RT Journal Article
T1 The Vallecas Project: a cohort to identify early markers and mechanisms of Alzheimer’s disease
A1 Javier Olazarán, 
A1 Meritxell Valentí, 
A1 Belén Frades, 
A1 María Ascensión Zea-Sevilla, 
A1 Marina Ávila-Villanueva, 
A1 Miguel Ángel Fernández-Blázquez, 
A1 Miguel Calero, 
A1 José Luis Dobato, 
A1 Juan Antonio Hernández-Tamames, 
A1 Beatriz León-Salas, 
A1 Luis Agüera-Ortiz, 
A1 Jorge López-Álvarez, 
A1 Pedro Larrañaga, 
A1 Concha Bielza, 
A1 Juan Álvarez-Linera, 
A1 Pablo Martínez-Martín, 
AB Introduction: Alzheimer's disease (AD) is a major threat for the well-being of an increasingly aged world population. The physiopathological mechanisms of late-onset AD are multiple, possibly heterogeneous, and not well understood. Different combinations of variables from several domains (i.e., clinical, neuropsychological, structural, and biochemical markers) may predict dementia conversion, according to distinct physiopathological pathways, in different groups of subjects.Methods: We launched the Vallecas Project (VP), a cohort study of non-demented people aged 70-85, to characterize the social, clinical, neuropsychological, structural, and biochemical underpinnings of AD inception. Given the exploratory nature of the VP, multidimensional and machine learning techniques will be applied, in addition to the traditional multivariate statistical methods.Results: A total of 1169 subjects were recruited between October 2011 and December 2013. Mean age was 74.4 years (SD 3.9), 63.5% of the subjects were women, and 17.9% of the subjects were carriers of at least one ε4 allele of the apolipoprotein E gene. Cognitive diagnoses at inclusion were as follows: normal cognition 93.0% and mild cognitive impairment (MCI) 7.0% (3.1% amnestic MCI, 0.1% non-amnestic MCI, 3.8% mixed MCI). Blood samples were obtained and stored for future determinations in 99.9% of the subjects and 3T magnetic resonance imaging study was conducted in 89.9% of the volunteers. The cohort is being followed up annually for 4 years after the baseline.Conclusion: We have established a valuable homogeneous single-center cohort which, by identifying groups of variables associated with high risk of MCI or dementia conversion, should help to clarify the early physiopathological mechanisms of AD and should provide avenues for prompt diagnosis and AD prevention.
PB P. Hemachandra Reddy, Texas Tech University, USA
YR 2015
FD 2015-09-30
LK https://hdl.handle.net/20.500.14352/129919
UL https://hdl.handle.net/20.500.14352/129919
LA eng
NO Olazarán J, Valentí M, Frades B, Zea-Sevilla MA, Ávila-Villanueva M, Fernández-Blázquez MÁ, Calero M, Dobato JL, Hernández-Tamames JA, León-Salas B, Agüera-Ortiz L, López-Álvarez J, Larrañaga P, Bielza C, Álvarez-Linera J, Martínez-Martín P. The Vallecas Project: A Cohort to Identify Early Markers and Mechanisms of Alzheimer's Disease. Front Aging Neurosci. 2015 Sep 30;7:181. doi: 10.3389/fnagi.2015.00181.
NO Fundación CIEN (España)
NO Fundación Reina Sofía (España)
DS Docta Complutense
RD 18 mar 2026