3D Nanostructured Porous Membrane for Cell Co-Culture
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current microfluidic cell culture devices using PDMS membranes are limited by suboptimal biocompatibility, absorption of organic components, and mechanical properties, which affect the accuracy of 3D organ models and require cell lysis for marker detection, leading to differences in cell behavior and metabolic responses compared to 2D cultures.
Innovation Solution
A microfluidic cell culture chip with a 3D nanostructured porous membrane featuring folds forming hollow protuberances for cell culture, allowing for the recovery of secretions without cell lysis, enabling kinetic studies and maintaining cell viability, and comprising a non-resorbable membrane with a perforated support for secure attachment and gas exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDMS porous membrane is used for cell co-culture, then mechanical stresses and microarchitecture can be reproduced, but biocompatibility is suboptimal due to absorption of organic components and intrinsic property differences from natural basal membrane
Solution Approach 1:
The patent changes the material parameter from PDMS to collagen, which fundamentally alters the biocompatibility properties. Collagen is a natural extracellular matrix component that closely mimics the natural basal membrane, eliminating the absorption issues and intrinsic property differences while maintaining the mechanical stress reproduction capability through the membrane structure itself
Solution Approach 2:
The patent uses a composite structure combining collagen membrane with polylactic glycolic acid (PLGA) support elements. The collagen provides biocompatibility and natural membrane properties, while the PLGA provides structural support and enables 3D microvilli formation, creating a synergistic system that resolves the contradiction between mechanical properties and biocompatibility
2Measurement precision
If cell markers are detected by immunofluorescence after cell attachment and antibody marking, then marker detection is achieved, but cell lysis is required which prevents kinetic studies and maintains only static analysis
Solution Approach 1:
The patent extracts the detection function from the cell itself by collecting secretions in the microfluidic system. Instead of lysing cells to detect intracellular markers, the system captures secreted molecules in the culture medium, allowing non-invasive, real-time monitoring of cell activity and kinetics while maintaining cell viability
Solution Approach 2:
The patent introduces the culture medium as an intermediary between the cells and the detection system. Secreted molecules are released into the medium and can be sampled and analyzed without disturbing the cells, serving as a mediator that enables marker detection while preserving cell life for ongoing kinetic studies
3Ease of manufacture
If 2D membrane culture is used, then cell co-culture is simple to implement, but topography of certain organs cannot be reproduced
Solution Approach 1:
The patent transitions from 2D membrane culture to 3D culture by incorporating PLGA support elements that form microvilli structures. This dimensional change allows reproduction of organ topography while maintaining the simplicity of microfluidic implementation, as the 3D structures are integrated within the same chip architecture
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 the collection and analysis of secretions from living cells over time, providing a qualitative and quantitative profile of secreted molecules, thus overcoming the limitations of 2D cultures and improving the accuracy of 3D organ models by maintaining cell viability and functionality.
Implementation Method 1
on which are cultured adherent cells on either side of said membrane at the protuberances
Implementation Method 2
a support consisting of a non-resorbable membrane (1), comprising an upper face (2) and a lower face (3), perforated by at least one perforation (4)
Implementation Method 3
The coupling of this membrane with a microfluidic system makes it possible to recover the cell secretions during the culture thereof
Data Source
AI summary
A microfluidic cell culture chip which contains a central module comprising a central unit, which contains a support consisting of a non-resorbable membrane, a 3D nanostructured porous membrane, comprising at least one protuberance, and the 3D nanostructured porous membrane and that at least one protuberance being composed of materials suitable for the culture of two distinct cell types; a base, and the central unit being integrated in the base, and forming a whole with the base.