Aromatic glycosyl disulfide derivatives: Evaluation of their inhibitory activities against Trypanosoma cruzi
作者:Bessy Gutiérrez、Christian Muñoz、Luis Osorio、Krisztina Fehér、Tünde-Zita Illyés、Zsuzsa Papp、Ambati Ashok Kumar、Katalin E. Kövér、Hernán Sagua、Jorge E. Araya、Patricio Morales、László Szilágyi、Jorge González
DOI:10.1016/j.bmcl.2013.04.030
日期:2013.6
Aromatic oligovalent glycosyl disulfides and some diglycosyl disulfides were tested against three different Trypanosoma cruzi strains. Di-(beta-D-galactopyranosyl-dithiomethylene) benzenes 2b and 4b proved to be the most active derivatives against all three strains of cell culture-derived trypomastigotes with IC50 values ranging from 4 to 11 mu M at 37 degrees C. The inhibitory activities were maintained, although somewhat lowered, at a temperature of 4 degrees C as well. Three further derivatives displayed similar activities against at least one of the three strains. Low cytotoxicities of the active compounds, tested on confluent HeLa, Vero and peritoneal macrophage cell cultures, resulted in significantly higher selectivity indices (SI) than that of the reference drug benznidazole. Remarkably, several molecules of the tested panel strongly inhibited the parasite release from T. cruzi infected HeLa cell cultures suggesting an effect against the intracellular development of T. cruzi amastigotes as well. (C) 2013 Elsevier Ltd. All rights reserved.
Interactions of aromatic mannosyl disulfide derivatives with Concanavalin A: synthesis, thermodynamic and NMR spectroscopy studies
作者:Bandaru Narasimha Murthy、Sharmistha Sinha、Avadhesha Surolia、Narayanaswamy Jayaraman、László Szilágyi、Ildikó Szabó、Katalin E. Kövér
DOI:10.1016/j.carres.2009.06.008
日期:2009.9
alpha-D-Mannopyranosyl units were attached to an aromatic scaffold through disulfide linkages to obtain mono- to trivalent glycosylated ligands for lectinbindingstudies. Isothermaltitrationcalorimetric (ITC) measurements indicated that binding affinities of these derivatives to Concanavalin A (Con A) were comparable to or slightly higher than that of methyl alpha-D-mannopyranoside (K(a) values in the range of