A Pyrazolo[3,4-d]pyrimidin-4-amine Derivative Containing an Isoxazole Moiety Is a Selective and Potent Inhibitor of RET Gatekeeper Mutants
摘要:
Aberrant RET kinase signaling plays critical roles in several human cancers such as thyroid carcinoma. The gatekeeper mutants (V804L or V804M) of RET are resistant to currently approved RET inhibitors such as cabozantinib and vandetanib. We, for the first time, report a highly selective and extremely potent RET inhibitor, 6i rationally designed. Compound 6i inhibits strongly RET gatekeeper mutants and other clinically relevant RET mutants as well as wt-RET. This substance also significantly suppresses growth of thyroid cancer-derived TT cell lines and Ba/F3 cells transformed with various RET mutants. Docking studies reveal that the isoxazole moiety in 6i is responsible for binding affinity improvement by providing additional site for H-bonding with Lys758. Also, 6i not only substantially blocks cellular RET autophosphorylation and its downstream pathway, it markedly induces apoptosis and anchorage-independent growth inhibition in TT cell lines while having no effect on normal thyroid Nthy ori-3-1 cells.
A Pyrazolo[3,4-d]pyrimidin-4-amine Derivative Containing an Isoxazole Moiety Is a Selective and Potent Inhibitor of RET Gatekeeper Mutants
摘要:
Aberrant RET kinase signaling plays critical roles in several human cancers such as thyroid carcinoma. The gatekeeper mutants (V804L or V804M) of RET are resistant to currently approved RET inhibitors such as cabozantinib and vandetanib. We, for the first time, report a highly selective and extremely potent RET inhibitor, 6i rationally designed. Compound 6i inhibits strongly RET gatekeeper mutants and other clinically relevant RET mutants as well as wt-RET. This substance also significantly suppresses growth of thyroid cancer-derived TT cell lines and Ba/F3 cells transformed with various RET mutants. Docking studies reveal that the isoxazole moiety in 6i is responsible for binding affinity improvement by providing additional site for H-bonding with Lys758. Also, 6i not only substantially blocks cellular RET autophosphorylation and its downstream pathway, it markedly induces apoptosis and anchorage-independent growth inhibition in TT cell lines while having no effect on normal thyroid Nthy ori-3-1 cells.
[EN] NOVEL 3-(ISOXAZOL-3-YL)-PYRAZOLO[3,4-D]PYRIMIDIN-4-AMINE COMPOUND, WHICH IS RET KINASE INHIBITOR<br/>[FR] NOUVEAU COMPOSÉ 3-(ISOXAZOL-3-YL)-PYRAZOLO[3,4-D]PYRIMIDIN-4-AMINE, QUI EST UN INHIBITEUR DE LA KINASE RET<br/>[KO] RET 키나아제 저해제인 신규 3-(이속사졸-3-일)-피라졸로[3,4-디]피리미딘-4-아민 화합물
申请人:KOREA INST SCI & TECH
公开号:WO2017026718A1
公开(公告)日:2017-02-16
본 발명은 신규 3-(이속사졸-3-일)-피라졸로[3,4-d]피리미딘-4-아민 화합물, 이 화합물 제조방법, 그리고 이 화합물의 RET 키나아제 활성으로 야기되는 각종 암질환의 예방 및 치료에 사용하는 의약용도에 관한 것이다.