Dynamic Hydrogel Stiffness for Organoid Maturation
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Solution Overview
Problem
Current methods for culturing organoids, such as kidney organoids, face challenges in maturation and the presence of off-target cell populations and aberrant extracellular matrix, which hinder their clinical application.
Innovation Solution
The development of dynamic hydrogels with specific stiffness and stress relaxation properties, ranging from 0.01 to 4 kPa and stress relaxation times of 104 seconds or less, respectively, to create a biomimetic environment that supports the maturation and proper development of organoids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organoids are cultured using conventional methods, then organoid formation occurs, but maturation is limited and off-target cell populations and aberrant ECM are present
Solution Approach 1:
The patent applies parameter changes by precisely controlling hydrogel stiffness (0.1-10 kPa) and stress relaxation time (10^3-10^4 seconds) to create an optimal biomimetic environment that promotes organoid maturation and reduces off-target cell populations and aberrant ECM deposition
Solution Approach 2:
The patent employs dynamic hydrogels with tunable stress relaxation properties that can adapt their mechanical characteristics over time, allowing the culture environment to evolve and support progressive organoid maturation while suppressing pathological features
2Ease of manufacture
If existing hydrogels are used for organoid culture, then organoid encapsulation is achieved, but specific stiffness and stress relaxation properties required for optimal maturation are not provided
Solution Approach 1:
The patent uses composite hydrogel materials combining natural and synthetic components to achieve simultaneous control over stiffness and stress relaxation properties, enabling both easy encapsulation and optimal maturation conditions
Solution Approach 2:
The patent systematically adjusts hydrogel formulation parameters including polymer concentration, crosslinking density, and degradation rate to achieve the specific stiffness (0.1-10 kPa) and stress relaxation time (10^3-10^4 seconds) ranges required for improved organoid maturation
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 use of these dynamic hydrogels leads to more mature kidney organoids with all major renal segments present, reduced expression of fibrosis-related markers, and improved lumen structure and cilia formation, enhancing their potential for clinical use.
Implementation Method 1
cross-linking the polymer with aldehyde groups with a cross-linking agent to obtain a cross-linked polymer
Implementation Method 2
the hydrogel has a stress relaxation time (t1/2) of 104 seconds or less as measured by relaxation modulus
Implementation Method 3
the resulting hydrogel has a stiffness between 0.01 and 4 kPa as measured by shear moduli
Data Source
AI summary
The invention relates to a hydrogel from crosslinked polymers with a defined stiffness. The described hydrogels are particularly useful for growing organoids such as for example kidney organoids. The invention further relates to methods of manufacturing the hydrogels and to methods of culturing organoids, as well as uses of the obtained hydrogels.