Age-Dependent Decrease of Mitochondrial Complex II Activity in a Familial Mouse Model for Alzheimer’s Disease

T. Emmerzaal,R. Rodenburg,H. Tanila,V. Verweij,A. Kiliaan,T. Kozicz

Published 2018 in Journal of Alzheimer's Disease

ABSTRACT

Alzheimer’s disease (AD) is a severe neurodegenerative disorder for which the exact etiology is largely unknown. An increasingly recognized and investigated notion is the pathogenic role of mitochondrial dysfunction in AD. We assessed mitochondrial oxidative-phosphorylation (OXPHOS) enzyme activities in the APPswe/PS1ΔE9 mouse model from 4.5 to 14 months of age. We show an age-dependent decrease in mitochondrial complex-II activity starting at 9 months in APP/PS1 mice. Other enzymes of the OXPHOS do not show any alterations. Since amyloid-β (Aβ) plaques are already present from 4 months of age, mitochondrial dysfunction likely occurs downstream of Aβ pathology in this mouse model.

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