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PEG hydrogel containing calcium-releasing particles and mesenchymal stromal cells promote vessel maturation.

Abstract：

:The use of human mesenchymal stromal cells (hMSC) for treating diseased tissues with poor vascularization has received significant attention, but low cell survival has hampered its translation to the clinic. Bioglasses and glass-ceramics have also been suggested as therapeutic agents for stimulating angiogenesis in soft tissues, but these effects need further evaluation in vivo. In this study, calcium-releasing particles and hMSC were combined within a hydrogel to examine their vasculogenic potential in vitro and in vivo. The particles provided sustained calcium release and showed proangiogenic stimulation in a chorioallantoic membrane (CAM) assay. The number of hMSC encapsulated in a degradable RGD-functionalized PEG hydrogel containing particles remained constant over time and IGF-1 release was increased. When implanted in the epidydimal fat pad of immunocompromised mice, this composite material improved cell survival and stimulated vessel formation and maturation. Thus, the combination of hMSC and calcium-releasing glass-ceramics represents a new strategy to achieve vessel stabilization, a key factor in the revascularization of ischemic tissues. STATEMENT OF SIGNIFICANCE:Increasing blood vessel formation in diseased tissues with poor vascularization is a current clinical challenge. Cell therapy using human mesenchymal stem cells has received considerable interest, but low cell survival has hampered its translation to the clinic. Bioglasses and glass-ceramics have been explored as therapeutic agents for stimulating angiogenesis in soft tissues, but these effects need further evaluation in vivo. By incorporating both human mesenchymal stem cells and glass-ceramic particles in an implantable hydrogel, this study provides insights into the vasculogenic potential in soft tissues of the combined strategies. Enhancement of vessel formation and maturation supports further investigation of this strategy.

journal_name

Acta Biomater

journal_title

Acta biomaterialia

authors

Navarro-Requena C,Weaver JD,Clark AY,Clift DA,Pérez-Amodio S,Castaño Ó,Zhou DW,García AJ,Engel E

doi

10.1016/j.actbio.2017.12.009

subject

Has Abstract

pub_date

2018-02-01 00:00:00

pages

53-65

eissn

1742-7061

issn

1878-7568

pii

S1742-7061(17)30765-1

journal_volume

67

pub_type

杂志文章

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