info:eu-repo/semantics/article
Immune complexes in chronic Chagas disease patients are formed by exovesicles from Trypanosoma cruzi carrying the conserved MASP N-terminal region
Fecha
2017-03Registro en:
Díaz Lozano, Isabel María; De Pablos, Luis Miguel; Longhi, Silvia Andrea; Zago, María Paola; Schijman, Alejandro Gabriel; et al.; Immune complexes in chronic Chagas disease patients are formed by exovesicles from Trypanosoma cruzi carrying the conserved MASP N-terminal region; Nature Publishing Group; Scientific Reports; 7; 3-2017
2045-2322
CONICET Digital
CONICET
Autor
Díaz Lozano, Isabel María
De Pablos, Luis Miguel
Longhi, Silvia Andrea
Zago, María Paola
Schijman, Alejandro Gabriel
Osuna, Antonio
Resumen
The exovesicles (EVs) are involved in pathologic host-parasite immune associations and have been recently used as biomarkers for diagnosis of infectious diseases. The release of EVs by Trypanosoma cruzi, the causative agent of Chagas disease, has recently been described, with different protein cargoes including the MASP multigene family of proteins MASPs are specific to this parasite and characterized by a conserved C-terminal (C-term) region and an N-terminal codifying for a signal peptide (SP). In this investigation, we identified immature MASP proteins containing the MASP SP in EVs secreted by the infective forms of the parasite. Those EVs are responsible for the formation of immune complexes (ICs) containing anti-MASP SP IgGs in patients with different (cardiac, digestive and asymptomatic) chronic Chagas disease manifestations. Moreover, purified EVs as well as the MASP SP inhibit the action of the complement system and also show a significant association with the humoral response in patients with digestive pathologies. These findings reveal a new route for the secretion of MASP proteins in T. cruzi, which uses EVs as vehicles for immature and misfolded proteins, forming circulating immune complexes. Such complexes could be used in the prognosis of digestive pathologies of clinical forms of Chagas disease.