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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Prohovnik, I. Sorbi, S. Mosconi, L. Bracco, L. Nacmias, B. De Cristofaro, M. T. R. Herholz, K. Fayyaz, M. Pupi, A. |
| Description | Country affiliation: Italy Author Affiliation: Mosconi L ( Department of Clinical Pathophysiology, Nuclear Medicine Unit, University of Florence, viale Morgagni 85, 50134 Florence, Italy.) |
| Abstract | BACKGROUND: Clinically apparent Alzheimer's disease (AD) is thought to result when brain tissue damage exceeds a critical threshold of 'brain reserve', a process possibly accelerated by the apolipoprotein E (ApoE) E4 allele. The interaction between onset age and ApoE genotype was investigated to assess whether early disease onset (<65 years) in patients carrying the E4 allele is associated with greater cerebral metabolic (regional cerebral metabolic rate of glucose utilisation, rCMRgl) reduction. METHODS: AD patients, divided into early (EOAD; 27 patients) and late onset (LOAD; 65 patients) groups, both groups balanced as to the number of E4 carriers (E4+) and non-carriers (E4-), and matched controls (NC; 35 cases) underwent (18)F-FDG PET ([(18)F]fluorodeoxyglucose positron emission tomography) scanning. SPM'99 software was used to compare AD patients to NC and to perform a two way ANOVA with onset age and ApoE genotype as grouping factors. Results were considered significant at p<0.001, uncorrected. RESULTS: AD patients demonstrated rCMRgl reductions compared to NC, with rCMRgl lower in association cortex and relatively higher in limbic areas in EOAD compared to LOAD subjects. rCMRgl was lower in the anterior cingulate and frontal cortex for E4+ compared to E4- subjects. A significant onset age by ApoE interaction was detected in the hippocampi and basal frontal cortex, with EOAD E4+ subjects having the greatest rCMRgl reduction. CONCLUSIONS: The interactive effects of early onset age, possibly reflecting lower brain reserve, and ApoE E4 allele, possibly leading to greater tissue damage, lead to reduced tolerance to the pathophysiological effects of AD in key brain regions. |
| ISSN | 00223050 |
| e-ISSN | 1468330X |
| Journal | Journal of Neurology, Neurosurgery & Psychiatry |
| Issue Number | 1 |
| Volume Number | 76 |
| Language | English |
| Publisher | BMJ Publishing Group Ltd. |
| Publisher Date | 2005-01-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Age Of Onset Alzheimer Disease Genetics Metabolism Apolipoproteins E Brain Case-control Studies Fluorodeoxyglucose F18 Pharmacokinetics Genotype Positron-emission Tomography Radiopharmaceuticals Research Support, Non-u.s. Gov't Discipline Neurology Discipline Neurosurgery Discipline Psychiatry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neurology (clinical) Surgery Psychiatry and Mental Health |
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