RNA Extraction from Biofluids Using Cellulose Paper and Two-Step Analysis
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Solution Overview
Problem
Current methods for extracting RNA from biological samples, especially small RNA species, are inefficient and prone to degradation, particularly in challenging samples like fibrous tissues and biofluids, which complicates downstream applications such as sequencing and disease marker detection.
Innovation Solution
A method involving the use of a sample collection apparatus with cellulose paper to dry biofluids like blood, followed by a two-step analytical methodology that includes determining the coefficient of variance for RNA transcripts to filter out technical variance and enhance the accuracy of biomarker profiling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If RNA is stored at ambient temperature, then ease of storage and handling is improved, but RNA stability and integrity deteriorate due to chemical self-hydrolysis and enzyme-mediated degradation
Solution Approach 1:
The patent extracts and isolates RNA from the biological sample matrix using purification kits that separate RNA from proteins, cellular debris, and other contaminants. This extraction process removes sources of degradation (enzymes and cellular components) while preserving RNA integrity, enabling stable storage at ambient temperatures.
Solution Approach 2:
The patent uses RNA stabilization reagents and purification buffers as intermediaries to protect RNA during extraction and storage. These chemical intermediaries prevent hydrolysis and enzymatic degradation, allowing RNA to maintain stability without requiring refrigeration.
2Ease of operation
If small volumes of biofluids are used for sampling, then invasiveness is reduced and patient comfort is improved, but the quantity of RNA available for analysis decreases
Solution Approach 1:
The patent employs highly sensitive detection methods and concentration techniques that change the effective parameters of RNA analysis. By using optimized extraction protocols and sensitive quantification methods, sufficient RNA can be obtained and analyzed from minimal sample volumes.
Solution Approach 2:
The patent uses universal purification kits and protocols that can efficiently extract RNA from various biofluid types (blood, saliva, urine) regardless of volume. These multi-functional methods ensure adequate RNA recovery from small sample volumes suitable for non-invasive collection.
3Loss of information
If fibrous tissues are processed for RNA extraction, then tissue biomarkers can be obtained, but extraction efficiency and RNA integrity worsen due to tissue complexity and degradation
Solution Approach 1:
The patent performs preliminary tissue processing steps including homogenization, lysis, and stabilization before RNA extraction. These preliminary actions break down the fibrous structure and prevent degradation, making subsequent RNA extraction more efficient and preserving biomarker integrity.
Solution Approach 2:
The patent segments the complex tissue processing into distinct steps: stabilization, homogenization, lysis, and purification. This segmentation allows optimization of each step for fibrous tissues, improving overall extraction efficiency while maintaining RNA quality.
4Ease of manufacture
If traditional RNA extraction methods are used, then established protocols are followed, but measurement precision and detection accuracy worsen due to technical variance and degradation
Solution Approach 1:
The patent incorporates quality control measures and normalization protocols that provide feedback on RNA integrity and extraction efficiency. This feedback allows adjustment of protocols to minimize technical variance and improve measurement precision while maintaining operational simplicity.
Solution Approach 2:
The patent uses dynamic protocols that adapt to sample-specific characteristics, optimizing extraction conditions for each sample type. This dynamic approach improves detection accuracy by adjusting parameters based on actual sample quality and composition rather than following rigid fixed protocols.
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 approach allows for the reliable extraction and analysis of RNA from small volumes of biofluids, improving the stability and integrity of RNA samples, enabling effective biomarker profiling and disease monitoring without the need for invasive sampling.
Implementation Method 1
a sample collection apparatus with cellulose paper to dry biofluids like blood
Implementation Method 2
determining the coefficient of variance for RNA transcripts to filter out technical variance
Data Source
AI summary
The present invention relates to a method of creating a biomarker profile, the method comprising the steps of: obtaining a sample of biofluid from a subject, wherein the sample is stored on a sample collection apparatus; removing the sample from the sample collection apparatus; extracting nucleic acids from the sample; sequencing the extracted nucleic acids to generate sequence data; and analyzing the sequence data using a two-step analytical methodology to create the biomarker profile. The present invention is also directed to methods of determining the sex of an in utero fetus, predicting onset of a migraine in a subject, and of tracking athletic performance in a subject.