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Biol Psychiatry. 2010 Nov 15;68(10):913-21. doi: 10.1016/j.biopsych.2010.07.011.

Oxidative stress and amyloid-beta pathology in normal individuals with a maternal history of Alzheimer's.

Author information

  • 1Center for Brain Health, Department of Psychiatry, New York University School of Medicine, New York, New York 10016, USA. lisa.mosconi@nyumc.org

Abstract

BACKGROUND:

Epidemiology and imaging studies showed that cognitively normal (NL) individuals with a maternal history (MH) of late-onset Alzheimer's disease (LOAD) might be at increased risk for Alzheimer's disease (AD) compared with NL with a paternal history (PH) and NL with a negative family history of LOAD (NH). With a panel of cerebrospinal fluid (CSF) markers, this study examined whether NL MH showed evidence for AD pathology compared with PH and NH.

METHODS:

Fifty-nine 40-80-year-old NL subjects were examined, including 23 MH and 14 PH whose parents had a clinician-certified diagnosis of LOAD and 22 NH. All subjects completed clinical neuropsychological examinations and a lumbar puncture to measure CSF levels of amyloid-beta (Aβ(40), Aβ(42), Aβ(42/40)), total and hyperphosphorylated tau (T-Tau and P-Tau(231); markers of axonal degeneration and neurofibrillary tangles, respectively), and F₂-isoprostanes (IsoP) (a marker of oxidative stress).

RESULTS:

Groups were comparable for demographic and neuropsychological measures. The MH subjects showed higher IsoP and reduced Aβ(42/40) CSF levels compared with NH and with PH (p values ≤ .05), whereas no differences were found between NH and PH. No group differences were found for P-Tau(231) and T-Tau. The IsoP and Aβ(42/40) levels were correlated only within the MH group (R² = .32, p = .005) and discriminated MH from the other subjects with 70% accuracy (relative risk = 3.7%, 95% confidence interval = 1.6-9.7, p < .001). Results remained significant controlling for age, gender, education, and apolipoprotein E genotype.

CONCLUSIONS:

Adult children of LOAD-affected mothers express a pathobiological phenotype characterized by Aβ-associated oxidative stress consistent with AD, which might reflect increased risk for developing the disease.

Published by Elsevier Inc.

PMID:
20817151
[PubMed - indexed for MEDLINE]
PMCID:
PMC2967599
Free PMC Article

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