Novel Cell-Ess® supplement used as a feed or as an initial boost to CHO serum free media results in a significant increase in protein yield and production

Many metrics, including metabolic profiles, have been used to analyze cell health and optimize productivity. In this study, we investigated the ability of a lipid supplement to increase protein yield. At a concentration of 1% (v/v) the lipid supplement caused a significant increase in protein titer (1118 +/- 65.4 ng 10(5) cells(-1) days(-1)) when compared to cultures grown in the absence of supplementation (819.3 +/- 38.1 ng 10(5) cells(-1) days(-1); p < 0.05). This equated to a 37% increase in productivity. Furthermore, metabolic profiles of ammonia, glutamate, lactate, and glucose were not significantly altered by the polar lipid supplement. In a separate set of experiments, using the supplement as a feed resulted in 2 notable effects. The first was a 25% increase in protein titer. The second was an extension of peak protein production from 1 day to 2 days. These results suggest that lipid supplementation is a promising avenue for enhancing protein production. In addition, our results also suggest that an increase in protein production may not necessarily require a change in the metabolic state of the cells. (C) 2016 The Author. Published by Elsevier B.V. on behalf of Research Network of Computational and Structural Biotechnology.