J 2024

Swedish Alzheimer's disease variant perturbs activity of retrograde molecular motors and causes widespread derangement of axonal transport pathways

FEOLE, Monica, Victorio M Pozo DEVOTO, Neda DRAGIŠIĆ, Cayetana ARNAIZ, Julieta BIANCHELLI et. al.

Basic information

Original name

Swedish Alzheimer's disease variant perturbs activity of retrograde molecular motors and causes widespread derangement of axonal transport pathways

Authors

FEOLE, Monica, Victorio M Pozo DEVOTO, Neda DRAGIŠIĆ, Cayetana ARNAIZ, Julieta BIANCHELLI, Kateřina TEXLOVÁ, Kristina KOVAČOVICOVA, Jan S NOVOTNY, Daniel HAVAS, Tomas L FALZONE and Gorazd B STOKIN

Edition

Journal of Biological Chemistry, AMSTERDAM, ELSEVIER, 2024, 1083-351X

Other information

Language

English

Type of outcome

Article in a journal

Country of publisher

Netherlands

Confidentiality degree

is not subject to a state or trade secret

References:

Organization

Lékařská fakulta – Repository – Repository

UT WoS

001345540200001

EID Scopus

2-s2.0-85189556487

Keywords (in Czech)

Alzheimerova choroba; axonální transport; familiární patogenní varianty; amyloidní prekurzorový protein; dynaktin-1; časné endozomy; lysozomy

Keywords in English

Alzheimer’s disease; axonal transport; familial pathogenic variants; amyloid precursor protein; dynactin-1; early endosomes; lysosomes

Links

LX22NPO5107, research and development project.
Changed: 29/11/2024 00:50, RNDr. Daniel Jakubík

Abstract

V originále

Experimental studies in flies, mice, and humans suggest a significant role of impaired axonal transport in the pathogenesis of Alzheimer’s disease (AD). The mechanisms underlying these impairments in axonal transport, however, remain poorly understood. Here we report that the Swedish familial AD mutation causes a standstill of the Amyloid Precursor Protein (APP) in the axons at the expense of its reduced anterograde transport. The standstill reflects the perturbed directionality of the axonal transport of APP, which spends significantly more time traveling in the retrograde direction. This ineffective movement is accompanied by an enhanced association of dynactin-1 with APP, which suggests that reduced anterograde transport of APP is the result of enhanced activation of the retrograde molecular motor dynein by dynactin-1. The impact of the Swedish mutation on axonal transport is not limited to the APP vesicles since it also reverses the directionality of a subset of early endosomes, which become enlarged and aberrantly accumulate in distal locations. In addition, it also reduces the trafficking of lysosomes due to their less effective retrograde movement. Altogether, our experiments suggest a pivotal involvement of retrograde molecular motors and transport in the mechanisms underlying impaired axonal transport in AD and reveal significantly more widespread derangement of axonal transport pathways in the pathogenesis of AD.Experimental studies in flies, mice, and humans suggest a significant role of impaired axonal transport in the pathogenesis of Alzheimer’s disease (AD). The mechanisms underlying these impairments in axonal transport, however, remain poorly understood. Here we report that the Swedish familial AD mutation causes a standstill of the Amyloid Precursor Protein (APP) in the axons at the expense of its reduced anterograde transport. The standstill reflects the perturbed directionality of the axonal transport of APP, which spends significantly more time traveling in the retrograde direction. This ineffective movement is accompanied by an enhanced association of dynactin-1 with APP, which suggests that reduced anterograde transport of APP is the result of enhanced activation of the retrograde molecular motor dynein by dynactin-1. The impact of the Swedish mutation on axonal transport is not limited to the APP vesicles since it also reverses the directionality of a subset of early endosomes, which become enlarged and aberrantly accumulate in distal locations. In addition, it also reduces the trafficking of lysosomes due to their less effective retrograde movement. Altogether, our experiments suggest a pivotal involvement of retrograde molecular motors and transport in the mechanisms underlying impaired axonal transport in AD and reveal significantly more widespread derangement of axonal transport pathways in the pathogenesis of AD.

Files attached