Journal
JOURNAL OF MEDICINAL CHEMISTRY
Volume 62, Issue 11, Pages 5370-5381Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jmedchem.8b02027
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Funding
- NSFC [81703576, 81502902]
- Shanghai Municipal Health Bureau Scientific Research Project [201840185, 20154Y0005]
- Committee of Science and Technology Young Scientific Research Foundation of Shanghai [16ZR1431900]
- Guangci Distinguished Young Scholars Training Program [GCQN-2017-A16, GCQN-2017-B22]
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Targeting RANKL/RANK offers the possibility of developing novel therapeutic approaches to treat bone metabolic diseases. Multiple efforts have been made to inhibit RANKL. For example, marketed monoclonal antibody drug Denosumab could inhibit the maturation of osteoclasts by binding to RANKL. This study is an original approach aimed at discovering small-molecule inhibitors impeding RANKL/RANK protein interaction. We identified compound 34 as a potent and selective RANKL/RANK inhibitor by performing structure-based virtual screening and hit optimization. Disruption of the RANKL/RANK interaction by 34 effectively inhibits RANKL-induced osteoclastogenesis and bone resorption. The expression of osteoclast marker genes was also suppressed by treatment of 34. Furthermore, 34 markedly blocked the NFATc1/c-fos pathway. Thus, our current work demonstrates that the chemical tractability of the difficult PPI (RANKL/RANK) target by a small-molecule compound 34 offers a potential lead compound to facilitate the development of new medications for bone related diseases.
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