New insights about cross-reactive epitopes of six trypanosomatid genera revealed that Crithidia and Leptomonas have antigenic similarity to L. (L.) chagasi

New insights about cross-reactive epitopes of six trypanosomatid genera revealed that Crithidia and Leptomonas have antigenic similarity to L. (L.) chagasi

Author Ferreira, Leandro Rodrigues Google Scholar
Kesper, Norival Google Scholar
Teixeira, Marta M. G. Google Scholar
Laurenti, Marcia Dalastra Google Scholar
Barbieri, C. L. Autor UNIFESP Google Scholar
Lindoso, Jose Angelo Google Scholar
Umezawa, Eufrosina S. Google Scholar
Institution Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Inst Infectol Emilio Ribas São Paulo
Abstract We investigated whether ELISA using crude antigens from insect and plant trypanosomatids, which are non-pathogenic and easily cultivated in large scale, has the same positivity data as Leishmania (Leishmania) chagasi, the etiological agent of human visceral leishmaniasis (VL) or canine leishmaniasis (CanL), or as Trypanosoma cruzi, the etiological agent of Chagas disease (CD). the antigens from Crithidia fasciculata, Crithidia luciliae, and Leptomonas seymouri showed 100% cross-reactivity with VL and CanL samples, with no statistically titers differences from L. (L.) chagasi, however, 34% (17/50) of VL samples revealed higher titers using the insect trypanosomatids than the homologous antigen. On the other hand, antigens from Strigomonas culicis, Angomonas deanei, and Phytomonas serpens showed low cross-reactivity with VL and CanL samples. the sera from patients with American tegumentary leishmaniasis showed low levels of cross-reactivity with all trypanosomatids investigated, even with L. (L) chagasi, without titers dissimilarity among them. These parasites were also worthless as antigen source for detection of CD cases, which required homologous antigens to reach 100% positivity. This study showed, by ELISA, that crude extract of Crithidia and Leptomonas have epitopes similar to L. (L.) chagasi, which supports the idea of using them as antigens source for the serodiagnosis of visceral leishmaniasis. Published by Elsevier B.V.
Keywords L. (L.) chagasi
Trypanosoma cruzi
Crithidia
Leptomonas
Trypanosomatids
Cross-reactivity
Language English
Sponsor LIM49-FMUSP
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Date 2014-03-01
Published in Acta Tropica. Amsterdam: Elsevier B.V., v. 131, p. 41-46, 2014.
ISSN 0001-706X (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 41-46
Origin http://dx.doi.org/10.1016/j.actatropica.2013.11.010
Access rights Closed access
Type Article
Web of Science ID WOS:000332905500007
URI http://repositorio.unifesp.br/handle/11600/37483

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