[Problem to be solved] To provide a drug delivery system capable of delivering a drug into a cell expressing a VEGF receptor.
[Solution] Provided is a VEGF-binding peptide-drug complex in which a drug is bound to a C-terminal amino acid /or an N-terminal amino acid of a VEGF-binding peptide and is incorporated into a VEGF receptor-expressing cell by endocytosis of a VEGF receptor, the VEGF-binding peptide having a helix-loop-helix structure including an A block that includes a peptide forming an α-helix structure and is positioned on an N-terminal side, a C block that includes a peptide forming an α-helix structure and is positioned on a C-terminal side, and a B block that includes a peptide linking the A block and the C block by a covalent bond.
[有待解决的问题] 提供一种能够向表达血管内皮生长因子受体的细胞中递送药物的药物递送系统。
[解决方案]提供一种血管内皮生长因子结合肽-药物复合物,其中药物与血管内皮生长因子结合肽的 C 端
氨基酸/或 N 端
氨基酸结合,并通过血管内皮生长因子受体的内吞作用结合到表达血管内皮生长因子受体的细胞中、V
EGF结合肽具有螺旋-环-螺旋结构,包括一个A区块,其中包括一个形成α-螺旋结构并位于N-端侧的肽,一个C区块,其中包括一个形成α-螺旋结构并位于C-端侧的肽,以及一个B区块,其中包括一个通过共价键连接A区块和C区块的肽。