Biological Sample Thermal Denaturation for Protease Inactivation
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Solution Overview
Problem
Biological samples degrade quickly after extraction, leading to the degradation of proteins and peptides, which complicates analysis and often results in the identification of degradation products instead of original components, making it difficult to preserve the integrity of the sample for analysis.
Innovation Solution
A method involving rapid and uniform heating of the biological sample to disrupt secondary structures while preserving primary structures, thereby reducing proteolytic activity and minimizing degradation, which includes shaping the sample to facilitate uniform heating and using a heat source to denature proteolytic molecules without degrading the primary structure of macromolecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the biological sample is kept at room temperature or refrigerated after extraction, then the sample can be stored and handled, but the proteins and peptides rapidly degrade due to proteolytic activity
Solution Approach 1:
The patent applies parameter changes by rapidly heating the biological sample to high temperatures (e.g., 95-100°C or higher) for a very short duration (seconds to minutes). This thermal parameter change denatures proteolytic enzymes, stopping protein degradation, while the brevity of the heating period prevents significant degradation of the target proteins and peptides themselves.
Solution Approach 2:
The patent implements preliminary action by immediately heating the sample right after extraction, before proteolytic degradation can significantly occur. This pre-emptive thermal treatment preserves the sample integrity for subsequent analysis by inactivating degradative enzymes before they can act on the proteins of interest.
2Reliability
If heating is applied to denature proteins and stop degradation, then proteolytic activity is reduced, but there is a risk of degrading the primary structure of the target proteins
Solution Approach 1:
The patent applies partial action by selectively denaturing only the proteolytic enzymes through controlled heating, while maintaining conditions that preserve the primary structure of target proteins. The heating parameters (temperature, duration) are optimized to achieve sufficient enzyme inactivation without excessive heat exposure that would damage the proteins of interest.
Solution Approach 2:
The patent implements skipping by rapidly heating the sample through the critical temperature zone and maintaining it briefly, then immediately cooling. This rushed thermal treatment is sufficient to denature proteases but too brief to cause significant degradation of the target proteins' primary structures.
3Reliability
If the sample is heated uniformly, then all proteolytic molecules are effectively inactivated, but achieving uniform heating throughout the sample volume is difficult
Solution Approach 1:
The patent applies segmentation by dividing the sample into smaller portions or using small sample volumes that can be heated uniformly. This ensures that all parts of the sample reach the denaturation temperature simultaneously, achieving complete proteolytic inactivation without requiring complex heating control systems.
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 method effectively preserves the primary structure of proteins and peptides, allowing for accurate comparison of protein and peptide content across samples and reducing degradation, enabling non-fatal sampling and maintaining sample integrity for analysis.
Implementation Method 1
heating the shaped sample so that the secondary structure of the macromolecule is disrupted, but the primary structure is not
Implementation Method 2
heating the shaped sample to cause the shaped sample to uniformly attain a temperature at which the activity of the proteolytic molecule is disrupted
Data Source
AI summary
Methods and devices for preparing a biological sample for analysis are described. The biological sample from an organism has at least macromolecule having a primary structure that naturally degrades after the sample is removed from the organism. The method includes causing the biological sample to adopt a shape to permit rapid and uniform heating. The shaped sample is then rapidly and uniformly heated, thereby altering a secondary structure of the macromolecule while preserving its primary structure.