Expression and purification of recombinant bone morphogenetic protein-2 in E.coli.
Di Yi Jun Yi Da Xue Xue Bao
; 22(5): 413-6, 2002 May.
Article
em En
| MEDLINE
| ID: mdl-12390700
ABSTRACT
OBJECTIVE:
To explore the method for producing human bone morphogenetic protein-2 (hBMP-2) by gene engineering techniques.METHODS:
E.coli BL21 was transformed with recombinant plasmid pYR (pBV220-hBMP-2) under different conditions, and SDS-PAGE analysis was conducted to observe the effects of the activation status and induction time of the bacterium on the target protein expression. The inclusion bodies obtained from E.coli were purified by anion exchange chromatography DEAE and molecular sieve S-300, and the recombinant protein was renatured by dialyse.RESULTS:
SDS-PAGE analysis showed a conspicuous band after induction signifying a new foreign protein with relative molecular mass of approximately 13 000. After activation of the bacteria when D600 was about 0.45, most efficient expression of rhBMP-2 was achieved which reached the peak 4 h after induction with heat. Implantation of the purified recombinant hBMP-2 resulted in proliferation of mesenchymal cells and new cartilage and bone formation, as shown by histological analysis 4 weeks after implantation.CONCLUSION:
hBMP-2 produced by gene engineering techniques possesses the biological capacity of ectopic bone formation.
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Base de dados:
MEDLINE
Assunto principal:
Fator de Crescimento Transformador beta
/
Proteínas Morfogenéticas Ósseas
/
Escherichia coli
Limite:
Animals
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Di Yi Jun Yi Da Xue Xue Bao
Assunto da revista:
MEDICINA
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
China