Study of kinetic parameters for the production of recombinant rabies virus glycoprotein

Author(s)

Mendonca, Ronaldo Z. ^[1] ; Greco, Katia N. ^[1] ; Moraes, Roberto H. P. ^[1] ; Astray, Renato M. ^[2] ; Barral, M. ^[3]

Affiliation

^[1] Inst Butantan, Lab Parasitol & Entomol, BR-05503900 Sao Paulo - Brazil

^[2] Inst Butantan, Lab Imunol Viral, BR-05503900 Sao Paulo - Brazil

^[3] Ctr Univ Fundacao Santo Andre, Dept Mat Engn, Santo Andre - Brazil

• Document type: Journal article
• Source: Cytotechnology; v. 60, n. 1-3, p. 143-151, JUL 2009.
• Web of Science Citations: 4

Abstract

Gene expression in insect cells is an advantageous system for recombinant protein production, mainly because of its capacity to produce complex proteins with correct post-translational modifications. Recently, we identified and purified a protein from Lonomia obliqua hemolymph able to increase the production of rabies virus glycoprotein, expressed in Drosophila melanogaster cells, by about 60%. In this work, the kinetic parameters for cell growth and recombinant rabies virus glycoprotein production were determined in cultures of transfected Drosophila melanogaster Schneider 2 (S2) cells expressing recombinant rabies virus glycoprotein (rRVGP), enriched and non-enriched with the hemolymph of Lonomia obliqua (Hb). The highest concentration of rRVGP was achieved at the beginning of the culture enriched with Hb, indicating that the cells produce greater amounts of rRVGP per cell (specific rRVGP concentration) at the early exponential growth phase. After day 8, a decrease in the concentration of rRVGP (ng/mL) was observed, probably due to protein decomposition. The average specific rRVGP production rate (mu(rRVGP)) was 30 ng rRVGP/10(7)cell.day, higher than that observed in the non-enriched culture. (AU)

• FAPESP's process: 02/09482-3 - Heterologus gene expression in dipteran cells: molecular biology and bioprocess engineering
• Grantee: Carlos Augusto Pereira
• Support Opportunities: Research Projects - Thematic Grants