Quantitation of apoE Domains in Alzheimer Disease Brain Suggests a Role for apoE in Aß Aggregation
Quantitation of apoE Domains in Alzheimer Disease Brain Suggests a Role for apoE in Aß Aggregation
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阿尔茨海默病大脑中 apoE 结构域的定量表明 apoE 在 Aß 聚集中的作用
DOI:
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发表时间:
2001
影响因子:
3.2
通讯作者:
G. Rebeck
中科院分区:
文献类型:
--
作者:
H. Cho;B. Hyman;Steven M. Greenberg;G. Rebeck
Apolipoprotein E (apoE) and apoE-derived proteolytic fragments are present in amyloid deposits in Alzheimer disease (AD) and cerebral amyloid angiopathy (CAA). In this study, we examined which apoE fragments are most strongly associated with amyloid deposits and whether apoE receptor binding domains were present. We found that both apoE2- and apoE4-specific residues were present on plaques and blood vessels in AD and CAA. We quantified Aß plaque burden and apoE plaque burdens in 5 AD brains. ApoE N-terminal-specific and C-terminal-specific antibodies covered 50% and 74% of Aß plaque burden, respectively (p < 0.003). Double-labeling demonstrated that the plaque cores contained the entire apoE protein, but that outer regions contained only a C-terminal fragment, suggesting a cleavage in the random coil region of apoE. Presence of N- and C-terminal apoE cleavage fragments in brain extracts was confirmed by immunoblotting. The numbers of plaques identified by the apoE N-terminal-specific antibodies and the apoE C-terminal-specific antibody were equal, but were only approximately 60% of the total Aß plaque number (p < 0.0001). Analysis of the size distribution of Aß and apoE deposits demonstrated that most of the Aß-positive, apoE-negative deposits were the smallest deposits (less than 150 μm2). These data suggest that C-terminal residues of apoE bind to Aß and that apoE may help aid in the progression of small Aß deposits to larger deposits. Furthermore, the presence of the apoE receptor binding domain in the center of amyloid deposits could affect surrounding cells via chronic interactions with cell surface apoE receptors.
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DOI:
10.1073/pnas.90.5.1977
发表时间:
1993-03-01
影响因子:
11.1
作者:
STRITTMATTER, WJ;SAUNDERS, AM;ROSES, AD
通讯作者:
ROSES, AD
DOI:
10.1073/pnas.90.20.9649
发表时间:
1993-10-15
影响因子:
11.1
作者:
SCHMECHEL, DE;SAUNDERS, AM;ROSES, AD
通讯作者:
ROSES, AD
影响因子:
--
作者:
K. Weisgraber
通讯作者:
K. Weisgraber
DOI:
10.1016/0169-328x(91)90111-a
发表时间:
1991-09
期刊:
Brain research. Molecular brain research
影响因子:
--
作者:
J. Poirier;M. Hess;P. May;C. Finch
通讯作者:
J. Poirier;M. Hess;P. May;C. Finch
DOI:
10.1016/s0140-6736(95)90701-7
发表时间:
1995
期刊:
Lancet (London, England)
影响因子:
--
作者:
Wisniewski,T;Lalowski,M;Golabek,A;Vogel,T;Frangione,B
通讯作者:
Frangione,B