Single-Cell Chemical Lysis With Impedance Feedback Control
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Solution Overview
Problem
Existing cell lysis methods are inefficient, often leading to incomplete lysis, degradation of cellular contents, and lack simultaneous genetic and mechanical information acquisition, particularly in single-cell analysis.
Innovation Solution
A chemical lysis system with feedback-controlled lysing chambers and sensors that monitor and control the lysis process, allowing for precise lysis and simultaneous genetic and mechanical analysis of individual cells using a microfluidic chip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cell lysis methods are used, then cell membrane rupture is achieved, but cellular contents degrade and lysis is incomplete
Solution Approach 1:
The patent employs real-time feedback control through impedance sensors that continuously monitor the lysis process. When the sensor detects that lysis is complete (indicated by impedance change), the system automatically stops lysing agent delivery, preventing over-lysis and degradation of cellular contents while ensuring complete membrane rupture.
Solution Approach 2:
The system dynamically adjusts the concentration and delivery rate of lysing agents based on real-time impedance measurements. By changing these parameters adaptively rather than using fixed concentrations, the system achieves complete lysis while minimizing degradation of sensitive cellular components.
2Loss of information
If conventional bulk lysis methods are used, then processing is simple, but simultaneous genetic and mechanical information acquisition is not achieved
Solution Approach 1:
The patent segments the lysis process into individual single-cell analysis events rather than bulk processing. Each cell is lysed separately in a microfluidic chamber, allowing simultaneous measurement of mechanical properties (through impedance changes during lysis) and genetic content (through subsequent analysis of released DNA/RNA), thereby preventing information loss.
Solution Approach 2:
The lysis system is designed to perform multiple functions simultaneously: mechanical property measurement, genetic material extraction, and real-time monitoring. This multi-functional approach enables concurrent acquisition of both mechanical and genetic information from the same cell without requiring separate processing lines.
3Reliability
If excessive lysing agent is used to ensure complete lysis, then lysis completeness improves, but cellular contents degradation increases
Solution Approach 1:
The impedance-based feedback system detects the exact moment when cell membrane rupture is complete and immediately halts lysing agent delivery. This prevents excessive exposure to lysing agents that would otherwise continue to degrade cellular contents after lysis is achieved, thereby maintaining substance integrity while ensuring complete lysis.
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
Ensures complete and controlled lysis of cells without degradation, enabling simultaneous genetic and mechanical information acquisition at a single-cell level, enhancing the reliability and efficiency of downstream analyses.
Implementation Method 1
a sensor to detect a state within the lysing chamber
Data Source
AI summary
In one example in accordance with the present disclosure, a chemical lysis system is described. The chemical lysis system includes a microfluidic channel to serially feed individual cells from a volume of cells to at least one chemical lysing device. Each chemical lysing device includes at least one lysing chamber to receive, from the microfluidic channel, a single cell to be lysed. The chemical lysing device also includes an orifice disposed in each lysing chamber to receive a lysing agent and a sensor to detect a state within the lysing chamber. A controller of the chemical lysis system analyzes a ruptured cell.