Combination of P300 and CSF β-amyloid(1-42) assays may provide a potential tool in the early diagnosis of Alzheimer's disease.
| Title | Combination of P300 and CSF β-amyloid(1-42) assays may provide a potential tool in the early diagnosis of Alzheimer's disease. |
| Publication Type | Journal Article |
| Year of Publication | 2010 |
| Authors | Papaliagkas, V. T., Anogianakis G., Tsolaki M. N., Koliakos G., & Kimiskidis V. K. |
| Journal | Curr Alzheimer Res |
| Volume | 7 |
| Issue | 4 |
| Pagination | 295-9 |
| Date Published | 2010 Jun |
| ISSN | 1875-5828 |
| Keywords | Acoustic Stimulation, Aged, Alzheimer Disease, Amyloid beta-Peptides, Auditory Pathways, Cerebral Cortex, Early Diagnosis, Electroencephalography, Enzyme-Linked Immunosorbent Assay, Event-Related Potentials, P300, Evoked Potentials, Auditory, Female, Humans, Male, Middle Aged, Peptide Fragments, Predictive Value of Tests, Prognosis, Sensitivity and Specificity, Spinal Puncture |
| Abstract | BACKGROUND/AIMS: The aim of this study was to investigate the diagnostic role of CSF beta amyloid(1-42) levels and auditory event-related potentials (AERPs) in the progression of mild cognitive impairment (MCI) to Alzheimer's disease (AD).METHODS: In fifty three MCI patients a lumbar puncture was performed and beta amyloid(1-42) levels were determined. Twenty patients were re-examined after 11 months. During this period five of them progressed to AD. Neuropsychological and ERP examinations were performed in all patients at both exams.RESULTS: Compared to MCI stable patients, AD-converters showed significantly lower beta-amyloid(1-42) values both for group 1 (Mann Whitney test, Z=-2.952, p=0.003, effect size r=-0.41) and group 2 (Z=-2.458, p=0.011; effect size r=-0.55). On the other hand, the patients of group 1 who converted to AD had prolonged latencies and lower amplitudes of the P300 wave compared to those of the MCI-stable patients, although the differences were not significant.CONCLUSIONS: Compared to the separate use of CSF beta-amyloid(1-42) and AERPs, higher values of sensitivity and specificity were achieved by the combined use of beta-amyloid(1-42) levels and P300 latencies (80% and 98%) or amplitudes (100% and 89%) in the discrimination between AD converters and MCI stable patients. Therefore the combination of an electrophysiological and a biological marker is potentially of high diagnostic value for the early diagnosis of AD converters. |
| Alternate Journal | Curr Alzheimer Res |
| PubMed ID | 19939224 |
