RNA Hybridization Efficiency via Thermal Disruption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for identifying pathogenic organisms, such as PCR-based techniques and mass spectrometry, are slow and prone to false negatives and positives due to intolerance to laboratory samples' biochemical milieu and limitations in recognizing peptide signatures, necessitating a rapid and sensitive detection method for effective treatment and food supply protection.
Innovation Solution
A method involving heating a cell lysate sample between 80° C. and 95° C. to disrupt RNA secondary structure, combined with a chaotropic agent in the lysis buffer, to enhance hybridization efficiency between probes and target RNA, allowing for rapid detection of pathogens by increasing accessibility and reducing RNA degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PCR-based techniques are used for pathogen detection, then amplification of signal enables earlier detection, but polymerase intolerance to biochemical milieu introduces false negatives and positives and requires processing steps that cause delays
Solution Approach 1:
The patent extracts and eliminates the PCR amplification step from the detection process, directly detecting pathogen RNA through hybridization with labeled probes. This removes the source of polymerase intolerance and processing delays while maintaining detection capability through direct RNA recognition in the native sample matrix.
Solution Approach 2:
The patent introduces labeled probes as intermediaries that directly bind to pathogen RNA sequences. These probes serve as the detection mediators, eliminating the need for PCR polymerases and enabling direct detection of RNA in complex biochemical environments without amplification steps.
2Measurement precision
If mass spectrometry is used for pathogen identification, then protein signature recognition is achieved, but the need to unambiguously recognize peptide signatures limits recognition capability and introduces false positives
Solution Approach 1:
The patent replaces mass spectrometry's complex peptide signature analysis with a simpler nucleic acid hybridization system. By detecting RNA sequences directly through probe binding, the method eliminates the need for complex peptide identification while maintaining or improving pathogen discrimination capability through sequence-specific probe design.
3Productivity
If conventional hybridization methods are used without heating, then RNA secondary structure is maintained, but hybridization efficiency is reduced due to inaccessible target sites
Solution Approach 1:
The patent applies preliminary heating to the sample before probe hybridization to disrupt RNA secondary structures and make target sites accessible. This pre-treatment step ensures that the RNA is in a denatured state conducive to probe binding, significantly improving hybridization efficiency without requiring excessive temperatures or prolonged heating.
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 significantly increases hybridization efficiency and sensitivity, enabling rapid detection of pathogens within an hour, improving the speed and accuracy of laboratory diagnostics and allowing for timely treatment or removal of contaminated food products.
Implementation Method 1
heating a sample, such as a cell lysate sample, comprising at least one target RNA... at a temperature between about 80° C. and about 95° C. for a time sufficient to interfere with secondary structure of the RNA
Implementation Method 2
the sample comprises a cell lysis buffer comprising a chemical denaturant, for example a chaotropic agent
Implementation Method 3
the sample is contacted with at least one detectable probe, such as a labeled probe, designed to specifically hybridize to the target RNA in the cell lysate. Hybridization between the probe and the target RNA is detected.
Data Source
AI summary
This disclosure relates to a method for increasing the hybridization efficiency of a probe and a target RNA in a sample, for example to identify a particular RNA present in the sample. The method includes heating a lysate sample comprising at least one target RNA, such as a tRNA, mRNA or rRNA, at a temperature of about 95° C. for a time sufficient to interfere with secondary structure of the RNA, wherein the time is short enough, such that the RNA in the cell lysate sample are not significantly degraded, and wherein the lysate comprises a cell lysis buffer comprising a chemical denaturant. To detect a target RNA in the lysate, the lysate is contacted with at least one detectable probe, such as a labeled probe, designed to specifically hybridize to the target RNA in the lysate.