Resumen

ANGEL B, Rafael-Oswaldo; CHINCHILLA C, Misael; GUERRERO B, Olga Marta  y  CASTRO C, Alfredo. Cinética de crecimiento in vitro de dos cepas de Trypanosoma cruzi (Kinetoplastida: Trypanosomatidae) en células miocárdicas de roedores con diferente susceptibilidad. Rev. biol. trop [online]. 2007, vol.55, n.1, pp.121-126. ISSN 0034-7744.

In vitro growth kinetics of two Trypanosoma cruzi (Kinetoplastida: Trypanosomatidae) clones in myocardial cells from rodents of different susceptibility. Two Trypanosoma cruzi isolates, TCR-4 from Costa Rica and UES-1 from El Salvador, were studied in vitro to compare their infectivity or resistance and intracellular replication in myocardial cells in three strains of mice and rats: NGP white mice, C₃ H mice and Sprague Dowley rats. Myocardial cells were cultured on coverslips at 37 º C in a humid 10 % CO₂ atmosphere and then infected at a ratio of one tripomastigote per cell. Samples were studied after 24, 72, 96 and 120 h of infection to determine parasite infection capacity and intracellular multiplication. Both parasites had the highest infection capacity in C₃ H mice, followed by NGP mice cells with a very low infection rate. Lastly, almost no Trypanosoma cruzi multiplication was observed in Sprague Dowley rats, suggesting a strong natural resistance in this animal to both strains of the parasite. The UES-1 isolate presented higher multiplication and greater invasion than the TCR-4 strain, showing greater virulence of UES-1 in heart cells, at least in vitro. Rev. Biol. Trop. 55 (1): 121-126. Epub 2007 March. 31.

Palabras clave : Trypanosomatidae; Trypanosoma cruzi; heart cells; cell culture.

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