Neurofilaments are the major neuronal target of hydroxynonenal-mediated protein cross-links
Open accessAbstract
Lipid peroxidation generates reactive aldehydes, most notably hydroxynonenal (HNE), which covalently binds amino acid residue side chains leading to protein inactivation and insolubility. Specific adducts of lipid peroxidation have been demonstrated to be intimately associated with pathological lesions of Alzheimer's disease (AD), suggesting that oxidative stress is a major component in the disease. Here, we examined the HNE-cross-linking modifications by using an antibody specific for a lysine-lysine cross-link. Since in a prior study we noted no immunolabeling of neuritic plaques or neurofibrillary tangles but instead found strong labeling of axons, we focused this study on axons. Axonal labeling was examined in mouse sciatic nerve, and immunoblotting showed the cross-link was restricted to neurofilament heavy and medium subunits, which while altering migration, did not indicate larger NF aggregates, indicative of intermolecular cross-links. Examination of mice at various ages showed the extent of modification remaining relatively constant through the life span. These findings demonstrate lipid-cross-linking peroxidation primarily involves lysine-rich neurofilaments and is restricted to intramolecular cross-links.
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Increased levels of 4-hydroxy-2-trans-nonenal are observed in Alzheimer's disease and mild cognitive impairment brains.
“Increased levels of HNE are observed in AD and MCI brains [24,38].”
From Role of Oxidative Damage in Alzheimer’s Disease and Neurodegeneration: From Pathogenic Mechanisms to Biomarker Discovery (2021) · cites this paper as [38]
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- Authors
- Perry, E. A., Castellani, R. J., Moreira, P. I., Nunomura, A., Lui, Q., Harris, P. L. R., Sayre, L. M., Szweda, P. A., Szweda, L. I., Zhu, X., Smith, M. A., & Perry, G.
- Affiliations
- The University of Texas at San Antonio (US)
- University of Maryland, Baltimore (US)
- Centro de Neurociências e Biologia Celular (PT)
- University of Yamanashi (JP)
- Case Western Reserve University (US)
- Oklahoma Medical Research Foundation (US)
- Corresponding author
- Perry, G.
- ORCID
- Venue
- Free Radical Research
- Publisher
- Informa UK Limited
- Published
- 2013-05-10
- Volume
- 47
- Issue
- 6-7
- Pages
- 507-510
- ISSN
- 1029-2470 (ISSN-L)
- 1071-5762
- PMC
- PMC4097390
- OpenAlex
- W2023611061
- Cited by
- 16
- References
- 15
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 1 · 2022: 1 · 2021: 2 · 2019: 2 · 2018: 2 · 2016: 2 · 2015: 3 · 2013: 1
- FWCI
- 1.49
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Free Radical Research (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health
- National Institute on Minority Health and Health Disparities (G12MD007591)
- Topics
- Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Keywords
- 4-hydroxynonenal, neurofilaments, lipid peroxidation, protein cross-linking, oxidative stress, Alzheimer's disease, axons, intramolecular cross-links, lysine-rich proteins, aging
- MeSH terms
- Aldehydes, Animals, Antibodies, Fluorescence, Lysine, Mice, Inbred Strains, Sciatic Nerve, Neurofilament Proteins, Mice
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