Tpl2 kinase inhibitor is an inhibitor of tumor progression locus 2 (Tpl2; IC50= 0.05 μM).1It is selective for Tpl2 over MEK, p38 MAPK, Src, MK2, and PKC (IC50s = >40, 180, >400, 110, and >400 μM, respectively). Tpl2 kinase inhibitor inhibits LPS-induced TNF-α production in isolated human monocytes and whole blood (IC50s = 0.7 and 8.5 μM, respectively). It enhances differentiation induced by calcitriol in HL-60 and U937 leukemia cells when used at a concentration of 5 μM.2Tpl2 kinase inhibitor (5 μM) inhibits the proliferation of KG-1a leukemia cells.3 1.Garvin, L.K., Green, N., Hu, Y., et al.Inhibition of Tpl2 kinase and TNF-α production with 1,7-naphthyridine-3-carbonitriles: Synthesis and structure-activity relationshipsBioor. Med. Chem. Lett.15(23)5288-5292(2005) 2.Wang, X., and Studzinski, G.P.Expression of MAP3 kinase COT1 is up-regulated by 1,25-dihydroxyvitamin D3 in parallel with activated c-jun during differentiation of human myeloid leukemia cellsJ. Steroid. Biochem. Mol. Biol.121(1-2)395-398(2010) 3.Wang, X., Gocek, E., Novik, V., et al.Inhibition of Cot1/Tlp2 oncogene in AML cells reduces ERK5 activation and up-regulates p27Kip1 concomitant with enhancement of differentiation and cell cycle arrest induced by silibinin and 1,25-dihydroxyvitamin D3Cell Cycle9(22)4542-4551(2010)
10-Pyrene-PC is a substrate for all PLA2s with the exception of cPLA2 and PAF-AH. Upon phospholipid hydrolysis, 10-pyrenyldecanoic acid is produced from 10-pyrene-PC. The monomeric 10-pyrenyldecanoic acid exhibits fluorescence (excitation 345 nm, emission 395 nm), allowing quantitation of phospholipase activity.
N-p-Tosyl-Gly-Pro-Lys-pNA is a colorimetric substrate for plasmin.1,2,3Plasmin binds and hydrolyzes N-p-tosyl-Gly-Pro-Lys-pNA to releasep-nitroanilide (pNA), which can be quantified by colorimetric detection at 405 nm as a measure of plasmin activity. 1.Jespersen, J., Gram, J., and Astrup, T.The autodigestion of human plasmin follows a bimolecular mode of reaction subject to product inhibitionThromb. Res.41(3)395-404(1986) 2.Kim, S.H., and Choi, N.S.Electrophoretic analysis of protease inhibitors in fibrin zymographyAnal. Biochem.270(1)179-181(1999) 3.Chen, T., and Rael, E.D.Purification of M5, a fibrinolytic proteinase from Crotalus molossus molossus venom that attacks complementInt. J. Biochem. Cell Biol.29(5)789-799(1997)