Single-Cell Micro-Well Culture for Recombinant Protein Screening
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Solution Overview
Problem
Existing methods for culturing cells to produce recombinant proteins, such as antibodies, are inefficient in screening for high-producing cell strains, particularly when cells are cultured in general-purpose wells and evaluated for fluorescence.
Innovation Solution
A method involving the use of a culture plate with partitioned storage sections of minute sizes, where single cells are gelatinized in the culture medium, followed by the addition of a detection protein to evaluate recombinant protein production, and the use of a suction mechanism to transfer high-producing cells to a secondary plate for further culture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cells are cultured in general-purpose wells and evaluated for fluorescence, then the screening process can be performed, but the screening efficiency is low and it is difficult to efficiently identify high-producing cell strains
Solution Approach 1:
The culture plate is divided into multiple minute storage sections (micro-wells), with each section capable of independently culturing single cells. This segmentation enables parallel screening of numerous cell clones simultaneously, dramatically improving screening efficiency compared to conventional general-purpose wells
Solution Approach 2:
The invention employs a hierarchical structure where minute storage sections are nested within larger plate structures. Each micro-well contains a gelatinized culture medium with embedded single cells, creating a nested configuration that maximizes screening capacity within a compact format
2Reliability
If single cells are cultured in minute storage sections with gelatinized culture medium, then the culture environment is optimized for single-cell isolation and recombinant protein production, but the device structure becomes more complex
Solution Approach 1:
Each minute storage section is designed with specific local characteristics: gelatinized culture medium for single-cell embedding, controlled volume for optimal nutrient supply, and standardized geometry for consistent culture conditions. These localized optimizations ensure reliable single-cell isolation and high-throughput screening capability
Solution Approach 2:
The invention changes critical culture parameters by using gelatinized culture medium instead of liquid medium, controlling culture volume in the nanoliter range, and maintaining precise temperature and CO2 conditions. These parameter changes create an optimized micro-environment that enhances single-cell survival and recombinant protein production
3Measurement precision
If detection protein is added to gelatinized culture medium to evaluate recombinant protein production, then the amount of recombinant protein can be measured, but the detection process requires additional steps
Solution Approach 1:
A detection protein (such as an antibody specific to the recombinant protein) is introduced as an intermediary to quantify recombinant protein production. The detection protein binds to the target recombinant protein in the gelatinized culture medium, enabling precise measurement through fluorescence or other detection methods while maintaining the integrity of the single-cell culture system
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 method allows for efficient identification and isolation of high-producing cell strains by evaluating fluorescence and creating an extremely small culture environment, enhancing the proliferation and production of recombinant proteins.
Implementation Method 1
gelatinizing the culture medium in the storage sections
Implementation Method 2
adding a liquid containing a detection protein capable of binding to a recombinant protein produced by the single cell
Data Source
AI summary
A method for culturing a recombinant protein-producing cell includes the steps of: injecting a cell suspension, which contains a plurality of single cells capable of producing a recombinant protein in a culture medium, into a plate having a plurality of storage sections partitioned in minute sizes, and retaining the culture medium and one single cell in each of at least some of the plurality of storage sections; gelatinizing the culture medium in the storage sections; subjecting the single cell in each of the storage sections to a recombinant protein production period; and adding a liquid containing a detection protein capable of binding to a recombinant protein produced by the single cell in the gelatinized culture medium to the plate.