Amino Acids Labeled with [<sup>99m</sup>Tc(CO)<sub>3</sub>]<sup>+</sup> and Recognized by the <scp>l</scp>-type Amino Acid Transporter LAT1
作者:Yu Liu、Jae Kyoung Pak、Paul Schmutz、Matthias Bauwens、John Mertens、Hector Knight、Roger Alberto
DOI:10.1021/ja066002m
日期:2006.12.1
We have synthesized amino acids conjugated at the alpha-carbon through an alkyl spacer to a small tripod ligand. The tripod coordinates to the fac-[M(CO)3]+ moiety (M = Re, 99mTc). Depending on the lengths of the spacers, these metal complexes with pendent alpha-amino acids are recognized and transported by the l-type amino acid transporter LAT1. The best result was achieved with a butyl spacer. The
我们已经合成了通过烷基间隔与小三脚架配体在 α-碳上共轭的氨基酸。三脚架坐标到 fac-[M(CO)3]+ 部分(M = Re,99mTc)。根据间隔物的长度,这些带有悬垂α-氨基酸的金属复合物被l型氨基酸转运蛋白LAT1识别和转运。最好的结果是使用丁基间隔物实现的。相应复合物的 Ki 值与人工氨基酸 BCH 的 Ki 值相当。[3H]-l-苯丙氨酸的流出表明标记的氨基酸不仅与转运蛋白结合,而且被转运到细胞中。这些是第一个被积极内化到细胞内空间的金属标记的小分子。