Pyroglutamate-Modified Amyloid-β Protein Demonstrates Similar Properties in an Alzheimer's Disease Familial Mutant Knock-In Mouse and Alzheimer's Disease Brain
Pyroglutamate-Modified Amyloid-β Protein Demonstrates Similar Properties in an Alzheimer's Disease Familial Mutant Knock-In Mouse and Alzheimer's Disease Brain
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焦谷氨酸修饰的淀粉样β蛋白在阿尔茨海默病家族突变基因敲入小鼠和阿尔茨海默病大脑中表现出类似的特性
DOI:
10.1159/000353634
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发表时间:
2013
影响因子:
3
通讯作者:
M. Savage
中科院分区:
文献类型:
--
作者:
Guoxin Wu;Ron Miller;Brett Connolly;Jacob N. Marcus;J. Renger;M. Savage
Background: N-terminally truncated, pyroglutamate-modified amyloid-β (Aβ) peptides are major constituents of amyloid deposits in Alzheimer's disease (AD). Methods: Using a newly developed ELISA for Aβ modified at glutamate 3 with a pyroglutamate (pE3Aβ), brain pE3Aβ was characterized in human AD in an AD mouse model harboring double knock-in amyloid precursor protein (APP)-KM670/671NL and presenilin 1 (PS1)-P264L (APP/PS1-dKI) mutations, and in a second mouse model with transgenic overexpression of human APP695 with APP-KM670/671NL (Tg2576). Results: pE3Aβ increased in the AD brain versus age-matched controls, with pE3Aβ/total Aβ at 45 and 10%, respectively. Compared to controls, the AD brain demonstrated 8.5-fold increased pE3Aβ compared to non-pE3Aβ species, which increased 2.7-fold. In the APP/PS1-dKI brain, pE3Aβ/total Aβ increased from 7% at 3 months to 16 and 19% at 15 and 19 months, respectively. In Tg2576, pE3Aβ/total Aβ was only 1.5% at 19 months, suggesting that APP/PS1-dKI, despite less total Aβ compared to Tg2576 at comparable ages, more closely mimics AD brain pathology. Conclusion: This report supports a significant role for pE3Aβ in AD pathogenesis by confirming that pE3Aβ represents a large fraction of Aβ within the AD brain. Compared to the age-matched control brain, pE3Aβ increased to a greater extent compared to Aβ species without this N-terminal modification. Further, the APP/PS1-dKI model more closely resembles the AD brain in this regard, compared to the Tg2576 model.
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DOI:
10.1006/bbrc.1997.7083
发表时间:
1997-08-08
影响因子:
3.1
作者:
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通讯作者:
Roher, AE
DOI:
10.1159/000358901
发表时间:
2014-01-01
期刊:
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影响因子:
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DOI:
10.1016/j.jbbm.2006.04.002
发表时间:
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期刊:
Journal of biochemical and biophysical methods.
影响因子:
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作者:
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DOI:
10.1073/pnas.0507313103
发表时间:
2006-02-28
影响因子:
11.1
作者:
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通讯作者:
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影响因子:
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作者:
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通讯作者:
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