Biological assessment of novel bisphosphonate-containing 99mTc/Re-organometallic complexes
作者:Célia Fernandes、Sofia Monteiro、Patrícia Mendes、Lurdes Gano、Fernanda Marques、Sandra Casimiro、Luís Costa、João D.G. Correia、Isabel Santos
DOI:10.1016/j.jorganchem.2013.10.038
日期:2014.6
Aimed at finding complexes of the same family with improved bone-seeking properties and adequate tumor cell uptake profile, we have synthesized novel complexes of the type fac-[M(CO)3(k3-L)]+ (M = 99mTc/Re, Tc3/Re3–Tc5/Re5) stabilized by bifunctional chelators with different molecular weight, overall charge, (lipo)hydrophilic nature and different positions of BP attachment. Biodistribution studies in
骨寻求放射性药物如放射性标记的二膦酸盐(BPS)结合骨基质中增加的骨转换的区域,metastization站点的特性,选择性地递送γ辐射或β -用于分别骨成像或骨疼痛减轻,粒子。最近的临床前研究表明,含氮的BP也可能具有直接的抗肿瘤活性。我们最近推出了一套99m Tc-有机金属复合物,可将γ射线和BP同时递送至骨组织。为了找到具有改善的寻骨特性和足够的肿瘤细胞摄取特征的同一家族的复合物,我们合成了fac- [M(CO)3(k3 - L)] +(M = 99m Tc / Re,Tc3 / Re3 – Tc5 / Re5)通过具有不同分子量,总电荷,(脂)亲水性质和BP连接位置的双功能螯合剂稳定。在正常小鼠中进行的生物分布研究表明,其中BP单元(阿仑膦酸盐)位于吡唑基环的4位的Tc3表现出最有利的药代动力学特征,具有快速的血液清除,高的骨吸收(在1时为17.1±3.6%IA / g h pi),并且比黄金标准99m