PCR-Ready Compositions for Mycobacterial Detection Without Cold Chain
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Solution Overview
Problem
Current methods for diagnosing Mycobacterial infections, such as tuberculosis, are hindered by the slow growth of mycobacteria, their unique cell wall structure making them resistant to antibiotics, and the need for complex laboratory conditions, which limits rapid and accurate detection, especially in resource-limited settings and remote locations.
Innovation Solution
Development of PCR-ready compositions containing a heat-stable polymerase, deoxynucleotide triphosphates, chelating agents, osmolarity agents, albumin, salts, and buffers, which can maintain nucleic acid integrity and facilitate rapid detection and identification of Mycobacterial pathogens at ambient temperatures, enabling safe collection, transport, and molecular analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex laboratory conditions and cold chain storage are used, then detection accuracy is improved, but device complexity and operational difficulty increase
Solution Approach 1:
The invention divides the diagnostic process into two independent components: (1) a field-deployable sample collection and stabilization module using MTM composition, and (2) a laboratory-based molecular detection module. This segmentation allows simple field operations without cold chain while maintaining high detection accuracy through controlled laboratory analysis of stabilized samples.
Solution Approach 2:
The MTM (molecular transport media) composition acts as an intermediary substance that stabilizes nucleic acids during transport. It mediates between the biological sample and the detection system, preserving sample integrity without requiring complex cold chain infrastructure, thus resolving the contradiction between simple field conditions and accurate detection.
2Measurement precision
If traditional culture methods are used, then pathogen identification is improved, but detection time increases
Solution Approach 1:
The invention performs preliminary stabilization of nucleic acids using MTM composition immediately upon sample collection. This preliminary action preserves genetic material integrity during transport, enabling rapid molecular detection upon arrival at the laboratory without the need for time-consuming culture procedures, thus reducing detection time while maintaining identification accuracy.
Solution Approach 2:
The invention replaces the mechanical/biological culture system with a molecular detection system (PCR). Instead of relying on slow bacterial growth and manual culture techniques, the stabilized nucleic acids are directly amplified and detected using molecular methods, substituting a time-intensive biological process with a faster chemical/biochemical detection method.
3Stability of the object's composition
If refrigeration and cold chain storage are used, then nucleic acid stability is improved, but energy consumption and operational complexity increase
Solution Approach 1:
The invention changes the chemical parameters of the storage medium by formulating MTM composition with stabilizing agents that maintain nucleic acid integrity at ambient temperatures. This parameter change eliminates the need for refrigeration (temperature parameter), reducing energy consumption while preserving nucleic acid stability during transport and storage.
4Adaptability or versatility
If resource-limited settings are served, then accessibility is improved, but diagnostic capability deteriorates
Solution Approach 1:
The invention segments the diagnostic workflow into field-applicable sample collection using simple MTM-stabilized specimens and laboratory-based molecular detection. This segmentation enables deployment in resource-limited settings where sophisticated equipment is unavailable, while maintaining high diagnostic capability through centralized or reference laboratory analysis of the stabilized samples.
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
These compositions allow for the stable detection and identification of Mycobacterial pathogens in biological samples, even at ambient temperatures, facilitating rapid diagnosis and reducing the need for cold chains, thus improving diagnostic capabilities in resource-limited areas.
Implementation Method 1
PCR-ready compositions containing a heat-stable polymerase, deoxynucleotide triphosphates, chelating agents, osmolarity agents, albumin, salts, and buffers, which can maintain nucleic acid integrity and facilitate rapid detection and identification of Mycobacterial pathogens
Implementation Method 2
PCR-ready compositions containing a heat-stable polymerase, deoxynucleotide triphosphates, chelating agents, osmolarity agents, albumin, salts, and buffers, which can maintain nucleic acid integrity
Implementation Method 3
PCR-ready compositions containing a heat-stable polymerase, deoxynucleotide triphosphates, chelating agents, osmolarity agents, albumin, salts, and buffers, which can maintain nucleic acid integrity and facilitate rapid detection
Data Source
AI summary
The invention is directed to compositions and methods for isolating, detecting, amplifying, and quantitating pathogen-specific nucleic acids in a biological sample. The invention also provides diagnostic kits containing specific amplification primers, and labeled detection probes that specifically bind to the amplification products obtained therefrom. Also disclosed are compositions and methods for the isolation and characterization of nucleic acids that are specific to one or more pathogens, including for example Influenza virus and Mycobacterium tuberculosis, from a wide variety of samples including those of biological, environmental, clinical and/or veterinary origin.