Cell Culture and Sorting Loop for Industrial-Scale Clone Selection
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Solution Overview
Problem
Current methods for developing and optimizing cell culture processes for biopharmaceutical production are inefficient, as they do not adequately recreate the engineering environment of manufacturing-scale culture systems, leading to the selection of clones that perform poorly at industrial scales, which can result in unsatisfactory safety and efficacy profiles and increased development costs.
Innovation Solution
A system comprising a cell culturing device and a cell sorting device, with direct connections between them, is used to grow and select cells in conditions consistent with manufacturing-scale environments, enabling DNA integration and pre-selection of high-performing clones through recirculation and enrichment of desirable clones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cells are selected using conventional methods that do not recreate manufacturing-scale engineering environments, then the selection process is simpler and faster, but the selected clones perform poorly at industrial scales
Solution Approach 1:
The system divides the cell culture and selection process into separate functional modules: a cell culturing device for growing polyclonal cell populations under controlled manufacturing-scale conditions, and a cell sorting device for selecting high-performing clones based on product expression. This segmentation allows each component to be optimized independently while working together to solve the contradiction between reliability and complexity.
Solution Approach 2:
The system introduces an intermediary connection between the cell culturing device and cell sorting device, enabling direct transfer of cells between the two devices. This intermediary linkage ensures that cells are selected in the same engineering environment in which they will be manufactured, thereby improving clone performance reliability without requiring complete system replication.
2Reliability
If conventional cell selection methods are used, then development time and costs are reduced, but safety and efficacy profiles become unsatisfactory
Solution Approach 1:
The system performs preliminary selection of high-performing clones during the cell culture phase before final product formulation. By using flow cytometry to detect and sort cells with high product expression levels while they are still in culture, the system identifies promising clones early, reducing the time needed for subsequent screening and validation phases while ensuring safety and efficacy profiles.
Solution Approach 2:
The system implements feedback loops where cell culture conditions, product expression levels, and clone performance are continuously monitored and used to adjust selection criteria. This feedback mechanism ensures that only clones with satisfactory safety and efficacy profiles are selected for further development, while the iterative process efficiently narrows down candidates to reduce overall development time.
3Reliability
If cells are grown and selected in separate environments, then each process can be optimized independently, but the selected clones do not perform well at industrial scales
Solution Approach 1:
The system carefully controls and monitors critical parameters such as cell density, media composition, temperature, pH, and oxygen levels throughout the cell culture and selection process. By maintaining these parameters within specific ranges that mimic manufacturing-scale conditions, the system ensures clone performance consistency while still allowing independent optimization of each process step through parameter adjustment.
Data Source
AI summary
The invention relates to systems comprising at least a cell culturing device and a cell sorting device, and optionally a direct connection from the cell culturing device to the cell sorting device, and a direct connection from the cell sorting device to the cell culturing device. The invention further relates to methods for developing and/or optimizing a cell culture process, comprising at least the steps of growing a cell culture of a polyclonal population of cells in a cell culturing device and selecting cells in the cell sorting device, and optionally transferring cells from the cell culturing device into a cell sorting device by direct connection(s) from the cell culturing device to the cell sorting device, and recirculating selected cells from the cell sorting device back to the cell culturing device by direct connection(s) from the cell sorting device to the cell culturing device.