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Guilherme Bauer-Negrini

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Open access Sep 2026

Age at Diagnosis and Clinical and Genetic Profiles Among Adults With Attention-Deficit/Hyperactivity Disorder

Key Points Question Do demographic, clinical, and genetic profiles of adults diagnosed with attention-deficit/hyperactivity disorder (ADHD) in adulthood differ from adults diagnosed with ADHD in childhood or adolescence, and how do profiles of both groups compare with matched controls without ADHD? Findings In this cro...

D. Leffa, Guilherme Bauer-Negrini, B. Bellaver et al. · 0 citations
Open access Sep 2026

A Harmonized Visual Reading Framework for Tau PET Staging in Alzheimer Disease

Key Points Question Can a harmonized visual reading framework enable reliable, tracer-agnostic staging of tau positron emission tomography (PET) pathology for clinical use? Findings In this multicenter cross-sectional study of 681 participants scanned with multiple tau PET radiotracers, a 5-class harmonized visual read...

E. Ruppert, M. Vermeiren, Marina Scop Medeiros et al. · 0 citations
Open access Sep 2026

Astrocyte reactivity identifies p-tau217-positive individuals at elevated risk of cognitive decline across the Alzheimer’s disease continuum

It is shown that elevated plasma GFAP significantly modulates the association between p-tau217 and both cross-sectional cognitive severity and longitudinal clinical decline, and support that astrocyte reactivity is associated with greater cognitive impairment and faster clinical decline among individuals with elevated...

B. Bellaver, G. Povala, P. C. L. Ferreira et al. · 0 citations
Aug 2026

Association Between Plasma GFAP and Medial Temporal Atrophy and Cognition in Amyloid-Negative Cerebrovascular Disease.

In Aβ-negative cognitively impaired individuals with high cerebrovascular burden, elevated plasma GFAP is associated with medial temporal atrophy and cognitive decline, suggesting GFAP may capture astrocyte-reactivity relevant to vascular cognitive impairment beyond amyloid pathology.

M. S. Oliveira-Junior, M. Rodrigues, Livia Amaral et al. · 0 citations

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