ApoE polymorphism and acute stroke: a study with diffusion- and perfusion-weighted MRI and MR angiography.

Abstract:

OBJECTIVES:We examined whether the apolipoprotein E (ApoE) allele epsilon4 influences imaging findings in stroke as assessed by diffusion- (DWI) and perfusion-weighted (PWI) magnetic resonance imaging, and MR angiography (MRA). METHODS:Eight ApoE epsilon4 carriers and 15 non-carriers with acute ischemic stroke in the anterior circulation underwent DWI, PWI, and MRA within 24 h of stroke. DWI and PWI were repeated a week later. The apparent diffusion coefficient, relative cerebral volume (rCBV), relative cerebral blood flow (rCBF) and relative mean transit time were measured in three subregions on day one. RESULTS:In the ischemic core and the area of infarct growth, rCBV values were significantly higher in the epsilon4 carriers compared with the non-carriers. Based on the MRA findings, collateral blood flow was better in the epsilon4 carriers than in the non-carriers. Under the comparable severity of hypoperfusion, the hypoperfused area proceeded to infarction later or did not proceed to infarction at all in the non-carriers. CONCLUSION:These preliminary data suggest that in the ApoE allele epsilon4 carriers the threshold for the brain tissue to survive hypoperfusion versus to proceed to infarction seems to be different from that of the non-carriers.

journal_name

Acta Neurol Scand

authors

Liu Y,Nuutinen J,Laakso MP,Karonen JO,Soimakallio S,Aronen HJ,Vanninen RL

doi

10.1111/j.1600-0404.2006.00654.x

subject

Has Abstract

pub_date

2006-11-01 00:00:00

pages

323-8

issue

5

eissn

0001-6314

issn

1600-0404

pii

ANE654

journal_volume

114

pub_type

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