Chaotropic Salt Stabilization for Nucleic Acids
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Solution Overview
Problem
Current stabilization solutions for nucleic acids in biological samples are complex, error-prone in production, and contain hazardous components, making them unsuitable for use in poorly controlled environments like farms, where safe handling is a concern and routine quality control measurements are inadequate.
Innovation Solution
A stabilization solution comprising a mixture of guanidinium thiocyanate and guanidinium hydrochloride at concentrations below 2.4 M each, which is non-hazardous and simplifies handling, allowing for effective stabilization of nucleic acids without the need for special safety precautions, using a combination of chaotropic salts that synergistically enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex mixtures of chaotropic salts are used to stabilize nucleic acids, then stabilization effectiveness is improved, but manufacturing precision deteriorates due to error-prone production and undetectable mistakes with routine quality control
Solution Approach 1:
The patent changes the concentration parameter of chaotropic salts from high (2-8 M) to low (0.1-2.0 M), which fundamentally alters the manufacturing process. This parameter change makes the solution less hazardous and enables reliable routine quality control measurements while maintaining nucleic acid stabilization effectiveness.
Solution Approach 2:
The patent uses composite mixtures of multiple chaotropic salts (guanidinium thiocyanate, guanidinium hydrochloride, sodium perchlorate) at optimized low concentrations. This composite approach achieves effective stabilization while allowing routine quality control, resolving both the stabilization effectiveness and manufacturing precision requirements.
2Reliability
If high concentrations of guanidinium salts are used, then nucleic acid stabilization is improved, but safety hazards increase requiring special precautions
Solution Approach 1:
The patent applies parameter change by reducing chaotropic salt concentrations from hazardous high levels (2-8 M) to safe low levels (0.1-2.0 M). This parameter transformation maintains stabilization effectiveness while eliminating the need for special safety precautions, allowing use in poorly controlled environments like farms.
Solution Approach 2:
The patent converts the harmful high concentration requirement into a beneficial low concentration formulation. By using optimized mixtures of multiple chaotropic salts at low concentrations, the solution achieves effective stabilization without the harmful effects of high concentrations, turning a safety liability into an operational advantage.
3Reliability
If complex mixtures with multiple components are used, then stabilization performance is improved, but device complexity increases making production error-prone
Solution Approach 1:
The patent uses composite materials by formulating optimized mixtures of multiple chaotropic salts at specific low concentrations. This composite approach achieves effective nucleic acid stabilization while keeping the formulation simple enough for reliable routine quality control, resolving the contradiction between performance and complexity.
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 solution effectively stabilizes nucleic acids during sample collection and transport, reducing the risk of false negative results in diagnostic tests, while simplifying production and handling processes by using less hazardous materials and reducing the complexity of the stabilization composition.
Implementation Method 1
The stabilization solutions used are based on chaotropic salts, such as guanidinium thiocyanate, guanidinium hydrochloride, sodium perchlorate or a mixture of two or more of these salts
Data Source
AI summary
The present invention relates to the stabilization of nucleic acid-containing crude sample materials for allowing its separation by separation methods. Stabilizing solutions containing mixtures of chaotropic salts suitable for said purpose are provided herewith. Furthermore, provided are nucleic acid separation kits and sample collection containers comprising such stabilizing solutions.