HAMA-Modified Polymer Hydrogel for Cuttable Expansion Microscopy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current hydrogels used in expansion microscopy are prone to fragmentation and lack rigidity, making them difficult to cut and limiting the application of expansion microscopy to large tissues and iterative expansion microscopy due to the working distance limitations of fluorescence microscopes.
Innovation Solution
A polymer production method involving immunostaining, anchoring, and multiple swelling hydrogel solutions, including hyaluronic acid methacryloyl (HAMA), to create a hydrogel with enhanced rigidity and resistance to breaking, allowing for easy cutting and scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional hydrogels are used in expansion microscopy, then the hydrogel can be used for embedding biological samples, but the hydrogel lacks rigidity and is prone to fragmentation, making it difficult to cut
Solution Approach 1:
The patent uses a composite hydrogel system combining multiple polymer components (acrylamide, sodium acrylate, N,N'-methylenebisacrylamide, and hyaluronic acid methacryloyl) to achieve both rigidity and ease of cutting. The composite structure allows the hydrogel to maintain structural integrity while remaining suitable for microscopic analysis after cutting.
Solution Approach 2:
The patent modifies the hydrogel composition by adjusting the concentration and molecular weight parameters of the polymer components, particularly incorporating hyaluronic acid methacryloyl with specific molecular weight ranges (0.1-2000 kDa), to optimize the balance between rigidity and cutability for expansion microscopy applications.
2Adaptability or versatility
If conventional hydrogels are used in expansion microscopy, then the hydrogel can be used for embedding, but the hydrogel is too elastic and difficult to cut, limiting application to large tissues
Solution Approach 1:
The patent changes the physical and chemical parameters of the hydrogel by incorporating hyaluronic acid methacryloyl with controlled molecular weights and adjusting the cross-linking density through parameter optimization, thereby reducing excessive elasticity while maintaining adaptability for large tissue samples.
Solution Approach 2:
The composite hydrogel formulation combines polymers with different mechanical properties to create a material that is neither too rigid nor too elastic, enabling successful application to large tissues while maintaining ease of cutting and scanning.
3Strength
If the hydrogel is made more rigid to resist breaking, then the hydrogel becomes easier to cut, but the working distance limitation of fluorescence microscopes remains
Solution Approach 1:
The patent applies expansion microscopy principles to expand the biological sample in specific dimensions, allowing the sample to be thinned and flattened after embedding, thereby reducing the effective working distance requirement while maintaining the structural integrity provided by the rigid hydrogel matrix.
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 modified hydrogel achieves a magnification of 60 times or more, overcoming working distance limitations and enabling detailed microscopic analysis of large biological samples.
Implementation Method 1
uses the water-absorbing and swelling characteristics of the hydrogel to expand the distance between the fluorescent molecules of the sample
Implementation Method 2
The modified hydrogel achieves a magnification of 60 times or more, overcoming working distance limitations
Data Source
AI summary
A polymer and its production method provided by the disclosure use HAMA to modify the hydrogel. The modified hydrogel has properties of being insusceptible to breaking and has moderate strength for cutting and scanning. The modified hydrogel combined with iExM's technology may achieve a magnification of 60 times or more. In this way, the modified and expanded hydrogel sample may be cut for performing a layer-by-layer microscopic observation, so that the application of expansion microscopy is no longer limited by samples that are too large to be operated within the limited working distance, the application scope of expansion microscopy may be improved, and the novel iExM modified hydrogel system may be further applied to biological tissues to achieve a resolution scale of nearly tens of nanometers, so as to gain insight into the microstructure and mysteries of biological tissues and a deeper understanding of the structure and physiology of organisms.