Cell Culture Virus Extraction with REACH-Compliant Detergent Lysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The ban on Triton X-100 due to environmental concerns necessitates the identification of alternative detergents for efficient virus extraction from cell culture.
Innovation Solution
The method involves the use of nonionic detergents like Tween 20 and anionic detergents like sodium deoxycholate, combined with endonucleases like Benzonase, to extract viruses from cell cultures, followed by filtration and chromatographic purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Triton X-100 is used for cell lysis and virus extraction, then efficient virus yield is achieved, but environmental compliance is violated due to its ban under REACH regulations
Solution Approach 1:
The patent changes the chemical parameter of the detergent from Triton X-100 to Tween 20, maintaining the nonionic detergent classification while achieving REACH compliance. This substitution preserves the cell lysis effectiveness and virus extraction efficiency while eliminating the environmental compliance issue.
Solution Approach 2:
The patent employs a disposable, environmentally acceptable alternative (Tween 20) that can be used without long-term environmental accumulation concerns, replacing the persistent and regulated Triton X-100.
2Object-affected harmful factors
If alternative detergents like Tween 20 are used to replace Triton X-100, then environmental compliance is achieved, but cell lysis efficiency may be reduced
Solution Approach 1:
The patent optimizes the concentration parameter of Tween 20 (testing ranges from 0.5% to 2.0%) and the incubation time parameter (1 to 4 hours) to achieve maximum cell lysis efficiency with the alternative detergent, matching or exceeding the performance of Triton X-100.
Solution Approach 2:
The patent introduces dynamic optimization by adjusting both detergent concentration and incubation time based on specific cell types and virus characteristics, allowing the system to adapt and achieve optimal lysis efficiency for different applications.
3Productivity
If extended incubation time is used with alternative detergents to improve cell lysis, then virus extraction efficiency increases, but processing time increases
Solution Approach 1:
The patent establishes dynamic incubation time parameters (1-4 hours) that can be adjusted based on cell type, detergent concentration, and desired extraction efficiency, allowing optimization between processing time and extraction yield for different应用场景.
Solution Approach 2:
The patent performs preliminary optimization studies to determine the optimal incubation time for specific cell-detergent combinations, allowing subsequent processes to use pre-determined time parameters that achieve maximum efficiency without unnecessary delays.
4Productivity
If higher detergent concentration is used to improve cell lysis, then virus yield increases, but residual detergent in the virus preparation increases
Solution Approach 1:
The patent optimizes the detergent concentration parameter within a specific range (0.5%-2.0%) to achieve sufficient cell lysis while minimizing residual detergent, balancing extraction efficiency with product purity requirements.
Solution Approach 2:
The patent implements continuous processing steps including filtration and chromatographic purification that continuously remove residual detergent from the virus preparation, maintaining low detergent levels throughout the process.
5Manufacturing precision
If multiple purification steps including filtration and chromatography are used, then virus purity increases, but process complexity increases
Solution Approach 1:
The patent combines multiple purification functions into an integrated workflow where filtration and chromatographic steps work sequentially to progressively purify the virus preparation, achieving high purity through combined rather than separate operations.
Solution Approach 2:
The patent uses chromatographic media as an intermediary substance that selectively binds and separates virus particles from contaminants, providing an efficient purification mechanism that simplifies the overall process compared to multiple mechanical separation steps.
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 achieves higher virus yields with reduced residual host cell DNA, making it suitable for virus production and purification, including clinical applications.
Implementation Method 1
contacting the host cells with a first buffer comprising a detergent
Implementation Method 2
contacting the cell lysate with a second buffer comprising an endonuclease for a second period of time to degrade the host cell nucleic acids
Data Source
AI summary
Provided herein are methods of producing virus from a culture of host cells. The methods include providing a culture of host cells which has been infected by the virus; contacting the host cells with a first buffer comprising a detergent and incubating the host cells in the presence of the first buffer for a first period of time thereby producing a cell lysate; contacting the cell lysate with a second buffer comprising an endonuclease for a second period of time to degrade the host cell nucleic acids; and collecting the virus.