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CP-105696

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产品价格:电议      采购度:1622      原产地:美洲

发布时间:2021/8/3 15:32:00      所属地区:上海 上海市

简要描述:

CP-105696 是一个有效的、白三烯 B4 (LTB4) 受体的选择性拮抗剂,其 IC50 值为 nM。

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标签:Pfizer   105696   

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CP-105696

CAS No. : 158081-99-3

MCE 站:CP-105696

产品活性:CP-105696 是一个有效的、白三烯 B4 (LTB4) 受体的选择性拮抗剂,其 IC50 值为 8.42 nM。

研究领域:GPCR/G Protein

作用靶点:Leukotriene Receptor

In Vitro: CP-105696 is a structurally novel, selective and potent LTB4 receptor antagonist. In vitro, CP-105696 inhibits [3H]LTB4 (0.3 nM) binding to high-affinity LTB4 receptors on human neutrophils with an lC50 value of 8.42±0.26 nM. Scatchard analyses of [3H]LTB4 binding to these high-affinity receptors indicate that CP-105696 acts as a noncompetitive antagonist. CP-105696 inhibits human neutrophil chemotaxis mediated by LTB4 (5 nM) in a noncompetitive manner with an IC50 value of 5.0±2.0 nM. Scatchard analyses of [3H]LTB4 binding to low-affinity receptors on neutrophils indicate that CP-105696 acts as a competitive antagonist at this receptor, and inhibition of LTB4-mediated CD11b upregulation on human neutrophils is competitively inhibited by CP-105696 (pA2=8.03±0.19). CP-105696 at 10 μM does not inhibit either human neutrophil chemotaxis or CD11b upregulation mediated through alternate (i.e., C5a, lL-8, PAF) G-protein coupled chemotactic factor receptors. In isolated human monocytes, LTB4 (5 nM)-mediated Ca2+ mobilization is inhibited by CP-105696 with an lC50 value of 940±70 nM.

In Vivo: At a dose of 50 mg/kg/day (28 days), B10.BR (H2k) allografts transplanted into C57Bl/6 (H2b) recipients are significantly protected, as reflected by the mean survival time versus control grafts (27±20 days [n=10] vs. 12±6 days [n=14]; P=0.0146). Using an induction protocol (day -1 to day 3), CP-105696 at 100 mg/kg/day significantly prolongs allograft survival (33±23 days [n=9]; P=0.0026), but CP-105696 at 10 mg/kg/day does not (18±16 days [n=8]; P=0.1433). Syngeneic grafts survive indefinitely (n=11). Immunohistological evaluation of allografts at rejection reveals a mononuclear cell infiltrate composed primarily of CD3+ and CD11b+ (Mac-1+) cells, which are infrequent in syngeneic grafts. Allografts from mice treated with CP-105696 at 50 or 100 mg/kg/day demonstrat a selective reduction in β2-integrin (Mac-1) expression on monocytes/macrophages, as demonstrated by CD11b staining density compared with allograft controls.

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更新时间:2024/1/2 10:17:44

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