Background:

Odanacatib (MK-0822) is a potent, orally active and selective inhibitor of Cathepsin K with IC50 value of 0.20 nM [1],

Cathepsin K is expressed predominantly in osteoclasts and degrades the collagen matrix componentsofbone. It plays a central role in mediating bone resorption. And the inhibitor of cathepsin K, Odanacatib, is in development for the treatment of osteoporosis. Based on preclinical evidence and available clinical data from dose-ranging phase IIB trials, odanacatib appears to reduce bone resorptionwhile somewhat preserving bone formation in postmenopausal

Women. Currently, Odanacatib is undergoing evaluation for fracture risk reduction in a phase III trial with ＞16000 patients with postmenopausal osteoporosis [2].

参考文献:
[1] S. Aubrey Stoch, Stefan Zajic, Julie A. Stone, Deborah L. Miller, Lucas van Bortel, Kenneth C. Lasseter, Barnali Pramanik, Caroline Cilissen, Qi Liu, Lida Liu, Boyd B. Scott, Deborah Panebianco, Yu Ding, Keith Gottesdiener & John A. Wagner. Odanacatib, a selective cathepsin K inhibitor to treat osteoporosis: safety, tolerability, pharmacokinetics and pharmacodynamics –results from single oral dose studies in healthy volunteers. British Journal of Clinical Pharmacology. 2012, 75, (5): 1240-1254.
[2] Matt S. Anderson, Isaias Noel Gendrano, Chengcheng Liu, Steven Jeffers,

Chantal Mahon, Anish Mehta, Kate Mostoller, Stefan Zajic, Denise Morris, Jessie Lee, and S. Aubrey Stoch. Odanacatib, a selective Cathepsin K inhibitor, demonstrates comparable pharmacodynamics and pharmacokinetics in older men and postmenopausal women. Endocrine Research. 2014, 99(2):552–560.