A molecular probe for imaging of pancreatic islets is provided. The molecular probe includes a polypeptide represented by the following formula (1), or a polypeptide that has homology with the foregoing polypeptide.
Z-HGEGTFTSDLSKQMEEEAVRLFIEWLKNGGPSSGAPPPSX-NH2 (1) (SEQ I D NO. 1)
wherein "X" represents a lysine residue, the amino group of the side chain of the lysine residue being labeled with a group represented by the following formula (I),
wherein A represents an aromatic hydrocarbon group or an aromatic heterocyclic group; R1 represents a substituent that contains 11C, 13N, 15O, 18F, 64Cu, 67Ga, 68Ga, 75Br, 76Br, 77Br, 99mTc, 111In, 123I, 124I, 125I, or 131I; R2 represents either a hydrogen atom, or a substituent different from that represented by R1; and R3 represents any one of a bond, an alkylene group having 1 to 6 carbon atoms, and an oxyalkylene group having 1 to 6 carbon atoms.
提供了一种用于胰岛成像的分子探针。分子探针包括下式(1)所代表的
多肽或与前述
多肽具有同源性的
多肽。
Z-
HGEGTFT
SDLSKQMEEEAVRLFIEWLKNGGPSSGAPPSX-NH2 (1) (
SEQ I D NO. 1)
其中 "X "代表赖
氨酸残基,赖
氨酸残基侧链的
氨基被下式(I)所代表的基团标记、
其中 A 代表
芳香烃基团或芳香杂环基团;R1 代表含有 11C、13N、15O、18F、64Cu、67Ga、68Ga、75Br、76Br、77Br、99mTc、111In、123I、124I、125I 或 131I 的取代基;R2 代表氢原子或与 R1 所代表的不同的取代基;以及 R3 代表键、具有 1 至 6 个碳原子的亚烷基和具有 1 至 6 个碳原子的氧亚烷基中的任一个。