Cascading Amplification Biosensing via CRISPR Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current biosensing methods face challenges in detecting biological materials at small concentrations due to limitations in signal amplification, often resulting in non-specificity and false positives, particularly requiring expensive equipment and skilled technicians.
Innovation Solution
The method involves cascading amplification steps using primary and secondary sensing agents, where the primary sensing agent is activated by a target biomolecule, catalyzing the activation of a secondary sensing agent, which then generates a detectable signal, utilizing CRISPR enzymes and other catalytic activities to enhance sensitivity and specificity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensitive sensing methods are used to detect small quantities of analyte, then detection sensitivity is improved, but non-specificity increases leading to false positives
Solution Approach 1:
The sensing system is divided into multiple discrete sensing agents (primary sensing agent, secondary sensing agent, and signal agent) that work in a cascaded manner. Each agent performs a specific function: the primary sensing agent binds the target analyte, the secondary sensing agent is activated by the primary agent, and the signal agent generates the detectable signal. This segmentation allows each component to be optimized for its specific function, improving both sensitivity and specificity.
Solution Approach 2:
The secondary sensing agent acts as an intermediary between the primary sensing agent and the signal agent. It receives activation from the primary sensing agent and transmits this activation to the signal agent, which generates the detectable signal. This intermediary step provides an additional layer of specificity control while maintaining sensitivity.
2Measurement precision
If conventional amplification methods like PCR are used to detect biological material, then detection sensitivity is improved, but equipment cost and operational complexity increase
Solution Approach 1:
The sensing agents are designed to be self-activating through cascaded catalytic reactions. The primary sensing agent activates the secondary sensing agent, which in turn activates the signal agent, creating a self-amplifying system that does not require external equipment intervention. This self-service mechanism eliminates the need for expensive PCR machinery while maintaining high detection sensitivity.
Solution Approach 2:
The system utilizes changes in catalytic activity parameters to achieve amplification. By designing the sensing agents with specific catalytic properties and activation thresholds, the system achieves exponential signal amplification through sequential catalytic reactions, replacing the need for thermal cycling equipment with a chemical parameter-driven process.
3Measurement precision
If conventional biosensing methods are used, then detection capability is maintained, but skilled technician involvement is required
Solution Approach 1:
The cascaded sensing system performs all detection functions automatically through self-activating catalytic reactions. The primary sensing agent automatically activates the secondary sensing agent, which then activates the signal agent, eliminating the need for skilled technician intervention in the amplification process. The system is as simple as adding the sample and reading the signal.
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 enables sensitive, specific, and reliable detection of biological markers such as DNA, RNA, and proteins, improving the detection of small quantities of analytes while reducing the need for expensive equipment and skilled labor.
Implementation Method 1
the primary sensing agent comprises a first catalytic activity that results in activation of the secondary sensing agent
Implementation Method 2
the activated secondary sensing agent comprises a second catalytic activity for a reaction that results in detection of the signal agent
Data Source
AI summary
The invention relates generally to systems and methods for assaying a biological sample suspected of comprising a target biomolecule using cascading amplification.