Spatial relation between microbleeds and amyloid deposits in amyloid angiopathy.

Spatial relation between microbleeds and amyloid deposits in amyloid angiopathy.
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DOI:
10.1002/ana.22099
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发表时间:
2010-10
影响因子:
11.2
通讯作者:
Greenberg, Steven M.
Greenberg, Steven M.
中科院分区:
医学1区
文献类型:
--
作者:
Dierksen, Gregory A.;Skehan, Maureen E.;Khan, Muhammad A.;Jeng, Jed;Nandigam, R. N. Kaveer;Becker, John A.;Kumar, Ashok;Neal, Krista L.;Betensky, Rebecca A.;Frosch, Matthew P.;Rosand, Jonathan;Johnson, Keith A.;Viswanathan, Anand;Salat, David H.;Greenberg, Steven M.

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Advanced cerebrovascular β-amyloid deposition (cerebral amyloid angiopathy, CAA) is associated with cerebral microbleeds, but the precise relationship between CAA burden and microbleeds is undefined. We used T2*-weighted MRI and noninvasive amyloid imaging with Pittsburgh Compound B (PiB) to analyze the spatial relationship between CAA and microbleeds. On co-registered PET and MRI images, PiB retention was increased at microbleed sites compared to simulated control lesions (p=0.002) and declined with increasing distance from the microbleed (p<0.0001). These findings indicate that microbleeds occur preferentially in local regions of concentrated amyloid and support therapeutic strategies aimed at reducing vascular amyloid deposition.
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