Expression, production, and renaturation of a functional single-chain variable antibody fragment (scFv) against human ICAM-1
Braz. j. med. biol. res
;
47(7): 540-547, 07/2014. tab, graf
Artículo
en Inglés
| LILACS
| ID: lil-712968
ABSTRACT
Intercellular adhesion molecule-1 (ICAM-1) is an important factor in the progression of inflammatory responses in vivo. To develop a new anti-inflammatory drug to block the biological activity of ICAM-1, we produced a monoclonal antibody (Ka=4.19×10−8 M) against human ICAM-1. The anti-ICAM-1 single-chain variable antibody fragment (scFv) was expressed at a high level as inclusion bodies in Escherichia coli. We refolded the scFv (Ka=2.35×10−7 M) by ion-exchange chromatography, dialysis, and dilution. The results showed that column chromatography refolding by high-performance Q Sepharose had remarkable advantages over conventional dilution and dialysis methods. Furthermore, the anti-ICAM-1 scFv yield of about 60 mg/L was higher with this method. The purity of the final product was greater than 90%, as shown by denaturing gel electrophoresis. Enzyme-linked immunosorbent assay, cell culture, and animal experiments were used to assess the immunological properties and biological activities of the renatured scFv.
Texto completo:
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Índice:
LILACS (Américas)
Asunto principal:
Fragmentos de Inmunoglobulinas
/
Expresión Génica
/
Molécula 1 de Adhesión Intercelular
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Renaturación de Proteína
/
Anticuerpos de Cadena Única
/
Replegamiento Proteico
Límite:
Animales
/
Femenino
/
Humanos
/
Masculino
Idioma:
Inglés
Revista:
Braz. j. med. biol. res
Asunto de la revista:
Biologia
/
Medicina
Año:
2014
Tipo del documento:
Artículo
/
Documento de proyecto
País de afiliación:
China
Institución/País de afiliación:
Academy of Military Medical Sciences/CN
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