Ritter, Anett, Voedisch, Bernd, Wienberg, Johannes, Wilms, Burkhard, Geisse, Sabine, Jostock, Thomas and Laux, Holger (2015) Deletion of a telomeric region on chromosome 8 leads to higher productivity and stability of CHO cell lines. Biotechnology and Bioengineering (John Wiley and Sons).

Abstract

Chinese Hamster Ovary (CHO) cells are widely used for large scale production of recombinant biopharmaceuticals. Although these cells have been extensively used, a demand to further increase the performance i.e. to facilitate the process of clone selection to isolate the highest producing cell lines that maintain stability of production over time is still existing.
We compared gene expression profiles of high versus low producing CHO clones to identify regulated genes which can be used as biomarkers during clone selection or for cell line engineering. We present evidence that increased production rates and cell line stability are correlated with the loss of the telomeric region of the chromosome 8. A new parental CHO cell line lacking this region was generated and its capability for protein production was assessed. The average volumetric productivity of cells after gene transfer and selection was found to be several fold improved, facilitating the supply of early drug substance material for e.g. quality determination. In addition, significantly more cell clones with a higher average productivity and higher protein production stability were obtained with the new host cell line after single cell cloning. This allows reduced efforts in single cell sorting, screening of fewer clones and raises the opportunity to circumvent time and labor-intensive stability studies.

Item Type:	Article
Date Deposited:	17 Nov 2015 00:45
Last Modified:	17 Nov 2015 00:45
URI:	https://oak.novartis.com/id/eprint/26032