TIL Culture Chamber With Selective Diaphragm for Sterile Media Exchange
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Solution Overview
Problem
Current TIL manufacturing processes are limited by length, cost, and sterility concerns, necessitating improved cost-effectiveness, sterility, and scalability for producing potent anti-cancer phenotypes.
Innovation Solution
A novel cell culture device with a diaphragm and spacer configuration allows for automated/semi-automated TIL expansion with minimal human intervention, featuring a liquid-impermeable and liquid-permeable sections to control liquid flow and maintain sterility, and includes a spacer with porous structures for media exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional TIL manufacturing processes are used, then TIL expansion can be achieved, but the process is limited by length, cost, and sterility concerns
Solution Approach 1:
The culture device is divided into multiple chambers (first chamber for cell culture, second chamber for media reservoir) separated by a diaphragm with selective permeability. This segmentation allows independent optimization of each chamber's function while maintaining controlled interaction through the diaphragm, enabling faster media exchange without compromising sterility.
Solution Approach 2:
The diaphragm acts as an intermediary structure between the two chambers, providing selective permeability that allows small molecules (nutrients, waste products) to pass while preventing cell migration and maintaining sterility barriers. This intermediary enables efficient mass transfer while preserving the integrity of both chambers.
2Extent of automation
If automated/semi-automated processes are implemented, then minimal human intervention is achieved, but device complexity increases
Solution Approach 1:
The diaphragm serves multiple functions simultaneously: it acts as a physical barrier separating chambers, provides selective permeability for molecule transport, maintains structural integrity under pressure differentials, and enables automated media exchange. This multi-functionality reduces the need for additional components, thereby limiting complexity growth despite increased automation.
Solution Approach 2:
The diaphragm incorporates porous structures that enable passive diffusion and convective flow of media and molecules based on size-selective permeability. This passive transport mechanism eliminates the need for complex active pumping systems within the device, allowing automation through external fluid handling while keeping the device structure relatively simple.
3Reliability
If liquid flow control is enhanced through diaphragm design, then sterility is improved, but manufacturing precision requirements increase
Solution Approach 1:
The diaphragm exhibits spatially varying properties: certain regions are liquid-impermeable to maintain sterility barriers, while other regions are liquid-permeable to enable controlled media flow. This local differentiation of permeability properties allows simultaneous achievement of sterility maintenance and flow control without requiring high-precision manufacturing throughout the entire structure.
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
Enables efficient, scalable, and sterile TIL expansion with enhanced potency and reduced manufacturing time, improving the quality and consistency of TIL preparations for cancer therapy.
Implementation Method 1
a second section that extends from the boundary towards a proximal end of the interior space, the second section being liquid-permeable to allow liquid to pass from the first chamber to the second chamber through the second section
Implementation Method 2
The spacer of the cell culture device has a porous structure through which liquid (e.g., cell culture media) may flow
Data Source
AI summary
A cell culture device includes an interior space defined between a first wall and a second wall, a diaphragm disposed between a first chamber and a second chamber of the interior space, the diaphragm including a first section being liquid-impermeable to prevent liquid from passing from the first chamber to the second chamber through the first section, and a second section being liquid-permeable to allow liquid to pass from the first chamber to the second chamber through the second section, and a spacer positioned in the second chamber, the spacer being sized and located to maintain a liquid flow path between the diaphragm and the second wall.