Platelet a disintegrin and metallopeptidase 10 expression correlates with clock drawing test scores in Alzheimer's disease
Version of Record online: 22 AUG 2013
Copyright © 2013 John Wiley & Sons, Ltd.
International Journal of Geriatric Psychiatry
Volume 29, Issue 4, pages 414–420, April 2014
How to Cite
Manzine, P. R., Barham, E. J., Vale, F. A. C., Selistre-de-Araújo, H. S., Pavarini, S. C. I. and Cominetti, M. R. (2014), Platelet a disintegrin and metallopeptidase 10 expression correlates with clock drawing test scores in Alzheimer's disease. Int. J. Geriat. Psychiatry, 29: 414–420. doi: 10.1002/gps.4020
- Issue online: 6 MAR 2014
- Version of Record online: 22 AUG 2013
- Manuscript Accepted: 30 JUL 2013
- Manuscript Received: 29 MAY 2013
- Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP). Grant Number: (2010/09497-7)
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
- Alzheimer's disease;
- clock drawing test;
- elderly patients
Earlier studies have demonstrated that a disintegrin and metallopeptidase 10 (ADAM10) levels are reduced in Alzheimer's disease (AD) patients compared with healthy subjects. The objective of this study was to evaluate whether platelet ADAM10 levels correlates with the clock drawing test (CDT) scores, which is a simple and a reliable measure of visuospatial ability and executive function in AD patients.
Thirty elderly patients with probable AD and 25 healthy patients forming the control group, matched by age, gender, and educational level, were evaluated. Platelet proteins were analyzed by sodium dodecyl sulfate polyacrylamide gel electrophoresis, and ADAM10 was identified by western blotting. The Spearman's correlation coefficient between ADAM10 and CDT was obtained for each group. The areas under the curves were used to compare the receiver operating characteristic curves.
The CDT scores and platelet ADAM10 expression were significantly different between patients with AD and controls and also along the disease's progression. In AD patients, there was a positive correlation between ADAM10 expression and CDT scores. Among non-AD subjects, no correlation was found. The combination of ADAM10 and CDT was significantly better to confirm the AD diagnosis than the AUCs of ADAM10 and CDT separately.
The association of blood-based biomarkers, such as ADAM10, and cognitive tests may be helpful for a more reliable AD diagnosis. Copyright © 2013 John Wiley & Sons, Ltd.