Polymer-Modified Magnetic Nanomaterial for CTC Enrichment
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Solution Overview
Problem
Existing magnetic nanomaterials for enriching circulating tumor cells (CTCs) suffer from insufficient polymer content, poor stability, and long response times, leading to inefficiencies in detection and enrichment processes.
Innovation Solution
Development of polymer-modified magnetic nanomaterials with a core-shell structure, where a cationic polymer coating on magnetic nanoparticles provides a positive charge, enhancing stability and response speed, allowing for selective enrichment of CTCs, glycosylated proteins, polypeptides, nucleic acids, and exosomes with high selectivity and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional magnetic nanomaterials are used for CTC enrichment, then the basic enrichment function is achieved, but the polymer content is insufficient leading to poor stability and long response time
Solution Approach 1:
The patent applies composite materials by combining magnetic nanoparticles with polymer coatings to create polymer-modified magnetic nanomaterials. This composite structure integrates the magnetic properties of Fe3O4 nanoparticles with the stabilizing and functional properties of polymer layers, achieving both high stability and sufficient polymer content simultaneously
Solution Approach 2:
The patent changes the chemical and physical parameters of the nanomaterial surface by modifying the polymer coating characteristics. By adjusting polymer molecular weight, composition, and coating thickness, the material achieves optimal stability and response time while maintaining adequate polymer content
2Productivity
If conventional magnetic nanomaterials are used for CTC enrichment, then the basic enrichment function is achieved, but the response time is long reducing detection efficiency
Solution Approach 1:
The patent modifies key parameters including polymer coating thickness, magnetic nanoparticle size, and surface charge density to optimize the response time. These parameter changes enable faster interaction with target CTCs while maintaining enrichment efficiency
Solution Approach 2:
The patent replaces conventional mechanical separation methods with magnetically-driven enrichment using polymer-modified magnetic nanomaterials. This substitution enables rapid response through magnetic field interaction, significantly reducing detection time compared to traditional mechanical approaches
3Measurement precision
If existing magnetic nanomaterials are used, then CTC enrichment is possible, but the selectivity and specificity are insufficient leading to false positives or negatives
Solution Approach 1:
The patent applies local quality by creating specifically designed polymer coatings with particular chemical groups and charge distributions on the magnetic nanoparticle surface. This localized modification enables selective interaction with CTCs based on their unique surface properties, improving both selectivity and detection accuracy
Solution Approach 2:
The polymer coating acts as an intermediary layer between the magnetic nanoparticle core and the target CTCs. This intermediary polymer layer provides specific recognition sites and charge interactions that enhance selective binding, reducing false positives and negatives while maintaining high detection accuracy
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 polymer-modified magnetic nanomaterials achieve stable and rapid enrichment of target biomolecules, enabling effective detection and potential applications in dual-modal imaging and cancer treatment, with improved sensitivity and specificity, reducing medical burden and detection time.
Implementation Method 1
tumor cells produce a large amount of lactic acid due to glycolysis, resulting in a large amount of negative surface charge, while normal cells are electrically neutral or slightly positively charged. Accordingly, efficient and selective enrichment of CTCs can be achieved based on the unique charge difference between tumor cells and normal cells
Implementation Method 2
Ferroferric oxide magnetic nanoparticles (Fe3O4 MNPs) have received extensive attention and research in the fields of biotechnology and medicine due to their special structure and excellent performance. Such materials are generally multifunctional composite nanoparticles with ferromagnetism
Data Source
AI summary
Disclosed are a polymer-modified magnetic nanomaterial (polymer-modified MNM), and a preparation method and use thereof. Provided is the polymer-modified magnetic nanomaterial, including the following structure: a polymer is attached to or coated on a surface of a magnetic nanomaterial (MNM) to form the polymer-modified MNM that is positively charged, wherein the polymer is a cationic polymer, the MNM has a core-shell structure, a core is a magnetic nanoparticle (MNP), and a shell is a modified layer and the modified layer is attached to or coated on a surface of the MNP to form a modified layer-compounded MNP; and a mass ratio of the polymer to the MNM in the polymer-modified MNM is in a range of 1:10 to 20:1.