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.

Základní údaje

Originální název

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

Autoři

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

Vydání

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

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Stát vydavatele

Nizozemské království

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Organizace

Lékařská fakulta – Masarykova univerzita – Repozitář

UT WoS

001345540200001

EID Scopus

2-s2.0-85189556487

Klíčová slova česky

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

Klíčová slova anglicky

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

Návaznosti

LX22NPO5107, projekt VaV.
Změněno: 29. 11. 2024 00:50, RNDr. Daniel Jakubík

Anotace

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.

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