Cited by 54Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchCholinesterase and Neurodegenerative Diseases

γ-Secretase and its modulators: Twenty years and beyond

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Xia, Weiming·2019·Neuroscience Letters

Abstract

Twenty years ago, Wolfe, Xia, and Selkoe identified two aspartate residues in Alzheimer's presenilin protein that constitute the active site of the γ-secretase complex. Mutations in the genes encoding amyloid precursor protein (APP) or presenilin (PS) cause early onset familial Alzheimer's disease (AD), and sequential cleavages of the APP by β-secretase and γ-secretase/presenilin generate amyloid β protein (Aβ), the major component of pathological hallmark, neuritic plaques, in brains of AD patients. Therapeutic strategies centered on targeting γ-secretase/presenilin to reduce amyloid were implemented and led to several high profile clinical trials. This review article focuses on the studies of γ-secretase and its inhibitors/modulators since the discovery of presenilin as the γ-secretase. While a lack of complete understanding of presenilin biology renders failure of clinical trials, the lessons learned from some γ-secretase modulators, while premature for human testing, provide new directions to develop potential therapeutics. Imbalanced Aβ homeostasis is an upstream event of neurodegenerative processes. Exploration of γ-secretase modulators for their roles in these processes is highly significant, e.g., decreasing neuroinflammation and levels of phosphorylated tau, the component of the other AD pathological hallmark, neurofibrillary tangles. Agents with excellent human pharmacology hold great promise in suppressing neurodegeneration in pre-symptomatic or early stage AD patients.

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Crossref · 10.1016/j.neulet.2019.02.011

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  • Gamma-secretase modulators alter APP processing to lower Aβ42 and raise Aβ40 without affecting processing of other substrates.

    “An alternative means of inhibiting amyloidogenic processing of Aβ by γ-secretase is to use γ-secretase modulators (GSM) that alter processing of APP (lower Aβ42 and higher Aβ40 levels) without influencing processing of other substrates (Xia, 2019).”

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Research works printed but not linked: 8

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Authors
Xia, W.
Affiliations
Boston University (US)
Corresponding author
Xia, Weiming
Venue
Neuroscience Letters
Publisher
Elsevier BV
Published
2019-05
Volume
701
Pages
162-169
ISSN
0304-3940 (ISSN-L)
OpenAlex
W2913752334
Cited by
54
References
135
Citations by year
2026: 1 · 2025: 5 · 2024: 3 · 2023: 6 · 2022: 9 · 2021: 11 · 2020: 8 · 2019: 11
FWCI
1.15
Type
journal article
Language
en
Open access
Locations
  • Neuroscience Letters (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
U.S. Department of Veterans Affairs (I01 BX003527, I21BX003807)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Pharmacology › Cholinesterase and Neurodegenerative Diseases
Keywords
gamma-secretase, presenilin, gamma-secretase inhibitors, γ-secretase modulators, Alzheimer's disease, amyloid-beta, amyloid precursor protein, familial Alzheimer's disease, neuroinflammation, tau phosphorylation, neurofibrillary tangles, neurodegeneration
MeSH terms
Alzheimer Disease, Animals, Humans, Protease Inhibitors, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, tau Proteins, Amyloid Precursor Protein Secretases

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