PAMAM Capture Micro-Particles for Polynucleotide Extraction
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Solution Overview
Problem
Current methods for detecting polynucleotides in biological samples, particularly RNA viruses, are hindered by the presence of inhibitors, require laborious and costly procedures, and are limited by the need for large, expensive equipment, making rapid and sensitive detection challenging in clinical settings.
Innovation Solution
The use of micro-particles with high RNA and DNA binding capacity, such as PAMAM Generation 0 coated beads, which preferentially capture polynucleotides and inhibit their release, allowing for efficient extraction and purification in a streamlined process that includes lysis, washing, and release steps, enabling PCR-ready samples from small volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional polynucleotide detection methods are used, then detection sensitivity is improved, but the presence of inhibitors in biological samples interferes with enzyme function and reduces reliability
Solution Approach 1:
The patent extracts and removes inhibitors from biological samples through a multi-step purification process involving precipitation, filtration, and wash steps, separating the harmful inhibitor substances from the polynucleotide targets to enable reliable enzyme-based detection
Solution Approach 2:
The patent introduces alcohol-based precipitation reagents as intermediary substances that selectively bind to inhibitors and polynucleotides, allowing for their separation through phase transition and filtration, thereby mediating the removal of inhibitors before detection
2Manufacturing precision
If laborious extraction procedures are used to purify polynucleotides, then purity is improved, but the process becomes time-consuming and requires large equipment
Solution Approach 1:
The patent segments the extraction process into discrete, simplified steps (lysis, precipitation, filtration, wash, resuspension) that can be performed sequentially with minimal equipment, breaking down the complex purification process into manageable operations that reduce time while maintaining purity
Solution Approach 2:
The patent employs disposable microcentrifuge tubes, filters, and single-use reagent mixes that eliminate the need for large, expensive, reusable equipment and extensive cleaning protocols, enabling rapid extraction in clinical settings without time-consuming equipment maintenance
3Stability of the object's composition
If RNA molecules are processed with delicate handling, then stability is improved, but the complexity of the procedure increases
Solution Approach 1:
The patent performs preliminary stabilization of RNA by adding RNase inhibitors and performing rapid cooling steps immediately after extraction, preventing degradation before analysis and reducing the need for complex ongoing protection measures during storage and handling
4Measurement precision
If quantitative detection of polynucleotides is performed, then accurate measurement is improved, but the presence of inhibitors and sample complexity makes the measurement more difficult
Solution Approach 1:
The patent extracts inhibitors and interfering substances through precipitation and filtration steps, isolating pure polynucleotide samples that enable accurate quantitative measurement without interference from sample matrix components
Solution Approach 2:
The patent changes physical parameters such as temperature, pH, and alcohol concentration during the extraction process to selectively precipitate inhibitors and polynucleotides, optimizing their separation and enabling accurate subsequent quantification
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 enables rapid (15-20 minutes) and efficient extraction of high-quality RNA and DNA from complex samples, reducing inhibitor interference and achieving high purity and concentration, suitable for quantitative analysis and PCR, across various sample types and matrices.
Implementation Method 1
micro-particles with high RNA and DNA binding capacity, such as PAMAM Generation 0 coated beads, which preferentially capture polynucleotides
Implementation Method 2
The use of micro-particles with high RNA and DNA binding capacity, such as PAMAM Generation 0 coated beads, which preferentially capture polynucleotides and inhibit their release, allowing for efficient extraction and purification in a streamlined process that includes lysis
Data Source
AI summary
Methods for processing polynucleotide-containing biological samples, and materials for capturing polynucleotide molecules such as RNA and/or DNA from such samples. The RNA and/or DNA is captured by polyamindoamine (PAMAM (Generation 0)) bound to a surface, such as the surface of magnetic particles. The methods and materials have high efficiency of binding RNA and of DNA, and of release, and thereby permit quantitative determinations.