Electrophoretic Tissue Clarification Using Alkaline Buffer and Detergent
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Solution Overview
Problem
Current methods for producing transparent biological preparations for light microscopy, such as the CLARITY method, are laborious and time-consuming, requiring days to achieve transparency and involving the use of hydrogel fixation which limits the mobility of micelles and proteins.
Innovation Solution
An electrophoretic method using an aqueous alkaline solution with a buffer base having cations of at least 50 Da molecular weight and a non-ionic detergent at concentrations of 0.1-10% w/v, which enhances the efficiency of micelle removal by minimizing parasitic ion currents and allowing for faster clarification within a few hours without the need for hydrogel fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the CLARITY method is used to produce transparent biological preparations, then transparency is achieved, but the process becomes laborious and time-consuming (requiring days)
Solution Approach 1:
The patent changes the chemical parameters of the electrophoresis solution by using a buffer base with cations of at least 50 Da molecular weight at concentrations of 5-100 mmol/l and a non-ionic detergent at 0.1-10% w/v. These parameter changes enable faster micelle removal while maintaining transparency quality, reducing processing time from days to hours.
2Stability of the object's composition
If hydrogel fixation is used in the CLARITY method, then tissue structure is preserved, but mobility of micelles and proteins is limited
Solution Approach 1:
The patent extracts the tissue from the hydrogel fixation medium and processes it directly in the electrophoresis solution. This removes the constraint of hydrogel fixation, allowing micelles and proteins to move freely while the electric field efficiently removes micelles, achieving both structure preservation and high mobility.
3Productivity
If high electric field strength is applied for fast clarification, then processing time is reduced, but tissue heating increases
Solution Approach 1:
The patent introduces the electrophoresis solution with specific buffer base and non-ionic detergent as an intermediary medium. This solution facilitates efficient micelle removal through electrophoresis while the buffer base helps control temperature, allowing high productivity without excessive tissue heating.
4Loss of substance
If conventional electrophoresis solutions are used, then micelle removal occurs, but parasitic ion currents reduce efficiency
Solution Approach 1:
The patent changes the composition parameters of the electrophoresis solution by using a buffer base with cations of at least 50 Da molecular weight and a non-ionic detergent. These changes minimize parasitic ion currents while maintaining effective micelle removal, improving overall efficiency.
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 method achieves efficient clarification of biological tissues in a few hours, reducing procedural efforts and maintaining high electric field strength for effective micelle removal, while minimizing tissue heating and preserving protein mobility.
Implementation Method 1
biological tissue is clarified electrophoretically in that the tissue is immersed in an aqueous alkaline electrophoresis solution and subjected to an electric field in the electrophoresis solution
Implementation Method 2
the electrophoresis solution contains a buffer base whose cations have a molecular weight of at least 50 Da and a non-ionic detergent
Implementation Method 3
The electrophoresis solution contains boric acid, 0.4% (w/v) sodium dodecyl sulfate (SDS) and sodium hydroxide (NaOH) for adjusting a pH-value of 8.5
Data Source
AI summary
In a method for producing transparent biological preparations for examination by light microscopy biological tissue is electrophoretically clarified in that the tissue is immersed in an aqueous alkaline electrophoresis solution and is exposed to an electric field in the electrophoresis solution. The electrophoresis solution contains a buffer base, the cations of which have a molecular weight of at least 50 Da, at a concentration of 5 to 100 mol/m3 and a non-ionic detergent at a concentration of 0.1 to 10% (w/v).