Article ; Online: Malignant Brain Aging: The Formidable Link Between Dysregulated Signaling Through Mechanistic Target of Rapamycin Pathways and Alzheimer's Disease (Type 3 Diabetes).
Journal of Alzheimer's disease : JAD
2023 Volume 95, Issue 4, Page(s) 1301–1337
Abstract: Malignant brain aging corresponds to accelerated age-related declines in brain functions eventually derailing the self-sustaining forces that govern independent vitality. Malignant brain aging establishes the path toward dementing neurodegeneration, ... ...
Abstract | Malignant brain aging corresponds to accelerated age-related declines in brain functions eventually derailing the self-sustaining forces that govern independent vitality. Malignant brain aging establishes the path toward dementing neurodegeneration, including Alzheimer's disease (AD). The full spectrum of AD includes progressive dysfunction of neurons, oligodendrocytes, astrocytes, microglia, and the microvascular systems, and is mechanistically driven by insulin and insulin-like growth factor (IGF) deficiencies and resistances with accompanying deficits in energy balance, increased cellular stress, inflammation, and impaired perfusion, mimicking the core features of diabetes mellitus. The underlying pathophysiological derangements result in mitochondrial dysfunction, abnormal protein aggregation, increased oxidative and endoplasmic reticulum stress, aberrant autophagy, and abnormal post-translational modification of proteins, all of which are signature features of both AD and dysregulated insulin/IGF-1-mechanistic target of rapamycin (mTOR) signaling. This article connects the dots from benign to malignant aging to neurodegeneration by reviewing the salient pathologies associated with initially adaptive and later dysfunctional mTOR signaling in the brain. Effective therapeutic and preventive measures must be two-pronged and designed to 1) address complex and shifting impairments in mTOR signaling through the re-purpose of effective anti-diabetes therapeutics that target the brain, and 2) minimize the impact of extrinsic mediators of benign to malignant aging transitions, e.g., inflammatory states, obesity, systemic insulin resistance diseases, and repeated bouts of general anesthesia, by minimizing exposures or implementing neuroprotective measures. |
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MeSH term(s) | Humans ; Alzheimer Disease/pathology ; Sirolimus ; Brain/pathology ; TOR Serine-Threonine Kinases/metabolism ; Insulin/metabolism ; Diabetes Mellitus/metabolism |
Chemical Substances | Sirolimus (W36ZG6FT64) ; TOR Serine-Threonine Kinases (EC 2.7.11.1) ; Insulin |
Language | English |
Publishing date | 2023-09-15 |
Publishing country | Netherlands |
Document type | Journal Article ; Review ; Research Support, N.I.H., Extramural |
ZDB-ID | 1440127-7 |
ISSN | 1875-8908 ; 1387-2877 |
ISSN (online) | 1875-8908 |
ISSN | 1387-2877 |
DOI | 10.3233/JAD-230555 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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