Multilayer Electrode Biologic Sensor for Real-Time Toxicology
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current in vitro toxicological assays are slow, expensive, and unreliable, making them unsuitable for early-stage drug or product development, particularly for human tissue samples like cardiovascular, neurovascular, and brain samples, as they lack real-time monitoring capabilities.
Innovation Solution
A multilayer electrode biologic sensor is fabricated using a sterilizable support matrix with composite layers of conductive ink, biocompatible hydrogel, and live cells, enabling real-time monitoring of cell viability through Electric Cellular-Substrate Impedance Sensing (ECIS) for toxicity screening and viability assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional in vitro toxicological assays are used for human tissue, then the assays can be performed earlier in product development, but the assays are slow, expensive, and unreliable without real-time monitoring
Solution Approach 1:
The patent replaces traditional mechanical/optical monitoring methods with electrical impedance sensing to detect cell viability. The ECIS system uses electrical fields to continuously monitor cellular responses in real-time, substituting slow manual or endpoint optical assays with rapid electrical measurements that provide continuous data without disturbing the cells.
Solution Approach 2:
The patent implements continuous real-time monitoring of cell viability through impedance sensing. Instead of discrete endpoint measurements, the system continuously tracks cellular impedance changes, providing an unbroken stream of data that enables dynamic assessment of toxicological effects throughout the assay duration.
2Reliability
If in vivo assays are used for toxicological testing, then reliable data on human tissue effects can be obtained, but the assays are expensive, harmful to animals, and performed too late in product development
Solution Approach 1:
The patent creates in vitro copies of human tissue using human-derived cells cultured on electrode surfaces. These cell cultures serve as simplified models that replicate human tissue responses to toxicological agents, providing reliable predictive data without requiring actual human or animal testing. The impedance-based detection copies the electrical properties of viable cells to assess toxicity.
Solution Approach 2:
The patent enables toxicological testing to be performed much earlier in the product development pipeline. By using in vitro human cell models with real-time impedance monitoring, companies can screen potential toxins before investing heavily in later-stage development, allowing early elimination of problematic compounds and more efficient resource allocation.
3Adaptability or versatility
If multilayer composite structure is fabricated with multiple bonding steps, then the sensor achieves functional integration, but the fabrication process becomes complex
Solution Approach 1:
The patent combines multiple functional layers (support matrix, conductive ink, biocompatible hydrogel, and cell layers) into an integrated multilayer composite structure. Each layer is deposited sequentially and bonds to the previous layer, merging structural support, electrical conductivity, biocompatibility, and cellular functionality into a single unified sensor system that performs both mechanical and biological functions.
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
The solution provides rapid, cost-effective, and reliable real-time quantitative data on the effects of environmental conditions and toxicological agents on human cells, enhancing the efficiency of toxicity testing and reducing the need for costly late-stage animal testing.
Implementation Method 1
real-time monitoring of cell viability through Electric Cellular-Substrate Impedance Sensing (ECIS)
Data Source
AI summary
Methods and apparatus are presented which allow for the in vitro measurement of cell viability in multilayered electronic biologic sensors. The use of printed layer composites containing conductive and nonconductive layers provide quantitative data on human tissue toxicology in real-time. The printing process permits a wide range of design options, like materials of composition, type of live cells, testing regimes, and live cell viability monitoring.