用硫原子改变磷酸肽中磷酸酯键的氧原子,可以立即靶向高尔基体 (GA),并通过酶促自组装选择性杀死癌细胞。具体来说,将半胱胺 S-磷酸与自组装肽的 C 末端缀合会生成硫代磷酸肽。作为碱性磷酸酶 (ALP) 的底物,硫代磷酸肽经历 ALP 催化的快速去磷酸化,形成自组装的硫肽。硫代磷酸肽通过小窝蛋白介导的内吞作用和巨胞饮作用进入细胞,并由于自身和高尔基体蛋白的去磷酸化和在高尔基体中形成二硫键而立即在 GA 中积累。此外,硫代磷酸肽可有效、选择性地抑制癌细胞 (HeLa),IC 50(约 3 μM),比母体磷酸肽强一个数量级。
[EN] THIOPHOSPHOPEPTIDES FOR ULTRAFAST TARGETING OF THE GOLGI APPARATUS<br/>[FR] THIOPHOSPHOPEPTIDES POUR LE CIBLAGE ULTRARAPIDE DE L'APPAREIL DE GOLGI
申请人:UNIV BRANDEIS
公开号:WO2022174058A1
公开(公告)日:2022-08-18
Disclosed are peptides having the structure according to formula (la) or (lb) or (II): wherein NH-Q-C(O) is a peptide chain optionally comprising an amino acid residue having a sidechain covalently bonded to Z2; Z1is a moiety comprising an aromatic group, a therapeutic agent, a fluorophore, or a nanoparticle; Z2is H, a therapeutic agent, a fluorophore, or a nanoparticle; and J, if present (as in lb or II), is a linker between the peptide chain and the thiophosphate group or thioester group. Also disclosed are pharmaceutical compositions that contain a peptide, as well as dephosphorylated peptides of the invention, which may take one or more forms include a nanofiber or a supramolecular hydrogel. Use of the peptides for delivering a therapeutic agent or drug moiety into the Golgi apparatus, imaging a cell, treating a patient having a cancerous condition, treating a patient having Alzheimer's or Parkinson's disease are also disclosed.