SB 747651A dihydrochloride

SB-747651A dihydrochloride is an ATP-competitive mitogen- and stress-activated kinase 1 (MSK1) inhibitor with an IC50 of 11 nM. SB-747651A dihydrochloride also inhibits PRK2, RSK1, p70S6K and ROCK-II. SB-747651A dihydrochloride can be used for inflammation research[1].

Signaling Pathways >> MAPK/ERK Pathway >> p38 MAPK

Research Areas >> Inflammation/Immunology

IC50: 11 nM (MSK1)[1]

SB-747651A dihydrochloride (5 μM; neutrophils) affects CXCL2-induced intraluminal crawling of neutrophils in a Mac-1-dependent manner. SB-747651A dihydrochloride thwarts the intraluminal crawling of adherent neutrophils to optimal sites of emigration. SB-747651A dihydrochloride (5 μM; neutrophils) significantly increases transmigration time and detachment time. SB-747651A dihydrochloride affects mechanisms that regulate transendothelial migration of neutrophils in response to CXCL2 chemotactic gradient. SB-747651A dihydrochloride inhibits the migration speed of extravascular chemotaxing neutrophils but does not affect their directionality in response to CXCL2 chemotactic gradient[2].

SB747651A (3 mg/kg; intrascrotal injection) dihydrochloride results in increased neutrophil adhesion 3.5~4.5 hours following stimulation with CXCL2 as compared to the effect of CXCL2[3]. SB-747651A (3 mg/kg; i.p.) dihydrochloride affects neutrophil extravasation by increasing neutrophil emigration only at 3 and 4 hours in mouse peritonitis model of acute inflammation[3]. Animal Model: Male C57BL/6N mice (8~16 weeks)[3] Dosage: 3 mg/kg Administration: Intrascrotal injection Result: Resulted in increased neutrophil adhesion 3.5~4.5 hours following stimulation with CXCL2 as compared to the effect of CXCL2.

[1]. Shaista Naqvi, et al. Characterization of the cellular action of the MSK inhibitor SB-747651A. Biochem J. 2012 Jan 1;441(1):347-57.

[2]. Feiner B, et al. Risperidone effects on heterochromatin: the role of kinase signaling. Clin Exp Immunol. 2019;196(1):67-75.

[3]. Hossain M, et al. The Specific Mitogen- and Stress-Activated Protein Kinase MSK1 Inhibitor SB-747651A Modulates Chemokine-Induced Neutrophil Recruitment. Int J Mol Sci. 2017;18(10):2163. Published 2017 Oct 17.