Design, Synthesis, and Biological Characterization of a Caspase 3/7 Selective Isatin Labeled with 2-[18F]fluoroethylazide
摘要:
Imaging of programmed cell death (apoptosis) is important in the assessment of therapeutic response in oncology and for diagnosis in cardiac and neurodegenerative disorders. The executioner caspases 3 and 7 ultimately effect cellular death, thus providing selective molecular targets for in vivo quantification of apoptosis. To realize this potential, we aimed to develop F-18-labeled isatin sulfonamides with high metabolic,stability and moderate lipophilicity while retaining selectivity and affinity for caspase 3/7. A small library of isatins modified with fluorinated aromatic groups and heterocycles was synthesized. A lead compound incorporating 2'-fluoroethyl-1,2,3-triazole was identified with subnanomolar affinity for caspase 3. "Click labeling" provided the F-18-labeled tracer in 65 +/- 6% decay-corrected radiochemical yield from 2-[F-18]fluoroethylazide. The compound showed high stability in vivo with rapid uptake and elimination in healthy tissues and tumor. The novel F-18-labeled isatin is a candidate radiotracer for further preclinical evaluation for imaging of apoptosis.
Design, Synthesis, and Biological Characterization of a Caspase 3/7 Selective Isatin Labeled with 2-[18F]fluoroethylazide
摘要:
Imaging of programmed cell death (apoptosis) is important in the assessment of therapeutic response in oncology and for diagnosis in cardiac and neurodegenerative disorders. The executioner caspases 3 and 7 ultimately effect cellular death, thus providing selective molecular targets for in vivo quantification of apoptosis. To realize this potential, we aimed to develop F-18-labeled isatin sulfonamides with high metabolic,stability and moderate lipophilicity while retaining selectivity and affinity for caspase 3/7. A small library of isatins modified with fluorinated aromatic groups and heterocycles was synthesized. A lead compound incorporating 2'-fluoroethyl-1,2,3-triazole was identified with subnanomolar affinity for caspase 3. "Click labeling" provided the F-18-labeled tracer in 65 +/- 6% decay-corrected radiochemical yield from 2-[F-18]fluoroethylazide. The compound showed high stability in vivo with rapid uptake and elimination in healthy tissues and tumor. The novel F-18-labeled isatin is a candidate radiotracer for further preclinical evaluation for imaging of apoptosis.
ISATIN DERIVATIVES FOR USE AS IN VIVO IMAGING AGENTS
申请人:Aboabye Eric Ofori
公开号:US20110195024A1
公开(公告)日:2011-08-11
Isatin 5-sulfonamide derivatives, pharmaceutical compositions comprising the derivatives, their use as molecular imaging agents, their use for the diagnosis or treatment of diseases or disorders associated with dysregulation of apoptosis, methods for synthesizing the derivatives, methods for the molecular imaging of caspase activity and apoptosis, and methods of assessing the therapeutic effect of a test substance on caspase activity are disclosed.
Design, Synthesis, and Biological Characterization of a Caspase 3/7 Selective Isatin Labeled with 2-[<sup>18</sup>F]fluoroethylazide
作者:Graham Smith、Matthias Glaser、Meg Perumal、Quang-De Nguyen、Bo Shan、Erik Årstad、Eric O. Aboagye
DOI:10.1021/jm801107u
日期:2008.12.25
Imaging of programmed cell death (apoptosis) is important in the assessment of therapeutic response in oncology and for diagnosis in cardiac and neurodegenerative disorders. The executioner caspases 3 and 7 ultimately effect cellular death, thus providing selective molecular targets for in vivo quantification of apoptosis. To realize this potential, we aimed to develop F-18-labeled isatin sulfonamides with high metabolic,stability and moderate lipophilicity while retaining selectivity and affinity for caspase 3/7. A small library of isatins modified with fluorinated aromatic groups and heterocycles was synthesized. A lead compound incorporating 2'-fluoroethyl-1,2,3-triazole was identified with subnanomolar affinity for caspase 3. "Click labeling" provided the F-18-labeled tracer in 65 +/- 6% decay-corrected radiochemical yield from 2-[F-18]fluoroethylazide. The compound showed high stability in vivo with rapid uptake and elimination in healthy tissues and tumor. The novel F-18-labeled isatin is a candidate radiotracer for further preclinical evaluation for imaging of apoptosis.