Radioiodinated Flavones for in Vivo Imaging of β-Amyloid Plaques in the Brain
摘要:
In vivo imaging of beta-amyloid (A beta) peptide aggregates in the brain may lead to early detection of Alzheimer's disease (AD) and monitoring of the progression and effectiveness of AD treatment. The purpose of this study was to develop novel amyloid imaging agents based on flavone as a core structure. Radioiodinated flavone derivatives were designed and synthesized. The binding affinities of flavone derivatives for A beta aggregates varied from 13 to 77 nM. When in vitro plaque labeling was carried out using post-mortem AD brain sections, all flavones intensely stained not only amyloid plaques but also cerebrovascular amyloids. In biodistribution studies using normal mice, they displayed high brain uptakes ranging from 3.2 to 4.1% ID/g at 2 min postinjection. The radioactivity washed out from the brain rapidly (0.5-1.9% ID/g at 30 min), which is highly desirable for amyloid imaging agents. The results in the study suggest that these classes of radioiodinated flavones may be useful candidates as potential imaging agents for amyloid plaques.
Composition for diagnosing amyloid-related diseases
申请人:Nagasaki University
公开号:US08192717B2
公开(公告)日:2012-06-05
A composition for diagnosing amyloid-related diseases, which comprises a flavone derivative, a chalcone derivative, a styrylchromone derivative, or a coumarin derivative, is provided. These compounds have high binding specificity to an amyloid β protein, high permeability to a blood-brain barrier, and ability to rapidly disappear from sites other than cerebral senile plaque. Accordingly, the composition of the present invention using these compounds enables the diagnosis of amyloid-related diseases with high precision.
COMPOSITION FOR AMYLOID-ASSOCIATED DISEASE DIAGNOSIS
申请人:Nagasaki University
公开号:EP1815872A1
公开(公告)日:2007-08-08
A composition for diagnosing amyloid-related diseases, which comprises a flavone derivative, a chalcone derivative, a styrylchromone derivative, or a coumarin derivative, is provided. These compounds have high binding specificity to an amyloid β protein, high permeability to a blood-brain barrier, and ability to rapidly disappear from sites other than cerebral senile plaque. Accordingly, the composition of the present invention using these compounds enables the diagnosis of amyloid-related diseases with high precision.