Fator de Inibição da Migração de Macrófagos (MIF) aumenta a migração e a susceptibilidade de células trofoblasticas extravilosas (HTR8/SVneo) à infecção por Toxoplasma gondii

Abstract

The successful of pregnancy depend about production of many cytokine by extravillous trophoblastic cells migration and the macrophage migration inhibitory (MIF) is important in this process. MIF is a potent cytokine, implicated in several pathological conditions and it is involved in pathogenesis of infections, including toxoplasmosis. Therefore, we investigated the role of MIF in infected HTR8/SVneo cells. The cells were infected with RH strain (2F1) tachyzoites of T. gondii and treated with recombinant MIF (rhMIF) or MIF inhibitor (ISO-1). The cell viability was analyzed by MTT assay, T. gondii intracellular proliferation by colorimetric beta-galactosidase assay, CD44 expression and ERK1/2 phosphorylation by Western blotting and cell migration by scratch assay. The supernatants were collected for MIF production analysis by ELISA. The cells were used to CD44 co-receptor and ERK1/2 phosphorylation analysis. Cellular viability was not changed in infected and/or treated with rhMIF or ISO-1. Cells treated with rhMIF showed high parasite burden, presence of ERK1/2 phosphorylation. In addition, the infection increased extracellular MIF production by HTR8/SVneo cells. In cellular migration assay, ISO-1 treated cells decrease migration compared with rhMIF treated cells. In conclusion, T. gondii infection caused modulation of MIF production and ERK1/2 phosphorylation. Furthermore, MIF was important in the migration of HTR8/SVneo cells, ensuring its permanence in the host cell.