A key role for MAM in mediating mitochondrial dysfunction in Alzheimer disease
Open accessAbstract
In the last few years, increased emphasis has been devoted to understanding the contribution of mitochondria-associated endoplasmic reticulum (ER) membranes (MAM) to human pathology in general, and neurodegenerative diseases in particular. A major reason for this is the central role that this subdomain of the ER plays in metabolic regulation and in mitochondrial biology. As such, aberrant MAM function may help explain the seemingly unrelated metabolic abnormalities often seen in neurodegeneration. In the specific case of Alzheimer disease (AD), besides perturbations in calcium and lipid homeostasis, there are numerous documented alterations in mitochondrial behavior and function, including reduced respiratory chain activity and oxidative phosphorylation, increased free radical production, and altered organellar morphology, dynamics, and positioning (especially perinuclear mitochondria). However, whether these alterations are primary events causative of the disease, or are secondary downstream events that are the result of some other, more fundamental problem, is still unclear. In support of the former possibility, we recently reported that C99, the C-terminal processing product of the amyloid precursor protein (APP) derived from its cleavage by β-secretase, is present in MAM, that its level is increased in AD, and that this increase reduces mitochondrial respiration, likely via a C99-induced alteration in cellular sphingolipid homeostasis. Thus, the metabolic disturbances seen in AD likely arise from increased ER-mitochondrial communication that is driven by an increase in the levels of C99 at the MAM.
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Alterations in the integrity of mitochondria-ER-associated membranes have been linked to processes underlying dementia.
“Alterations in the integrity of MAM have been linked to processes underlying dementia [47–49].”
From Neuronal Apolipoprotein E4 Expression Results in Proteome-Wide Alterations and Compromises Bioenergetic Capacity by Disrupting Mitochondrial Function (2019) · cites this paper as [48]
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- Authors
- Area-Gomez, E., de Groof, A., Bonilla, E., Montesinos, J., Tanji, K., Boldogh, I., Pon, L., & Schon, E. A.
- Affiliations
- Columbia University (US)
- Columbia University Irving Medical Center (US)
- Corresponding author
- Schon, Eric A.
- Venue
- Cell Death & Disease
- Published
- 2018-02-28
- Volume
- 9
- Issue
- 3
- Pages
- 335-335
- ISSN
- 2041-4889 (ISSN-L)
- PMC
- PMC5832428
- OpenAlex
- W2789816844
- Cited by
- 235
- References
- 16
- Citations by year
- 2026: 20 · 2025: 29 · 2024: 25 · 2023: 26 · 2022: 23 · 2021: 33 · 2020: 33 · 2019: 31 · 2018: 15
- FWCI
- 2.80
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Cell Death and Disease (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Funders
- U.S. Department of Defense (W911F-15-1-0169)
- J. Willard and Alice S. Marriott Foundation
- National Institutes of Health (5r01ag056387-02)
- National Institute on Aging (K01AG045335, R01-AG056387)
- National Institute of General Medical Sciences (R01GM045735, R35GM122589)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
- Keywords
- mitochondria-associated endoplasmic reticulum membranes, Alzheimer's disease, mitochondrial dysfunction, C99, amyloid precursor protein, beta-secretase, sphingolipid homeostasis, mitochondrial respiration, oxidative phosphorylation, ER-mitochondria communication, neurodegeneration, calcium homeostasis, lipid homeostasis
- MeSH terms
- Alzheimer Disease, Animals, Endoplasmic Reticulum, Humans, Mitochondria, Amyloid beta-Protein Precursor, Mitochondrial Membranes, Amyloid Precursor Protein Secretases
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