Development of the recombinant SAG1 antigen of Toxoplasma gondii by high-density fermentation and identification of its immunoreactivity / 南方医科大学学报
Journal of Southern Medical University
;
(12): 1180-1183, 2008.
Artículo
en Chino
| WPRIM
| ID: wpr-270181
ABSTRACT
<p><b>OBJECTIVE</b>To develop a technology for production of recombinant SAG1 of Toxoplasma gondii (T.g) in batches.</p><p><b>METHODS</b>The rSAG1 of T.g was expressed in E.coli by high-density fermentation and purified by Sephadex G-75 column chromatography after Ni-NTA agarose at native condition. The activity of rSAG1 and its efficacy in T.g diagnosis were identified by Western blotting and ELISA, respectively.</p><p><b>RESULTS</b>The optical density (OD) of the bacteria reached 20.21 after induction, and 300 g bacteria were harvested from 11.5 L broth. The rSAG1 was highly expressed in E.coli as a fusion protein, accounting for about 25.82% of the total bacterial protein. The purity of rSAG1 reached 98.54% after purification by Ni-NTA combined with Sephadex G-75 column chromatography. Western blotting revealed a distinct band reacting with the sera of rabbits vaccinated by T.g. Twenty-four of the 25 sera of mice infected with T.g and 36 of the 38 sera of human subjects with IgG antibody against T.g were detected by rSAG1-ELISA.</p><p><b>CONCLUSION</b>A large-scale production of immunoreactive SAG1 of T.g is developed by high-density fermentation and purification with Ni-NTA combined with Sephadex G-75 column chromatography.</p>
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Toxoplasma
/
Proteínas Recombinantes de Fusión
/
Ensayo de Inmunoadsorción Enzimática
/
Proteínas Protozoarias
/
Western Blotting
/
Alergia e Inmunología
/
Escherichia coli
/
Fermentación
/
Genética
/
Metabolismo
Tipo de estudio:
Estudio diagnóstico
Límite:
Animales
Idioma:
Chino
Revista:
Journal of Southern Medical University
Año:
2008
Tipo del documento:
Artículo
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