Patterned Polymer Cell Capture Substrate
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Solution Overview
Problem
Current methods for capturing and analyzing microbial cell surface carbohydrates are inefficient, inaccurate, and costly due to the dynamic nature of extracellular glycan expression, often requiring additional processing steps that alter glycan concentrations and complicate analysis.
Innovation Solution
A patterned polymer composition with a cell-targeting agent, such as lectin, affixed to a solid substrate using a block-copolymer like PGMA-b-PVDMA, which provides a non-destructive method for capturing and characterizing microbial exopolysaccharides by recognizing and binding to specific oligosaccharide moieties, enhancing capture efficiency through three-dimensional topography and increased contact area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods (chromatography, mass spectroscopy, NMR) are used to analyze extracellular glycans, then analytical data can be obtained, but additional processing steps are required that alter glycan concentrations and reduce accuracy
Solution Approach 1:
The patent extracts and immobilizes lectins (carbohydrate-binding proteins) onto solid supports, creating a simplified capture system that directly binds extracellular glycans without requiring complex processing steps. This extraction of the binding function from complex analytical workflows enables direct measurement of glycan concentrations while maintaining accuracy.
Solution Approach 2:
The patent introduces lectins as intermediary molecules that mediate between the solid support and extracellular glycans. These lectins specifically recognize and bind to carbohydrate moieties on microbial cell surfaces, enabling selective capture and analysis of glycans without the need for complex sample preparation or processing steps.
2Productivity
If conventional analytical methods are used, then glycan analysis can be performed, but the methods are slow and low throughput
Solution Approach 1:
The patent performs preliminary action by pre-immobilizing lectins onto solid supports before sample analysis. This pre-preparation of the capture surface enables direct binding of glycans from environmental samples without requiring time-consuming sample processing, extraction, or preparation steps, thereby significantly increasing throughput and reducing analysis time.
Solution Approach 2:
The patent replaces complex mechanical processing systems (chromatography columns, mass spectrometry instruments, NMR equipment) with a simpler solid-phase binding system. This substitution eliminates the need for complex mechanical operations and enables high-throughput analysis through direct incubation and washing steps.
3Ease of manufacture
If conventional methods are used, then glycan composition can be analyzed, but the methods are expensive
Solution Approach 1:
The patent employs disposable solid supports (such as microplates or beads) coated with lectins for single-use glycan capture and analysis. This approach eliminates the need for expensive, complex analytical instrumentation while maintaining measurement precision through specific lectin-glycan binding. The disposable nature of the supports keeps costs low and simplifies workflow.
4Reliability
If lectins are attached to solid substrate, then selective microbial capture is enabled, but capture efficiency must be maximized through optimized attachment methods
Solution Approach 1:
The patent optimizes capture efficiency by changing parameters such as lectin concentration, attachment chemistry, solid support surface area, and incubation conditions. By systematically adjusting these parameters, the patent maximizes the number of available binding sites while maintaining selective recognition of target glycans, thereby achieving both high reliability and high productivity in microbial capture.
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 solution enables effective and selective capture of microbes, allowing for compositional and functional characterization of exopolysaccharides without the drawbacks of conventional methods, promoting or inhibiting microbial growth, and facilitating microbial population management.
Implementation Method 1
A cell-targeting agent, such as lectin... is capable of specifically recognizing (and hence, selectively targeting) extracellular oligosaccharide moieties
Implementation Method 2
The block-copolymer may be, for example, poly(glycidyl methacrylate)-block-4,4-dimethyl-2-vinylazlactone ('PGMA-b-PVDMA'), which can be employed as a surface scaffold for lectin-specific microbial capture
Implementation Method 3
the patterned polymer has a three-dimensional topography, which can improve cell capture by providing a higher contact area
Data Source
AI summary
A composition useful for cell capture, the composition comprising a solid substrate on which is affixed a patterned polymer, and a cell-targeting agent attached to said patterned polymer, wherein said cell-targeting agent is exposed. Also described is a method for the preparation of the cell capturing composition, as well as flow through devices in which the cell capturing composition is incorporated. Further described is a method of capturing cells by contacting the cell-capturing composition with a liquid or gaseous sample containing cells. The method for capturing cells may also be a method for testing for the presence of one or more classes or species of cells or cellular organisms in a liquid or gaseous sample.