EFEITOS DA ESTRATÉGIA DE INDUÇÃO NA PRODUÇÃO DE ANTÍGENO 503 DE Leishmania infatum chagasi EM E. coli RECOMBINANTE

O presente trabalho teve como objetivo estudar o efeito de duas estrategias de inducao (pulso e adicao gradual) com IPTG na expressao do antigeno 503 de Leishmania infatum chagasi em E. coli . No ensaio em batelada, o IPTG foi adicionado ao cultivo na concentracao final de 1 mM. Na batelada alimentada, 0,2 mM do indutor foi adicionado a cada hora, totalizando uma concentracao final de 0,8 mM. O procedimento de inducao por pulsos de IPTG indicou um incremento de aproximadamente 49% na producao de biomassa quando comparado em batelada. Pode-se concluir que a estrategia de inducao empregando pulsos de IPTG (batelada alimentada) foi mais eficaz na expressao do antigeno 503 quando comparado a estrategia de batelada simples. A eficacia da estrategia de inducao foi confirmada por eletreforese.

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