[Production of the recombinant human bone morphogenetic protein-2 in Escherichia coli and testing of its biological activity in vitro and in vivo]

Mol Biol (Mosk). 2010 Nov-Dec;44(6):1036-44.
[Article in Russian]

Abstract

Bone morphogenetic protein-2 (rhBMP-2) represents the osteoinductive protein factor which plays a dominant role in growth and regeneration of a bone tissue. In clinical practice the bone grafting materials on the basis of rhBMP-2 are widely applied; the Russian analogues of similar materials are not produced. The fragment of the bmp2gene coding for a mature protein was cloned in Escherichia coli. The effective overproducing strain of rhBMP-2 was created on a basis of the E. coli BL21 (DE3). The rhBMP-2 production was about 25% of total cell protein. The biologically active dimeric form of rhBMP-2 was obtained by isolation and purification of protein from inclusion bodies with subsequent refolding. The rhBMP-2 sample with more than 80% of the dimeric form was obtained, which is able to interact with specific antibodies to BMP-2. Biological activity of the received rhBMP-2 samples was shown in the in vitro experiments by induction of alkaline phosphatase synthesis in C2C12 and C3H10T1/2 cell cultures. On model of the ectopic osteogenesis it was shown that received rhBMP-2 possesses biological activity in vivo, causing tissue calcification in the place of an injection. The protein activity in vivo depends on way of protein introduction and characteristics of protein sample: rhBMP-2 may be introduced in an acid or basic buffer solution, with or without the carrier. The offered method of rhBMP-2 isolation and purification results in increasing common protein yield as well as the maintenance of biologically active dimeric form in comparison with the analogues described in the literature.

MeSH terms

  • Amino Acid Sequence
  • Bone Morphogenetic Protein 2 / biosynthesis*
  • Bone Morphogenetic Protein 2 / genetics
  • Bone Morphogenetic Protein 2 / pharmacology*
  • Cloning, Molecular
  • Escherichia coli / genetics
  • Escherichia coli / growth & development
  • Escherichia coli / metabolism
  • Exons / genetics
  • Gene Expression
  • Humans
  • Introns / genetics
  • Molecular Sequence Data
  • Protein Refolding
  • Recombinant Proteins / biosynthesis*
  • Recombinant Proteins / genetics
  • Recombinant Proteins / pharmacology*

Substances

  • BMP2 protein, human
  • Bone Morphogenetic Protein 2
  • Recombinant Proteins