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Updated: Jun 14, 2026

Positron Emission Tomography Using 64-Copper as a Tracer for the Study of Copper-Related Disorders
Published on: April 28, 2023
Development of highly sensitive fluorescent probes for detection of intracellular copper(I) in living systems
Masayasu Taki1, Shohei Iyoshi, Akio Ojida
1Graduate School of Human and Environmental Studies, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan. taki@chem.mbox.media.kyoto-u.ac.jp
Abstract:
We describe here the new copper-selective fluorescent probes FluTPA1 and FluTPA2, in which the tetradentate ligand tris[(2-pyridyl)methyl]amine (TPA) is connected to a reduced form of a fluorescein platform through a benzyl ether linkage. These probes selectively react with copper ions in the presence of submillimolar glutathione and emit intense green fluorescence from the reaction product, O-methylfluorescein. Confocal images of live cells further show that FluTPA2 is membrane-permeable and allows visualization of Cu(I) present in living cells.

