Cited by 162Intracerebral and Subarachnoid Hemorrhage ResearchAlzheimer's disease research and treatmentsCerebrovascular and genetic disorders

The Apolipoprotein E ε2 Allele and the Pathological Features in Cerebral Amyloid Angiopathy-related Hemorrhage

McCarron, Mark O., Nicoll, James A. R., Stewart, Janice, Ironside, James W., Mann, David M. A., Love, Seth, Graham, David I., Dewar, Deborah·1999·Journal of Neuropathology and Experimental Neurology

Abstract

Cerebral amyloid angiopathy (CAA) is associated with apolipoprotein E (APOE gene, apoE protein) polymorphism: current evidence suggests that the epsilon4 allele is a risk factor for the development of CAA and the epsilon2 allele predisposes to hemorrhage. We sought to determine the relationship between the APOE epsilon2 allele and both the immunoreactivity profiles and vascular complications of CAA. We performed immunohistochemistry for amyloid beta-protein (A beta), apoE, cystatin C, and activated microglia, and examined the morphology of cortical and leptomeningeal vessels in 37 CAA-related hemorrhage (CAAH), 26 Alzheimer disease (AD) patients, and 20 controls. The extent of immunostaining of vessels for A beta, apoE, cystatin C, and perivascular activated microglia increased from controls through AD to a maximum in CAAH patients. Among cases with CAA (37 CAAH, 19 AD, and 6 controls, n = 62) vascular apoE (p < 5 x 10(-4)), cystatin C (p < 10(-4)), activated microglia (p < 10(-4)), vessels with a high ratio of wall thickness to lumen diameter (p < 0.003) as well as dilated/microaneurysmal vessels (p < 0.01) were present more frequently in patients with hemorrhage than without; however, these features were not associated with the APOE epsilon2 allele. Fibrinoid necrosis alone was associated with the APOE epsilon2 allele (p < 0.04) and we suggest that over-representation of APOE epsilon2 in CAAH may result from its association with fibrinoid necrosis.

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Crossref · 10.1097/00005072-199907000-00005

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  • Human studies have linked APOE2 to greater CAA severity in some cohorts, and to CAA-related vasculopathic changes and hemorrhagic complications.

    “However, human studies have linked APOE2 to greater CAA severity in some cohorts 52 , and to CAA-related vasculopathic changes and hemorrhagic complications 53,54 .”
  • Evidence independently supports link of both the APOE ε4 and ε2 allele with increased risk for microhemorrhages in humans.

    “Evidence independently supports link of both the APOE ε4 and ε2 allele with increased risk for microhemorrhages in humans [51, 52, 54–57].”
  • Several human autopsy studies have shown that the ε2 allele is an exacerbating factor of microhemorrhages among subjects with VAβ pathology and that this effect is linked to fibrinoid necrosis of vascular wall specifically associated with the ε2 allele.

    “Several human autopsy studies have shown that the ε2 allele is an exacerbating factor of microhemorrhages among subjects with VAβ pathology and that this effect is linked to fibrinoid necrosis of vascular wall specifically associated with the ε2 allele [55–57].”
  • APOEε2/ε4 individuals have a particularly high risk of intracerebral lobar haemorrhage in the presence of cerebral amyloid angiopathy, possibly because the APOEε2 allele has been associated with fibrinoid necrosis of the vessel wall.

    “Of note, APOEε2/ε4 individuals have a particularly high risk of intracerebral lobar haemorrhage in the presence of CAA50, possibly because the APOEε2 allele has been associated with fibrinoid necrosis of the vessel wall56,57.”

    From Multifaceted roles of APOE in Alzheimer disease (2024) · cites this paper as [57]

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Authors
McCarron, M. O., Nicoll, J. A. R., Stewart, J., Ironside, J. W., Mann, D. M. A., Love, S., Graham, D. I., & Dewar, D.
Affiliations
  • Southern General Hospital (GB)
  • Western General Hospital (GB)
  • University of Manchester (GB)
  • Frenchay Hospital (GB)
  • University of Glasgow (GB)
Venue
Journal of Neuropathology and Experimental Neurology
Published
1999-07
Volume
58
Issue
7
Pages
711-718
ISSN
0022-3069 (ISSN-L)
OpenAlex
W1985093052
Cited by
160
References
0
Citations by year
2026: 2 · 2025: 2 · 2024: 5 · 2023: 5 · 2022: 2 · 2021: 3 · 2020: 4 · 2019: 2 · 2018: 5 · 2017: 4 · 2016: 3 · 2015: 10 · 2014: 13 · 2013: 11 · 2012: 7
FWCI
5.28
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neuropathology & Experimental Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Wellcome Trust
Topics
  • Health Sciences › Medicine › Neurology › Intracerebral and Subarachnoid Hemorrhage Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Neurology › Cerebrovascular and genetic disorders
Keywords
cerebral amyloid angiopathy, APOE ε2 allele, intracerebral hemorrhage, amyloid-beta, cystatin C, activated microglia, fibrinoid necrosis, leptomeningeal vessels, cortical vessels, Alzheimer's disease, APOE polymorphism, microaneurysms
MeSH terms
Aged, Alleles, Alzheimer Disease, Apolipoproteins E, Intracranial Aneurysm, Cerebral Hemorrhage, Female, Humans, Immunohistochemistry, Male, Necrosis, Reference Values, Amyloid beta-Peptides, Cerebral Amyloid Angiopathy, Apolipoprotein E2

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