Neuroprotective Effects of PARP Inhibitors in Drosophila Models of Alzheimer’s Disease
Open accessAbstract
Alzheimer’s disease (AD) is an irreversible age-related neurodegenerative disorder clinically characterized by severe memory impairment, language deficits and cognitive decline. The major neuropathological hallmarks of AD include extracellular deposits of the β-amyloid (Aβ) peptides and cytoplasmic neurofibrillary tangles (NFTs) of hyperphosphorylated tau protein. The accumulation of plaques and tangles in the brain triggers a cascade of molecular events that culminate in neuronal damage and cell death. Despite extensive research, our understanding of the molecular basis of AD pathogenesis remains incomplete and a cure for this devastating disease is still not available. A growing body of evidence in different experimental models suggests that poly(ADP-ribose) polymerase-1 (PARP-1) overactivation might be a crucial component of the molecular network of interactions responsible for AD pathogenesis. In this work, we combined genetic, molecular and biochemical approaches to investigate the effects of two different PARP-1 inhibitors (olaparib and MC2050) in Drosophila models of Alzheimer’s disease by exploring their neuroprotective and therapeutic potential in vivo. We found that both pharmacological inhibition and genetic inactivation of PARP-1 significantly extend lifespan and improve the climbing ability of transgenic AD flies. Consistently, PARP-1 inhibitors lead to a significant decrease of Aβ42 aggregates and partially rescue the epigenetic alterations associated with AD in the brain. Interestingly, olaparib and MC2050 also suppress the AD-associated aberrant activation of transposable elements in neuronal tissues of AD flies.
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While these studies stand in slight contrast with an Aβ-based Drosophila model in which several retrotransposon transcripts were found to be elevated, it is clear that pathogenic forms of tau can drive the transcriptional elevation of retrotransposons independently of Aβ.
“While these studies stand in slight contrast with an Aβ-based Drosophila model in which several retrotransposon transcripts were found to be elevated (Maggiore et al. 2022), it is clear that pathogenic forms of tau can drive the transcriptional elevation of retrotransposons independently of Aβ.”
From The Role of Retrotransposons and Endogenous Retroviruses in Age-Dependent Neurodegenerative Disorders (2024) · cites this paper as Maggiore et al. 2022
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“Therefore, Aβ42 is pred cted to be the most potentially efficient target of drug therapies [80].”
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BackgroundThe Role of PARP-1 and PARP-2 Enzymes in Metabolic Regulation and Disease
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Cited by
Sorted by citations
Frost, B., & Dubnau, J. (2024) · Annual Review of Neuroscience · doi:10.1146/annurev-neuro-082823-020615 · Cited by 45 · see citing works
- Authors
- Maggiore, A., Casale, A. M., Toscanelli, W., Cappucci, U., Rotili, D., Grieco, M., Gagné, J.-P., Poirier, G. G., d’Erme, M., & Piacentini, L.
- Affiliations
- Sapienza University of Rome (IT)
- Université Laval (CA)
- Corresponding author
- Piacentini, Lucia
- ORCID
- Venue
- Cells
- Publisher
- MDPI AG
- Published
- 2022-04-09
- Volume
- 11
- Issue
- 8
- Pages
- 1284
- ISSN
- 2073-4409 (ISSN-L)
- PMC
- PMC9027574
- OpenAlex
- W4223503917
- Cited by
- 40
- References
- 13
- Citations by year
- 2026: 10 · 2025: 14 · 2024: 7 · 2023: 6 · 2022: 2 · 2021: 1
- FWCI
- 4.49
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Cells (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Iris (Roma Tre University) (submittedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- IRIS Research product catalog (Sapienza University of Rome) (submittedVersion, cc-by)
- Funders
- Sapienza Università di Roma
- Topics
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
- Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
- Keywords
- Alzheimer's disease, PARP-1 inhibitors, olaparib, neuroprotection, Drosophila model, amyloid-beta aggregation, amyloid-beta 42, transposable elements, epigenetic modifications, lifespan extension, climbing behavior, neurofibrillary tangles, tau hyperphosphorylation, neuronal injury
- MeSH terms
- Poly(ADP-ribose) Polymerase Inhibitors, Alzheimer Disease, Animals, Drosophila, Amyloid beta-Peptides, Neuroprotective Agents
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