Cited by 53Alzheimer's disease research and treatmentsMitochondrial Function and PathologyDementia and Cognitive Impairment Research

Lymphocytic mitochondrial aconitase activity is reduced in Alzheimer’s disease and mild cognitive impairment

Mangialasche, Francesca, Baglioni, Mauro, Cecchetti, Roberta, Kivipelto, Miia, Ruggiero, Carmelinda, Piobbico, Danilo, Kussmaul, Lothar, Monastero, Roberto +2 more·2015·Journal of Alzheimer s Disease

Abstract

BACKGROUND: Specific mechanisms behind the role of oxidative/nitrosative stress and mitochondrial dysfunction in Alzheimer's disease (AD) pathogenesis remain elusive. Mitochondrial aconitase (ACO2) is a Krebs cycle enzyme sensitive to free radical-mediated damage. OBJECTIVE: We assessed activity and expression of ACO2 extracted from blood lymphocytes of subjects with AD, mild cognitive impairment (MCI), older adults with normal cognition (OCN, age ≥65 years), and younger adults with normal cognition (YCN, age <65 years). Plasma levels and activities of antioxidants were also measured. METHODS: Blood samples were collected from 28 subjects with AD, 22 with MCI, 21 OCN, and 19 YCN. ACO2 activity was evaluated in a subsample before and after in vitro exposure to free radicals. RESULTS: ACO2 activity was significantly lower in AD and MCI cases than controls: ACO2 median activity was 0.64 ± 0.21 U/mg protein for AD, 0.93 ± 0.28 U/mg protein for MCI, 1.17 ± 0.78 U/mg protein for OCN subjects, and 1.23 ± 0.43 U/mg protein for YCN individuals. In subjects with AD and MCI, ACO2 expression was lower than OCN subjects, and ACO2 activity correlated with vitamin E plasma levels (rho: 0.64, p < 0.001) and Mini-Mental State Examination total score (rho: 0.82, p < 0.001). Furthermore, free radicals exposure reduced ACO2 activity more in individuals with AD than in OCN subjects. CONCLUSION: Our results suggest that ACO2 activity is reduced in peripheral lymphocytes of subjects with AD and MCI and correlates with antioxidant protection. Further studies are warranted to verify the role of ACO2 in AD pathogenesis and its importance as a marker of AD progression.

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Crossref · 10.3233/jad-142052

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53 of 53 references verified0 citation errors · 0 not checkable

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  • The activity of aconitase is significantly decreased in mitochondria from both MCI and AD lymphocytes.

    “The activity of aconitase is significantly decreased in mitochondria from both MCI and AD lymphocytes [112].”

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Authors
Mangialasche, F., Baglioni, M., Cecchetti, R., Kivipelto, M., Ruggiero, C., Piobbico, D., Kussmaul, L., Monastero, R., Brancorsini, S., & Mecocci, P.
Affiliations
  • Stockholm University (SE)
  • University of Perugia (IT)
  • Boehringer Ingelheim (Germany) (DE)
  • University of Palermo (IT)
Corresponding author
  • Brancorsini, Stefano
  • Mecocci, Patrizia
Venue
Journal of Alzheimer s Disease
Published
2015-01-22
Volume
44
Issue
2
Pages
649-660
ISSN
  • 1387-2877 (ISSN-L)
  • 1875-8908
OpenAlex
W1751439894
Cited by
53
References
53
Citations by year
2026: 5 · 2025: 3 · 2024: 6 · 2023: 6 · 2022: 4 · 2021: 6 · 2020: 6 · 2019: 5 · 2018: 4 · 2017: 3 · 2016: 3 · 2015: 2
FWCI
2.95
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Alzheimer s Disease (publishedVersion)
  • PubMed (publishedVersion)
  • Nova Science Publishers (Nova Science Publishers, Inc.) (submittedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
mitochondrial aconitase, Alzheimer's disease
MeSH terms
Aconitate Hydratase, Aged, Alzheimer Disease, Female, Free Radicals, Humans, Lymphocytes, Male, Mental Status Schedule, Mitochondria, RNA, Messenger, Vitamin E, Blotting, Western, Biomarkers, Polymerase Chain Reaction, Disease Progression, Cognitive Dysfunction

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