Browsing by Author "Operto, Grégory"

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  • Age, sex and APOE-ε4 modify the balance between soluble and fibrillar β-amyloid in non-demented individuals: topographical patterns across two independent cohorts
    Cacciaglia, Raffaele; Salvadó, Gemma; Molinuevo, José Luis; Shekari, Mahnaz; Falcón, Carles; Operto, Grégory; Suárez-Calvet, Marc; Milà Alomà, Marta; Sala, Arianna; Rodriguez-Vieitez, Elena; Kollmorgen, Gwendlyn; Suridjan, Ivonne; Blennow, Kaj; Zetterberg, Henrik; Gispert López, Juan Domingo; Alzheimer’s Disease Neuroimaging Initiative; ALFA Study (Nature Research, 2022)
    Amyloid (Aβ) pathology is the earliest detectable pathophysiological event along the Alzheimer's continuum, which can be measured both in the cerebrospinal fluid (CSF) and by Positron Emission Tomography (PET). Yet, these ...
  • Amyloid-β positive individuals with subjective cognitive decline present increased CSF neurofilament light levels that relate to lower hippocampal volume
    Sánchez Benavides, Gonzalo; Suárez-Calvet, Marc; Milà Alomà, Marta; Arenaza Urquijo, Eider M.; Grau-Rivera, Oriol; Operto, Grégory; Domingo Gispert, Juan; Vilor Tejedor, Natàlia, 1988-; Sala Vila, Aleix; Crous-Bou, Marta; González de Echávarri, José Maria; Minguillón, Carolina; Fauria, Karine; Simon, Maryline; Kollmorgen, Gwendlyn; Zetterberg, Henrik; Blennow, Kaj; Molinuevo, José Luis; ALFA Study (Elsevier, 2021)
    Neurofilament light chain (NfL) is an axonal protein that when measured in cerebrospinal fluid (CSF) serves as a biomarker of neurodegeneration. We aimed at investigating the association among CSF NfL, presence of Subjective ...
  • Association between insomnia and cognitive performance, gray matter volume, and white matter microstructure in cognitively unimpaired adults
    Grau-Rivera, Oriol; Operto, Grégory; Falcón, Carles; Sánchez Benavides, Gonzalo; Cacciaglia, Raffaele; Brugulat Serrat, Anna, 1986-; Gramunt Fombuena, Nina; Salvadó, Gemma; Suárez-Calvet, Marc; Minguillón, Carolina; Iranzo, Alex; Gispert López, Juan Domingo; Molinuevo, José Luis; ALFA Study (BioMed Central, 2020)
    Background: Mounting evidence links poor sleep quality with a higher risk of late-life dementia. However, the structural and cognitive correlates of insomnia are still not well understood. The study aims were to characterize ...
  • Brain correlates of urban environmental exposures in cognitively unimpaired individuals at increased risk for Alzheimer's disease: A study on Barcelona's population
    Falcón, Carles; Gascon Merlos, Mireia, 1984-; Molinuevo, José Luis; Operto, Grégory; Cirach, Marta; Gotsens, Xavier; Fauria, Karine; Arenaza Urquijo, Eider M.; Pujol Martí, Jesús, 1981-; Sunyer Deu, Jordi; Nieuwenhuijsen, Mark J.; Gispert López, Juan Domingo; Crous-Bou, Marta; ALFA Study (Wiley, 2021)
    Introduction: Urban environmental exposures might contribute to the incidence of Alzheimer's disease (AD). Our aim was to identify structural brain imaging correlates of urban environmental exposures in cognitively unimpaired ...
  • Cognitively unimpaired individuals with a low burden of Aβ pathology have a distinct CSF biomarker profile
    Milà Alomà, Marta; Shekari, Mahnaz; Salvadó, Gemma; Gispert López, Juan Domingo; Arenaza Urquijo, Eider M.; Operto, Grégory; Falcón, Carles; Vilor Tejedor, Natàlia, 1988-; Grau-Rivera, Oriol; Sala Vila, Aleix; Sánchez Benavides, Gonzalo; González de Echávarri, José Maria; Minguillón, Carolina; Suárez-Calvet, Marc; Molinuevo, José Luis; ALFA Study (BioMed Central, 2021)
    Background: Understanding the changes that occur in the transitional stage between absent and overt amyloid-β (Aβ) pathology within the Alzheimer's continuum is crucial to develop therapeutic and preventive strategies. The ...
  • CSF synaptic biomarkers in the preclinical stage of Alzheimer disease and their association with MRI and PET: a cross-sectional study
    Milà Alomà, Marta; Brinkmalm, Ann; Ashton, Nicholas J.; Kvartsberg, Hlin; Shekari, Mahnaz; Operto, Grégory; Salvadó, Gemma; Falcon, Carles; Domingo Gispert, Juan; Vilor Tejedor, Natàlia, 1988-; Arenaza Urquijo, Eider M.; Grau-Rivera, Oriol; Sala Vila, Aleix; Sanchez-Benavides, Gonzalo; González de Echávarri, José Maria; Minguillón, Carolina; Fauria, Karine; Niñerola-Baizán, Aida; Perissinotti, Andrés; Kollmorgen, Gwendlyn; Suridjan, Ivonne; Zetterberg, Henrik; Molinuevo, José Luis; Blennow, Kaj; Suárez-Calvet, Marc; ALFA Study (Lippincott Williams & Wilkins, 2021)
    Background and objectives: To determine whether CSF synaptic biomarkers are altered in the early preclinical stage of the Alzheimer continuum and associated with Alzheimer disease (AD) risk factors, primary pathology, and ...
  • DHA intake relates to better cerebrovascular and neurodegeneration neuroimaging phenotypes in middle-aged adults at increased genetic risk of Alzheimer disease
    Sala Vila, Aleix; Arenaza Urquijo, Eider M.; Sánchez Benavides, Gonzalo; Suárez-Calvet, Marc; Milà Alomà, Marta; Grau-Rivera, Oriol; González de Echávarri, José Maria; Crous-Bou, Marta; Minguillón, Carolina; Fauria, Karine; Operto, Grégory; Falcón, Carles; Salvadó, Gemma; Cacciaglia, Raffaele; Ingala, Silvia; Barkhof, Frederik; Schröder, Helmut, 1958-; Scarmeas, Nikolaos; Gispert López, Juan Domingo; Molinuevo, José Luis; ALFA Study (American Society for Nutrition, 2021)
    Background: The number of APOE-ε4 alleles is a major nonmodifiable risk factor for sporadic Alzheimer disease (AD). There is increasing evidence on the benefits of dietary DHA (22:6n-3) before the onset of AD symptoms, ...
  • Effect of BDNF Val66Met on hippocampal subfields volumes and compensatory interaction with APOE-ε4 in middle-age cognitively unimpaired individuals from the ALFA study
    Vilor Tejedor, Natàlia, 1988-; Operto, Grégory; Evans, Tavia E.; Falcón, Carles; Crous-Bou, Marta; Minguillón, Carolina; Cacciaglia, Raffaele; Milà Alomà, Marta; Grau-Rivera, Oriol; Suárez-Calvet, Marc; Garrido Martín, Diego, 1992-; Morán, Sebastián; Esteller, Manel; Adams, Hieab H.; Molinuevo, José Luis; Guigó Serra, Roderic; Gispert López, Juan Domingo; ALFA Study (Springer, 2020)
    Background: Current evidence supports the involvement of brain-derived neurotrophic factor (BDNF) Val66Met polymorphism, and the ε4 allele of APOE gene in hippocampal-dependent functions. Previous studies on the association ...
  • Genetic influences on hippocampal subfields: an emerging area of neuroscience research
    Vilor Tejedor, Natàlia, 1988-; Evans, Tavia E.; Adams, Hieab H.; González de Echávarri, José Maria; Molinuevo, José Luis; Guigó Serra, Roderic; Gispert López, Juan Domingo; Operto, Grégory (Wolters Kluwer (LWW), 2021)
    There is clear evidence that hippocampal subfield volumes have partly distinct genetic determinants associated with specific biological processes. The identification of genetic correlates of hippocampal subfield volumes ...
  • Genetic predisposition to Alzheimer's disease is associated with enlargement of perivascular spaces in centrum semiovale region
    Ciampa, Iacopo; Operto, Grégory; Falcón, Carles; Minguillón, Carolina; Castro de Moura, Manuel; Piñeyro, David; Esteller, Manel; Molinuevo, José Luis; Guigó Serra, Roderic; Navarro i Cuartiellas, Arcadi, 1969-; Gispert López, Juan Domingo; Vilor Tejedor, Natàlia, 1988-; ALFA Study (MDPI, 2021)
    This study investigated whether genetic factors involved in Alzheimer's disease (AD) are associated with enlargement of Perivascular Spaces (ePVS) in the brain. A total of 680 participants with T2-weighted MRI scans and ...
  • Genetically predicted telomere length and Alzheimer's disease endophenotypes: a Mendelian randomization study
    Rodríguez-Fernández, Blanca; Vilor Tejedor, Natàlia, 1988-; Arenaza Urquijo, Eider M.; Sánchez Benavides, Gonzalo; Suárez-Calvet, Marc; Operto, Grégory; Minguillón, Carolina; Navarro i Cuartiellas, Arcadi, 1969-; Gispert López, Juan Domingo; Sala Vila, Aleix; ALFA Study (BioMed Central, 2022)
    Telomere length (TL) is associated with biological aging, consequently influencing the risk of age-related diseases such as Alzheimer's disease (AD). We aimed to evaluate the potential causal role of TL in AD endophenotypes ...
  • Genotypic effects of APOE-ε4 on resting-state connectivity in cognitively intact individuals support functional brain compensation
    Cacciaglia, Raffaele; Operto, Grégory; Falcón, Carles; González de Echávarri, José Maria; Sánchez Benavides, Gonzalo; Brugulat Serrat, Anna, 1986-; Milà Alomà, Marta; Blennow, Kaj; Zetterberg, Henrik; Molinuevo, José Luis; Suárez-Calvet, Marc; Gispert López, Juan Domingo; ALFA Study (Oxford University Press, 2022)
    The investigation of resting-state functional connectivity (rsFC) in asymptomatic individuals at genetic risk for Alzheimer's disease (AD) enables discovering the earliest brain alterations in preclinical stages of the ...
  • NeAT: a nonlinear analysis toolbox for neuroimaging
    Casamitjana, Adrià; Vilaplana, Verónica; Puch, Santi; Aduriz, Asier; López, Carlos; Operto, Grégory; Cacciaglia, Raffaele; Falcón, Carles; Molinuevo, José Luis; Domingo Gispert, Juan; Alzheimer’s Disease Neuroimaging Initiative (SpringerOpen, 2021)
    NeAT is a modular, flexible and user-friendly neuroimaging analysis toolbox for modeling linear and nonlinear effects overcoming the limitations of the standard neuroimaging methods which are solely based on linear models. ...
  • Nonlinear interaction between APOE ε4 allele load and age in the hippocampal surface of cognitively intact individuals
    Martí Juan, Gerard; Sanromà, Gerard; Cacciaglia, Raffaele; Falcón, Carles; Operto, Grégory; Molinuevo, José Luis; González Ballester, Miguel Ángel, 1973-; Domingo Gispert, Juan; Piella Fenoy, Gemma; Alzheimer’s Disease Neuroimaging Initiative; ALFA Study (Wiley, 2020)
    The ε4 allele of the gene Apolipoprotein E is the major genetic risk factor for Alzheimer's Disease. APOE ε4 has been associated with changes in brain structure in cognitively impaired and unimpaired subjects, including ...
  • Perivascular spaces are associated with tau pathophysiology and synaptic dysfunction in early Alzheimer's continuum
    Vilor Tejedor, Natàlia, 1988-; Ciampa, Iacopo; Operto, Grégory; Falcón, Carles; Suárez-Calvet, Marc; Crous-Bou, Marta; Shekari, Mahnaz; Arenaza Urquijo, Eider M.; Milà Alomà, Marta; Grau-Rivera, Oriol; Minguillón, Carolina; Kollmorgen, Gwendlyn; Zetterberg, Henrik; Blennow, Kaj; Guigó Serra, Roderic; Molinuevo, José Luis; Gispert López, Juan Domingo; ALFA Study (BioMed Central, 2021)
    Background: Perivascular spaces (PVS) have an important role in the elimination of metabolic waste from the brain. It has been hypothesized that the enlargement of PVS (ePVS) could be affected by pathophysiological mechanisms ...
  • Prediction of amyloid pathology in cognitively unimpaired individuals using voxel-wise analysis of longitudinal structural brain MRI
    Petrone, Paula M.; Casamitjana, Adrià; Falcón, Carles; Artigues, Miquel; Operto, Grégory; Cacciaglia, Raffaele; Molinuevo, José Luis; Vilaplana, Verónica; Gispert López, Juan Domingo; Alzheimer’s Disease Neuroimaging Initiative (BioMed Central, 2019)
    Background: Magnetic resonance imaging (MRI) has unveiled specific alterations at different stages of Alzheimer's disease (AD) pathophysiologic continuum constituting what has been established as "AD signature". To what ...
  • Prepandemic alzheimer disease biomarkers and anxious-depressive symptoms during the COVID-19 confinement in cognitively unimpaired adults
    Akinci, Muge; Peña-Gómez, Cleofé; Operto, Grégory; Fuentes-Julian, Sherezade; Deulofeu, Carme; Sánchez Benavides, Gonzalo; Milà Alomà, Marta; Grau-Rivera, Oriol; Gramunt Fombuena, Nina; Navarro i Cuartiellas, Arcadi, 1969-; Minguillón, Carolina; Fauria, Karine; Suridjan, Ivonne; Kollmorgen, Gwendlyn; Bayfield, Anna; Blennow, Kaj; Zetterberg, Henrik; Molinuevo, José Luis; Suárez-Calvet, Marc; Gispert López, Juan Domingo; Arenaza-Urquijo, Eider M.; ALFA Study (Lippincott Williams & Wilkins, 2022)
    Background and objectives: Increased anxious-depressive symptomatology is observed in the preclinical stage of Alzheimer disease (AD), which may accelerate disease progression. We investigated whether β-amyloid, cortical ...
  • Reactive astrogliosis is associated with higher cerebral glucose consumption in the early Alzheimer's continuum
    Salvadó, Gemma; Milà Alomà, Marta; Shekari, Mahnaz; Operto, Grégory; Falcón, Carles; Cacciaglia, Raffaele; Minguillón, Carolina; Zetterberg, Henrik; Blennow, Kaj; Suárez-Calvet, Marc; Gispert López, Juan Domingo; ALFA Study (SpringerOpen, 2022)
    Purpose: glial activation is one of the earliest mechanisms to be altered in Alzheimer's disease (AD). Glial fibrillary acidic protein (GFAP) relates to reactive astrogliosis and can be measured in both cerebrospinal fluid ...
  • Soundtrack of life: an fMRI study
    Falcon, Carles; Navarro-Plaza, Mari Carmen; Gramunt Fombuena, Nina; Arenaza Urquijo, Eider M.; Grau-Rivera, Oriol; Cacciaglia, Raffaele; González de Echávarri, José Maria; Sanchez-Benavides, Gonzalo; Operto, Grégory; Knezevic, Iva; Molinuevo, José Luis; Domingo Gispert, Juan (Elsevier, 2022)
    Most people have a soundtrack of life, a set of special musical pieces closely linked to certain biographical experiences. Autobiographical memories (AM) and music listening (ML) involve complex mental processes ruled by ...
  • The protective gene dose effect of the APOE ε2 allele on gray matter volume in cognitively unimpaired individuals
    Salvadó, Gemma; Operto, Grégory; Cumplido-Mayoral, Irene; Arenaza Urquijo, Eider M.; Cacciaglia, Raffaele; Falcón, Carles; Vilor Tejedor, Natàlia, 1988-; Minguillón, Carolina; Gispert López, Juan Domingo; ADNI (Wiley, 2022)
    Introduction: Harboring two copies of the apolipoprotein E (APOE) ε2 allele strongly protects against Alzheimer's disease (AD). However, the effect of this genotype on gray matter (GM) volume in cognitively unimpaired ...