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Home > Analyses of Clinical Features and Investigations on Potential Mechanisms in Patients with Alzheimer's Disease and Olfactory Dysfunction.

TitleAnalyses of Clinical Features and Investigations on Potential Mechanisms in Patients with Alzheimer's Disease and Olfactory Dysfunction.
Publication TypeJournal Article
Year of Publication2018
AuthorsZuo, L-J, Guo, P, Liu, L, Yu, S-Y, Lian, T-H, Yu, Q-J, Hu, Y, Jin, Z, Wang, R-D, Piao, Y-S, Li, L-X, Wang, Y-J, Wang, X-M, Zhang, W
JournalJ Alzheimers Dis
Volume66
Issue2
Pagination789-799
Date Published2018
ISSN1875-8908
Abstract

BACKGROUND: OD is common in patients with Alzheimer's disease (AD). However, the relationship between OD and clinical symptoms and the potential mechanisms of OD in AD patients are still unknown.

OBJECTIVE: To explore the relationship between OD and clinical symptoms and the potential mechanisms of OD in AD patients.

METHODS: We evaluated OD using the Hyposmia Rating Scale (HRS), classified patients into AD with OD (AD-OD) and AD with no OD (AD-NOD) groups, and detected the levels of free radicals and inflammatory factors, including hydroxyl radical (•OH), hydrogen peroxide (H2O2), nitric oxide, interleukin-1β, interleukin-6, tumor necrosis factor-α, and prostaglandin E2 in serum from AD patients.

RESULTS: It was shown that the scores of the Mini-Mental State Examination, Animal Fluency Test, Boston Naming Test (BNT), and Auditory Verbal Learning Test-delayed recall were all significantly lower and the score of overall activity of daily living (ADL) and instrumental ADL were significantly higher in AD-OD group than those in AD-NOD group. Compared with AD-NOD group, •OH level in serum was prominently elevated, and H2O2 level was dramatically declined in AD-OD group. In the correlation analysis, HRS score was significantly and positively correlated with the score of BNT, and negatively correlated with •OH level in serum.

CONCLUSIONS: AD-OD patients suffered from severe cognitive impairment in the domain of language. Oxidative stress might be correlated with AD-OD featured by the drastically increased •OH level in serum.

DOI10.3233/JAD-180425
Alternate JournalJ. Alzheimers Dis.
PubMed ID30347619
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