Ligand-Functionalized Substrates for Virus Purification

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Solution Overview

Problem

Current chromatographic methods for capturing and purifying viruses from biological samples face bottlenecks in throughput and efficiency due to limitations in diffusion and binding capacity, leading to high pressure drops and economic challenges with conventional polymeric resins.

Innovation Solution

Development of ligand-functionalized substrates with grafted electrophilic and ionic groups, derived from specific ligand compounds, which enhance binding selectivity for charged biomaterials like viruses, allowing for efficient capture and removal while excluding other proteins.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional column chromatography techniques are used for virus capture and purification, then separation and purification can be achieved, but throughput is low and bottlenecking occurs in downstream purification

Engineering Contradiction:

ImprovethroughputVSAvoidprocessing time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent transitions from conventional one-dimensional column chromatography to two-dimensional chromatography where the ligand-functionalized substrate provides an additional separation dimension. This enables parallel processing and significantly increases throughput by allowing simultaneous separation of multiple components rather than sequential processing through a single column.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The invention employs porous ligand-functionalized substrates that provide high surface area and enhanced mass transfer characteristics. The porous structure allows rapid diffusion of viruses and biomacromolecules throughout the substrate, eliminating the slow diffusion limitations of conventional resins and enabling high-throughput operation without bottlenecking.

Inventive Principle:

Principle #31Porous materials

2Productivity

If the diameter of the chromatography column is increased to alleviate throughput bottlenecks, then throughput may improve, but packing difficulties and channeling problems increase

Engineering Contradiction:

ImprovethroughputVSAvoidcolumn packing

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent utilizes thin-film ligand-functionalized substrates that can be directly integrated into chromatography systems without requiring complex column packing procedures. These flexible thin films eliminate the mechanical handling and packing difficulties associated with large-diameter columns while maintaining high throughput capability through their large surface area and optimized flow characteristics.

Inventive Principle:

Principle #30Flexible shells and thin films

3Reliability

If conventional polymeric resins are used for chromatographic separation, then separation based on various interactions can be achieved, but diffusion limitations and binding capacity constraints reduce efficiency

Engineering Contradiction:

Improveseparation efficiencyVSAvoidprocessing efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The invention creates composite ligand-functionalized substrates that combine the advantages of porous support structures with specifically engineered ligand layers. This composite architecture provides both the mechanical stability needed for reliable operation and the enhanced surface chemistry required for high-capacity, high-speed binding, overcoming the limitations of conventional homogeneous polymeric resins.

Inventive Principle:

Principle #40Composite materials

4Manufacturing precision

If absorption operation is shut down upon breakthrough detection in conventional chromatography, then product purity is maintained, but dynamic capacity is significantly less than static capacity

Engineering Contradiction:

Improveproduct purityVSAvoidresin utilization

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent enables continuous absorption operation by employing ligand-functionalized substrates with such high dynamic binding capacity that breakthrough can be maintained at controlled levels without compromising product purity. The enhanced capacity allows the system to operate continuously at or near maximum efficiency, fully utilizing the resin capability rather than shutting down early as in conventional chromatography.

Inventive Principle:

Principle #20Continuity of useful action

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 significantly improve the binding selectivity and capacity for viruses, enabling high-throughput purification with reduced pressure drops and increased economic viability by selectively capturing target biomaterials while passing non-specific materials.

Implementation Method 1

the functionalized substrates include a base substrate, preferably a porous base substrate, which has been modified to provide grafted ligand groups having the requisite specific binding capacity for binding charged biomaterials, such as viruses

Methodology Applied

Scientific EffectElectrostatic interaction: Electrostatics