Correlation of meta 1 expression with culture stage, cell morphology and infectivity in Leishmania (Leishmania) amazonensis promastigotes |
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Authors: | Santos Marcos Gonzaga dos Silva Maria Fernanda Laranjeira da Zampieri Ricardo Andrade Lafraia Rafaella Marino Floeter-Winter Lucile Maria |
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Institution: | Departamento de Fisiologia, Instituto de Biociências, Universidade de S?o Paulo, S?o Paulo, SP, Brasil. marsant2@yahoo.com |
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Abstract: | The parasitic protozoan Leishmania (Leishmania) amazonensis alternates between mammalian and insect hosts. In the insect host, the parasites proliferate as procyclic promastigotes and then differentiate into metacyclic infective forms. The meta 1 gene is preferentially expressed during metacyclogenesis. Meta 1 expression profile determination along parasite growth curves revealed that the meta 1 mRNA level peaked at the early stationary phase then decreased to an intermediate level. No correlation was observed between meta 1 expression and infectivity. Conversely, infectivity correlated with the increase of apoptotic cells in the late stationary phase. |
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