3D Printed Cell Sensor for Toxin Detection
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Solution Overview
Problem
Current methods for evaluating the toxicity of deoxynivalenol-family mycotoxins, such as two-dimensional cell experiments and animal tests, face challenges like low precision, high costs, and limited ability to assess combined toxicity effects, with existing cell electrochemical sensors experiencing issues with uneven distribution and low detection precision.
Innovation Solution
A cell electrochemical sensor is constructed using 3D printing technology, combining carbon nanofibers with GelMA composite hydrogel and lung adenocarcinoma epithelial cells, which are precisely deposited on a screen-printed carbon electrode, allowing for the measurement of impedance changes to assess cytotoxicity and determine combined toxicity effects using the combination index method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional two-dimensional cell culture methods are used, then the cost is low and the cycle is short, but the detection precision and reliability are insufficient due to greater differences from human body environments
Solution Approach 1:
The patent transitions from traditional two-dimensional cell culture to three-dimensional cell culture by embedding cells within a hydrogel matrix. This dimensional change creates a more physiologically relevant environment that better mimics in vivo conditions, thereby improving detection precision and reliability while maintaining reasonable system complexity
Solution Approach 2:
The patent employs composite hydrogel materials combining multiple components to create a three-dimensional culture environment. This composite approach enables the system to provide both structural support and physiological functionality, improving measurement precision without excessive complexity increase
2Reliability
If animal toxicology experiments are conducted, then the results truly and comprehensively reflect the effects of drugs on the body, but the cost is high, the cycle is long, and repeatability is unsatisfactory
Solution Approach 1:
The patent creates a simplified three-dimensional cell culture model that copies the essential physiological features of in vivo environments without requiring whole animal systems. This model copying approach maintains result reliability for toxicity assessment while dramatically reducing experiment cycle and cost
Solution Approach 2:
The patent develops a disposable three-dimensional cell culture sensor system that can be quickly prepared and discarded after use. This approach replaces expensive, time-consuming animal experiments with a cheaper, faster cell-based model that maintains sufficient reliability for toxicity evaluation
3Measurement precision
If cells are immobilized using traditional methods to construct cell sensors, then the sensor can be prepared, but the cell distribution is uneven and detection precision is low
Solution Approach 1:
The patent achieves uniform cell distribution throughout the three-dimensional hydrogel matrix by incorporating cells during the hydrogel formation process. This ensures consistent local cell quality and density throughout the sensor, improving both manufacturing precision and subsequent detection precision
Solution Approach 2:
The patent performs preliminary cell incorporation during hydrogel fabrication before the sensor is finalized. This preliminary action ensures uniform cell distribution is established early in the manufacturing process, preventing distribution issues that would otherwise require complex correction 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 approach provides a reliable, high-reproducibility method for quickly evaluating cytotoxicity and determining the combined effects of deoxynivalenol-family mycotoxins, offering improved sensitivity and precision in toxin detection, suitable for drug development, toxicology testing, and environmental monitoring.
Implementation Method 1
3D printing technology is a computer-aided technology which produces engineering tissue in a mechanized, organized and optimized way, can assemble tissue by precisely positioning biological materials and living cells layer by layer
Implementation Method 2
The impedance value is measured by an electrochemical AC impedance method to judge the damage conditions of cells after the cells are stimulated by toxins
Data Source
AI summary
The disclosure relates to a cell electrochemical sensor based on a 3D printing technology and application thereof and belongs to the technical field of electrochemical sensors and toxin detection. The cell electrochemical sensor of the disclosure is constructed based on a 3D printing technology, and the construction method comprises the following steps: precisely depositing a cell/carbon nanofiber/GelMA composite hydrogel on a working electrode of a screen-printed carbon electrode through 3D printing, and carrying out curing to obtain the cell electrochemical sensor. The disclosure constructs a cell electrochemical sensor with a three-dimensional cell growth environment and rapid and sensitive response. The cell electrochemical sensor constructed by the disclosure can be used for quickly and effectively determining the combined effect type and effect degree of deoxynivalenol family toxins by combining an electrochemical impedance method and a combination index method.