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Cloning, sequencing and expression of the ovine interleukin 6 gene.

Gene amplification by reverse transcriptase PCR with heterologous primers has been used to obtain a cDNA clone encoding the structural sequences of ovine interleukin 6 from alveolar macrophages. This cDNA encodes a protein of M(r) = 23,429, which is 53% homologous in amino acid sequence to human IL = 6. The clone hybridizes to an RNA of size 1260 nt in alveolar macrophages, expression of which is potentiated by LPS. The ovine IL-6 structural gene has been cloned into the yeast expression vector pOGS40, and used to produce a recombinant protein. This protein is capable of causing increased immunoglobulin production in pokeweed mitogen stimulated ovine peripheral blood mononuclear cells at concentrations of 10-100 ng/ml, but it only causes very limited replication of B9 cells, a murine IL-6 dependent cell line. This is in contrast to recombinant human IL-6, which is capable of stimulating B9 cell proliferation, but not immunoglobulin production by ovine PBMC.[1]

References

  1. Cloning, sequencing and expression of the ovine interleukin 6 gene. Ebrahimi, B., Roy, D.J., Bird, P., Sargan, D.R. Cytokine (1995) [Pubmed]
 
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