SCH 546738_product_DataBase

Bioactivity

SCH 546738 is a potent, orally active and non-competitive CXCR3 antagonist, the affinity constant (Ki) of SCH 546738 binding to human CXCR3 receptor is determined to be 0.4 nM in multiple experiments.

Invitro

The affinity of SCH 546738 binding to human CXCR3 receptor is determined by competition binding analysis using 35S radiolabeled SCH 535390 (a sulfonamide analog of the CXCR3 compound series with a Kd of 0.6 nM) as a competitive tracer. In addition, SCH 546738 displaces radiolabeled CXCL10 and CXCL11 from human CXCR3 with IC50 ranging from 0.8 to 2.2 nM in a non-competitive manner. SCH 546738 potently and specifically inhibits CXCR3-mediated chemotaxis in human activated T cells with IC90 about 10 nM. Competition of human CXCL10 and CXCL11 binding to human CXCR3 by SCH 546738 is determined at various concentrations of [125I]hCXCL10 and [125I]hCXCL11 around the Kd (50-100 pM) for the receptor. The IC50 of SCH 546738 is constant (~1 or 2 nM) and independent of the input concentrations of either [125I]hCXCL10 (25-500 pM) or [125I]hCXCL11 (12.5-250 pM), respectively[1].

In Vivo

SCH 546738 has strong cross-species activities with IC50 of 1.3 nM, 6.4 nM, 5.9 nM and 4.2 nM in inhibiting the binding of [125I]hCXCL10 to CXCR3 of monkey, dog, mouse and rat origin, respectively. SCH 546738 is a selective and potent CXCR3 antagonist with a good PK for in vivo studies. In addition, SCH 546738 has a favourable pharmacokinetic profile in rodents, the plasma concentrations of SCH 546738 in Lewis rat and C57BL/6 mouse over 24 hr post-dose. The AUC (0-24 hr) is 7.7 μM.hr in Lewis rat 10 mg/kg (mpk) and is 12.6 μM.hr in C57BL/6 mouse 30 mpk[1].

Name

SCH 546738

CAS

906805-42-3

Formula

C23H31Cl2N7O

Molar Mass

492.44

Appearance

Solid

Transport

Room temperature in continental US; may vary elsewhere.

Storage

Powder	-20°C	3 years
	4°C	2 years
In solvent	-80°C	6 months
	-20°C	1 month

Reference

[1]. Jenh CH, et al. A selective and potent CXCR3 antagonist SCH 546738 attenuates the development of autoimmune diseases and delays graft rejection. BMC Immunol. 2012 Jan 10;13:2. [2]. Zhang X, et al. CXC chemokine receptor 3 promotes steatohepatitis in mice through mediating inflammatory cytokines, macrophages and autophagy. J Hepatol. 2016 Jan;64(1):160-70. [3]. Yue C, et al. STAT3 in CD8+ T Cells Inhibits Their Tumor Accumulation by Downregulating CXCR3/CXCL10 Axis. Cancer Immunol Res. 2015 Aug;3(8):864-870.

PeptideDB

SCH 546738

CAS: 906805-42-3 F: C23H31Cl2N7O W: 492.44