Phosphorous Stabilizers for RNA in Divalent Cation Solutions
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Solution Overview
Problem
RNA is unstable in aqueous solutions, prone to degradation by RNase enzymes and other mechanisms, and conditions necessary for downstream processing can exacerbate this instability, complicating applications like cDNA library construction and gene expression analysis.
Innovation Solution
A method involving a solution with water, RNA, divalent cations, and a phosphorous-containing compound such as phosphate or glycerol phosphate, incubated at elevated temperatures to protect RNA from degradation, while also allowing for DNase enzyme inactivation and accurate quantitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If RNA is stored in aqueous solution with divalent cations for downstream processing, then enzyme catalysis and hybridization reactions can be achieved, but RNA degradation increases
Solution Approach 1:
The patent introduces RNA stabilizing compounds as intermediary substances that mediate between the conflicting requirements of maintaining RNA stability and enabling downstream processing. These compounds act as protective agents that allow RNA to withstand the presence of divalent cations and processing conditions without degrading, thus resolving the contradiction by adding a protective intermediary layer.
Solution Approach 2:
The patent modifies the chemical parameters of the aqueous solution by adding specific stabilizing compounds (such as carbohydrates, amino acids, or their derivatives) that change the solution's properties to favor RNA stability. This parameter change allows the solution to simultaneously support both RNA integrity and downstream enzymatic reactions.
2Productivity
If heat is applied to RNA solution for processing, then hybridization reactions can be enhanced, but RNA degradation increases
Solution Approach 1:
The patent applies beforehand cushioning by pre-add stabilizing compounds to the RNA solution before heat treatment. These compounds provide protective cushioning that allows the RNA to withstand the thermal stress of hybridization reactions without degrading, thus enabling both high reaction efficiency and RNA integrity maintenance.
3Adaptability or versatility
If RNase enzymes are present in the solution, then natural RNA metabolism can occur, but RNA quality deteriorates
Solution Approach 1:
The patent converts the harmful effect of RNase enzymes into a beneficial situation by using stabilizing compounds that specifically protect RNA from enzymatic degradation. These compounds allow controlled RNA metabolism when needed while providing protection against uncontrolled degradation, thus converting the potential harm of RNase presence into a manageable condition that maintains RNA quality.
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 significantly stabilizes RNA at elevated temperatures, improving its accuracy of quantitation and reducing degradation, thus enhancing the reliability of RNA-based applications.
Implementation Method 1
the RNA is protected from degradation as compared to an RNA in an aqueous solution that contains the divalent cations but does not contain the phosphorous-containing compound
Implementation Method 2
incubating the provided solution at a temperature of at least 55 °C, 58 °C, 60 °C, 65 °C, 70 °C, or 75 °C inactivates the DNase enzyme
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
Methods and compositions are described herein for protecting RNA from autocatalytic and divalent cation induced degradation in an aqueous solution.