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Combined TGE-SGE expression of novel PAI-1-resistant t-PA in CHO DG44 cells using orbitally shaking disposable bioreactors.

Abstract : An important modification of thrombolytic agents is resistance to plasminogen activator inhibitor-1 (PAI-1). In previous studies, a new truncated PAI-1-resistant variant was developed based on deletion of the first three domains in t-PA and the substitution of KHRR 128-131 amino acids with AAAA in the truncated t-PA. The novel variant expressed in a static culture system of Chinese Hamster Ovary (CHO) DG44 cells exhibited a higher resistance to PAI-1 when compared with the full-length commercial drug; Actylase. In the present study, the truncatedmutant protein was expressed in CHO DG44 cells in 50 ml orbital shaking bioreactors. The final yield of the truncatedmutant in the culture was 752 IU/ml, representing a 63% increase compared with the static culture system. Therefore, these results suggest that using the combined features of a transient and stable expression system is feasible for the production of novel recombinant proteins in the quantities needed for preclinical studies.
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Contributor : Fatemeh Davami <>
Submitted on : Monday, November 19, 2012 - 1:00:45 PM
Last modification on : Wednesday, September 23, 2020 - 10:48:02 AM
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Fatemeh Davami, Farzaneh Barkhordari, Mahmoud Alebouyeh, Ahmad Adeli, Fereidoun Mahboudi. Combined TGE-SGE expression of novel PAI-1-resistant t-PA in CHO DG44 cells using orbitally shaking disposable bioreactors.. Journal of microbiology and biotechnology, The Korean Society for Microbiology and Biotechnology, 2011, 21 (12), pp.1299-305. ⟨10.4014/jmb.1106.05060⟩. ⟨pasteur-00753540⟩

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