Collagen Glycosaminoglycan Scaffold with Osteoprotegerin for Bone Regeneration

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Solution Overview

Problem

Current bone regenerative strategies face challenges in coordinating bone formation and resorption, necessitating compositions that serve as templates for bone growth while minimizing bone resorption for treating trauma or congenital deformities.

Innovation Solution

Compositions comprising a collagen glycosaminoglycan scaffold combined with osteoprotegerin (OPG) or its fragments are administered to promote osteogenesis, attenuate bone resorption, inhibit osteoclastogenesis, and inhibit osteoclast activation, thereby regulating bone homeostasis.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a collagen glycosaminoglycan scaffold is used as a template for bone growth, then bone formation is promoted, but bone resorption increases

Engineering Contradiction:

Improvebone formation rateVSAvoidbone resorption

Core Design Contradiction:

ProductivityVSLoss of substance

Solution Approach 1:

Osteoprotegerin (OPG) serves as a mediator that binds to RANKL, preventing it from activating osteoclasts. This intermediary action blocks the resorptive pathway while allowing the scaffold to continue promoting bone formation, thus resolving the contradiction between bone formation promotion and bone resorption control

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention combines collagen glycosaminoglycan scaffold material with osteoprotegerin protein to create a composite composition. The scaffold provides structural template for bone growth while OPG provides biochemical control over osteoclast activity, achieving both bone formation promotion and resorption inhibition simultaneously

Inventive Principle:

Principle #40Composite materials

2Stability of the object's composition

If osteoclast activity is increased to remove old bone, then bone remodeling is enhanced, but excessive resorption occurs

Engineering Contradiction:

Improvebone remodelingVSAvoidbone resorption

Core Design Contradiction:

Stability of the object's compositionVSLoss of substance

Solution Approach 1:

Osteoprotegerin provides negative feedback control over osteoclast activity by continuously binding available RANKL. This feedback mechanism ensures that osteoclasts are activated only when necessary for normal remodeling, preventing excessive resorption while maintaining healthy bone turnover

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

OPG is incorporated into the scaffold beforehand to preemptively counteract RANKL signaling. This preliminary anti-action prevents osteoclast activation before excessive resorption can occur, allowing controlled remodeling without net bone loss

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS20210052771A1Nanoparticulate mineralized collagen glycosaminoglycan scaffold with an Anti-resorption factor

Publication Date: 2021.02.25 THE UNITED STATES OF AMERICA AS REPRESENTED BY THE DEPT OF VETERANS AFFAIRS

AI summary

Compositions including a collagen glycosaminoglycan scaffold and osteoprotegerin are described. The compositions are useful in methods for promoting osteogenesis and attenuating bone resorption.