{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,13]],"date-time":"2026-02-13T15:50:08Z","timestamp":1770997808101,"version":"3.50.1"},"reference-count":55,"publisher":"Proceedings of the National Academy of Sciences","issue":"38","content-domain":{"domain":["www.pnas.org"],"crossmark-restriction":true},"short-container-title":["Proc. Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2008,9,23]]},"abstract":"<jats:p>\n            Cell-based therapies are attractive for revascularizing and regenerating tissues and organs, but clinical trials of endothelial progenitor cell transplantation have not resulted in consistent benefit. We propose a different approach in which a material delivery system is used to create a depot of vascular progenitor cells\n            <jats:italic>in vivo<\/jats:italic>\n            that exit over time to repopulate the damaged tissue and participate in regeneration of a vascular network. Microenvironmental conditions sufficient to maintain the viability and outward migration of outgrowth endothelial cells (OECs) have been delineated, and a material incorporating these signals improved engraftment of transplanted cells in ischemic murine hindlimb musculature, and increased blood vessel densities from 260 to 670 vessels per mm\n            <jats:sup>2<\/jats:sup>\n            , compared with direct cell injection. Further, material deployment dramatically improved the efficacy of these cells in salvaging ischemic murine limbs, whereas bolus OEC delivery was ineffective in preventing toe necrosis and foot loss. Finally, material deployment of a combination of OECs with another cell population commonly isolated from peripheral or cord blood, endothelial progenitor cells (EPCs) returned perfusion to normal levels in 40 days, and prevented toe and foot necrosis. Direct injection of an EPC\/OEC combination was minimally effective in improving limb perfusion, and untreated limbs underwent autoamputation in 3 days. These results demonstrate that vascular progenitor cell utility is highly dependent on the mode of delivery, and suggest that one can create new vascular beds for a variety of applications with this material-controlled deployment of cells.\n          <\/jats:p>","DOI":"10.1073\/pnas.0803873105","type":"journal-article","created":{"date-parts":[[2008,9,16]],"date-time":"2008-09-16T01:39:29Z","timestamp":1221529169000},"page":"14347-14352","update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":191,"title":["Material-based deployment enhances efficacy of endothelial progenitor cells"],"prefix":"10.1073","volume":"105","author":[{"given":"Eduardo A.","family":"Silva","sequence":"first","affiliation":[{"name":"*School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02139;"},{"name":"Faculdade de Engenharia, Universidade do Porto, 4099\u2013002 Porto, Portugal;"}]},{"given":"Eun-Suk","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Dentistry, College of Medicine, Chungnam National University, Daejon 301-747, Korea; and"}]},{"given":"Hyun Joon","family":"Kong","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering, Institute for Genomic Biology, University of Illinois, Urbana, IL 61801"}]},{"given":"David J.","family":"Mooney","sequence":"additional","affiliation":[{"name":"*School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02139;"}]}],"member":"341","published-online":{"date-parts":[[2008,9,23]]},"reference":[{"key":"e_1_3_3_1_2","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMra052638"},{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.304.5668.192"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature04961"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa051779"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa055706"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1161\/CIRCULATIONAHA.104.526749"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.1152\/ajpheart.00343.2004"},{"key":"e_1_3_3_8_2","unstructured":"Clinical Trials. 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