| Prevalence of asymptomatic vasogenic edema in pretreatment Alzheimer's disease study cohorts from phase 3 trials of semagacestat and solanezumab. | |
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MedLine Citation:
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PMID: 21784350 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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BACKGROUND: Cerebral vasogenic edema (VE) has been reported to occur during antiamyloid immunotherapy. VE may be associated with central nervous system pathology with blood-brain barrier disruptions; however, less is known about the prevalence of naturally occurring VE in patients with Alzheimer's disease (AD). METHODS: Fluid-attenuated inversion recovery imaging sequences were obtained from four ongoing multicenter, randomized, double-blind, placebo-controlled, phase 3 trials in patients with mild-to-moderate AD. The first set of baseline scans was from patients in volumetric magnetic resonance imaging addenda in the Interrupting Alzheimer's Dementia by EvaluatiNg Treatment of Amyloid PaThologY (IDENTITY) studies examining semagacestat, a γ-secretase inhibitor (cohort 1, n = 621). The second set of baseline scans was from the EXPanding alzhEimer's Disease InvestigaTIONs (EXPEDITION) studies examining solanezumab, an anti-Aβ monoclonal antibody (cohort 2, n = 2141). Readers were blinded to patient-identifying information and future treatment. A third set of baseline scans was from the first 700 patients who underwent protocol-specified magnetic resonance imaging before randomization in the EXPEDITION studies (cohort 3). The analysis used three neuroradiologists: two performed independent primary interpretations and the third was the adjudicator. Readers were blinded to patient information, treatment, protocol, and time point. RESULTS: Four cases of asymptomatic VE were detected at baseline/screening. Two VE cases were due to underlying extra-axial mass lesions. The third VE case was associated with numerous microhemorrhages in keeping with cerebral amyloid angiopathy-related inflammation or Aβ-related angiitis. The final VE case demonstrated localized sulcal fluid-attenuated inversion recovery imaging hyperintensity. No VE was detected in cohort 3 by readers blinded to patient baseline status. CONCLUSIONS: VE seems to be rare at baseline in patients with AD in clinical trials, 2 of 2762 associated with AD. Additional cohorts should be evaluated to support these findings. |
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Authors:
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Christopher Carlson; Wahiba Estergard; Joonmi Oh; Joyce Suhy; Clifford R Jack; Eric Siemers; Jerome Barakos |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Alzheimer's & dementia : the journal of the Alzheimer's Association Volume: 7 ISSN: 1552-5279 ISO Abbreviation: Alzheimers Dement Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-07-25 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101231978 Medline TA: Alzheimers Dement Country: United States |
Other Details:
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Languages: eng Pagination: 396-401 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 The Alzheimer's Association. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Eli Lilly and Company, Indianapolis, IN, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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