Premium
Deletion of a telomeric region on chromosome 8 correlates with higher productivity and stability of CHO cell lines
Author(s) -
Ritter Anett,
Voedisch Bernd,
Wienberg Johannes,
Wilms Burkhard,
Geisse Sabine,
Jostock Thomas,
Laux Holger
Publication year - 2016
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.25876
Subject(s) - chinese hamster ovary cell , clone (java method) , biology , cell culture , gene , cell , cloning (programming) , genetics , cell sorting , selection (genetic algorithm) , chromosome , microbiology and biotechnology , computational biology , computer science , artificial intelligence , programming language
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, for example, 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 to determine for example, quality. 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. Biotechnol. Bioeng. 2016;113: 1084–1093. © 2015 Wiley Periodicals, Inc.