Psychiatry and Mental health

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