Trypanosoma cruzi I and Trypanosoma cruzi II: recognition of sugar structures by Arachis hypogaea (peanut agglutinin) lectin |
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Authors: | Araújo C A C Mello C B Jansen A M |
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Institution: | Department of Protozoology, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, Manguinhos, Brazil. |
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Abstract: | Epimastigote culture forms of different isolates of Trypanosoma cruzi from different mammal hosts, humans, and vectors were tested with FITC-conjugated peanut agglutinin lectin (PNA-FITC). The parasites maintained in axenic medium, liver infusion tryptose. were evaluated by flow cytometric analyses; whereas T. cruzi I (Tcl), which is associated with the sylvatic transmission cycle, was labeled in high percentages with PNA (88-99.2%), T. cruzi II (TcII) (parasites associated with domiciliar cycle) and T. cruzi, zymodeme 3 (Tc/Z3) (also associated with the sylvatic cycle) were labeled in low percentages (TcII, 0-26% and Tc/Z3, 0-12.6%). It was demonstrated that it is possible to differentiate the 2 main T. cruzi subpopulations, TcI and TcII, using Arachis hypogaea. These results also showed a higher variability in TcII in terms of PNA binding. |
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