Cited by 131Intracerebral and Subarachnoid Hemorrhage ResearchAlzheimer's disease research and treatmentsNeurological Disease Mechanisms and Treatments

Contribution of reactive oxygen species to cerebral amyloid angiopathy, vasomotor dysfunction, and microhemorrhage in aged Tg2576 mice

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Han, Byung Hee, Zhou, Meng-liang, Johnson, Andrew W., Singh, Itender, Liao, Fan, Vellimana, Ananth K., Nelson, James W., Milner, Eric +6 more·2015·Proceedings of the National Academy of Sciences

Abstract

Cerebral amyloid angiopathy (CAA) is characterized by deposition of amyloid β peptide (Aβ) within walls of cerebral arteries and is an important cause of intracerebral hemorrhage, ischemic stroke, and cognitive dysfunction in elderly patients with and without Alzheimer's Disease (AD). NADPH oxidase-derived oxidative stress plays a key role in soluble Aβ-induced vessel dysfunction, but the mechanisms by which insoluble Aβ in the form of CAA causes cerebrovascular (CV) dysfunction are not clear. Here, we demonstrate evidence that reactive oxygen species (ROS) and, in particular, NADPH oxidase-derived ROS are a key mediator of CAA-induced CV deficits. First, the NADPH oxidase inhibitor, apocynin, and the nonspecific ROS scavenger, tempol, are shown to reduce oxidative stress and improve CV reactivity in aged Tg2576 mice. Second, the observed improvement in CV function is attributed both to a reduction in CAA formation and a decrease in CAA-induced vasomotor impairment. Third, anti-ROS therapy attenuates CAA-related microhemorrhage. A potential mechanism by which ROS contribute to CAA pathogenesis is also identified because apocynin substantially reduces expression levels of ApoE-a factor known to promote CAA formation. In total, these data indicate that ROS are a key contributor to CAA formation, CAA-induced vessel dysfunction, and CAA-related microhemorrhage. Thus, ROS and, in particular, NADPH oxidase-derived ROS are a promising therapeutic target for patients with CAA and AD.

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  • Inhibiting NOX with apocynin or genetic deletion of gp91phox in Tg2576 mice overexpressing mutant amyloid precursor protein attenuates cerebral amyloid angiopathy.

    “Inhibiting NOX with the naturally occurring compound, apocynin, or genetic deletion of gp91phox in mice (Tg2576) overexpressing mutant amyloid precursor protein (APP), attenuates cerebral amyloid angiopathy (CAA) [115,116].”

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  1. Holtzman DM, et al. (2000) Apolipoprotein E facilitates neuritic and cerebrovascular plaque formation in an Alzheimer's disease model. Ann Neurol 47(6):739-747.

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Authors
Han, B. H., Zhou, M.-L., Johnson, A. W., Singh, I., Liao, F., Vellimana, A. K., Nelson, J. W., Milner, E., Cirrito, J. R., Basak, J., Yoo, M., Dietrich, H. H., Holtzman, D. M., & Zipfel, G. J.
Affiliations
  • Washington University in St. Louis (US)
  • Departments of aNeurological Surgery,
  • Neurology, and
Venue
Proceedings of the National Academy of Sciences
Published
2015-02-09
Volume
112
Issue
8
Pages
E881-90
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2123684403
Cited by
131
References
72
Citations by year
2026: 4 · 2025: 4 · 2024: 6 · 2023: 10 · 2022: 10 · 2021: 17 · 2020: 17 · 2019: 12 · 2018: 9 · 2017: 16 · 2016: 18 · 2015: 8
FWCI
11.99
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • HHS | NIH | National Institute of Neurological Disorders and Stroke (NS071011-01A1)
  • HHS | National Institutes of Health (AG13956)
Topics
  • Health Sciences › Medicine › Neurology › Intracerebral and Subarachnoid Hemorrhage Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
cerebral amyloid angiopathy, reactive oxygen species, NADPH oxidase, oxidative stress, vasomotor dysfunction, cerebral microhemorrhages, amyloid-beta, apocynin, tempol, apolipoprotein E, Tg2576 mice, aging, Alzheimer's disease, cerebrovascular dysfunction
MeSH terms
Acetophenones, Aging, Animals, Apolipoproteins E, Astrocytes, Brain, Cerebral Arteries, Cerebral Hemorrhage, Cyclic N-Oxides, Cricetinae, Humans, Mice, Inbred C57BL, Mice, Transgenic, Muscle, Smooth, Vascular, Spin Labels, Vasomotor System, Cerebral Amyloid Angiopathy, Reactive Oxygen Species, Microglia, Oxidative Stress, Myocytes, Smooth Muscle

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