Available Technology

Beta-Amyloid and Tau Fibril Positron Emissions Tomography (PET) Imaging Agents

In vitro data available
Patent Abstract: 
The invention relates to two novel classes of compounds useful as radioligands for in vivo imaging of beta-amyloid fibrils, peptides and plaques in humans. Beta-amyloid peptide deposition in the brain is a pathological feature of Alzheimer's disease (AD). Early detection of beta-amyloid load in patients with suspected AD is vital to initiating early treatment, which can improve cognitive function and quality of life for many patients. The invention describes novel derivatives of imidazopyridinylbenzeneamine (IMPY) and benzothizolylbenzeneamine (BTA), which demonstrate high in vitro binding affinity to human beta-amyloid. The difference between existing IMPY compounds and the novel derivatives is the substitution of an aryl halide with an aryl thioether group and replacement of a sulfur group of the pyridine ring with a nitrogen group. The new classes of compounds have the potential of providing improved amyloid imaging agents for Positron Emission Tomography (PET) with higher specificity for amyloid, low background noise, better entry into the brain and improved labeling efficiency.
Lisheng Cai
Patent Number: 
12/293,340 PCT Application No. PCT/US2007/066939 U
Internal Laboratory Ref #: 
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