期刊
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
卷 82, 期 2, 页码 241-248出版社
SPRINGER
DOI: 10.1007/s00253-008-1769-7
关键词
Dictyostelium discoideum; Immobilization; Soluble human Fas ligand; Fibrous bed bioreactor
资金
- National Natural Science Foundation of China [20736008, 30370039, 20676115]
- National Basic Research Program of China [2007CB707805]
- Ministry of Science and Technology, China
The production of recombinant glycoproteins in Dictyostelium discoideum by conventional cell culture methods was limited by low cell density as well as low growth rate. In this work, cotton towel with a good adsorption capability for D. discoideum cells was used as the immobilization matrix in an external fibrous bed bioreactor (FBB) system. With batch cultures in the FBB, the concentration of immobilized cells in the cotton fiber carrier increased to 1.37 x 10(8) cells per milliliter after 110-h cultivation, which was about tenfold higher than the maximal cell density in the conventional free-cell culture. Correspondingly, a high concentration of soluble human Fas ligand (hFasL; 173.7 mu g l(-1)) was achieved with a high productivity (23 mu g l(-1) h(-1)). The FBB system also maintained a high density of viable cells for hFasL production during repeated-batch cultures, achieving a productivity of 910 mu g l(-1) h(-1) in all three batches studied during 15 days. The repeated-batch culture using immobilized cells of D. discoideum in the FBB system thus provides a good method for long-term and high-level production of hFasL.
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