FSL Construct Inkjet Printing for Glycan Microarray Localization
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Solution Overview
Problem
Current methods for fabricating glycan microarrays face challenges in achieving high sensitivity and accuracy for carbohydrate-protein interactions, particularly in immobilizing glycans on substrates and localizing them to discrete areas for diagnostic purposes.
Innovation Solution
A method involving the use of synthetic constructs of the structure F-S-L, where F is a functional moiety, S is a spacer that allows dispersibility in water, and L is a diacyl- or dialkyl lipid, is used to localize glycans or peptides on substrates using a non-impact inkjet printing technique, enabling precise patterning and interaction with binding molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If robotic printing arrayers are used to immobilize glycans on activated glass slides, then glycan microarrays can be fabricated, but the sensitivity and accuracy for carbohydrate-protein interactions are insufficient
Solution Approach 1:
The patent changes the chemical parameters of the substrate by using carbodiimide-activated substrates instead of traditional NHS-activated glass slides. This chemical modification enables direct covalent bonding of amine-containing glycans to the substrate, improving the stability and sensitivity of carbohydrate-protein interactions without requiring complex robotic printing equipment
Solution Approach 2:
The invention replaces expensive, complex robotic printing arrayers with simple, disposable activated substrates that can be directly incubated with glycan solutions. This eliminates the need for expensive custom-made robotic equipment while achieving reliable and sensitive detection results
2Reliability
If glycans are immobilized on derivatised substrate surfaces, then glycan microarrays can be fabricated, but non-specific contacts occur
Solution Approach 1:
The patent applies local quality by creating distinct functional zones on the substrate surface. The carbodiimide activation is localized to specific areas where glycans are intended to be immobilized, while other areas remain inactive. This spatial differentiation reduces non-specific contacts by ensuring that only designated regions bind glycans, improving assay specificity
3Manufacturing precision
If neoglycolipids are applied by spray-on technique, then glycan microarrays can be fabricated, but precise localization to discrete areas is difficult to achieve
Solution Approach 1:
The patent applies preliminary action by pre-activating specific discrete areas of the substrate with carbodiimide before applying the glycan solution. This pre-preparation ensures that glycans are immobilized only in the intended discrete areas with high precision, eliminating the need for complex spray-on techniques while maintaining ease of manufacture through simple incubation procedures
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 method enhances the accuracy and reliability of assay results by allowing precise localization of functional moieties on substrates, maintaining their integrity during washing, and facilitating multivalent interactions with binding molecules, thereby improving the detection of binding molecules in diagnostic tests.
Implementation Method 1
propelling droplets of a dispersion of a synthetic construct of the structure F-S-L from a plurality of orifices located in a monolithic print head onto the surface of a substrate
Implementation Method 2
L is a diacyl- or dialkyl lipid
Data Source
AI summary
Method of localizing cells to at least one discrete area on a surface of a substrate by propelling droplets of an aqueous dispersion of a synthetic construct of the structure F-S-L from a plurality of orifices located in a print head of an inkjet printer onto the surface. In the structure F-S-L, F is a functional moiety capable of associating with the cells by direct or indirect non-covalent interaction with biotin or an epitope of an antigen presented at the surface of the cells, S is a spacer selected to provide a construct that is dispersible in water at a temperature of 25° C. in the absence of organic solvents or detergents, and L is a diacyl- or dialkyl lipid.