| Estrogen receptors alpha and beta mediate contribution of bone marrow-derived endothelial progenitor cells to functional recovery after myocardial infarction. | |
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MedLine Citation:
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PMID: 17088460 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Estradiol (E2) modulates the kinetics of circulating endothelial progenitor cells (EPCs) and favorably affects neovascularization after ischemic injury. However, the roles of estrogen receptors alpha (ER alpha) and beta (ER beta) in EPC biology are largely unknown. METHODS AND RESULTS: In response to E2, migration, tube formation, adhesion, and estrogen-responsive element-dependent gene transcription activities were severely impaired in EPCs obtained from ER alpha-knockout mice (ER alphaKO) and moderately impaired in ER betaKO EPCs. The number of ER alphaKO EPCs (42.4+/-1.5; P<0.001) and ER betaKO EPCs (55.4+/-1.8; P=0.03) incorporated into the ischemic border zone was reduced as compared with wild-type (WT) EPCs (72.5+/-1.3). In bone marrow transplantation (BMT) models, the number of mobilized endogenous EPCs in E2-treated mice was significantly reduced in ER alphaKO BMT (WT mice transplanted with ER alphaKO bone marrow) (2.03+/-0.18%; P=0.004 versus WT BMT) and ER betaKO BMT (2.62+/-0.07%; P=0.02 versus WT) compared with WT BMT (2.87+/-0.13%) (WT to WT BMT as control) mice. Capillary density at the border zone of ischemic myocardium also was significantly reduced in ER alphaKO BMT and ER betaKO BMT compared with WT mice (WT BMT, 1718+/-75/mm2; ER alphaKO BMT, 1107+/-48/mm2; ER betaKO BMT, 1567+/-50/mm2). ER alpha mRNA was expressed more abundantly on EPCs compared with ER beta. Moreover, vascular endothelial growth factor was significantly downregulated on ER alphaKO EPCs compared with WT EPCs both in vitro and in vivo. CONCLUSIONS: Both ER alpha and ER beta contribute to E2-mediated EPC activation and tissue incorporation and to preservation of cardiac function after myocardial infarction. ER alpha plays a more prominent role in this process. Moreover, ER alpha contributes to upregulation of vascular endothelial growth factor, revealing possible mechanisms of an effect of E2 on EPC biology. Finally, these data provide additional evidence of the importance of bone marrow-derived EPC phenotype in ischemic tissue repair. |
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Authors:
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Hiromichi Hamada; Myeong Kon Kim; Atsushi Iwakura; Masaaki Ii; Tina Thorne; Gangjian Qin; Jun Asai; Yoshiaki Tsutsumi; Haruki Sekiguchi; Marcy Silver; Andrea Wecker; Evelyn Bord; Yan Zhu; Raj Kishore; Douglas W Losordo |
Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2006-11-06 |
Journal Detail:
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Title: Circulation Volume: 114 ISSN: 1524-4539 ISO Abbreviation: Circulation Publication Date: 2006 Nov |
Date Detail:
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Created Date: 2006-11-22 Completed Date: 2006-12-14 Revised Date: 2007-12-03 |
Medline Journal Info:
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Nlm Unique ID: 0147763 Medline TA: Circulation Country: United States |
Other Details:
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Languages: eng Pagination: 2261-70 Citation Subset: AIM; IM |
Affiliation:
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Division of Cardiovascular Research, St Elizabeth Medical Center of Boston, Tufts University School of Medicine, Boston, Mass, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Bone Marrow Cells / cytology* Cardiotonic Agents / pharmacology Cell Differentiation Cells, Cultured Endothelial Cells / cytology Estradiol / metabolism, pharmacology Estrogen Receptor alpha / deficiency, metabolism* Estrogen Receptor beta / deficiency, metabolism* Female Heart / physiopathology* Hematopoietic Stem Cell Mobilization Mice Mice, Inbred C57BL Mice, Knockout Myocardial Infarction / physiopathology*, surgery* Recovery of Function Stem Cell Transplantation* Stem Cells / cytology, drug effects, metabolism, physiology Up-Regulation Vascular Endothelial Growth Factor A / metabolism |
| Grant Support | |
ID/Acronym/Agency:
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HL-53354/HL/NHLBI NIH HHS; HL-57516/HL/NHLBI NIH HHS; HL-63414/HL/NHLBI NIH HHS; HL-77428/HL/NHLBI NIH HHS; HL-80137/HL/NHLBI NIH HHS; P01-HL-66957/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Cardiotonic Agents; 0/Estrogen Receptor alpha; 0/Estrogen Receptor beta; 0/Vascular Endothelial Growth Factor A; 50-28-2/Estradiol |
| Comments/Corrections | |
Comment In:
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Circulation. 2006 Nov 21;114(21):2203-5
[PMID:
17116779
]
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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