ApoE genotype and abnormal auditory cortical potentials in healthy older females

NEUROBIOLOGY OF AGING

卷:31

Article

Irimajiri, Rie^1,2  Golob, Edward J.^3,4  Starr, Arnold^1,2 

[1] Univ Calif Irvine, Dept Neurol, Irvine, CA 92627 USA

[2] Univ Calif Irvine, Inst Brain Aging & Dementia, Irvine, CA 92627 USA

[3] Tulane Univ, Dept Psychol, New Orleans, LA 70118 USA

[4] Tulane Univ, Program Neurosci, New Orleans, LA 70118 USA

关键词: Apolipoprotein E;    Auditory event-related potentials;    Aging;    P300;    P50;   

DOI  :  10.1016/j.neurobiolaging.2008.09.005

来源: Elsevier

【 摘 要 】

Apolipoprotein E (ApoE) status and gender are risk factors for the development of Alzheimer's disease. Alzheimer's disease is more prevalent in female relative to male carriers of the ApoE 84 gene. We examined cortical sensory (P50, N100) and cognitive (P300) potentials in an auditory target detection task in females as a function of ApoE genotype (ApoE epsilon 4 carriers, ApoE epsilon 4 non-carriers) to define the incidence of abnormalities prior to the clinical expression of cognitive impairments. Both neuropsychological test scores and sensory cortical potentials did not differ between the two ApoE groups. In contrast, cognitive P300 potentials were significantly decreased in amplitude and delayed in latency for ApoE epsilon 4 carriers compared to non-carriers. Four out of the 10 ApoE 84 carriers had abnormally (>2S.D.) delayed P300 latency compared to one out of 20 non-carriers. Abnormal cognitive processes reflected by P300 latency delays are expressed at significantly higher incidence in normal older females who are carriers of the epsilon 4 allele than in non-carriers of this allele. (C) 2008 Elsevier Inc. All rights reserved.

【 授权许可】

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