Thermoresponsive Substrate with Localized Temperature Control for Cell Assembly
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Solution Overview
Problem
Conventional techniques for in vitro cell cultivation are limited in creating targeted, reproducible microenvironments for biological cells, as they often rely on single-cell manipulation and are impractical for two- or three-dimensional cell assembly, and the microenvironment's conditions can only be varied to a limited extent.
Innovation Solution
A thermoresponsive substrate with temperature-controlled segments using resistance heating and Peltier cooling elements, allowing for localized control of cell adhesion properties by adjusting the temperature above or below the switching temperature of the thermoresponsive polymer material, enabling the targeted arrangement and manipulation of biological cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional techniques for single-cell manipulation are used, then individual cell positioning is possible, but two- or three-dimensional cell assembly becomes impractical and limited
Solution Approach 1:
The substrate surface is divided into multiple temperature-controlled segments or zones, each capable of independent temperature regulation. This segmentation allows different regions to have different adhesion properties simultaneously, enabling parallel assembly of multiple cell structures rather than sequential single-cell manipulation
Solution Approach 2:
The invention uses temperature as a controllable parameter to modulate polymer adhesion properties. By changing the temperature of specific substrate segments above or below the polymer's switching temperature, the adhesion state can be dynamically adjusted, allowing cells to be released or retained in a controlled manner for efficient 2D/3D assembly
2Adaptability or versatility
If thermoresponsive polymers are used for cell adhesion control, then temperature-dependent adhesion switching is achieved, but localized control of different substrate segments becomes limited
Solution Approach 1:
The substrate incorporates multiple independent temperature control elements (heaters and coolers) that can be divided into separate controllable segments. Each segment can be independently regulated to different temperatures, allowing localized adhesion control without requiring complex system-wide temperature changes
Solution Approach 2:
The invention combines both heating elements and cooling elements into a single integrated substrate system. This merging of opposite thermal control capabilities in one device enables bidirectional temperature regulation (above and below switching temperature) without requiring multiple separate devices, thereby managing complexity while enhancing versatility
3Adaptability or versatility
If microenvironment conditions are varied for cell cultivation, then cell growth and differentiation can be optimized, but the extent of variation is limited in conventional systems
Solution Approach 1:
The system enables precise control of microenvironment conditions by independently regulating temperature parameters in different substrate segments. This allows creation of reproducible temperature gradients and zones that can be systematically varied to study different microenvironment conditions while maintaining exact reproducibility through digital control
Solution Approach 2:
Different segments of the substrate can be assigned different temperature conditions simultaneously, creating locally optimized microenvironments for different cell types or experimental conditions. This local quality control allows multiple microenvironment variations to coexist on a single substrate with high reproducibility
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 approach allows for the creation of defined cell structures and microenvironments with freely selectable environmental conditions, enabling efficient and reproducible two- or three-dimensional cell arrangements, overcoming the limitations of conventional techniques.
Implementation Method 1
When thermoresponsive polymers are immobilized on surfaces, they undergo a phase transition (conformational transition) in aqueous media when the switching temperature is exceeded: they are more hydrated below the switching temperature than above.
Implementation Method 2
temperature-controlled segments into a temperature range between a temperature above a critical phase transition temperature (switching temperature) of the thermoresponsive polymer material and a temperature below the switching temperature of the polymer material by means of resistance heating and Peltier cooling elements
Implementation Method 3
temperature-controlled segments into a temperature range between a temperature above a critical phase transition temperature (switching temperature) of the thermoresponsive polymer material and a temperature below the switching temperature of the polymer material by means of resistance heating and Peltier cooling elements
Data Source
Figure 1A~1D
Figure 1E~2C
Figure 3A~4C
AI summary
A substrate (10), which is arranged to receive biological cells (21) in the adhering state, comprises a substrate body (11) with a support area (12) on which there is arranged a thermoreactive polymer material (13), with at least one heating element (41, 42) being provided by means of which the temperature of at least a segment of the support area (12) can be adjusted locally. Also described are a culture facility which is arranged for culturing biological cells (21) and which comprises the substrate (10), and a method for disposing biological cells on the substrate (10).