Decellularized ECM Coating for Tissue Integration

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Solution Overview

Problem

Current implant coatings with homogeneous proteins like collagen I and fibronectin, while promoting bone formation, lack the complex natural substrate that decellularized extracellular matrix (ECM) provides, leading to limitations in cellular adhesion, viability, and tissue integration, particularly in patients with collagen allergies.

Innovation Solution

A method of producing decellularized extracellular matrix (DM) by growing mesenchymal stem cells on tissue culture substrates, removing cells, and dissociating the ECM into a solution, which is then applied to biomaterials to enhance tissue formation and integration by providing a natural cell-derived surface coating.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If homogeneous proteins (collagen I, fibronectin) are used for implant coating, then bone formation is increased, but cellular adhesion, viability, and tissue integration are limited due to lack of complex natural substrate

Engineering Contradiction:

Improvebone formationVSAvoidcellular adhesion and viability

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent applies composite materials by combining multiple protein components (collagen I, fibronectin, vitronectin, laminin, elastin) and polysaccharides (glycosaminoglycans, proteoglycans) to create a complex extracellular matrix coating that provides both structural support and biological activity, resolving the contradiction between bone formation and cellular adhesion

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent applies local quality by providing different protein and polysaccharide components at specific locations within the extracellular matrix structure, where each component serves a specialized function - for example, collagens provide structural framework while glycosaminoglycans provide hydration and shock absorption, thereby optimizing both bone formation and cellular interactions

Inventive Principle:

Principle #3Local quality

2Strength

If collagen-based coatings are used, then bone formation is promoted, but immunogenicity and allergy concerns arise in patients with collagen allergies

Engineering Contradiction:

Improvebone formationVSAvoidimmunogenicity and allergy

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent applies parameter changes by modifying the chemical composition parameters of the coating to include not only collagen but also fibronectin, vitronectin, laminin, and various polysaccharides, thereby changing the immunological profile to reduce allergenicity while maintaining bone formation capabilities

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies intermediary by using decellularized extracellular matrix as a mediator that provides natural cell-derived surface coating without the immunogenicity of pure collagen, serving as a bridge between the implant surface and host tissue while reducing immune response

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If decellularized extracellular matrix is used, then cellular adhesion and tissue integration are enhanced, but production complexity increases compared to simple protein coatings

Engineering Contradiction:

Improvecellular adhesion and tissue integrationVSAvoidproduction process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies taking out by extracting and isolating specific protein and polysaccharide components from the decellularized extracellular matrix through controlled enzymatic and chemical treatments, thereby simplifying the production process while maintaining the complex functional properties needed for cellular adhesion and tissue integration

Inventive Principle:

Principle #2Taking out (Extraction)

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 DM coating accelerates tissue formation, improves biomaterial integration, and addresses immunogenic concerns by offering a patient-friendly, immunologically neutral surface for tissue regeneration.

Implementation Method 1

This matrix is produced by cells, for example, MSCs derived from any tissue compartment (e.g., bone marrow, adipose tissue, muscle, dental pulp, etc.) on, e.g., tissue culture plastic (TCP) under controlled conditions

Methodology Applied

Scientific EffectCell secretion:

Implementation Method 2

The result is then decellularized and removed from the TCP, resulting in a composition of the cell-secreted components without the antigenic cellular structures or contaminating DNA

Methodology Applied

Scientific EffectDNase treatment: Enzyme

Implementation Method 3

The application and implantation of this decellularized extracellular matrix to supports accelerates tissue formation in a natural manner

Methodology Applied

Scientific EffectTissue formation:

Implementation Method 4

the deposition of the complex array of proteins and polysaccharides included in the endogeneous cell-secreted ECM provides cells with a natural substrate for interaction, thereby enhancing cellular adhesion, viability, survival, and tissue formation

Methodology Applied

Scientific EffectCellular adhesion: Adhesive

Data Source

PatentUS9623051B2Decellularized extracellular matrix

Publication Date: 2017.04.18 RGT UNIV OF CALIFORNIA

AI summary

Methods for producing compositions of decellularized extracellular matrix (DM) tissue culture are described. The compositions can be used for coating supports such as tissue culture substrates, osteogenic gels, and medical devices.