In the intact platelet, R 59-022 is able to interrupts thrombin-induced inositol lipid cycling at the level of diacylglycerol and leads to an elevation of protein kinase C activity[1]. R 59-022 (10 μM) potentiates aggregation, but not shape change induced by sub-maximal concentrations of thrombin. R59022 (10 μM) had no significant effect on the dose-response curve for the mobilization of intracellular Ca2+ by thrombin in either the presence or the absence of extracellular Ca2+[2]. R 59-022, an inhibitor of filovirus entry, prevents the macropinocytic uptake of filoviral particles, inhibits entry mediated by multiple filovirus GPs, and blocks replicative EBOV growth. R 59-022 blocks entry of EBOV pseudotypes in a concentration-dependent manner (IC50: ~5 µM). R 59-022 dose-dependent decreases in entry by the VLPs harboring the EBOV GP (IC50: ~2 µM). R 59-022 (2-12 μM; 1 hour) can inhibit EBOV GP-mediated entry in multiple cell types. R 59-022 (5 µM; 30 minutes) blocks macropinocytosis in vero cells[5].
Kinase Assay
Cell Assay
Animal Administration
References
[1]. de Chaffoy de Courcelles DC, et al. R 59 022, a diacylglycerol kinase inhibitor. Its effect on diacylglycerol and thrombin-induced C kinase activation in the intact platelet. J Biol Chem. 1985 Dec 15;260(29):15762-70.
[2]. Nunn DL, et al. A diacylglycerol kinase inhibitor, R59022, potentiates secretion by and aggregation of thrombin-stimulated human platelets. Biochem J. 1987 May 1;243(3):809-13.
[3]. Jones JA, et al. Influence of phorbol esters, and diacylglycerol kinase and lipase inhibitors on noradrenalinerelease and phosphoinositide hydrolysis in chromaffin cells. Br J Pharmacol. 1990 Nov;101(3):521-6.
[4]. Boroda S, et al. Dual activities of ritanserin and R59022 as DGKα inhibitors and serotonin receptor antagonists. Biochem Pharmacol. 2017 Jan 1;123:29-39.
[5]. Stewart CM, et al. A Diacylglycerol Kinase Inhibitor, R-59-022, Blocks Filovirus Internalization in Host Cells. Viruses. 2019 Mar 1;11(3). pii: E206.
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