Perfused 3D Cell Bioreactor for Liver Disease Modeling
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Solution Overview
Problem
Current in vitro models and animal models fail to adequately capture the complex responses of human tissues to drugs and environmental agents, particularly in terms of liver toxicity and tumor cell interactions, due to the loss of key differentiated physiological functions in cultured cells, which limits the effectiveness of drug screening and toxicity assessment.
Innovation Solution
A system of perfused bioreactors in a multiwell plate format that replicates a capillary bed, allowing for three-dimensional cell monocultures and heterotypic cell co-cultures, enabling high-throughput assays for drug toxicity, metabolism, and disease modeling, including hepatic diseases and cancer, by circulating cell culture medium through micromatrices and using sensors for real-time monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cells are cultured in typical in vitro conditions, then cell culture is simple and maintainable, but cells lose key differentiated physiological functions
Solution Approach 1:
The patent employs porous scaffolds with controlled pore sizes and interconnectivity to support three-dimensional cell growth. These porous structures allow nutrient diffusion and waste removal while maintaining tissue architecture, enabling cells to retain differentiated physiological functions that are lost in conventional two-dimensional culture
Solution Approach 2:
The patent implements perfusion bioreactors that use fluid flow systems to circulate nutrients and growth factors through three-dimensional cell cultures. This hydraulic system mimics in vivo blood flow conditions, maintaining physiological function while enabling long-term culture viability
2Reliability
If three-dimensional tissue structures are created, then tissue function and interaction are better modeled, but system complexity increases
Solution Approach 1:
The patent divides complex tissue models into modular three-dimensional constructs that can be independently cultured and then combined. This segmentation allows for simplified individual unit fabrication while achieving complex tissue interactions when assembled, reducing overall system complexity
Solution Approach 2:
The patent designs perfusion bioreactors with universal interfaces and standardized components that can accommodate different tissue types and experimental configurations. This multi-functionality reduces the need for specialized equipment for each tissue model, thereby reducing overall system complexity
3Productivity
If high throughput screening is implemented, then productivity increases, but measurement precision may be compromised
Solution Approach 1:
The patent employs high-sensitivity sensors that detect multiple physiological parameters simultaneously (pH, oxygen, glucose, metabolites). By monitoring multiple parameters rather than single endpoints, the system maintains measurement precision while enabling parallel screening of multiple samples, thereby achieving high throughput without compromising accuracy
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 system effectively models human diseases and tissue interactions, enabling accurate drug screening, toxicity assessment, and metabolism studies, including liver toxicity and cancer, by maintaining tissue functions and allowing for the testing of gene therapy approaches, thereby improving the prediction of drug efficacy and safety.
Implementation Method 1
Perfused three-dimensional cell/tissue disease models
Implementation Method 2
maintained by diffusion
Implementation Method 3
using sensors for real-time monitoring
Implementation Method 4
matrix seeded with cells which forms a microtissue
Data Source
AI summary
A system has been constructed that recapitulate the features of a capillary bed through normal human tissue. The system facilitates perfusion of three-dimensional (3D) cell monocultures and heterotypic cell co-cultures at the length scale of the capillary bed. A major feature is that the system can be utilized within a “multiwell plate” format amenable to high-throughput assays compatible with the type of robotics commonly used in pharmaceutical development. The system provides a means to conduct assays for toxicology and metabolism and as a model for human diseases such as hepatic diseases, including hepatitis, exposure-related pathologies, and cancer. Cancer applications include primary liver cancer as well as metastases. The system can also be used as a means of testing gene therapy approaches for treating disease and inborn genetic defects.