Synthesis and Evaluation of 11C-Labeled Imidazo[2,1-b]benzothiazoles (IBTs) as PET Tracers for Imaging β-Amyloid Plaques in Alzheimer’s Disease
摘要:
We report a novel series of C-11-labeled imidazo[2,1-b]benzothiazoles (IBTs) as tracers for imaging of cerebral beta-amyloid (A beta) deposits in patients with Alzheimer's disease (AD) by means of positron emission tomography (PET). From a series of 11 compounds, candidates were identified to have a high binding affinity for A beta. Selected compounds were prepared as O- or N-[C-11]methyl derivatives and shown to have a high initial brain uptake in wild-type mice (range 1.9-9.2% I.D./g at 5 min). 2-(p-[C-11]Methylaminophenyl)-7-methoxyimidazo[2,1-b] benzothiazole ([C-11]5) was identified as a lead based on the combined favorable properties of high initial brain uptake, rapid clearance from normal brain, and high in vitro affinity for A beta(1-40) (K-i = 3.5 nM) and A beta(1-42) (5.8 nM), which were superior to the Pittsburgh compound B (1a). In an APP/PSI mouse model of AD (Tg), we demonstrate a specific uptake of [C-11]5 in A beta-containing telencephalic brain regions by means of small-animal PET that was confirmed by regional brain biodistribution, ex vivo autoradiography, and immunohistochemistry. Analysis of brain sections of Tg mice receiving a single bolus injection of [C-11]5 and [H-3]1a together revealed that the tracers bind to A beta plaques in the brain of Tg mice in a comparable pattern. Taken together, these data suggest that IBTs represent useful PET imaging agents for high-sensitivity detection of A beta plaques.
DOI:
10.1021/jm101129a
作为产物:
描述:
2-氨基-6-甲氧基苯并噻唑 、 2-溴-4’-(1-吡咯烷基)苯乙酮 以to afford (295 mg, 84% yield in a purity>95%的产率得到2-(4-(pyrrolidin-1-yl)phenyl)-7-methoxyimidazo[2,1-b]benzothiazole
参考文献:
名称:
Compounds for Non-Invasive Measurement of Aggregates of Amyloid Peptides
Compounds for non-invasive measurement of aggregates of amyloid peptides
申请人:Technische Universität München
公开号:EP2218464A1
公开(公告)日:2010-08-18
The invention relates to the provision of compounds, methods for producing them, and their use for imaging and quantification of aggregates of amyloid peptides in vivo. In a preferred aspect of the invention, a tracer is administered to humans and displays enrichment in the areas that are containing amyloid plaques. Tracers of the invention can be used for in vivo visualization and quantification of aggregates of amyloid peptides in patients affected diseases characterized in the generation of aggregates of amyloid peptides, for example familial or sporadic Alzheimer's disease and type II diabetes. Tracers of the invention can be used for monitoring effects of amyloid-modulating therapies of patients affected with diseases characterized in the generation of aggregates of amyloid peptides, for example familial or sporadic Alzheimer's disease and type II diabetes.
Imaging Agents Useful for Identifying AD Pathology
申请人:Kolb Hartmuth C.
公开号:US20100098634A1
公开(公告)日:2010-04-22
Provided herein are compounds and compositions which comprise the formulae as disclosed herein, wherein the compound is an amyloid binding compound. An amyloid binding compound according to the invention may be administered to a patient in amounts suitable for in vivo imaging of amyloid deposits, and distinguish between neurological tissue with amyloid deposits and normal neurological tissue. Amyloid probes of the invention may be used to detect and quantitate amyloid deposits in diseases including, for example, Down's syndrome, familial Alzheimer's Disease. In another embodiment, the compounds may be used in the treatment or prophylaxis of neurodegenerative disorders. Also provided herein are methods of allowing the compound to distribute into the brain tissue, and imaging the brain tissue, wherein an increase in binding of the compound to the brain tissue compared to a normal control level of binding indicates that the mammal is suffering from or is at risk of developing a neurodegenerative disease.
Compounds for Non-Invasive Measurement of Aggregates of Amyloid Peptides
申请人:Gjermund Henriksen
公开号:US20120070374A1
公开(公告)日:2012-03-22
The invention relates to the provision of compounds, methods for producing them, and their use for imaging and quantification of aggregates of β-amyloid peptides in vivo. In a preferred aspect of the invention, a tracer is administered to humans and displays enrichment in body parts that are containing aggregates of amyloid peptides. Tracers of the invention can be used for non-invasive depiction and quantification of aggregates of β-amyloid peptides in humans affected with diseases that are characterized in the generation of such aggregates.
[EN] IMAGING AGENTS USEFUL FOR IDENTIFYING AD PATHOLOGY<br/>[FR] AGENTS D'IMAGERIE UTILES POUR IDENTIFIER UNE PATHOLOGIE
申请人:SIEMENS MEDICAL SOLUTIONS
公开号:WO2010011964A2
公开(公告)日:2010-01-28
Provided herein are compounds and compositions which comprise the formulae as disclosed herein, wherein the compound is an amyloid binding compound. An amyloid binding compound according to the invention may be administered to a patient in amounts suitable for in vivo imaging of amyloid deposits, and distinguish between neurological tissue with amyloid deposits and normal neurological tissue. Amyloid probes of the invention may be used to detect and quantitate amyloid deposits in diseases including, for example, Down's syndrome, familial Alzheimer's Disease. In another embodiment, the compounds may be used in the treatment or prophylaxis of neurodegenerative disorders.. Also provided herein are methods of allowing the compound to distribute into the brain tissue, and imaging the brain tissue, wherein an increase in binding of the compound to the brain tissue compared to a normal control level of binding indicates that the mammal is suffering from or is at risk of developing a neurodegenerative disease.