Tetraamine-Derived Bifunctional Chelators for Technetium-99m Labelling: Synthesis, Bioconjugation and Evaluation as Targeted SPECT Imaging Probes for GRP-Receptor-Positive Tumours
作者:Keelara Abiraj、Rosalba Mansi、Maria-Luisa Tamma、Flavio Forrer、Renzo Cescato、Jean Claude Reubi、Kayhan G. Akyel、Helmut R. Maecke
DOI:10.1002/chem.200902011
日期:2010.2.15
groups at the 6‐position for the conjugation of biomolecules and subsequent labelling with 99mTc is described herein. The chelator 01 was used as a starting material for the facile synthesis of chelators functionalised with OH (02), N3 (04) and O‐succinyl ester (05) groups. A straightforward and easy synthesis of carboxyl‐functionalised tetraamine‐based chelator 06 was achieved by using inexpensive and commercially
由于其最佳的核性质,易于获得的价格,低成本和良好的剂量学,99m Tc仍然是医学成像应用的理想放射性同位素。基于四胺骨架的双功能螯合剂表现出与Tc(V)O 2的容易络合,形成具有高体内稳定性和显着亲水性的单阳离子物质,这导致了良好的药代动力学。一系列1,4,8,11-四氮杂十一烷衍生物(的合成01 - 06)含有不同官能团的生物分子,并用随后的标记的缀合的6位99米Tc的本文中所描述。螯合剂01用作合成容易被OH(02),N 3(04)和O-琥珀酸酯(05)基团官能化的螯合剂的原料。通过使用便宜的和可商购的原料,可以轻松,简单地合成羧基官能化的四胺基螯合剂06。将06与强力的蛙皮素-拮抗剂肽缀合并随后用99m Tc进行标记,可得到放射性示踪剂99m Tc-N4-BB-ANT,在37 GBqμmol -1的比活度下,放射性标记收率> 97%。IC 50值为(3.7±1.3)n获得了M,这证实