Discovery of a Potent Dihydrooxadiazole Series of Non-ATP-Competitive MK2 (MAPKAPK2) Inhibitors
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- 作者：Jun Qin ; Pawan Dhondi ; Xianhai Huang ; Robert Aslanian ; James Fossetta ; Fang Tian ; Daniel Lundell ; Anandan Palani
- 刊名：ACS Medicinal Chemistry Letters
- 出版年：2012
- 出版时间：February 9, 2012
- 年：2012
- 卷：3
- 期：2
- 页码：100-105
- 全文大小：336K
- 年卷期：v.3,no.2(February 9, 2012)
- ISSN：1948-5875
文摘
Inhibition of MK2 has been shown to offer advantages over that of p38 MAPK in the development of cures for inflammatory diseases such as arthritis. P38 MAPK knockout in mice was lethal, whereas MK2-null mice demonstrated strong inhibition of disease progression in collagen-induced arthritis and appeared normal and viable. However, it is challenging to develop ATP-competitive MK2 inhibitors due to high ATP binding affinity to the kinase. Non-ATP-competitive MK2 inhibitors interact and bind to the kinase in a mode independent of ATP concentration, which could provide better selectivity and cellular potency. Therefore, it is desirable to identify non-ATP-competitive MK2 inhibitors. Through structure optimization of lead compound 1, a novel series of dihydrooxadiazoles was discovered. Additional structure鈥揳ctivity relationship (SAR) study of this series led to the identification of compound 38 as a non-ATP-competitive MK2 inhibitor with potent enzymatic activity and good cellular potency. The SAR, synthesis, and biological data of dihydrooxadiazole series are discussed.