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Association of cerebrospinal fluid A?42 with A2M gene in cognitively normal subjects.


ABSTRACT: Low cerebrospinal fluid (CSF) A?(42) levels correlate with increased brain A? deposition in Alzheimer's disease (AD), which suggests a disruption in the degradation and clearance of A? from the brain. In addition, APOE ?4 carriers have lower CSF A?(42) levels than non-carriers. The hypothesis of this investigation was that CSF A?(42) levels would correlate with regulatory region variation in genes that are biologically associated with degradation or clearance of A? from the brain. CSF A?(42) levels were tested for associations with A? degradation and clearance genes and APOE ?4. Twenty-four SNPs located within the 5' and 3' regions of 12 genes were analyzed. The study sample consisted of 99 AD patients and 168 cognitively normal control subjects. CSF A?(42) levels were associated with APOE ?4 status in controls but not in AD patients; A2M regulatory region SNPs were also associated with CSF A?(42) levels in controls but not in AD patients, even after adjusting for APOE ?4. These results suggest that genetic variation within the A2M gene influences CSF A?(42) levels.

SUBMITTER: Millard SP 

PROVIDER: S-EPMC3859300 | biostudies-literature | 2014 Feb

REPOSITORIES: biostudies-literature

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Low cerebrospinal fluid (CSF) Aβ(42) levels correlate with increased brain Aβ deposition in Alzheimer's disease (AD), which suggests a disruption in the degradation and clearance of Aβ from the brain. In addition, APOE ε4 carriers have lower CSF Aβ(42) levels than non-carriers. The hypothesis of this investigation was that CSF Aβ(42) levels would correlate with regulatory region variation in genes that are biologically associated with degradation or clearance of Aβ from the brain. CSF Aβ(42) lev  ...[more]

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