Browsing by Author "Maya, Juan Diego"
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- ItemInhibitory effect of nordihydroguaiaretic acid and its tetra-acetylated derivative on respiration and growth of adenocarcinoma TA3 and its multiresistant variant TA3MTX-R(2008) Plaza, Claudio; Pavani, Mario; Faúndez Cáceres, Mario; Maya, Juan Diego; Morello, Antonio; Becker C., María Inés; De Ioannes I., Alfredo E.; Cumsille, Miguel Angel; Ferreira, Jorge
- ItemTrypanosoma cruzi: Activities of lapachol and alpha- and beta-lapachone derivatives against epimastigote and trypomastigote forms(PERGAMON-ELSEVIER SCIENCE LTD, 2008) Salas, Cristian; Tapia, Ricardo A.; Ciudad, Karina; Armstrong, Veronica; Orellana, Myriam; Kemmerling, Ulrike; Ferreira, Jorge; Maya, Juan Diego; Morello, AntonioDerivatives of natural quinones with biological activities, such as lapachol, alpha- and beta-lapachones, have been synthesized and their trypanocidal activity evaluated in vitro in Trypanosoma cruzi cells. All tested compounds inhibited epimastigote growth and trypomastigote viability. Several compounds showed similar or higher activity as compared with current trypanocidal drugs, nifurtimox and benznidazole. The results presented here show that the anti-T Cruzi activity of the alpha-lapachone derivatives can be increased by the replacement of the benzene ring by a pyridine moiety. Free radical production and consequently oxidative stress through redox cycling or production of electrophilic metabolites are the potential biological mechanism of action for these synthetic quinones. (c) 2007 Elsevier Ltd. All rights reserved.