NDLI: Production of human serum albumin by sugar starvation induced promoter and rice cell culture

Content Provider	Springer Nature Link
Author	Huang, Li Fen Liu, Yu Kuo Lu, Chung An Hsieh, Shie Liang Yu, Su May
Copyright Year	2005
Abstract	Human serum albumin (HSA) is the most widely used clinical serum protein. Currently, commercial HSA can only be obtained from human plasma, due to lack of commercially feasible recombinant protein expression systems. In this study, inducible expression and secretion of HSA by transformed rice suspension cell culture was established. Mature form of HSA was expressed under the control of the sucrose starvation-inducible rice α Amy3 promoter, and secretion of HSA into the culture medium was achieved by using the α Amy3 signal sequence. High concentrations of HSA were secreted into culture medium in a short time (2–4 days) by sucrose depletion after cell concentrations had reached a peak density in culture medium containing sucrose. The recombinant HSA had the same electrophoretic mobility as commercial HSA and was stable and free from apparent proteolysis in the culture medium. In a flask scale culture with repeated sucrose provision-depletion cycles, HSA was stably produced with yields up to 11.5% of total medium proteins or 15 mg/L per cycle after each sucrose provision-depletion cycle. A bubble column type bioreactor was designed for production of HSA. In the bioreactor scale culture, HSA was produced with yields up to 76.4 mg/L 4 days after sucrose depletion. HSA was purified from the culture medium to high purity by a simple purification scheme. Enrichment of HSA in culture medium simplifies downstream purification, minimizes protease degradation, and may reduce production cost. The combination of a DNA construct containing the α Amy3 promoter and signal sequence, and the use of a rice suspension cell culture can provide an effective system for the production of recombinant pharmaceutical proteins.
Starting Page	569
Ending Page	581
Page Count	13
File Format	PDF
ISSN	09628819
Journal	Transgenic Research
Volume Number	14
Issue Number	5
e-ISSN	15739368
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2005-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	α-amylase promoter human serum albumin rice suspension cell protein secretion sucrose starvation Human Genetics Plant Sciences Plant Genetics & Genomics Animal Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Animal Science and Zoology Biotechnology Agronomy and Crop Science

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