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Expansion and osteogenic differentiation of bone marrow-derived mesenchymal stem cells on a vitamin C functionalized polymer.

Abstract：

:In human body ascorbic acid plays an essential role in the synthesis and function of skeletal tissues and immune system factors. Ascorbic acid is also a major physiological antioxidant, repairing oxidatively damaged biomolecules, preventing the formation of excessive reactive oxygen species or scavenging these species. We recently reported the synthesis of ascorbic acid-functionalized polymers in which the antioxidant features of the pendant ascorbic acid groups was preserved. In the present work we demonstrate that ascorbic acid-functionalized poly(methyl methacrylate) (AA-PMMA) can modulate the proliferation and osteogenic differentiation of early and late-passage bone marrow-derived human mesenchymal stem cells (MSCs). The covalently coupled ascorbic acid impacted MSCs differently than when ascorbic acid was presented to the cells in soluble form. At optimal concentration, the covalently coupled ascorbic acid and soluble ascorbic acid synergistically promoted and retained the ability of MSCs to respond to osteogenic stimulation over extensive cell expansions in vitro. In the presence of soluble ascorbic acid, AA-PMMA films prepared at optimal concentrations (0.1 mg/ml in the present study) showed a significant promotive effect over other concentrations and tissue culture plastic (TCP) with respect to osteogenic differentiation of both EP (young) and LP (old) MSCs. These results suggest that the coupled ascorbic acid is acting mainly at the extracellular level and, at optimal concentrations, the immobilized extracellular ascorbic acid and soluble ascorbic acid synergistically promote osteogenic differentiation of MSCs. Importantly, the covalently coupled ascorbic acid on the films of optimal concentration was able to preserve the capacity of MSCs to undergo osteogenic differentiation in vitro. These results suggest an important role for functionalized biomaterials with antioxidant features in control of cell physiology and cell aging phenomena.

journal_name

Biomaterials

journal_title

Biomaterials

authors

Wang Y,Singh A,Xu P,Pindrus MA,Blasioli DJ,Kaplan DL

doi

10.1016/j.biomaterials.2006.01.036

keywords:

subject

Has Abstract

pub_date

2006-06-01 00:00:00

pages

3265-73

issue

17

eissn

0142-9612

issn

1878-5905

pii

S0142-9612(06)00101-3

journal_volume

27

pub_type

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