These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


PUBMED FOR HANDHELDS

Search MEDLINE/PubMed


  • Title: Enhanced interferon-beta production by CHO cells through elevated osmolality and reduced culture temperature.
    Author: Han YK, Koo TY, Lee GM.
    Journal: Biotechnol Prog; 2009; 25(5):1440-7. PubMed ID: 19572287.
    Abstract:
    For efficient production of native interferon-beta (IFN-beta) in recombinant CHO cell culture, the IFN-beta molecular aggregation that occurs during culture needs to be minimized. To do so, we investigated the effect of hyperosmolality and hypothermia on IFN-beta production and molecular aggregation in rCHO cell culture. Both hyperosmolality (470 mOsm/kg) and hypothermia (32 degrees C) increased specific native INF-beta productivity q(IFN-beta). Furthermore, they decreased the IFN-beta molecular aggregation, although severe IFN-beta molecular aggregation could not be avoided in the later phase of culture. To overcome growth suppression at hyperosmolality and hypothermia, cells were cultivated in a biphasic mode. Cells were first cultivated at 310 mOsm/kg and 37 degrees C for 2 days to rapidly obtain a reasonably high cell concentration. The temperature and osmolality were then shifted to 32 degrees C and 470 mOsm/kg, respectively, to achieve high q(IFN-beta) and reduced IFN-beta molecular aggregation. Due to the enhanced q(IFN-beta) and delayed molecular aggregation, the highest native IFN-beta concentration achieved on day 6 was 18.03 +/- 0.61 mg/L, which was 5.30-fold higher than that in a control batch culture (310 mOsm/kg and 37 degrees C). Taken together, a combination of hyperosmolality and hypothermia in a biphasic culture is a useful strategy for improved native IFN-beta production from rCHO cells.
    [Abstract] [Full Text] [Related] [New Search]