Bioreactor Amplification of Recombinant Cell Lines
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Solution Overview
Problem
Existing methods for amplifying recombinant cell lines to express polypeptides of interest are labor-intensive and time-consuming, often requiring several months and continuous monitoring to achieve desired amplification levels.
Innovation Solution
The use of a bioreactor for culturing host cells transfected with nucleic acid sequences encoding a polypeptide of interest and an amplifiable marker, with increasing concentrations of an amplification agent to rapidly amplify and express the polypeptide, reducing the time and labor required for cell line development.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional amplification methods using tissue culture flasks, shake flasks, or spinner flasks are used, then cell lines can be amplified, but the process requires several months and is labor-intensive due to continuous monitoring requirements
Solution Approach 1:
The invention changes the physical parameters of the culture system by transitioning from small-scale flask cultures to large-scale bioreactor cultures. This parameter change enables automated monitoring and control, reducing manual intervention while accelerating the amplification process from several months to a more efficient timeframe.
Solution Approach 2:
The invention replaces manual mechanical operations (continuous monitoring, sampling, and manipulation in flasks) with automated bioreactor systems that can monitor and control amplification processes automatically, thereby reducing labor intensity and time requirements.
2Ease of manufacture
If sequential step-wise increases in amplification agent concentration are applied in traditional flasks, then amplification can be achieved, but the process is labor-intensive requiring continuous evaluation over several months
Solution Approach 1:
The bioreactor system is designed to automatically monitor cell growth and amplification parameters, and can autonomously adjust amplification agent concentrations according to pre-programmed protocols. This self-service capability eliminates the need for continuous manual evaluation and adjustment, making the process easier to operate while maintaining amplification effectiveness.
Solution Approach 2:
The invention implements continuous automated monitoring and control of the amplification process in bioreactors, replacing the discontinuous manual sampling and evaluation required in traditional flask methods. This continuous action ensures optimal conditions are maintained throughout the amplification process without requiring intermittent human intervention.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces the time needed to produce amplified cell lines by up to 60%, making the process more efficient and less labor-intensive, while also preparing cells for subsequent bioreactor culturing by exposing them to shear stress conditions.
Implementation Method 1
preparing cells for subsequent bioreactor culturing by exposing them to shear stress conditions
Data Source
AI summary
Disclosed are methods relating to amplification and expression of a nucleic acid sequence encoding a polypeptide of interest in recombinant cells, and cell lines and polypeptides produced from such methods. The methods disclosed herein permit the amplification of cell lines that express a polypeptide of interest in a relatively short period of time through the use of a bioreactor.