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Liposomes embedded with differentiating factors as a new strategy for enhancing DPSC osteogenic commitment.

M Gallorini, R Di Carlo, S Pilato

¹University "G. d'Annunzio" Chieti-Pescara, 66100, Chieti, Italy.susi.zara@unich.it.

European Cells & Materials

|January 27, 2021

Summary

Liposomes loaded with osteogenic factors accelerate human dental pulp stem cell (DPSC) differentiation into bone cells. This novel Lipo-Mix formulation enhances extracellular matrix deposition and antioxidant responses for tissue engineering applications.

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Isolation, Culture, and Characterization of Dental Pulp Stem Cells from Human Deciduous and Permanent Teeth

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Area of Science:

Biomaterials Science
Stem Cell Biology
Tissue Engineering

Background:

Human dental pulp stem cells (DPSCs) differentiate into osteoblasts with specific media supplements.
Liposomes are versatile carriers for biomolecules and drugs.
Accelerating DPSC osteogenic commitment is crucial for regenerative medicine.

Purpose of the Study:

To investigate liposomes encapsulating osteogenic factors (ascorbic acid, β-glycerophosphate, dexamethasone) for enhanced DPSC differentiation.
To evaluate the effect of liposome-encapsulated factors (Lipo-Mix) on DPSC osteogenic commitment and extracellular matrix deposition.
To assess the impact of Lipo-Mix on cellular redox balance during osteogenesis.

Main Methods:

Liposomes were prepared and characterized for dimensions.
DPSC immunophenotypic profiles (CD90, CD73, CD29) were analyzed after Lipo-Mix exposure.
Alkaline phosphatase activity, Collagen I secretion, and H2O2 levels were measured.
Extracellular matrix deposition and antioxidant responses were evaluated.

Main Results:

Lipo-Mix significantly decreased CD90 and enhanced CD73/CD29 expression, indicating osteogenic commitment.
Increased alkaline phosphatase activity and Collagen I secretion were observed with Lipo-Mix compared to standard medium.
Lipo-Mix reduced H2O2 release and promoted an early antioxidant response, restoring redox balance.
Appreciable extracellular matrix deposition was detected in Lipo-Mix treated cells.

Conclusions:

Liposome-encapsulated osteogenic factors (Lipo-Mix) effectively accelerate DPSC osteogenic commitment.
Lipo-Mix enhances mineralization, extracellular matrix deposition, and antioxidant capacity in DPSCs.
This liposomal formulation shows potential for clinical applications in bone tissue engineering.