The Synthesis and in vitro Evaluation of a 99mTechnetium-Nitroimidazole Complex Based on a Bis(amine-phenol) Ligand: Comparison to BMS-181321
摘要:
We have developed a (99m)Technetium complex for imaging of hypoxic tissue (BMS-181321). Recently, another nitroimidazole derivative, based upon a bis(amine-phenol) ligand, was described in the patent literature. To compare this compound to BMS-181321, we have synthesized the ligand, prepared its Tc-99m complex, and evaluated its performance in two in vitro assays of bioefficacy: membrane permeability and uptake in normoxic and anoxic cardiocytes. In attempting to reproduce the synthesis of the ligand described in the patent application, we found that one intermediate could not be made by the method described, and alternative routes were investigated. Complexation of the bis(amine-phenol) nitroimidazole with Tc-99m gave an apparent single complex; this appeared as a broad peak on HPLC analysis. Purification by a solid-phase method gave a complex with 95% radiochemical purity. This complex was not permeable to cultured bovine brain endothelial cells nor did it show preferential uptake in anoxic myocytes.
Diagnostic imaging methods using rhenium and technetium complexes
申请人:Bracco International B.V.
公开号:US05688487A1
公开(公告)日:1997-11-18
Novel methods, processes and metal complexes attached to a hypoxia-localizing moiety comprising a metal, preferably radionuclide of rhenium or technetium; a hypoxia-localizing moiety; and, a complexing ligand, wherein said ligand and said radionuclide combined have cell membrane permeabilities greater than that of sucrose, are disclosed.
Rhenium and technetium complexes containing a hypoxia-localizing moiety
申请人:——
公开号:US20020054853A1
公开(公告)日:2002-05-09
Novel methods, processes and metal complexes attached to a hypoxia-localizing moiety comprising
a metal, preferably radionuclide of rhenium or technetium;
a hypoxia-localizing moiety; and,
a complexing ligand, wherein said ligand and said radionuclide combined have cell membrane permeabilities greater than that of sucrose, are disclosed.
RHENIUM AND TECHNETIUM COMPLEXES CONTAINING A HYPOXIA-LOCALIZING MOIETY
申请人:——
公开号:US20040010127A1
公开(公告)日:2004-01-15
Novel methods, processes and metal complexes attached to a hypoxia-localizing moiety comprising
a metal, preferably radionuclide of rhenium or technetium;
a hypoxia-localizing moiety; and,
a complexing ligand, wherein said ligand and said radionuclide combined have cell membrane permeabilities greater than that of sucrose, are disclosed.