Mechanisms driving the lactate switch in Chinese hamster ovary cells

Hartley F., Walker T., Chung V., Morten K.

AbstractThe metabolism of Chinese Hamster Ovary (CHO) cells in a production environment has been extensively investigated. However, a key metabolic transition, the switch from lactate production to lactate consumption, remains enigmatic. Though commonly observed in CHO cultures, the mechanism(s) by which this metabolic shift is triggered is unknown. Despite this, efforts to control the switch have emerged due to the association of lactate consumption with improved cell growth and productivity. This review aims to consolidate current theories surrounding the lactate switch. The influence of pH, NAD+/NADH, pyruvate availability and mitochondrial function on lactate consumption are explored. A hypothesis based on the cellular redox state is put forward to explain the onset of lactate consumption. Various techniques implemented to control the lactate switch, including manipulation of the culture environment, genetic engineering, and cell line selection are also discussed.

DOI

10.1002/bit.26603

Type

Journal article

Journal

Biotechnology and Bioengineering

Publisher

Wiley

Publication Date

08/2018

Volume

115

Pages

1890 - 1903

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