Cited by 78Alzheimer's disease research and treatmentsMitochondrial Function and PathologyDementia and Cognitive Impairment Research

Human mitochondrial transcriptional factor A breaks the mitochondria-mediated vicious cycle in Alzheimer’s disease

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Oka, Sugako, Leon, Julio, Sakumi, Kunihiko, Ide, Tomomi, Kang, Dongchon, LaFerla, Frank M., Nakabeppu, Yusaku·2016·Scientific Reports

Abstract

Abstract In the mitochondria-mediated vicious cycle of Alzheimer’s disease (AD), intracellular amyloid β (Aβ) induces mitochondrial dysfunction and reactive oxygen species, which further accelerate Aβ accumulation. This vicious cycle is thought to play a pivotal role in the development of AD, although the molecular mechanism remains unclear. Here, we examined the effects of human mitochondrial transcriptional factor A (hTFAM) on the pathology of a mouse model of AD (3xTg-AD), because TFAM is known to protect mitochondria from oxidative stress through maintenance of mitochondrial DNA (mtDNA). Expression of hTFAM significantly improved cognitive function, reducing accumulation of both 8-oxoguanine, an oxidized form of guanine, in mtDNA and intracellular Aβ in 3xTg-AD mice and increasing expression of transthyretin, known to inhibit Aβ aggregation. Next, we found that AD model neurons derived from human induced pluripotent stem cells carrying a mutant PSEN1 (P117L) gene, exhibited mitochondrial dysfunction, accumulation of 8-oxoguanine and single-strand breaks in mtDNA, and impaired neuritogenesis with a decreased expression of transthyretin, which is known to be downregulated by oxidative stress. Extracellular treatment with recombinant hTFAM effectively suppressed these deleterious outcomes. Moreover, the treatment increased expression of transthyretin, accompanied by reduction of intracellular Aβ. These results provide new insights into potential novel therapeutic targets.

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  1. MacKenna M., Dienel G., Sonnewald U., HS W. & A S. In Basic Neurochemistry (eds Brady S. T. & Siegel G. J.) Ch. 1, 200– 231 (Academic Press, 2012).

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Authors
Oka, S., Leon, J., Sakumi, K., Ide, T., Kang, D., LaFerla, F. M., & Nakabeppu, Y.
Affiliations
  • Kyushu University (JP)
  • University of California, Irvine (US)
Corresponding author
Nakabeppu, Yusaku
Venue
Scientific Reports
Published
2016-11-29
Volume
6
Issue
1
Pages
37889-37889
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2558650766
Cited by
78
References
57
Citations by year
2026: 4 · 2025: 11 · 2024: 6 · 2023: 8 · 2022: 7 · 2021: 13 · 2020: 8 · 2019: 12 · 2018: 6 · 2017: 3
FWCI
5.63
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion, cc-by)
Funders
  • Japan Agency for Medical Research and Development (H25-ninchisho-ippann-004)
  • Ministry of Health, Labour and Welfare (H20-ninchisho-ippan-004)
  • Fakultet Medicinskih Nauka, Univerziteta U Kragujevcu
  • Japan Society for the Promotion of Science (22221004, 15H04298, 15K15085, 25461281)
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
Alzheimer's disease, TFAM, amyloid-beta, mitochondrial dysfunction, oxidative stress, 8-oxoguanine, mitochondrial DNA damage, prealbumin, amyloid-beta aggregation, 3xTg-AD mice, iPSC-derived neurons, neurite outgrowth, cognitive function, therapeutic target
MeSH terms
Alzheimer Disease, Animals, Cells, Cultured, Cognition, Disease Models, Animal, DNA-Binding Proteins, DNA, Mitochondrial, Humans, Mice, Transgenic, Mitochondria, Prealbumin, Transcription Factors, Amyloid beta-Peptides, Reactive Oxygen Species, Oxidative Stress, Mitochondrial Proteins, Mice, Presenilin-1, Induced Pluripotent Stem Cells

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