Document Detail


The dopaminergic neurotransmitter system is associated with aggression and agitation in frontotemporal dementia.
MedLine Citation:
PMID:  18093695     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To identify neurochemical correlates of behavioral and psychological signs and symptoms of dementia (BPSD), we set up a prospective study. Patients with probable Alzheimer's disease (AD) (n=181), mixed dementia (MXD) (n=28), frontotemporal dementia (FTD) (n=25) and dementia with Lewy bodies (DLB) (n=24) were included. At inclusion, all patients underwent lumbar puncture, neuropsychological examination and behavioral assessment (battery of behavioral assessment scales). Cerebrospinal fluid (CSF) levels of norepinephrine and of (nor)epinephrine (MHPG), serotonin (5HIAA) and dopamine (DOPAC, HVA) metabolites were determined by HPLC and electrochemical detection. Spearman Rank-Order followed by Bonferroni correction was used for calculating correlations. In FTD patients, CSF norepinephrine levels were positively correlated with dementia severity (r=0.539; p=0.021). CSF DOPAC levels were correlated with BPSD in general (r=0.537; p=0.007), associated caregiver burden (r=0.567; p=0.004) and agitated and aggressive behavior (r=0.568; p=0.004). In a subgroup of FTD patients who did not receive psychotropic pharmacological treatment, a strong correlation between CSF HVA/5HIAA ratios (reflecting serotonergic modulation of dopaminergic neurotransmission) and aggressive behavior (r=0.758; p=0.009) was found. In MXD patients, (verbally) agitated behavior was positively associated with the turnover of norepinephrine (r=0.633; p=0.002). No significant correlations were found in AD and DLB groups. In FTD, increased activity of dopaminergic neurotransmission and altered serotonergic modulation of dopaminergic neurotransmission is associated with agitated and aggressive behavior respectively. This study demonstrated that neurochemical mechanisms underlying the pathophysiology of BPSD are both BPSD-specific and disease-specific which might have implications for future development of new and more selective pharmacological treatments of BPSD.
Authors:
Sebastiaan Engelborghs; Ellen Vloeberghs; Nathalie Le Bastard; Michael Van Buggenhout; Peter Mariën; Nore Somers; Guy Nagels; Barbara A Pickut; Peter P De Deyn
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-11-04
Journal Detail:
Title:  Neurochemistry international     Volume:  52     ISSN:  0197-0186     ISO Abbreviation:  Neurochem. Int.     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-03-31     Completed Date:  2008-07-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8006959     Medline TA:  Neurochem Int     Country:  England    
Other Details:
Languages:  eng     Pagination:  1052-60     Citation Subset:  IM    
Affiliation:
Department of Neurology and Memory Clinic, Middelheim General Hospital (ZNA), Antwerp, Belgium.
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MeSH Terms
Descriptor/Qualifier:
Aged
Aged, 80 and over
Aggression / physiology*
Alzheimer Disease / metabolism,  physiopathology
Brain / metabolism*,  physiopathology
Brain Chemistry / physiology
Chromatography, High Pressure Liquid
Dementia / cerebrospinal fluid*,  complications,  physiopathology
Dopamine / analysis,  cerebrospinal fluid*
Epinephrine / analysis,  cerebrospinal fluid
Female
Humans
Lewy Body Disease / metabolism,  physiopathology
Male
Mental Disorders / cerebrospinal fluid*,  etiology,  physiopathology
Neuropsychological Tests
Norepinephrine / analysis,  cerebrospinal fluid
Prospective Studies
Psychomotor Agitation / cerebrospinal fluid*,  etiology,  physiopathology
Serotonin / analysis,  cerebrospinal fluid
Synaptic Transmission / physiology
Chemical
Reg. No./Substance:
50-67-9/Serotonin; 51-41-2/Norepinephrine; 51-43-4/Epinephrine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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