Oligoethyleneoxy-Modified 99mTc-Labeled β-Amyloid Imaging Probes with Improved Brain Pharmacokinetics for Single-Photon Emission Computed Tomography
摘要:
An oligoethyleneoxy linker was introduced for conjugation between Tc-99m/Re-bis(aminoethanethiol) (BAT) and beta-amyloid (A beta) binding scaffolds. Rhenium complexes exhibited high to moderate binding affinity to A beta(1-42) aggregates and efficient fluorescent staining to A beta plaques in brain tissue. After radiolabeling, the Tc-99m-labeled probes revealed improved brain pharmacokinetics in normal ICR mice. Probe [Tc-99m]15 with potent binding affinity (K-i = 13.4 nM) and the highest initial brain uptake (2.10% ID/g at 2 min) in normal ICR mice was evaluated further. In vitro autoradiography showed specific labeling of A beta plaques by [Tc-99m]15 in transgenic (Tg) mouse brain tissue. Ex vivo autoradiography further demonstrated its efficient labeling of A beta plaques in a living Tg mouse. In vivo single photon emission computed tomography (SPECT)/CT imaging in six rhesus monkeys revealed remarkably improved brain uptakes (1.94-2.63% ID within 20 min) of [Tc-99m]15, making it highly potential to be used in humans for A beta plaques imaging in the brain.
Stryrylpyridine derivates and theur use for binding and imaging amylod plaques
申请人:Kung F. Hank
公开号:US20080038195A1
公开(公告)日:2008-02-14
This invention relates to a method of imaging amyloid deposits and to styrylpyridine compounds, and methods of making radiolabeled styrylpyridine compounds useful in imaging amyloid deposits. This invention also relates to compounds, and methods of making compounds for inhibiting the aggregation of amyloid proteins to form amyloid deposits, and a method of delivering a therapeutic agent to amyloid deposits.
Styrylpyridine Derivatives and Their Use for Binding and Imaging Amyloid Plaques
申请人:Kung Hank F.
公开号:US20090123369A1
公开(公告)日:2009-05-14
This invention relates to a method of imaging amyloid deposits and to styrylpyridine compounds, and methods of making radiolabeled styrylpyridine compounds useful in imaging amyloid deposits. This invention also relates to compounds, and methods of making compounds for inhibiting the aggregation of amyloid proteins to form amyloid deposits, and a method of delivering a therapeutic agent to amyloid deposits.
Styrylpyridine derivatives and their use for binding and imaging amyloid plaques
申请人:Kung Hank F.
公开号:US08506929B2
公开(公告)日:2013-08-13
This invention relates to a method of imaging amyloid deposits and to styrylpyridine compounds, and methods of making radiolabeled styrylpyridine compounds useful in imaging amyloid deposits. This invention also relates to compounds, and methods of making compounds for inhibiting the aggregation of amyloid proteins to form amyloid deposits, and a method of delivering a therapeutic agent to amyloid deposits.
STYRYLPYRIDINE DERIVATIVES AND THEIR USE FOR BINDING AND IMAGING AMYLOID PLAQUES
申请人:Kung Hank F.
公开号:US20130129624A1
公开(公告)日:2013-05-23
This invention relates to a method of imaging amyloid deposits and to styrylpyridine compounds, and methods of making radiolabeled styrylpyridine compounds useful in imaging amyloid deposits. This invention also relates to compounds, and methods of making compounds for inhibiting the aggregation of amyloid proteins to form amyloid deposits, and a method of delivering a therapeutic agent to amyloid deposits.