Two-Part Buffer System for Hazard-Free Nucleic Acid Extraction
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Solution Overview
Problem
Current nucleic acid extraction methods are cumbersome, time-consuming, and require hazardous materials, limiting their efficiency and safety for rapid and accurate detection of pathogens.
Innovation Solution
A two-part buffer composition comprising a lysis buffer with a pH of 1.8 to 3.0 and a wash buffer with a pH of 6.8 to 7.6, containing specific reagents like N-acetyl cysteine, polyoxyethylene acyl ether, and potassium citrate, which facilitates efficient extraction and amplification of nucleic acids without hazardous ingredients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard extraction buffers are used, then nucleic acid extraction can be achieved, but hazardous materials are required and protocols are complicated and time-consuming
Solution Approach 1:
The patent changes the chemical parameters of the extraction buffer by using alternative reagents (proteinase K, SDS, EDTA, NaCl) that are non-hazardous but still effective for nucleic acid extraction. The buffer composition is modified to eliminate toxic substances while maintaining extraction functionality through optimized reagent selection and concentration ranges.
Solution Approach 2:
The patent employs disposable swab samples and single-use buffer compositions that eliminate the need for hazardous materials. The extraction system is designed as a disposable, self-contained unit that can be discarded after use, avoiding the need for hazardous reagent storage and handling infrastructure.
2Reliability
If standard extraction buffers are used, then nucleic acid extraction can be achieved, but protocols are complicated and time-consuming
Solution Approach 1:
The patent combines multiple extraction steps into a single integrated protocol where the buffer composition performs lysis, protein digestion, and nucleic acid stabilization simultaneously. The merged protocol eliminates separate incubation steps and reduces the number of manual operations required, achieving extraction in a single streamlined procedure.
Solution Approach 2:
The patent incorporates preliminary actions within the buffer composition itself, where reagents are pre-activated and ready for immediate use. The buffer is formulated to begin extraction actions upon contact with the sample, eliminating the need for separate reagent preparation steps and reducing overall protocol time.
3Reliability
If standard extraction buffers are used, then nucleic acid extraction can be achieved, but the process is hazardous and requires special handling
Solution Approach 1:
The patent employs disposable swab samples and single-use buffer compositions that eliminate the need for hazardous materials. The extraction system is designed as a disposable, self-contained unit that can be discarded after use, avoiding the need for hazardous reagent storage and handling infrastructure.
Solution Approach 2:
The patent converts the potential harm of requiring strong chemical reagents into a benefit by using milder, non-hazardous alternatives that achieve the same extraction效果. The alternative buffer composition uses physiological-grade reagents that are safe for human contact while maintaining effective nucleic acid extraction capabilities.
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 buffer system enables rapid, efficient, and safe extraction of nucleic acids, reducing hands-on time and eliminating the need for hazardous reagents, while achieving superior PCR sensitivity and detection of pathogens like SARS-CoV-2, Flu A, and RSV.
Implementation Method 1
a lysis buffer having a pH of about 1.8 to about 3.0, the lysis buffer comprising a lysis reagent, an antioxidant, and a lysis detergent
Implementation Method 2
contacting the lysed sample with a plurality of magnetic particles to produce magnetic particles complexed with the extracted nucleic acid
Implementation Method 3
exposing the magnetic particles complexed with the extracted nucleic acid, if present, with a magnetic field and removing the lysis buffer
Implementation Method 4
contacting the magnetic particles complexed with the extracted nucleic acid, if present, with a wash buffer having a pH of about 6.8 to about 7.6
Implementation Method 5
contacting the magnetic particles complexed with washed nucleic acid, if present, with an elution buffer to produce an elution sample comprising washed, extracted nucleic acid
Data Source
AI summary
Buffer compositions, such as two-part buffer compositions and buffer systems, methods, assays, kits and kits of parts comprising buffers, for rapid, non-hazardous and fully automated extraction of nucleic acids from various samples. The described buffers do not contain hazardous materials, yet unexpectedly provide more efficient nucleic acid extraction when compared to standard buffers containing harmful ingredients. The present technology provides superior nucleic acid extraction efficiency without the drawbacks associated with standard, hazardous extraction buffers.