Cited by 777Alzheimer's disease research and treatmentsAntioxidant Activity and Oxidative StressDementia and Cognitive Impairment Research

Increased Lipid Peroxidation Precedes Amyloid Plaque Formation in an Animal Model of Alzheimer Amyloidosis

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Praticò, Domenico, Uryu, Kunihiro, Leight, Susan, Trojanoswki, John Q., Lee, Virginia M.-Y.·2001·The Journal of Neuroscience

Abstract

Oxidative stress is a key feature in the Alzheimer's disease (AD) brain and manifests as lipid peroxidation (LPO). Isoprostanes (iPs) are specific and sensitive markers of in vivo LPO. To determine whether amyloid beta (Abeta) deposition in vivo is associated with increased LPO, we examined iP levels in a transgenic mouse model (Tg2576) of AD amyloidosis. Urine, plasma, and brain tissues were collected from Tg2576 and littermate wild-type (WT) animals at different time points starting at 4 months of age and continuing until 18 months of age. Levels of urinary 8,12-iso-iPF(2alpha)-VI were higher in Tg2576 than in WT animals as early as 8 months of age and remained this high for the rest of the study. A similar pattern was observed for plasma levels of 8,12-iso-iPF(2alpha)-VI. Homogenates from the cerebral cortex and hippocampus of Tg2576 mice had higher levels of 8,12-iso-iPF(2alpha)-VI than those from WT mice starting at 8 months of age. In contrast, a surge of Abeta 1-40 and 1-42 levels as well as Abeta deposits in Tg2576 mouse brains occurred later, at 12 months of age. A direct correlation was observed between brain 8,12-iso-iPF(2alpha)-VI and Abeta 1-40 and 1-42. Because LPO precedes amyloid plaque formation in Tg2576 mice, this suggests that brain oxidative damage contributes to AD pathogenesis before Abeta accumulation in the AD brain.

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Crossref · 10.1523/jneurosci.21-12-04183.2001

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  • Oxidative damage is an early event in the pathogenesis of Alzheimer's disease, occurring before the onset of clinical symptoms, and is also a factor contributing to disease progression.

    “Past and recent studies have demonstrated that oxidative damage is not only an early event in the pathogenesis of AD, occurring before the onset of clinical symptoms but also a factor contributing to the disease progression [17,18,19,20,21].”
  • Protein oxidation, nucleic acid oxidation, and lipid peroxidation are markers of oxidative stress described as early alterations in the Alzheimer's disease brain, supporting the oxidative stress hypothesis of AD pathogenesis.

    “All of these markers of OS have been described as an early alteration in the AD brain, and this concept has been used in the past to support the ‘oxidative stress hypothesis’ in the pathogenesis of AD [20,28,29,30].”
  • Pioneering studies conducted to validate early changes of products of oxidative damage found in specimens of Alzheimer's disease patients in the Tg2576 transgenic mouse model of AD amyloidosis date back more than 20 years.

    “The pioneering studies, conducted to validate the early changes of products of oxidative damage, found in specimens of AD patients, in a transgenic mouse model (Tg2576) of AD amyloidosis, dated back more than 20 years [20,124].”

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Authors
Praticò, D., Uryu, K., Leight, S., Trojanoswki, J. Q., & Lee, V. M.-Y.
Affiliations
University of Pennsylvania (US)
Venue
The Journal of Neuroscience
Published
2001-06-15
Volume
21
Issue
12
Pages
4183-4187
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1954454186
Cited by
777
References
24
Citations by year
2026: 4 · 2025: 15 · 2024: 17 · 2023: 29 · 2022: 19 · 2021: 32 · 2020: 23 · 2019: 27 · 2018: 16 · 2017: 24 · 2016: 24 · 2015: 28 · 2014: 32 · 2013: 37 · 2012: 48
FWCI
22.76
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • American Heart Association
  • National Institutes of Health (AG-11542)
  • National Institute on Aging (P01AG011542, AG 11542)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
lipid peroxidation, isoprostanes, amyloid-beta, amyloid plaques, Alzheimer's disease, Tg2576 mice, oxidative stress, Aβ40, amyloid-beta 42, brain oxidative damage, pathogenesis
MeSH terms
Aging, Alzheimer Disease, Amyloidosis, Animals, Brain, Cerebellum, Cerebral Cortex, Disease Models, Animal, Enzyme-Linked Immunosorbent Assay, Female, Hippocampus, Male, Mice, Transgenic, Peptide Fragments, Lipid Peroxidation, Dinoprost, Amyloid beta-Peptides, Mice, Plaque, Amyloid

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