Boehringer Ingelheim International Gmbh

Jennifer Koenitzer

Markus Mueller

Jochen Schaub

Christian Bernloehr

The present invention relates to the identification of a genomic integration site for heterologous polynucleotides in Chinese Hamster Ovary (CHO) cells resulting in high RNA and/or protein production. More specifically it relates to CHO cells comprising at least one heterologous polynucleotide stably integrated into the S100A gene cluster of the CHO genome and to methods for the production of said CHO cells. Further, the invention relates to a method for the production of a protein of interest using said CHO cell and to the use of said CHO cell for producing a protein of interest at high yield. Integration within these specific target regions leads to reliable, stable and high yielding production of an RNA and/or protein of interest, encoded by the heterologous polynucleotide.

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Ingelheim am Rhein, Germany

Jennifer Koenitzer