lai-1

LAI-1 is a regulator of bacterial signaling, modulating gene regulation and cellular responses of eukaryotic cells (amoebae or macrophages) and a variety of processes including pathogen-host cell interactions.

14S(15R)-EET is an oxylipin and a cytochrome P450 metabolite of arachidonic acid .114S(15R)-EET binds to isolated guinea pig monocytes with a Kivalue of 612.5 nM in a competitive binding assay using [3H]14(15)-EET.2It induces dilation of precontracted isolated canine epicardial arterioles (EC50= 4 pM) and denuded porcine subepicardial arterioles (EC50= 3 pM).3Unlike 14R(15S)-EET, 14S(15R)-EET does not inhibit COX in enzyme assays or isolated platelets.4 1.Daikh, B.E., Lasker, J.M., Raucy, J.L., et al.Regio- and stereoselective epoxidation of arachidonic acid by human cytochromes P450 2C8 and 2C91J. Pharmacol. Exp. Ther.271(3)1427-1433(1994) 2.Wong, P.Y.-K., Lai, P.-S., and Falck, J.R.Mechanism and signal transduction of 14 (R), 15 (S)-epoxyeicosatrienoic acid (14,15-EET) binding in guinea pig monocytesProstaglandins Other Lipid Mediat.62(4)321-333(2000) 3.Zhang, Y., Oltman, C.L., Lu, T., et al.EET homologs potently dilate coronary microvessels and activate BKCa channelsAm. J. Physiol. Heart Circ. Physiol.280(6)H2430-H2440(2001) 4.Fitzpatrick, F.A., Ennis, M.D., Baze, M.E., et al.Inhibition of cyclooxygenase activity and platelet aggregation by epoxyeicosatrienoic acidsJ. Biol. Chem.261(2)15334-15338(1986)

16α-Hydroxyetiocholanolone is a metabolite of 16α-hydroxydehydroisoandrosterone (16α-DHEA) and androstenedione.1,2 1.Lai, E.Y., and Solomon, S.The in vivo metabolism of 16ɑ-hydroxydehydroisoandrosterone in manBiochemistry6(7)2040-2052(1967) 2.Christakoudi, S., Cowan, D.A., Christakudis, G., et al.21-hydroxylase deficiency in the neonate - trends in steroid anabolism and catabolism during the first weeks of lifeJ. Steroid Biochem. Mol. Biol.138334-347(2013)

Colletodiol is a fungal metabolite that has been found inD. grovesiiand has immunosuppressant and antiviral activities.1,2It inhibits concanavalin A- or LPS-induced proliferation of isolated mouse splenocytes (IC50s = 12 and 5 μg ml, respectively).1Colletodiol inhibits influenza A viral replication in HeLa-IAV-Luc cells.2 1.Fujimoto, H., Nagano, J., Yamaguchi, K., et al.Immunosuppressive components from an ascomycete, Diplogelasinospora grovesiChem. Pharm. Bull.46(3)423-429(1998) 2.Lai, W., Wang, S., and Ye, X.Colletodiol inhibits the replication of influenza A virus WSN H1N1 by reducing the activity of viral RNA polymeraseWei Sheng Wu Xue Bao53(12)1334-1339(2013)

PF-04449613 is a phosphodiesterase 9A (PDE9A) inhibitor (IC50= 22 nM).1It is selective for PDE9A over PDE1C (IC50= >1,000 nM), as well as over a variety of other PDEs, inhibiting PDE2-8, -10, and -11 activity by less than 30% in a panel of enzymes, ion channels, and transporters at 1 μM but does inhibit the human dopamine transporter (DAT; Ki= 293 nM). PF-04449613 (0.1-100 mg kg, s.c.) increases cerebrospinal fluid (CSF) levels of cyclic GMP (cGMP) in rats. Subcutaneous administration of PF-04449613 (10 mg kg) increases the rate of dendritic spine formation and elimination in mouse primary motor cortex pyramidal neuronsin vivo.2It increases the average running speed of mice in an accelerating rotarod task, indicating improved motor learning, at the same dose. 1.Claffey, M.M., Helal, C.J., Verhoest, P.R., et al.Application of structure-based drug design and parallel chemistry to identify selective, brain penetrant, in vivo active phosphodiesterase 9A inhibitorsJ. Med. Chem.55(21)9055-9068(2012) 2.Lai, B., Li, M., Hu, A., et al.The phosphodiesterase 9 inhibitor PF-04449613 promotes dendritic spine formation and performance improvement after motor learningDev. Neurobiol.78(9)859-872(2018)