Method for the production of proteins by means of inducible expression systems in genetically modified eukaryotic host-cells multiplicated in-vivo

Abstract From the Canadian patent

In the production of proteins of biological interest by means of a stress inducible gene expression unit/eukaryotic host cell system, the transformed cell lines are multiplicated by tumour growing in immunodefficient warm-blooded animals after which the multiplicated cells are cultured in vitro and subjected to stress, whereby expression occurs in high yield. In vivo multiplication rates of 105-106 the innoculated quantity/2 weeks are reported without any loss of the latent inducible expression capacity.