PT  - JOURNAL ARTICLE
AU  - Cabrera-Álvarez, Jesús
AU  - Stefanovski, Leon
AU  - Martin, Leon
AU  - Susi, Gianluca
AU  - Maestú, Fernando
AU  - Ritter, Petra
TI  - A Multiscale Closed-Loop Neurotoxicity Model of Alzheimer’s Disease Progression Explains Functional Connectivity Alterations
AID  - 10.1523/ENEURO.0345-23.2023
DP  - 2024 Apr 01
TA  - eneuro
PG  - ENEURO.0345-23.2023
VI  - 11
IP  - 4
4099  - http://www.eneuro.org/content/11/4/ENEURO.0345-23.2023.short
4100  - http://www.eneuro.org/content/11/4/ENEURO.0345-23.2023.full
SO  - eNeuro2024 Apr 01; 11
AB  - The accumulation of amyloid-β (Aβ) and hyperphosphorylated-tau (hp-tau) are two classical histopathological biomarkers in Alzheimer’s disease (AD). However, their detailed interactions with the electrophysiological changes at the meso- and macroscale are not yet fully understood. We developed a mechanistic multiscale model of AD progression, linking proteinopathy to its effects on neural activity and vice-versa. We integrated a heterodimer model of prion-like protein propagation and a brain network model of Jansen–Rit neural masses derived from human neuroimaging data whose parameters varied due to neurotoxicity. Results showed that changes in inhibition guided the electrophysiological alterations found in AD, and these changes were mainly attributed to Aβ effects. Additionally, we found a causal disconnection between cellular hyperactivity and interregional hypersynchrony contrary to previous beliefs. Finally, we demonstrated that early Aβ and hp-tau depositions’ location determine the spatiotemporal profile of the proteinopathy. The presented model combines the molecular effects of both Aβ and hp-tau together with a mechanistic protein propagation model and network effects within a closed-loop model. This holds the potential to enlighten the interplay between AD mechanisms on various scales, aiming to develop and test novel hypotheses on the contribution of different AD-related variables to the disease evolution.