Polysaccharide Coating for CTC Capture on Medical Devices
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Solution Overview
Problem
Current medical sampling devices face challenges in selectively and efficiently capturing circulating tumor cells (CTCs) from the bloodstream due to low capture rates and damage during retrieval, limiting their effectiveness for cancer monitoring and diagnosis.
Innovation Solution
A coating comprising end-point attached polysaccharides, such as hyaluronic acid, is applied to medical sampling devices to enhance the capture of bioanalytes like CTCs by providing a binding affinity and hemocompatibility, allowing for increased sensitivity and selectivity, and enabling the release of captured cells for further analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional medical sampling devices are used to capture CTCs, then the device structure is simple, but the capture rate is low and cell damage occurs during retrieval
Solution Approach 1:
The patent applies parameter changes by modifying the surface properties of the medical device through coating with polysaccharides (such as hyaluronic acid). This changes the chemical and physical parameters of the device surface to enhance binding affinity for CTCs while maintaining device structural simplicity, thereby increasing capture rate without significantly complicating the device structure.
Solution Approach 2:
The patent uses composite materials by combining the base medical device material with polysaccharide coatings. This creates a composite structure where the polysaccharide layer provides enhanced CTC capture capabilities through specific binding interactions, while the underlying device structure remains relatively simple and functional.
2Measurement precision
If conventional sampling devices are used, then the device is easy to operate, but the selectivity and sensitivity for CTC capture are insufficient
Solution Approach 1:
The polysaccharide coating modifies the surface parameters of the device to provide specific binding affinity for CTCs through biological recognition mechanisms. This enhances selectivity and sensitivity without requiring complex operational procedures, as the enhanced capture is achieved through material properties rather than operational complexity.
3Reliability
If standard capture methods are used, then the process is simple, but the captured cells suffer damage during retrieval
Solution Approach 1:
The polysaccharide coating changes the surface parameters of the device to enable gentle, specific binding of CTCs. This allows for reliable cell capture and retrieval while maintaining cell viability, as the biological coating provides selective adhesion without the mechanical stress associated with conventional capture methods.
Solution Approach 2:
The device is pre-coated with polysaccharides before use to establish the capture mechanism in advance. This preliminary action ensures that when CTCs are encountered, they are immediately captured through specific binding, reducing the need for complex retrieval operations that could damage the cells.
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 coating significantly improves the capture rate of CTCs while maintaining their viability, enabling more reliable monitoring of tumor resistance and aiding in the diagnosis of cancer and sepsis by allowing for the efficient isolation and analysis of CTCs directly from the bloodstream.
Implementation Method 1
A coating comprising end-point attached polysaccharides, such as hyaluronic acid, is applied to medical sampling devices to enhance the capture of bioanalytes like CTCs by providing a binding affinity
Data Source
AI summary
The present invention provides a coating comprising one or more polysaccharides with binding affinity for bioanalytes, for application on the surface of a medical sampling device, wherein the one or more polysaccharides are end-point attached to the surface of the medical device, and wherein the one or more end-point attached polysaccharides have one or more polysaccharides end-point grafted to the side groups extending from their backbone. The invention also provides a process for preparing the same as well as a medical diagnostic device comprising the coating.