Ligand-Functionalized Planar Substrates for High-Throughput Biomolecule Separation
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Solution Overview
Problem
Current chromatographic methods for purifying biomolecules, such as viruses, face bottlenecks in throughput and are limited by diffusion and binding issues, leading to inefficient separation and high economic costs due to the need for large column diameters, which introduce packing challenges and channeling problems.
Innovation Solution
Development of ligand-functionalized porous substrates with grafted photoinitiator and ligand groups, created through a process involving ionizing radiation and UV polymerization, enhancing affinity for neutral or negatively charged biomaterials while allowing positively charged materials to pass through, thereby enabling selective capture and binding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional column techniques are used for chromatographic separation, then separation and purification of biomolecules can be achieved, but throughput is low and bottlenecking occurs in downstream purification
Solution Approach 1:
The patent transitions from conventional column chromatography (one-dimensional flow) to planar chromatographic substrates (two-dimensional flow distribution), enabling parallel processing and significantly increased throughput while maintaining separation efficiency through distributed binding sites across the substrate surface
Solution Approach 2:
The invention employs porous polymeric substrates with controlled pore structures that provide high surface area for ligand immobilization while allowing efficient mass transport of biomolecules, thereby achieving both high throughput and reliable separation/purification performance
2Productivity
If the diameter of the chromatography column is increased to alleviate bottlenecking, then throughput may improve, but packing difficulties and channeling problems increase
Solution Approach 1:
The patent replaces vertical column geometry with horizontal planar substrate geometry, eliminating gravity-dependent packing issues and channeling problems while maintaining high throughput through increased surface area and parallel flow paths
Solution Approach 2:
The invention uses thin film or planar substrate formats that are easier to manufacture with uniform properties compared to large-diameter columns, eliminating packing difficulties while providing sufficient capacity for high-throughput applications
3Reliability
If conventional chromatography is performed, then purification can be achieved, but the dynamic capacity is significantly less than the static capacity due to early breakthrough detection
Solution Approach 1:
The planar substrate format with distributed binding sites across the surface allows more uniform utilization of total capacity, delaying breakthrough and increasing dynamic capacity relative to static capacity compared to conventional column formats where mass transfer limitations cause early breakthrough
4Adaptability or versatility
If polymeric resins are used for separation and purification, then various target compounds can be separated based on different interactions, but affinity for neutral or negatively charged biomaterials is insufficient
Solution Approach 1:
The patent incorporates specific ligand functionalities (such as cationic or zwitterionic groups) at the binding sites on the substrate surface that provide enhanced affinity for neutral or negatively charged biomaterials, while the bulk polymeric matrix maintains versatility for different separation mechanisms
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 ligand-functionalized substrates improve the efficiency of biomolecule separation by enhancing affinity and throughput, reducing pressure drops, and maintaining mechanical stability, thus overcoming the limitations of conventional chromatography.
Implementation Method 1
exposing the base substrate to ionizing radiation, preferably e-beam or gamma radiation, to form a first functionalized substrate comprising grafted photoinitiator group attached to the surface or the base substrate
Implementation Method 2
exposing the base substrate comprising grafted photoinitiator groups to UV radiation to polymerize the remaining ethylenically unsaturated, free-radically polymerizable groups
Implementation Method 3
The functionalized substrates are useful in selectively binding and removing biological materials, such as viruses, from biological samples
Data Source
Figure 1
AI summary
Ligand functionalized substrates, methods of making ligand functionalized substrates, and methods of using functionalized substrates are disclosed.