Pectin-based injectable biomaterials for bone tissue engineering.

Abstract:

:A variety of natural polymers and proteins are considered to be 3D cell culture structures able to mimic the extracellular matrix (ECM) to promote bone tissue regeneration. Pectin, a natural polysaccharide extracted from the plant cell walls and having a chemical structure similar to alginate, provides interesting properties as artificial ECM. In this work, for the first time, pectin, modified with an RGD-containing oligopeptide or not, is used as an ECM alternative to immobilize cells for bone tissue regeneration. The viability, metabolic activity, morphology, and osteogenic differentiation of immobilized MC3T3-E1 preosteoblats demonstrate the potential of this polysaccharide to keep immobilized cells viable and differentiating. Preosteoblasts immobilized in both types of pectin microspheres maintained a constant viability up to 29 days and were able to differentiate. The grafting of the RGD peptide on pectin backbone induced improved cell adhesion and proliferation within the microspheres. Furthermore, not only did cells grow inside but also they were able to spread out from the microspheres and to organize themselves in 3D structures producing a mineralized extracellular matrix. These promising results suggest that pectin can be proposed as an injectable cell vehicle for bone tissue regeneration.

journal_name

Biomacromolecules

journal_title

Biomacromolecules

authors

Munarin F,Guerreiro SG,Grellier MA,Tanzi MC,Barbosa MA,Petrini P,Granja PL

doi

10.1021/bm101110x

subject

Has Abstract

pub_date

2011-03-14 00:00:00

pages

568-77

issue

3

eissn

1525-7797

issn

1526-4602

journal_volume

12

pub_type

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