(5aR)-5a-C-Pentyl-4-epi-isofagomine: A powerful inhibitor of lysosomal β-galactosidase and a remarkable chaperone for mutations associated with GM1-gangliosidosis and Morquio disease type B
作者:Sophie Front、Anna Biela-Banaś、Patricie Burda、Diana Ballhausen、Katsumi Higaki、Anna Caciotti、Amelia Morrone、Julie Charollais-Thoenig、Estelle Gallienne、Stéphane Demotz、Olivier R. Martin
DOI:10.1016/j.ejmech.2016.09.095
日期:2017.1
4-epi-isofagomine as pharmacological chaperones (PC) for human lysosomal β-galactosidase. The two epimers of 4-epi-isofagomine carrying a pentyl group at C-5a, namely (5aR)- and (5aS)-5a-C-pentyl-4-epi-isofagomine, were prepared by an innovative procedure involving in the key step the addition of nitrohexane to a keto-pentopyranoside. Both epimers were evaluated as inhibitors of the human β-galactosidase:
该报告是关于识别,合成和4-衍生物的初始生物学表征外延-isofagomine作为药理学伴侣(PC),用于人溶酶体β半乳糖苷酶。通过创新的方法制备了在C-5a上带有戊基的4- Epi- Isofagomine的两种差向异构体,即(5a R)-和(5a S)-5a- C -pentyl -4- epi - isofagomine。关键步骤是在硝基戊吡喃糖苷中添加硝基己烷。两种差向异构体均被评估为人β-半乳糖苷酶的抑制剂:(5a R)-立体异构体(化合物1)被发现是该酶的一种非常有效的抑制剂(IC 50 = 8 nM,在pH 7.3下比4- Epi- Isofagomine的效力高30倍,并且对这种糖苷酶具有高选择性,而(5a S)差向异构体则是弱得多的抑制剂。另外,化合物1显示出显着的PC活性。它显着增强了23种中的15种患者细胞系中突变型β-半乳糖苷酶的残留活性,其中10种细胞系中的增强因子大于3