Furfuryl Copolymer Coating for Cell Adhesion on Polymer Substrates

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Solution Overview

Problem

Current cell culture substrates, particularly hydrophilic polymer substrates used in bioreactors, face challenges in achieving optimal cell adhesion, as existing surface treatments like PTHFA do not fully enhance cell attachment and proliferation, especially in complex or porous structures.

Innovation Solution

A copolymer containing a structural unit derived from furfuryl (meth)acrylate and an ethylenically unsaturated monomer with a carboxylic group is applied to the surface of polymer substrates, forming a coating layer with a specific molar ratio, which improves cell adhesion and proliferation by creating a suitable hydrophobicity and promoting protein adsorption and cellular signaling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If plasma treatment is performed on conventional plastic or glass vessels, then cell adhesion is improved, but the treatment cannot be applied to complex or porous structures

Engineering Contradiction:

Improvecell adhesionVSAvoidapplicability to complex structures

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent replaces the physical plasma treatment method with a chemical coating method using copolymer. The copolymer coating can be applied to complex and porous structures through immersion or spraying, overcoming the limitation of plasma treatment which cannot penetrate complex geometries. This substitution enables universal application across all substrate types while maintaining excellent cell adhesion.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the surface chemistry parameters of the polymer substrate by coating with a copolymer containing specific functional groups (carboxyl, hydroxyl, amine). This chemical modification creates a bioactive surface that promotes cell adhesion without requiring physical treatment methods, thus solving the contradiction between treatment effectiveness and structural adaptability.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If surface treatment with cell adhesion factors like platelet lysate or fibronectin is performed on hollow fiber membrane, then cell adhesion is improved, but the treatment cost increases

Engineering Contradiction:

Improvecell adhesionVSAvoidcost

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent uses a cost-effective copolymer coating material that can be applied at low cost compared to expensive cell adhesion factors like platelet lysate or fibronectin. The copolymer provides sufficient cell adhesion promotion without requiring costly biological materials, making the solution economically viable while maintaining biological effectiveness.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent employs a composite copolymer material combining multiple functional units (furfuryl acrylate, carboxyethyl acrylate, and other monomers) to achieve enhanced cell adhesion properties. This composite approach creates a synergistic effect that provides better cell adhesion than single-component treatments, while the synthetic nature of the material keeps costs lower than biological alternatives.

Inventive Principle:

Principle #40Composite materials

3Productivity

If hydrophilic polymer substrate is used for culture medium replacement, then medium exchange is improved, but cell adhesion is insufficient

Engineering Contradiction:

Improveculture medium exchange efficiencyVSAvoidcell adhesion

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies local quality modification by coating only the surface of the hydrophilic polymer substrate with copolymer, while maintaining the bulk hydrophilic properties for medium exchange. The coated surface provides cell adhesion promotion, while the underlying hydrophilic polymer structure preserves efficient culture medium replacement. This dual-function approach resolves the contradiction between adhesion and medium exchange efficiency.

Inventive Principle:

Principle #3Local quality

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 copolymer coating significantly enhances cell adhesion and proliferation on hydrophilic polymer substrates compared to traditional treatments, allowing for better cell growth and expansion, even on complex substrate geometries, while maintaining effective culture medium exchange.

Implementation Method 1

promoting protein adsorption and cellular signaling

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 2

creating a suitable hydrophobicity

Methodology Applied

Scientific EffectHydrophobic interaction: Hydrophobe

Data Source

PatentUS12195708B2Cell culture substrate

Publication Date: 2025.01.14 TERUMO KK

AI summary

To provide a means capable of providing excellent cell adhesion to a polymer substrate (particularly, a hydrophilic polymer substrate) as compared to the case of performing a surface treatment with polytetrahydrofurfuryl acrylate (PTHFA).Provided is a cell culture substrate comprising a coating layer on at least one side of a polymer substrate, wherein the coating layer includes a copolymer having more than 40% by mole and less than 100% by mole of a structural unit derived from furfuryl (meth)acrylate represented by Formula and more than 0% by mole and less than 60% by mole of a structural unit derived from ethylenically unsaturated monomer having a carboxylic group (the total of the structural unit and the structural unit is 100% by mole).