Optimization of Selective Mitogen-Activated Protein Kinase Interacting Kinases 1 and 2 Inhibitors for the Treatment of Blast Crisis Leukemia
作者:Haiyan Yang、Lohitha Rao Chennamaneni、Melvyn Wai Tuck Ho、Shi Hua Ang、Eldwin Sum Wai Tan、Duraiswamy Athisayamani Jeyaraj、Yoon Sheng Yeap、Boping Liu、Esther Hq Ong、Joma Kanikadu Joy、John Liang Kuan Wee、Perlyn Kwek、Priya Retna、Nurul Dinie、Thuy Thi Hanh Nguyen、Shi Jing Tai、Vithya Manoharan、Vishal Pendharkar、Choon Bing Low、Yun Shan Chew、Susmitha Vuddagiri、Kanda Sangthongpitag、Meng Ling Choong、May Ann Lee、Srinivasaraghavan Kannan、Chandra S. Verma、Anders Poulsen、Sharon Lim、Charles Chuah、Tiong Sin Ong、Jeffrey Hill、Alex Matter、Kassoum Nacro
DOI:10.1021/acs.jmedchem.7b01714
日期:2018.5.24
Chronic myeloid leukemia (CML) is a myeloproliferative disease caused by bcr-abll, a constitutively active tyrosine kinase fusion gene responsible for an abnormal proliferation of leukemic stem cells (LSCs). Inhibition of BCR-ABL1 kinase activity offers long-term relief to CML patients. However, for a proportion of them, BCR-ABL1 inhibition will become ineffective at treating the disease, and CML will progress to blast crisis (BC) CML with poor prognosis. BC-CML is often associated with excessive phosphorylated eukaryotic translation initiation factor 4E (eIF4E), which renders LSCs capable of proliferating via self-renewal, oblivious to BCR-ABL1 inhibition. In vivo, eIF4E is exclusively phosphorylated on Ser209 by MNK1/2. Consequently, a selective inhibitor of MNK1/2 should reduce the level of phosphorylated eIF4E and re-sensitize LSCs to BCR-ABL1 inhibition, thus hindering the proliferation of BC LSCs. We report herein the structure activity relationships and pharmacokinetic properties of a selective MNK1/2 inhibitor clinical candidate, ETC-206, which in combination with dasatinib prevents BC-CML LSC self-renewal in vitro and enhances dasatinib antitumor activity in vivo.