* Injectable Graft Substitute Active on Bone Tissue Regeneration

Tissue Engineering. Part a
Michela BosettiMario Cannas

Abstract

With the aim to obtain an injectable bioactive scaffold that can accelerate bone formation in sinus lift augmentation, in bony void and fracture repair, we have developed a three-dimensional (3D) jelly collagen containing lysophosphatidic acid (LPA) and 1α,25-dihydroxyvitamin D3 (1,25D3). Using an in vitro 3D culture model of bone fracture, we show that the contraction of the collagen gel is mediated by Rho-kinase activation in osteoblasts. The gel contraction showed dependence on cell concentration and was increased by LPA, which favored apposition and fastening of bone fragments approach. LPA was shown to act through actin cytoskeleton reorganization and myosin light chain phosphorylation of human primary osteoblasts (hOB). Moreover, LPA conferred osteoconductive properties as evidenced by the induction of proliferation, differentiation, and migration of hOB. The addition of 1,25D3 did not enhance cell-mediated gel contraction, but stimulated the maturation of hOB in vitro through the production of extracellular matrix of higher quality. On the basis of these observations, the collagen gel enriched with LPA and 1,25D3 described herein can be considered an injectable natural scaffold that allows the migration of cells from the...Continue Reading

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Citations

May 24, 2019·Clinical Oral Investigations·Ester Alves Ferreira BordiniDiana Gabriela Soares
Apr 30, 2021·Saudi Journal of Biological Sciences·Archana A GuptaShankargouda Patil

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Methods Mentioned

BETA
electrophoresis
fluorescence microscopy
confocal microscopy

Software Mentioned

Qwin Plus
NIH
Leica
NisElements
Qwin Image Analysis
Qwin Plus V Image
SPSS

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