Research Area
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Description
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Neurological Disease |
Biological Activity
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Description
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Odanacatib (MK 0822) is a potent, selective, and neutral inhibitor of human and rabbit cathepsin K with IC50 of 0.2 nM and 1 nM , respectively. |
Targets
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Human Cathepsin K |
Rabbit Cathepsin K |
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IC50 |
0.2 nM |
1 nM [1] |
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In Vitro
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In vitro, Odanacatib shows the high inhibitory activity and selectivity on cathepsin K with IC50 values of 0.2 nM and 1 nM for human cathepsin K and rabbit cathepsin K, respectively. Furthermore, Odanacatib also shows similar potencies in whole human cell enzyme occupancy assays with corrected IC50 of 5 nM. [1] A recent study shows that Odanacatib results in reduction of Osteoclast (OC) resorption activity by interrupting intracellular vesicular trafficking. [2] |
In Vivo
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In preclinical rats, Odanacatib (10 mg/kg) exhibits excellent pharmacokinetics with clearance (Cl: 2 mL kg-1 min-1), low volume of distribution (Vdss: 1.1 L kg-1), half-life (T1/2: 6 hours) and oral bioavailability (F: 8%), respectively. Besides, Odanacatib also exhibits excellent metabolic stability in rat hepatocytes with a 96% recovery of the parent identity. [1] Odanacatib (ODN) administrated by p.o. prevents bone loss in ovariectomized (OVX) rabbits in a dose-related manner. Moreover, Odanacatib (9?μM/day) leads to a significant increase in proximal femur bone mineral density (BMD) (7.8%), femoral neck BMD (10.8%) and the greater trochanter BMD (6.5%). [3] In the estrogen-deficient, skeletally mature rhesus monkeys, long-term treatment with Odanacatib effectively inhibits bone turnover without reducing osteoclast number and maintains normal biomechanical properties of the spine of OVX nonhuman primates. [4] |
Clinical Trials
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Odanacatib (MK 0822) is currently in Phase I clinical trials in patients with Osteoporosis. Combination of Odanacatib (MK 0822), cholecalciferol andcalcium carbonate is currently in Phase II clinical trials in patients with Osteoporosis Postmenopausal. |
Features
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Odanacatib (MK 0822) is a potent, selective, and neutral cathepsin K inhibitor. |
Protocol
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Animal Study
[3]
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Animal Models |
Ovariectomized (OVX) rabbit model |
Formulation |
Odanacatib is provided in a diet formulae. |
Doses |
≤9?μM/day |
Administration |
Administered via p.o. |
References |
[1] Gauthier JY, et al. Bioorg Med Chem Lett. 2008, 18(3), 923-928.
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[2] Leung P, et al. Bone. 2011, 49(4), 623-635.
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[3] Pennypacker BL, et al. J Bone Miner Res. 2011, 26(2):252-262.
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[4] Masarachia PJ, et al. J Bone Miner Res. 2012, 27(3), 509-523.
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