Rapid progression from mild cognitive impairment to Alzheimer's disease in subjects with elevated levels of tau in cerebrospinal fluid and the APOE epsilon4/epsilon4 genotype.

Abstract:

BACKGROUND/AIMS:Increased cerebrospinal fluid (CSF) tau, decreased CSF amyloid-beta42 (Abeta42) and the apolipoprotein E gene (APOE) epsilon4 allele predict progression from mild cognitive impairment (MCI) to Alzheimer's disease (AD). Here, we investigated these markers to assess their predictive value and influence on the rate of disease progression. METHODS:Using ELISA, we measured the CSF biomarkers in 47 AD patients, 58 patients with MCI and 35 healthy control subjects. Twenty-eight MCI patients revisited the clinic and half of them progressed to AD during a period of 3-12 years. RESULTS:The expected changes in CSF total (T)-tau, phosphorylated (P)-tau and Abeta42 levels were found in AD, confirming the diagnostic value of these biomarkers. We were also able to corroborate an increased risk for progression from MCI to AD with elevated CSF T-tau and P-tau and with the presence of the APOE epsilon4/epsilon4 genotype, but not with decreased Abeta42. Finally, for the first time we demonstrated that MCI subjects with high CSF T-tau or P-tau and APOE epsilon4 homozygosity progressed faster from MCI to AD. CONCLUSIONS:CSF T-tau and P-tau as well as the APOE epsilon4/epsilon4 genotype are robust predictors of AD and are also associated with a more rapid progression from MCI to AD.

authors

Blom ES,Giedraitis V,Zetterberg H,Fukumoto H,Blennow K,Hyman BT,Irizarry MC,Wahlund LO,Lannfelt L,Ingelsson M

doi

10.1159/000216841

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

458-64

issue

5

eissn

1420-8008

issn

1421-9824

pii

000216841

journal_volume

27

pub_type

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