NDLI: Abundant progenitor cells in the adventitia contribute to atherosclerosis of vein grafts in ApoE-deficient mice

Content Provider	PubMed Central
Author	Hu, Yanhua Zhang, Zhongyi Torsney, Evelyn Afzal, Ali R. Davison, Fergus Metzler, Bernhard Xu, Qingbo
Copyright Year	2004
Abstract	Recent evidence indicates that vascular progenitor cells may be the source of smooth muscle cells (SMCs) that accumulate in atherosclerotic lesions, but the origin of these progenitor cells is unknown. To explore the possibility of vascular progenitor cells existing in adults, a variety of tissues from ApoE-deficient mice were extensively examined. Immunohistochemical staining revealed that the adventitia in aortic roots harbored large numbers of cells having stem cell markers, e.g., Sca-1+ (21%), c-kit+ (9%), CD34+ (15%), and Flk1+ cells (4%), but not SSEA-1+ embryonic stem cells. Explanted cultures of adventitial tissues using stem cell medium displayed a heterogeneous outgrowth, for example, islands of round-shaped cells surrounded by fibroblast-like cell monolayers. Isolated Sca-1+ cells were able to differentiate into SMCs in response to PDGF-BB stimulation in vitro. When Sca-1+ cells carrying the LacZ gene were transferred to the adventitial side of vein grafts in ApoE-deficient mice, β-gal+ cells were found in atherosclerotic lesions of the intima, and these cells enhanced the development of the lesions. Thus, a large population of vascular progenitor cells existing in the adventitia can differentiate into SMCs that contribute to atherosclerosis. Our findings indicate that ex vivo expansion of these progenitor cells may have implications for cellular, genetic, and tissue engineering approaches to vascular disease.
Related Links	http://dx.doi.org/10.1172/jci19628
Ending Page	1265
Page Count	8
Starting Page	1258
File Format	PDF
ISSN	00219738
Journal	Journal of Clinical Investigation
Issue Number	9
Volume Number	113
Language	English
Publisher	American Society for Clinical Investigation
Publisher Date	2004-05-01
Access Restriction	Open
Rights Holder	American Society for Clinical Investigation
Subject Keyword	Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Medicine

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