Infection by Trypanosoma cruzi metacyclic forms deficient in gp82 but expressing a related surface molecule, gp30
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNIFESP |
Texto Completo: | http://repositorio.unifesp.br/handle/11600/27456 http://dx.doi.org/10.1128/IAI.71.11.6184-6191.2003 |
Resumo: | Trypanosoma cruzi metacyclic trypomastigotes invade and replicate in the gastric mucosal epithelium after oral infection. in this study we analyzed the process of infection by T. cruzi isolates deficient in the expression of gp82, the metacyclic stage-specific surface glycoprotein implicated in target cell entry in vitro and in promoting mucosal infection in mice after oral challenge. Mice infected by the oral route with metacyclic forms of gp82-deficient isolate 569 or 588 developed patent parasitemia but at greatly reduced levels compared to those infected with the gp82-expressing isolate CL. Metacyclic forms of both isolates expressed gp30, a surface glycoprotein detectable by monoclonal antibody (MAb) 3F6 directed to gp82. Otherwise, the gp82-deficient isolates displayed a surface profile similar to that of the CL isolate and also entered epithelial HeLa cells in a manner inhibitable by MAb 3F6 and dependent on the parasite signal transduction that involved the activation of protein tyrosine kinase and Ca2+ mobilization from thapsigargin-sensitive stores. Like gp82, gp30 triggered the host cell Ca2+ response required for parasite internalization. Purified gp30 and the recombinant gp82 inhibited HeLa cell invasion of metacyclic forms of isolates 569 and 588 by similar to90 and similar to70%, respectively. A cell invasion assay performed in the presence of gastric mucin, mimicking the in vivo infection, showed an inhibition of 70 to 75% in the internalization of gp82-deficient isolates but not of the CL isolate. the recombinant gp82 exhibited an adhesive capacity toward gastric mucin much higher than that of gp30. Taken together, our findings indicate that target cell entry of metacyclic trypomastigotes can be mediated either by gp82 or gp30 but that efficient mucosal infection depends on the expression of gp82. |
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Cortez, Mauro [UNIFESP]Neira, Ivan [UNIFESP]Ferreira, Daniele [UNIFESP]Luquetti, Alejandro O.Rassi, AnisAtayde, Vanessa [UNIFESP]Yoshida, Nobuko [UNIFESP]Universidade Federal de São Paulo (UNIFESP)Universidade Federal de Goiás (UFG)2016-01-24T12:34:06Z2016-01-24T12:34:06Z2003-11-01Infection and Immunity. Washington: Amer Soc Microbiology, v. 71, n. 11, p. 6184-6191, 2003.0019-9567http://repositorio.unifesp.br/handle/11600/27456http://dx.doi.org/10.1128/IAI.71.11.6184-6191.2003WOS000186194300011.pdf10.1128/IAI.71.11.6184-6191.2003WOS:000186194300011Trypanosoma cruzi metacyclic trypomastigotes invade and replicate in the gastric mucosal epithelium after oral infection. in this study we analyzed the process of infection by T. cruzi isolates deficient in the expression of gp82, the metacyclic stage-specific surface glycoprotein implicated in target cell entry in vitro and in promoting mucosal infection in mice after oral challenge. Mice infected by the oral route with metacyclic forms of gp82-deficient isolate 569 or 588 developed patent parasitemia but at greatly reduced levels compared to those infected with the gp82-expressing isolate CL. Metacyclic forms of both isolates expressed gp30, a surface glycoprotein detectable by monoclonal antibody (MAb) 3F6 directed to gp82. Otherwise, the gp82-deficient isolates displayed a surface profile similar to that of the CL isolate and also entered epithelial HeLa cells in a manner inhibitable by MAb 3F6 and dependent on the parasite signal transduction that involved the activation of protein tyrosine kinase and Ca2+ mobilization from thapsigargin-sensitive stores. Like gp82, gp30 triggered the host cell Ca2+ response required for parasite internalization. Purified gp30 and the recombinant gp82 inhibited HeLa cell invasion of metacyclic forms of isolates 569 and 588 by similar to90 and similar to70%, respectively. A cell invasion assay performed in the presence of gastric mucin, mimicking the in vivo infection, showed an inhibition of 70 to 75% in the internalization of gp82-deficient isolates but not of the CL isolate. the recombinant gp82 exhibited an adhesive capacity toward gastric mucin much higher than that of gp30. Taken together, our findings indicate that target cell entry of metacyclic trypomastigotes can be mediated either by gp82 or gp30 but that efficient mucosal infection depends on the expression of gp82.Universidade Federal de São Paulo, Escola Paulista Med, Dept Microbiol Immunol & Parasitol, BR-04023062 São Paulo, BrazilUniv Fed Goias, Lab Doenca Chagas, Hosp Clin, Fac Med, Goiania, Go, BrazilUniversidade Federal de São Paulo, Escola Paulista Med, Dept Microbiol Immunol & Parasitol, BR-04023062 São Paulo, BrazilWeb of Science6184-6191engAmer Soc MicrobiologyInfection and ImmunityInfection by Trypanosoma cruzi metacyclic forms deficient in gp82 but expressing a related surface molecule, gp30info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESPORIGINALWOS000186194300011.pdfapplication/pdf1145502${dspace.ui.url}/bitstream/11600/27456/1/WOS000186194300011.pdf9112e604a677a15a9a440d279d6c0cd6MD51open accessTEXTWOS000186194300011.pdf.txtWOS000186194300011.pdf.txtExtracted texttext/plain37513${dspace.ui.url}/bitstream/11600/27456/2/WOS000186194300011.pdf.txt854762cc92a57394d725b53cc89cab8fMD52open access11600/274562023-01-12 21:52:29.297open accessoai:repositorio.unifesp.br:11600/27456Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestopendoar:34652023-01-13T00:52:29Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false |
dc.title.en.fl_str_mv |
Infection by Trypanosoma cruzi metacyclic forms deficient in gp82 but expressing a related surface molecule, gp30 |
title |
Infection by Trypanosoma cruzi metacyclic forms deficient in gp82 but expressing a related surface molecule, gp30 |
spellingShingle |
Infection by Trypanosoma cruzi metacyclic forms deficient in gp82 but expressing a related surface molecule, gp30 Cortez, Mauro [UNIFESP] |
title_short |
Infection by Trypanosoma cruzi metacyclic forms deficient in gp82 but expressing a related surface molecule, gp30 |
title_full |
Infection by Trypanosoma cruzi metacyclic forms deficient in gp82 but expressing a related surface molecule, gp30 |
title_fullStr |
Infection by Trypanosoma cruzi metacyclic forms deficient in gp82 but expressing a related surface molecule, gp30 |
title_full_unstemmed |
Infection by Trypanosoma cruzi metacyclic forms deficient in gp82 but expressing a related surface molecule, gp30 |
title_sort |
Infection by Trypanosoma cruzi metacyclic forms deficient in gp82 but expressing a related surface molecule, gp30 |
author |
Cortez, Mauro [UNIFESP] |
author_facet |
Cortez, Mauro [UNIFESP] Neira, Ivan [UNIFESP] Ferreira, Daniele [UNIFESP] Luquetti, Alejandro O. Rassi, Anis Atayde, Vanessa [UNIFESP] Yoshida, Nobuko [UNIFESP] |
author_role |
author |
author2 |
Neira, Ivan [UNIFESP] Ferreira, Daniele [UNIFESP] Luquetti, Alejandro O. Rassi, Anis Atayde, Vanessa [UNIFESP] Yoshida, Nobuko [UNIFESP] |
author2_role |
author author author author author author |
dc.contributor.institution.none.fl_str_mv |
Universidade Federal de São Paulo (UNIFESP) Universidade Federal de Goiás (UFG) |
dc.contributor.author.fl_str_mv |
Cortez, Mauro [UNIFESP] Neira, Ivan [UNIFESP] Ferreira, Daniele [UNIFESP] Luquetti, Alejandro O. Rassi, Anis Atayde, Vanessa [UNIFESP] Yoshida, Nobuko [UNIFESP] |
description |
Trypanosoma cruzi metacyclic trypomastigotes invade and replicate in the gastric mucosal epithelium after oral infection. in this study we analyzed the process of infection by T. cruzi isolates deficient in the expression of gp82, the metacyclic stage-specific surface glycoprotein implicated in target cell entry in vitro and in promoting mucosal infection in mice after oral challenge. Mice infected by the oral route with metacyclic forms of gp82-deficient isolate 569 or 588 developed patent parasitemia but at greatly reduced levels compared to those infected with the gp82-expressing isolate CL. Metacyclic forms of both isolates expressed gp30, a surface glycoprotein detectable by monoclonal antibody (MAb) 3F6 directed to gp82. Otherwise, the gp82-deficient isolates displayed a surface profile similar to that of the CL isolate and also entered epithelial HeLa cells in a manner inhibitable by MAb 3F6 and dependent on the parasite signal transduction that involved the activation of protein tyrosine kinase and Ca2+ mobilization from thapsigargin-sensitive stores. Like gp82, gp30 triggered the host cell Ca2+ response required for parasite internalization. Purified gp30 and the recombinant gp82 inhibited HeLa cell invasion of metacyclic forms of isolates 569 and 588 by similar to90 and similar to70%, respectively. A cell invasion assay performed in the presence of gastric mucin, mimicking the in vivo infection, showed an inhibition of 70 to 75% in the internalization of gp82-deficient isolates but not of the CL isolate. the recombinant gp82 exhibited an adhesive capacity toward gastric mucin much higher than that of gp30. Taken together, our findings indicate that target cell entry of metacyclic trypomastigotes can be mediated either by gp82 or gp30 but that efficient mucosal infection depends on the expression of gp82. |
publishDate |
2003 |
dc.date.issued.fl_str_mv |
2003-11-01 |
dc.date.accessioned.fl_str_mv |
2016-01-24T12:34:06Z |
dc.date.available.fl_str_mv |
2016-01-24T12:34:06Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
Infection and Immunity. Washington: Amer Soc Microbiology, v. 71, n. 11, p. 6184-6191, 2003. |
dc.identifier.uri.fl_str_mv |
http://repositorio.unifesp.br/handle/11600/27456 http://dx.doi.org/10.1128/IAI.71.11.6184-6191.2003 |
dc.identifier.issn.none.fl_str_mv |
0019-9567 |
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WOS000186194300011.pdf |
dc.identifier.doi.none.fl_str_mv |
10.1128/IAI.71.11.6184-6191.2003 |
dc.identifier.wos.none.fl_str_mv |
WOS:000186194300011 |
identifier_str_mv |
Infection and Immunity. Washington: Amer Soc Microbiology, v. 71, n. 11, p. 6184-6191, 2003. 0019-9567 WOS000186194300011.pdf 10.1128/IAI.71.11.6184-6191.2003 WOS:000186194300011 |
url |
http://repositorio.unifesp.br/handle/11600/27456 http://dx.doi.org/10.1128/IAI.71.11.6184-6191.2003 |
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Amer Soc Microbiology |
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Amer Soc Microbiology |
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