Dana Farber Cancer Institute, Harvard Medical School, Department of Cancer Biology and Department of Biological Chemistry and Molecular Pharmacology, Boston, Massachusetts 02115, USA.
J Med Chem. 2010 Aug 12;53(15):5439-48. doi: 10.1021/jm901808w.
The second generation of Bcr-Abl inhibitors nilotinib, dasatinib, and bosutinib developed to override imatinib resistance are not active against the T315I "gatekeeper" mutation. Here we describe a type-II T315I inhibitor 2 (GNF-7), based upon a 3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one scaffold which is capable of potently inhibiting wild-type and T315I Bcr-Abl as well as other clinically relevant Bcr-Abl mutants such as G250E, Q252H, Y253H, E255K, E255V, F317L, and M351T in biochemical and cellular assays. In addition, compound 2 displayed significant in vivo efficacy against T315I-Bcr-Abl without appreciable toxicity in a bioluminescent xenograft mouse model using a transformed T315I-Bcr-Abl-Ba/F3 cell line that has a stable luciferase expression. Compound 2 is among the first type-II inhibitors capable of inhibiting T315I to be described and will serve as a valuable lead to design the third generation Bcr-Abl kinase inhibitors.
第二代针对伊马替尼耐药突变的 Bcr-Abl 抑制剂尼洛替尼、达沙替尼和博舒替尼对“守门员”T315I 突变没有活性。在这里,我们描述了一种基于 3,4-二氢嘧啶并[4,5-d]嘧啶-2(1H)-酮骨架的 II 型 T315I 抑制剂 2,它能够强烈抑制野生型和 T315I Bcr-Abl 以及其他临床相关的 Bcr-Abl 突变体,如 G250E、Q252H、Y253H、E255K、E255V、F317L 和 M351T,在生化和细胞测定中。此外,化合物 2 在使用表达稳定荧光素酶的转化 T315I-Bcr-Abl-Ba/F3 细胞系的生物发光异种移植小鼠模型中,对 T315I-Bcr-Abl 具有显著的体内疗效,而没有明显的毒性。化合物 2 是首批能够抑制 T315I 的 II 型抑制剂之一,将作为设计第三代 Bcr-Abl 激酶抑制剂的有价值的先导物。