To image apoptosis in vivo, a small, membrane‐permeable probe comprising a caspase 3 substrate, a fluorogenic dye, and a radionuclide was synthesized (see scheme). This dual‐modality probe was specifically cleaved by caspase 3 upon exposure to apoptotic cells, allowing the imaging of caspase 3 activities (see figure) and apoptosis by using both optical and nuclear imaging techniques.
为了在体内对细胞凋亡进行成像,合成了一种包含半胱天冬酶 3 底物、荧光
染料和放射性核素的小型透膜探针(参见方案)。这种双模态探针在暴露于凋亡细胞时被 caspase 3 特异性切割,从而允许使用光学和核成像技术对 caspase 3 活性(见图)和细胞凋亡进行成像。