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Scaffold Composition Determines the Angiogenic Outcome of Cell‐Based Vascular Endothelial Growth Factor Expression by Modulating Its Microenvironmental Distribution
Author(s) -
Gaudiello Emanuele,
Melly Ludovic,
Cerino Giulia,
Boccardo Stefano,
JaliliFiroozinezhad Sasan,
Xu Lifen,
Eckstein Friedrich,
Martin Ivan,
Kaufmann Beat A.,
Banfi Andrea,
Marsano Anna
Publication year - 2017
Publication title -
advanced healthcare materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.288
H-Index - 90
eISSN - 2192-2659
pISSN - 2192-2640
DOI - 10.1002/adhm.201700600
Subject(s) - angiogenesis , stromal cell , extracellular matrix , microbiology and biotechnology , vascular endothelial growth factor , therapeutic angiogenesis , population , scaffold , cell , growth factor , neovascularization , biology , cancer research , chemistry , vegf receptors , biomedical engineering , medicine , biochemistry , receptor , environmental health
Delivery of genetically modified cells overexpressing Vascular Endothelial Growth Factor (VEGF) is a promising approach to induce therapeutic angiogenesis in ischemic tissues. The effect of the protein is strictly modulated by its interaction with the components of the extracellular matrix. Its therapeutic potential depends on a sustained but controlled release at the microenvironmental level in order to avoid the formation of abnormal blood vessels. In this study, it is hypothesized that the composition of the scaffold plays a key role in modulating the binding, hence the therapeutic effect, of the VEGF released by 3D‐cell constructs. It is found that collagen sponges, which poorly bind VEGF, prevent the formation of localized hot spots of excessive concentration, therefore, precluding the development of aberrant angiogenesis despite uncontrolled expression by a genetically engineered population of adipose tissue‐derived stromal cells. On the contrary, after seeding on VEGF‐binding egg‐white scaffolds, the same cell population caused aberrantly enlarged vascular structures after 14 d. Collagen‐based engineered tissues also induced a safe and efficient angiogenesis in both the patch itself and the underlying myocardium in rat models. These findings open new perspectives on the control and the delivery of proangiogenic stimuli, and are fundamental for the vascularization of engineered tissues/organs.