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BMS-066

CAS No. : 914946-88-6

MCE 站：BMS-066

产品活性：BMS-066 是 IKKβ/Tyk2 的抑制剂，其 IC₅₀ 值分别为 9 nM，72 nM。

研究领域：NF-κB  |  JAK/STAT Signaling  |  Epigenetics  |  Stem Cell/Wnt

作用靶点：IKK  |  JAK

In Vitro: BMS-066 is shown to inhibit IKKβ-catalyzed phosphorylation of IKKβ in vitro with an IC₅₀ of 9 nM and is more than 500-fold selective for IKKβ over the closely related IKKα. To understand the selectivity on a more comprehensive scale, BMS-066 is assayed against 155 additional kinases at 10 μM, and only six of these kinases are inhibited more than 75%. This indicates that BMS-066 is more than 400-fold selective for IKKβ over more than 95% of the kinases tested. For the six kinases showing more than 75% inhibition at 10 μM, IC₅₀ values are determined in dose-response assays and BMS-066 is shown to be more than 30-fold selective against even the next most potently inhibits kinase (Brk). BMS-066 inhibits LPS-stimulated cytokine production in human peripheral blood mononuclear cells, both at the protein and message level, with IC₅₀ values of approximately 200 nM against these endpoints. BMS-066 inhibits the IKKβ-catalyzed phosphorylation of IkBα in LPS stimulated cells with a similar IC₅₀ value. BMS-066 shows IC₅₀ values of 72 and 1020 nM against the Tyk2 pseudokinase domain probe displacement and IL-23-stimulated reporter assays, respectively.

In Vivo: Once daily oral doses of 5 and 10 mg/kg starting at the time of adjuvant injection on day 1 significantly reduces paw swelling compared with vehicle-treated rats at the end of the study, with the high dose showing nearly complete suppression. The talocrural (ankle) joint space is narrowed. Inflammatory exudates containing neutrophils and cell debris are also evident within the joint space. The joints from animals receiving 10 mg/kg BMS-066 are normal or show minimal changes in both inflammation and bone resorption. Clear reduction of inflammation is also evident in the low dose of BMS-066 (5 mg/kg) and the bone resorption seems to be more focal and less severe compared with the control. Microcomputed tomography of the hind limbs also show that BMS-066 provides a dose-dependent protection against the pitting, loss of bone mass, woven porous bone, and fusion of the small bones evident in the rats. Bone density measurements also show a clear dose-dependent benefit of treatment with BMS-066. Serum drug level measurements in satellite animals on the first day of dosing show that a single dose provides coverage for approximately 3 h (6 h daily with twice daily dosing) of the mouse whole-blood IC₅₀ value against LPS-induced TNF-α. It is also showed that IKKβ inhibitors suppress TNF-α and IL-1β production within these tissues in experimental arthritis model.

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