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2018 ; 8
(1
): 10780
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Enhancement of collagen deposition and cross-linking by coupling lysyl oxidase
with bone morphogenetic protein-1 and its application in tissue engineering
#MMPMID30018337
Rosell-Garcia T
; Rodriguez-Pascual F
Sci Rep
2018[Jul]; 8
(1
): 10780
PMID30018337
show ga
Cultured cell-derived extracellular matrices (ECM)-based biomaterials exploit the
inherent capacity of cells to create highly sophisticated supramolecular
assemblies. However, standard cell culture conditions are far from ideal given
the fact that the diluted microenvironment does not favor the production of ECM
components, a circumstance particularly relevant for collagen. An incomplete
conversion of procollagen by C-proteinase/bone morphogenetic protein 1 (BMP1) has
been proposed to severely limit in vitro collagen deposition. BMP1 also catalyzes
the proteolytic activation of the precursor of the collagen cross-linking enzyme,
lysyl oxidase (LOX) to yield the active form, suggesting a deficit in
cross-linking activity under standard conditions. We hypothesized that the
implementation of fibroblast cultures with LOX and BMP1 may be an effective way
to increase collagen deposition. To test it, we have generated stable cell lines
overexpressing LOX and BMP1 and studied the effect of supernatants enriched in
LOX and BMP1 on collagen synthesis and deposition from fibroblasts. Herein, we
demonstrate that the supplementation with LOX and BMP1 strongly increased the
deposition of collagen onto the insoluble matrix at the expense of the soluble
fraction in the extracellular medium. Using decellularization protocols, we also
show that fibroblast-derived matrices regulate adipogenic and osteogenic
differentiation of human mesenchymal stem cells (MSC), and this effect was
modulated by LOX/BMP1. Collectively, these data demonstrate that we have
developed a convenient protocol to enhance the capacity of in vitro cell cultures
to deposit collagen in the ECM, representing this approach a promising technology
for application in tissue engineering.