(±)-Licarin A ((±)-trans-Dehydrodiisoeugenol) is a dihydrobenzofuran neolignan, the resultant of an oxidative coupling reaction of isoeugenol and horseradish peroxidase (HRP) enzyme. (±)-Licarin A shows 100% parasites mortality at 200 μM.
SUN-C5174 is a sleective 5-HT2 antagonist (pA2=8.98+/-0.06). SUN C5174 showed a marked inhibitory effect on the platelet aggregation induced by serotonin in combination with collagen and adenosine diphosphate (ADP) in canine or human platelet-rich plasma
Neospiramycin I is a macrolide antibiotic and derivative of spiramycin I.1It is active against the macrolide-sensitive KB210, but not the macrolide-resistant KB224, strain ofS. aureus(MICs = 3.12 and >100 μg/ml, respectively), as well asB. cereus,B. subtilis,M. luteus,E. coli, andK. pneumoniae(MICs = 1.56, 3.12, 3.12, 0.2, 50, and 12.5 μg/ml, respectively). Neospiramycin I binds toE. coliribosomes with an IC50value of 1.2 μM. It protects against mortality in a mouse model ofS. pneumoniaetype III infection (ED50= 399.8 mg/kg).2
Monocerin is a fungal metabolite that has been found inF. larvarumand has diverse biological activities.1,2,3It is active against the bacteriaE. coliandB. megaterium, the phytopathogenic fungusM. violaceum, and the algaC. fuscain an agar diffusion assay when used at a concentration of 50 μg/disc.1Monocerin (17.5 μg/ml) induces mortality in adultC. erythrocephala.2It reduces root elongation in pre-germinatedS. halepenseseeds when used at a concentration of 33 ppm.3
1.Zhang, W., Krohn, K., Draeger, S., et al.Bioactive isocoumarins isolated from the endophytic fungus Microdochium bolleyiJ. Nat. Prod.71(6)1078-1081(2008) 2.Claydon, N., Grove, J.F., and Pople, M.Insecticidal secondary metabolic products from the entomogenous fungus Fusarium larvarumJ. Invertebr. Pathol.33(3)364-367(1979) 3.Robeson, D.J., and Strobel, G.A.Monocerin, a phytotoxin from Exserohilum turcicum (Drechslera turcica)Agr. BioI. Chem.46(11)2681-2683(1982)
Tetranactin is a macrotetrolide and a monovalent cation ionophore that has been found in S. aureus and has antibacterial, insecticidal, and mitogenic activities. It exhibits an equilibrium permeability ratio 1,000-fold greater for lithium than sodium or cesium ions accross bilayer membranes at low voltages. Tetranactin inhibits the growth of Gram-positive bacteria and C. miyabeanus and R. solani fungi when used at concentrations less than 0.9 μg/ml. Tetranactin (0.5-1.5 μg per insect) dose-dependently increases the mortality of adult C. chinensis weevils up to 100% and has mitogenic activity against T. telarius when sprayed onto plants with an LC50 value of 9.2 μg/ml. It reduces IL-1β- and cAMP-induced secretion of phospholipase A2 (PLA2) from rat mesangial cells (IC50s = 43 and 33 nM, respectively). Tetranactin (50 ng/ml) suppresses the proliferation of human T lymphocytes induced by allogeneic cells and IL-2 and supresses the generation of cytotoxic T lymphocytes in mixed lymphocyte cultures. In vivo, tetranactin (10 mg/animal per day) completely inhibits the formation of experimental autoimmune uveoretinitis (EAU) in rats.
Phenylpyropene A is a fungal metabolite originally isolated from P. griseofulvum that has enzyme inhibitory and insecticidal activities.1,2,3 It inhibits acyl-coenzyme A:cholesterol acyltransferase (ACAT; IC50 = 0.8 μM).1 Phenylpyropene A inhibits diacylglycerol acyltransferase (DGAT) in rat liver microsomes (IC50 = 78.7 μM). It induces mortality in 100% of M. persicae when used at a concentration of 5 ppm.3
|1. Kwon, O.E., Rho, M.C., Song, H.Y., et al. Phenylpyropene A and B, new inhibitors of acyl-CoA: Cholesterol acyltransferase produced by Penicillium griseofulvum F1959. J. Antibiot. (Tokyo) 55(11), 1004-1008 (2002).|2. Lee, S.W., Rho, M.C., Choi, J.H., et al. Inhibition of diacylglycerol acyltransferase by phenylpyropenes produced by Penicillium griseofulvum F1959. J. Microbiol. Biotechnol. 18(11), 1785-1788 (2008).|3. Horikoshi, R., Goto, K., Mitomi, M., et al. Identification of pyripyropene A as a promising insecticidal compound in a microbial metabolite screening. J. Antibiot. (Tokyo) 70(3), 272-276 (2017).