TDE-Based Nucleic Acid Purification for Small RNA Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for nucleic acid purification, particularly for small RNA molecules, face challenges such as the need for high alcohol concentrations which increase sample volume and processing time, and the use of toxic and hazardous reagents that complicate automation and environmental safety.
Innovation Solution
The use of tetraethylene glycol dimethyl ether (TDE) in combination with an aqueous buffer and chaotropic agents to effectively adsorb nucleic acids onto a solid phase, reducing the need for high alcohol concentrations and enhancing purification efficiency while minimizing the use of hazardous substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high concentrations of alcohol are used to bind small RNA molecules to solid support, then binding efficiency is improved, but sample volume increases and processing time increases
Solution Approach 1:
The invention changes the chemical parameter of the binding buffer by using TDE instead of high concentration alcohol, maintaining effective binding while reducing sample volume and processing time requirements
Solution Approach 2:
TDE acts as an intermediary substance that facilitates nucleic acid binding to solid support without requiring high alcohol concentrations, thereby improving efficiency while reducing processing time
2Reliability
If phenol extraction and salt precipitation methods are used for nucleic acid isolation, then high yield and purity are achieved, but the workflow becomes time-consuming and labor-intensive
Solution Approach 1:
The invention extracts and eliminates the time-consuming steps of phenol extraction and salt precipitation by using a simplified solid-phase binding method with TDE, achieving comparable purity faster
Solution Approach 2:
The invention replaces the mechanical workflow of multiple manual steps (phenol extraction, precipitation, centrifugation) with a simpler chemical binding approach using TDE and solid support
3Reliability
If toxic reagents such as phenol and high concentrations of chaotropic agents are used, then nucleic acid purification effectiveness is improved, but automation becomes difficult and environmental safety is compromised
Solution Approach 1:
The invention changes the chemical composition parameter by using TDE as a safer alternative to toxic reagents like phenol, enabling automation while maintaining purification effectiveness
Solution Approach 2:
The invention converts the potentially harmful use of toxic reagents into a beneficial safe chemical system using TDE, which achieves the same purification goals without the hazards that prevent automation
4Reliability
If small RNA molecules are purified using conventional methods, then purification is achieved, but extensive sample dilution with high amounts of alcohol is required
Solution Approach 1:
The invention changes the binding chemistry parameter by using TDE, which enables effective binding of small RNA molecules without requiring extensive sample dilution with alcohol
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
TDE facilitates efficient and high-yield nucleic acid purification with improved safety and reduced environmental impact, enabling more convenient and cost-effective nucleic acid isolation processes, including the purification of small RNA molecules without the need for extensive sample dilution or hazardous reagents.
Implementation Method 1
adsorption of a nucleic acid present in an aqueous adsorption solution to a solid substrate
Implementation Method 2
a strong denaturing effect on proteins high concentrations of chaotropic agents also mediate cell lysis
Implementation Method 3
nucleic acid molecules are bound to the surface of the solid phase
Implementation Method 4
the solid material is washed with solutions containing decreasing chaotropic salt concentrations and increasing alcohol concentrations
Implementation Method 5
the solid material is brought into contact with a low salt solution or water under alkaline pH in order to remove the bound nucleic acid from the solid phase
Data Source
AI summary
The invention provides the use of tetraethylene glycol dimethyl ether for adsorbing nucleic acids to solid phases such as those with silica surfaces. To this end, the invention also provides compositions comprising TDE. Methods are disclosed and claimed to purify nucleic acids from samples, as well as kits useful for performing these methods. Particularly, the invention encompasses methods for the purification of nucleic acids with low molecular weight. The nucleic acids purified by a method of the invention are suited for assays aiming at the detection of a target nucleic acid.