Author | Maia, Claudia | |
Author | Rangel, Adriana Lanfredi | |
Author | Anjos, Karla Graziela Santana dos | |
Author | Oliveira, Marcus Fernandes de | |
Author | Souza, Wanderley de | |
Author | Santos, Marcos André Vannier dos | |
Access date | 2016-07-21T12:29:14Z | |
Available date | 2016-07-21T12:29:14Z | |
Document date | 2008 | |
Citation | MAIA, C. et al. Effects of a putrescine analog on Giardia lamblia. Parasitology Research, v. 103, p. 363–370, 2008. | pt_BR |
ISSN | 0932-0113 | pt_BR |
URI | https://www.arca.fiocruz.br/handle/icict/15020 | |
Language | eng | pt_BR |
Publisher | Springer Verlag | pt_BR |
Rights | open access | pt_BR |
Title | Effects of a putrescine analog on Giardia lamblia | pt_BR |
Type | Article | pt_BR |
DOI | 10.1007/s00436-008-0981-9 | |
Abstract | The protozoan Giardia lamblia is the most frequent intestinal parasite of first-world countries and a major cause of waterborne disorder often referred to as traveler's diarrhea. We have previously noticed that the putrescine analog 1,4-diamino-2-butanone (DAB) remarkably inhibits the growth of anaerobic trichomonad and Trypanosoma cruzi parasites. Here, we examined the role of polyamines in Giardia cells using this putrescine analog. DAB impaired parasite proliferation dose-dependently. The analog induced increased flagella numbers and sometimes four ventral disks as well as asymmetrical division, indicating truncated or deregulated cytokinesis. Electron microscopy analysis revealed that DAB also triggered the encystment process. Oxidative stress was evaluated by measuring lipid peroxidation by thiobarbituric acid reactive substances (TBARS) detection. Trophozoites incubated either with 1 mM of DAB or putrescine for 18 h displayed increased lipoperoxide levels. Addition of 200 microM aminoguanidine, a polyamine/diamine oxidase inhibitor, partially reverted the DAB, but not the putrescine effects, indicating that the DAB effects are due, at least in part, to DAB oxidation end products. These data indicate that polyamines play a role in Giardia cell division, differentiation, and antioxidant defenses. | pt_BR |
Affilliation | Universidade Federal do Rio de Janeiro. Instituto de Biofísica Carlos Chagas Filho. Rio de Janeiro, RJ, Brasil | pt_BR |
Affilliation | Fundação Gonçalo Moniz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil | pt_BR |
Affilliation | Fundação Gonçalo Moniz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil | pt_BR |
Affilliation | Universidade Federal do Rio de Janeiro. Bioquímica Médica. Rio de Janeiro, RJ, Brasil | pt_BR |
Affilliation | Universidade Federal do Rio de Janeiro. Instituto de Biofísica Carlos Chagas Filho. Rio de Janeiro, RJ, Brasil | pt_BR |
Affilliation | Fundação Gonçalo Moniz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil | pt_BR |
Subject | Animals | pt_BR |
Subject | Giardia lamblia | pt_BR |
Subject | Oxidative Stress | pt_BR |
Subject | Polyamines | pt_BR |
Subject | Putrescine | pt_BR |
Subject | Trophozoites | pt_BR |