Overcoming inefficient secretion of recombinant VEGF-C in baculovirus expression vector system by simple purification of the protein from cell lysate

Protein Expression and Purification
Tomasz KlausJoanna Bereta

Abstract

The first reports about successfully expressed recombinant proteins with the use of a baculovirus vector were published over 30years ago. Despite the long time of refining this expression system, early problems with the production of baculovirus-derived secretory proteins are still not satisfactorily solved. The high expression level driven by baculoviral promoters often does not result in the desired yield of secreted recombinant proteins, which frequently accumulate inside insect cells and are only partially processed. During our attempts to produce vascular endothelial growth factor C (VEGF-C) with the use of a baculovirus vector we also faced an inefficient secretion of the recombinant protein to culture medium. We were not able to improve the outcome and obtain an acceptable concentration of VEGF-C in the medium by changing the culture conditions or utilizing different signal peptides. However, as a significant amount of native VEGF-C was detected inside the baculovirus-infected cells, we developed a simple method to purify recombinant, glycosylated VEGF-C from a lysate of the cells. The presented results indicate that the lack of a secretory protein in the insect cell culture medium after baculovirus infection does not ne...Continue Reading

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Citations

Feb 24, 2016·Journal of Drug Delivery·Roche C de Guzman, Sina Y Rabbany
Oct 28, 2019·3 Biotech·Alexandra Marisa TargovnikMaría Victoria Miranda

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