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Apolipoprotein E is a prime suspect, not just an accomplice, in Alzheimer’s disease

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Abstract

There is now a large body of evidence suggesting that apolipoprotein E (apoE) genotype is the single most important genetic risk factor for the most common (sporadic) form of Alzheimer’s disease. Yet in proportion to the total number of investigations in this field, relatively few groups are studying the contribution of this cholesterol-binding protein to disease risk and severity. Of those that are, a major focus is on the impact of apoE on amyloid-related mechanisms of disease. I argue here that apoE should be considered a major culprit in its own right, not simply in a supporting role. The argument is based on several lines of evidence, including the fact that apoE is associated with both plaques and tangles, the overwhelming evidence for genetic risk of the disease attributed to apoE, increasing evidence that apoE might also modify risk of other nonamyloidogenic neurological diseases, neurotoxicity attributed to apoE and/or proteolytic fragments of apoE, negative consequences of transgenic expression of apoE4 in mice, and genetic evidence for polymorphisms that increase both apoE expression and disease risk, regardless of isoform.

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  1. Department of Neurosurgery, University of Cincinnati College of Medicine, 45267, Cincinnati, OH

    Keith A. Crutcher

  2. ApoLogic, Inc., 45219, Cincinnati, OH

    Keith A. Crutcher

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Crutcher, K.A. Apolipoprotein E is a prime suspect, not just an accomplice, in Alzheimer’s disease. J Mol Neurosci 23, 181–188 (2004). https://doi.org/10.1385/JMN:23:3:181

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