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.
咪唑并[1,2- a ]吡啶衍生物和6-溴黄酮之间的有效交叉偶联反应已得到很好的建立。该反应通过钯催化的交叉偶联反应进行,以良好至优异的收率提供咪唑并[1,2- a ]吡啶-黄酮杂化物。该方法的主要优点是反应时间短、产率高、底物范围广。使用 SYBR Green I 测定,检查了这些杂合分子对氯喹敏感的 3D7 和氯喹耐药的恶性疟原虫K1 菌株的抗疟原虫活性。化合物9o {IC 50 s (μM) 1.98 3D7 , 1.98 K1 } 和9p {IC50 s (μM) 1.92 3D7 , 5.45 K1 }被发现是该系列中最有效的抗疟原虫化合物。此外,所有这些化合物均被发现对 Vero 细胞无细胞毒性,其 CC 50 s > 100 µM。我们对化合物9o和9p进行了显微镜检查实验,结果对疟疾寄生虫的生长产生了巨大影响。还在野生型Pf -DHFR-TS(恶性疟原虫)的结合位点中检查了
Microwave-assisted synthesis and antimicrobial activities of flavonoid derivatives
作者:Sherif B. Abdel Ghani、Louise Weaver、Zidan H. Zidan、Hussein M. Ali、C. William Keevil、Richard C.D. Brown
DOI:10.1016/j.bmcl.2007.11.081
日期:2008.1
Eleven flavonoid derivatives were synthesised using a modified Baker-Venkataraman rearrangement, and subsequent microwave-assisted closure of the heterocyclic ring. All of the synthetic compounds displayed antifungal activity against Aspergillus niger and Fusarium oxysporium, and two of the synthetic flavonoid analogues exhibited significant activity against methicillin-resistant Staphylococcus aureus
Composition For Diagnosing Amyloid-Related Diseases
申请人:Mori Hiroshi
公开号:US20080131367A1
公开(公告)日:2008-06-05
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 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.