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TitleCell sheet engineering using the stromal vascular fraction of adipose tissue as a vascularization strategy
Author(s)Costa, M.
Cerqueira, Mariana Teixeira
Santos, T. C.
Marques, Belém Sampaio
Ludovico, Paula
Marques, A. P.
Pirraco, Rogério P.
Reis, R. L.
KeywordsCell sheet engineering
Stromal vascular fraction
Adipose tissue
Issue dateJun-2017
PublisherElsevier Ltd.
JournalActa Biomaterialia
CitationCosta M., Cerqueira M. T., Santos T. C., Sampaio-Marques B., Ludovico P., Marques A. P., Pirraco R. P., Reis R. L. Cell sheet engineering using the stromal vascular fraction of adipose tissue as a vascularization strategy, Acta Biomaterialia, Vol. 55, pp. 131-143, doi:10.1016/j.actbio.2017.03.034, 2017
Abstract(s)Current vascularization strategies for Tissue Engineering constructs, in particular cell sheet-based, are limited by time-consuming and expensive endothelial cell isolation and/or by the complexity of using extrinsic growth factors. Herein, we propose an alternative strategy using angiogenic cell sheets (CS) obtained from the stromal vascular fraction (SVF) of adipose tissue that can be incorporated into more complex constructs. Cells from the SVF were cultured in normoxic and hypoxic conditions for up to 8 days in the absence of extrinsic growth factors. Immunocytochemistry against CD31 and CD146 revealed spontaneous organization in capillary-like structures, more complex after hypoxic conditioning. Inhibition of HIF-1α pathway hindered capillary-like structure formation in SVF cells cultured in hypoxia, suggesting a role of HIF-1α. Moreover, hypoxic SVF cells showed a trend for increased secretion of angiogenic factors, which was reflected in increased network formation by endothelial cells cultured on matrigel using that conditioned medium. In vivo implantation of SVF CS in a mouse hind limb ischemia model revealed that hypoxia-conditioned CS led to improved restoration of blood flow. Both in vitro and in vivo data suggest that SVF CS can be used as simple and cost-efficient tools to promote functional vascularization of TE constructs.
AccessRestricted access (UMinho)
Appears in Collections:3B’s - Artigos em revistas/Papers in scientific journals
ICVS - Artigos em revistas internacionais / Papers in international journals

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