Discovery of a class of highly potent Janus Kinase 1/2 (JAK1/2) inhibitors demonstrating effective cell-based blockade of IL-13 signaling
作者:Mark Zak、Emily J. Hanan、Patrick Lupardus、David G. Brown、Colin Robinson、Michael Siu、Joseph P. Lyssikatos、F. Anthony Romero、Guiling Zhao、Terry Kellar、Rohan Mendonca、Nicholas C. Ray、Simon C. Goodacre、Peter H. Crackett、Neville McLean、Christopher A. Hurley、Po-wai Yuen、Yun-Xing Cheng、Xiongcai Liu、Marya Liimatta、Pawan Bir Kohli、Jim Nonomiya、Gary Salmon、Gerry Buckley、Julia Lloyd、Paul Gibbons、Nico Ghilardi、Jane R. Kenny、Adam Johnson
DOI:10.1016/j.bmcl.2019.04.008
日期:2019.6
Disruption of interleukin-13 (IL-13) signaling with large molecule antibody therapies has shown promise in diseases of allergic inflammation. Given that IL-13 recruits several members of the Janus Kinase family (JAK1, JAK2, and TYK2) to its receptor complex, JAK inhibition may offer an alternate small molecule approach to disrupting IL-13 signaling. Herein we demonstrate that JAK1 is likely the isoform most important to IL-13 signaling. Structure-based design was then used to improve the JAK1 potency of a series of previously reported JAK2 inhibitors. The ability to impede IL-13 signaling was thereby significantly improved, with the best compounds exhibiting single digit nM IC50's in cell-based assays dependent upon IL-13 signaling. Appropriate substitution was further found to influence inhibition of a key off-target, LRRK2. Finally, the most potent compounds were found to be metabolically labile, which makes them ideal scaffolds for further development as topical agents for IL-13 mediated diseases of the lungs and skin (for example asthma and atopic dermatitis, respectively).