Macharoen_2021_Biotechnol.Bioeng_118_1431

Reference

Title : Production of recombinant butyrylcholinesterase from transgenic rice cell suspension cultures in a pilot-scale bioreactor - Macharoen_2021_Biotechnol.Bioeng_118_1431
Author(s) : Macharoen K , Du M , Jung S , McDonald KA , Nandi S
Ref : Biotechnol Bioeng , 118 :1431 , 2021
Abstract :

Producing recombinant proteins in transgenic plant cell suspension cultures in bioreactors provides controllability, reproducibility, scalability, and low-cost production, although low yields remain the major challenge. The studies on scaling-up to pilot-scale bioreactors, especially in conventional stainless-steel stirred tank bioreactors (STB), to produce recombinant proteins in plant cell suspension cultures are very limited. In this study, we scaled-up the production of rice recombinant butyrylcholinesterase (rrBChE), a complex hydrolase enzyme that can be used to prophylactically and therapeutically treat against organophosphorus nerve agents and pesticide exposure, from metabolically regulated transgenic rice cell suspension cultures in a 40-L pilot-scale STB. Employing cyclical operation together with a simplified-process operation (controlling gas sparging rate rather than dissolved oxygen and allowing natural sugar depletion) identified in lab-scale (5L) bioreactor studies, we found a consistent maximum total active rrBChE production level of 46-58microg/g fresh weight in four cycles over 82 days of semicontinuous operation. Additionally, maintaining the overall volumetric oxygen mass transfer coefficient (k(L) a) in the pilot-scale STB to be equivalent to the lab-scale STB improves the maximum total active rrBChE production level and the maximum volumetric productivity to 85microg/g fresh weight and 387microgL(-1) day(-1) , respectively, which are comparable to the lab-scale culture. Here, we demonstrate pilot-scale bioreactor performance using a metabolically regulated transgenic rice cell culture for long-term, reproducible, and sustained production of rrBChE.

PubMedSearch : Macharoen_2021_Biotechnol.Bioeng_118_1431
PubMedID: 33241854

Related information

Citations formats

Macharoen K, Du M, Jung S, McDonald KA, Nandi S (2021)
Production of recombinant butyrylcholinesterase from transgenic rice cell suspension cultures in a pilot-scale bioreactor
Biotechnol Bioeng 118 :1431

Macharoen K, Du M, Jung S, McDonald KA, Nandi S (2021)
Biotechnol Bioeng 118 :1431