The invention features compounds and methods relating to hydroxy-proline analog inhibitors of the ASCT1 and ASCT2 neutral amino acid transporters useful for diagnostic purposes. These analogs are potent and selective inhibitors of ASCT2 and ASCT1-mediated amino acid transport as evidenced by significantly reduced glutamine or alanine transport-associated currents or radiolabeled substrate (amino acid) uptake in
Xenopus
oocytes expressing ASCT2 or ASCT1. Selectivity has been established in the same manner whereby reduced substrate associated current or substrate uptake is unobserved in
Xenopus
oocytes expressing ATA2, SN1, or EAAT(s) (excitatory amino acid transporter). The compounds and methods of the invention include radiolabeled inhibitors that can be used in research or clinical applications (e.g., for the treatment of cancer or ischemia-related central nervous system injury).
本发明涉及羟基脯
氨酸类似物抑制ASCT1和ASCT2中性
氨基酸转运蛋白的化合物和方法,用于诊断目的。这些类似物是ASCT2和ASCT1介导的
氨基酸转运的有效和选择性
抑制剂,证明了通过显著减少谷
氨酰胺或丙
氨酸转运相关电流或放射性标记底物(
氨基酸)在表达ASCT2或ASCT1的Xenopus卵母细胞中的摄取。选择性已通过相同的方式建立,其中在表达ATA2,SN1或E
AAT(兴奋性
氨基酸转运体)的Xenopus卵母细胞中未观察到减少的底物相关电流或底物摄取。本发明的化合物和方法包括可以用于研究或临床应用的放射性标记
抑制剂(例如,用于癌症或缺血相关的中枢神经系统损伤的治疗)。