Micropatterned Bioprintable Hydrogels for Tissue-Native BBB Models
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Solution Overview
Problem
Current in vitro and in vivo models for studying the blood-brain barrier (BBB) are limited in their ability to mimic the natural three-dimensional, highly organized, and dynamic structure of the human brain, and existing bioprinting methods fail to recapitulate functional brain architecture, hindering the understanding of BBB disruption during strokes and the development of effective treatments.
Innovation Solution
A device comprising a hydrogel with micropatterned channels seeded with neurons, astrocytes, and endothelial cells, using photolithographic techniques to create precise microstructures that mimic the BBB, allowing for the study of neuronal activity and BBB function, including the formation of synaptic networks and the co-culture of healthy and diseased cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If current in vitro and in vivo models are used to study the BBB, then research can be conducted, but the models fail to accurately mimic the natural three-dimensional, highly organized, and dynamic structure of the human brain
Solution Approach 1:
The invention divides the complex brain tissue into segmented functional units by embedding distinct cell types (endothelial cells, pericytes, astrocytes) in separate regions within the hydrogel matrix, allowing each cell type to be cultured and studied independently while maintaining their natural spatial relationships and interactions in the reconstructed BBB model
Solution Approach 2:
The invention transitions from traditional two-dimensional cell culture models to three-dimensional hydrogel-based constructs that recapitulate the natural 3D architecture of brain tissue, enabling cells to self-organize in three-dimensional space and form complex structures such as vascular networks and tissue layers that cannot be achieved in 2D systems
2Reliability
If existing bioprinting methods are used, then tissue structures can be created, but they fail to recapitulate functional brain architecture
Solution Approach 1:
The invention performs preliminary actions by pre-seeding different cell types into specific regions of the hydrogel scaffold before final assembly, allowing cells to initially adhere and organize in their designated locations, which facilitates subsequent self-organization into functional brain tissue architectures without requiring complex multi-step bioprinting procedures
Solution Approach 2:
The invention uses hydrogel materials as intermediary scaffolds that provide a biomimetic extracellular matrix environment, facilitating cell adhesion, proliferation, and self-organization while temporarily supporting the structure during tissue formation, thereby enabling functional brain architecture development without requiring direct complex bioprinting of mature tissue structures
3Productivity
If traditional stroke treatment methods are used, then clot removal can be achieved, but BBB disruption and neurotoxicity occur causing long-term complications
Solution Approach 1:
The invention uses the disrupted BBB model itself as a tool to study and understand the harmful effects, transforming the previously harmful BBB disruption phenomenon into a beneficial research opportunity by creating controlled models that allow investigation of disruption mechanisms and development of protective strategies
Solution Approach 2:
The invention creates in vitro copies of the BBB and stroke pathology using patient-derived cells and hydrogel scaffolds, allowing researchers to study clot removal effects, BBB disruption, and neurotoxicity in controlled laboratory settings without exposing actual patients to these harmful effects, thereby enabling development of safer treatment protocols
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 device enables the recreation of functional synaptic networks and BBB models, facilitating the study of neuronal signaling during strokes, providing insights into normal vs. post-stroke tissue differences, and potentially leading to improved stroke treatments that minimize long-term complications.
Implementation Method 1
exposing the photomask and hydrogel to UV light
Data Source
AI summary
A device for modelling physiological and pathophysiological states of the brain is provided. The device comprises a hydrogel with micropattern channels having a length, width and depth. The micropattern channels comprise cells selected from the group consisting of neurons, astrocytes, microglia, oligodendrocytes, neuronal organoids, cancer cells, cancer spheroids, brain tumoral cells and combinations thereof.