Abstract
Infection of human fibroblasts with tachyzoites of RH and Prugniaud strains, two different strains of Toxoplasma gondii, significantly increased monocyte chemotactic protein (MCP)-1 secretion contrary to what happened with bradyzoites of the cystogenetic strain. Quantification of MCP-1 mRNA by RT-PCR showed that this phenomenon is regulated at the transcriptional level. Thus, the stage of parasite can be deciding in MCP-1 induction since only tachyzoites induced MCP-1 expression and secretion. MCP-1 induced by tachyzoites could be involved in cell recruitment, as shown by the quantification of MCP1 ARNm by real-time PCR (LightCycler, Roche Diagnostics), in the pathogenesis of T. gondii infection.
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