Oxidative brain damage in Mecp2-mutant murine models of Rett syndrome
Open accessAbstract
Rett syndrome (RTT) is a rare neurodevelopmental disorder affecting almost exclusively females, caused in the overwhelming majority of the cases by loss-of-function mutations in the gene encoding methyl-CpG binding protein 2 (MECP2). High circulating levels of oxidative stress (OS) markers in patients suggest the involvement of OS in the RTT pathogenesis. To investigate the occurrence of oxidative brain damage in Mecp2 mutant mouse models, several OS markers were evaluated in whole brains of Mecp2-null (pre-symptomatic, symptomatic, and rescued) and Mecp2-308 mutated (pre-symptomatic and symptomatic) mice, and compared to those of wild type littermates. Selected OS markers included non-protein-bound iron, isoprostanes (F2-isoprostanes, F4-neuroprostanes, F2-dihomo-isoprostanes) and 4-hydroxy-2-nonenal protein adducts. Our findings indicate that oxidative brain damage 1) occurs in both Mecp2-null (both -/y and stop/y) and Mecp2-308 (both 308/y males and 308/+ females) mouse models of RTT; 2) precedes the onset of symptoms in both Mecp2-null and Mecp2-308 models; and 3) is rescued by Mecp2 brain specific gene reactivation. Our data provide direct evidence of the link between Mecp2 deficiency, oxidative stress and RTT pathology, as demonstrated by the rescue of the brain oxidative homeostasis following brain-specifically Mecp2-reactivated mice. The present study indicates that oxidative brain damage is a previously unrecognized hallmark feature of murine RTT, and suggests that Mecp2 is involved in the protection of the brain from oxidative stress.
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RTT animal models have oxidative changes in the brain.
“RTT patients have increased oxidative burden and abnormal mitochondrial structure, while RTT animal models have defects in the mitochondrial respiratory chain [23,26,200–202] and oxidative changes in the brain [203].”
From Rett syndrome: a neurological disorder with metabolic components (2018) · cites this paper as [203]
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- Authors
- De Felice, C., Della Ragione, F., Signorini, C., Leoncini, S., Pecorelli, A., Ciccoli, L., Scalabrì, F., Marracino, F., Madonna, M., Belmonte, G., Ricceri, L., De Filippis, B., Laviola, G., Valacchi, G., Durand, T., Galano, J.-M., Oger, C., Guy, A., Bultel-Poncé, V., Guy, J., Filosa, S., Hayek, J., & D'Esposito, M.
- Affiliations
- University of Siena (IT)
- Istituto Neurologico Mediterraneo (IT)
- Istituto Superiore di Sanità (IT)
- University of Ferrara (IT)
- École Nationale Supérieure de Chimie de Montpellier (FR)
- Wellcome Centre for Cell Biology (GB)
- ORCID
- Venue
- Neurobiology of Disease
- Publisher
- Elsevier BV
- Published
- 2014-08
- Volume
- 68
- Pages
- 66-77
- ISSN
- 0969-9961 (ISSN-L)
- PMC
- PMC4076513
- OpenAlex
- W2012807815
- Cited by
- 126
- References
- 79
- Citations by year
- 2026: 1 · 2025: 7 · 2024: 9 · 2023: 9 · 2022: 8 · 2021: 11 · 2020: 11 · 2019: 13 · 2018: 11 · 2017: 17 · 2016: 9 · 2015: 16 · 2014: 4
- FWCI
- 10.07
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Neurobiology of Disease (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- HAL (submittedVersion, cc-by-nc-nd)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Institutional Research Information System University of Ferrara (University of Ferrara) (submittedVersion)
- Use Siena air (University of Siena) (submittedVersion)
- Funders
- Bando Salute (TR142, Italy)
- AIR
- UE Initial Training Network (238242)
- MIUR-CNR
- IRE-IFO
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Genetic Neurodegenerative Diseases
- Keywords
- Rett syndrome, MeCP2, oxidative stress, brain oxidative damage, Mecp2-null mice, isoprostanes, neuroprostanes, non-protein-bound iron, neurodevelopmental disorders
- MeSH terms
- Aldehydes, Analysis of Variance, Animals, Brain Injuries, Disease Models, Animal, Docosahexaenoic Acids, Female, Male, Gas Chromatography-Mass Spectrometry, Mice, Inbred C57BL, Mice, Transgenic, Mutation, Rett Syndrome, Arachidonic Acid, Oxidative Stress, Isoprostanes, Mice, Methyl-CpG-Binding Protein 2, Neuroprostanes, Nestin
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