Amorphous Calcium Polyphosphate Nanoparticles for Bone Regeneration
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Solution Overview
Problem
Current bone graft materials and skin aging treatments face challenges due to the need for high-temperature synthesis, loss of osteoinductive properties, and instability of polyphosphate materials, which limits their effectiveness in bone regeneration and skin health.
Innovation Solution
Development of amorphous calcium polyphosphate nanoparticles with retinol encapsulation, produced at room temperature, exhibiting high hardness and biodegradability, inducing bone formation and collagen expression, suitable for bone regeneration and dermatological applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional high-temperature synthesis methods are used to produce calcium phosphate bone graft materials, then the material achieves sufficient structural stability, but the osteoinductive properties are lost and the material becomes less biocompatible
Solution Approach 1:
The patent changes the synthesis temperature parameter from conventional high temperatures (>700°C) to room temperature conditions. This parameter change enables the production of amorphous calcium polyphosphate nanoparticles that retain osteoinductive properties while achieving sufficient structural stability through controlled nanoparticle formation and amorphous structure stabilization.
Solution Approach 2:
The patent creates a composite material system combining calcium polyphosphate with amorphous nanoparticle structure. This composite approach integrates the osteoinductive properties of polyphosphate with the structural stability of controlled amorphous calcium phosphate nanoparticles, achieving both desired properties simultaneously.
2Stability of the object's composition
If polyphosphate materials are subjected to calcination processes to improve stability, then the material becomes more resistant, but the polyphosphate chains are degraded and transformed into crystalline state losing morphogenetic activity
Solution Approach 1:
The patent eliminates the calcination step by changing the synthesis conditions to room temperature. This prevents the thermal degradation of polyphosphate chains and avoids crystalline transformation, thereby preserving the morphogenetic activity of the polyphosphate while achieving stability through controlled amorphous nanoparticle formation.
Solution Approach 2:
The patent uses a mild, aqueous-based synthesis approach that does not require expensive high-temperature equipment or complex calcination processes. The room temperature synthesis method is simpler and more accessible, producing stable amorphous nanoparticles without the need for aggressive thermal treatment.
3Productivity
If retinol is applied alone for skin regeneration, then collagen synthesis is stimulated, but at high concentrations it may display adverse effects
Solution Approach 1:
The patent combines retinol with amorphous calcium polyphosphate nanoparticles into a single composite formulation. This merging allows retinol to be delivered at lower concentrations while maintaining high collagen synthesis effectiveness, as the polyphosphate nanoparticles provide additional osteoinductive and collagen-stimulating properties that synergize with retinol.
Solution Approach 2:
The amorphous calcium polyphosphate nanoparticles act as an intermediary carrier for retinol delivery. The nanoparticles provide a controlled release mechanism and enhance the bioavailability of retinol, allowing lower doses to achieve the desired collagen synthesis effect while reducing the risk of adverse effects associated with high concentrations.
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 amorphous calcium polyphosphate nanoparticles with retinol show enhanced osteoinductive and collagen-inducing properties, offering a superior alternative to conventional materials for bone repair and skin health, with improved biocompatibility and safety profiles.
Implementation Method 1
the inventive non-crystalline and biodegradable material that is produced under mild conditions, at room temperature, is morphogenetically active and preferably induces bone formation and the expression of the marker gene for osteoblast activity, alkaline phosphatase
Implementation Method 2
human osteoblast-like cells contain enzymes that hydrolyze polyP, e.g. the alkaline phosphatase (ALP)
Implementation Method 3
the retinol/aCa-polyP-NS, cause collagen type III expression in an unexpected high extent
Implementation Method 4
The nanospheres according to this invention are highly homogenous in size (size ∼45 nm). This size is optimal for endocytotic cellular uptake
Data Source
AI summary
This invention concerns a calcium polyphosphate material consisting of amorphous nanoparticles with a diameter of approximately between about 45 nm to about 0.25 μιη that displays a considerable hardness (elastic modulus) of about 1.3 GPa. The inventive noncrystalline and biodegradable material that is produced under mild conditions, at room temperature, is morphogenetically active and preferably induces bone formation and the expression of the marker gene for osteoblast activity, alkaline phosphatase. In a preferred aspect, the invention concerns a method for producing amorphous retinol/calcium- polyphosphate nanospheres (retinol/aCa-polyP-NS) that show several unexpected properties and can be used in the treatment or prophylaxis of a variety of dermatological conditions, including photoaging.