Affinity Matrix Column for Single-Step Nucleic Acid Purification
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Solution Overview
Problem
Current nucleic acid isolation methods are cumbersome, time-consuming, and prone to degradation and cross-contamination, especially when dealing with low concentrations in complex samples, limiting their applicability in resource-constrained settings.
Innovation Solution
A novel affinity column integrating cell adsorption and nucleic acid purification in a single step using a solid support with both cell-binding and nucleic acid-binding moieties, such as antibiotics, to isolate DNA and RNA from biological and environmental samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-step extraction and purification protocols are used, then nucleic acid isolation quality is improved, but processing time and operational complexity increase
Solution Approach 1:
The patent combines multiple isolation steps (lysis, binding, washing, elution) into a single integrated column device. The column contains multiple functional zones including a lysis matrix, a binding matrix with nucleic acid-binding moieties, and wash/elution matrices, all in one device that processes the sample through sequential steps without requiring separate tubes or containers.
Solution Approach 2:
The affinity column is designed as a universal device that can process various sample types (blood, tissue, environmental samples) and isolate both DNA and RNA. The column contains multiple matrices with different functions (lysis, binding, washing, elution) that work together in a single device, making it applicable to diverse nucleic acid isolation needs without requiring protocol changes.
2Reliability
If multi-step extraction protocols are used, then nucleic acid purity is improved, but risk of degradation and cross-contamination increases
Solution Approach 1:
By integrating all processing steps within a single sealed column device, the patent eliminates the need to transfer samples between multiple tubes or containers. The column maintains the sample throughout the entire process, preventing contamination from external sources and reducing the risk of degradation from repeated handling and exposure to different environments.
Solution Approach 2:
The patent uses a specialized binding matrix containing nucleic acid-binding moieties (such as charged surfaces, chaotropes, or affinity ligands) as an intermediary that selectively captures nucleic acids from the lysed sample. This binding matrix acts as a protective intermediary that separates the nucleic acid from contaminating proteins and other cellular debris, ensuring purity while maintaining nucleic acid integrity throughout the process.
3Quantity of substance
If conventional isolation methods are used, then nucleic acid recovery is improved, but device complexity and resource requirements increase
Solution Approach 1:
The column is divided into distinct functional segments or matrices, each optimized for a specific step: a lysis matrix for cell disruption, a binding matrix for nucleic acid capture, a wash matrix for contaminant removal, and an elution matrix for nucleic acid release. This segmentation allows each component to be optimized for its specific function while maintaining a relatively simple overall device structure that requires minimal external equipment.
Solution Approach 2:
The affinity column is designed to perform all isolation steps autonomously using internally contained reagents and matrices. The lysis matrix contains reagents for cell disruption, the binding matrix provides nucleic acid-binding moieties, and the elution matrix contains buffers for nucleic acid release. The device requires minimal external intervention, needing only sample input and basic buffer additions, making it suitable for resource-limited settings while maintaining high recovery 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
Facilitates rapid, efficient, and reliable isolation of nucleic acids from low-concentration samples, reducing sample loss and contamination, suitable for point-of-care diagnostics in resource-limited settings.
Implementation Method 1
a second solid support comprising an affinity matrix, wherein the affinity matrix comprises at least one nucleic acid binding moiety
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3C
AI summary
The present disclosure relates to nucleic acid extraction and purification methods and devices to accomplish the same. The present disclosure proposes a novel approach to this problem wherein cell isolation and nucleic acid purification can be integrated in a single "step," by using the same solid phase for both cell adsorption and nucleic acid purification. This is achieved by binding the cells to a solid support as a first step. The same solid support is then used under conditions that lyse the bound cells, and then subsequently enable the nucleic acid to bind to the support. Methods of the present disclosure relate to the isolation of nucleic acid, and especially to a method for isolating DNA from cells, biological or environmental samples using antibiotics, which bind nucleic acids.