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Estrogen receptors alpha and beta mediate contribution of bone marrow-derived endothelial progenitor cells to functional recovery after myocardial infarction.
Circulation. 2006 Nov 21; 114(21):2261-70.Circ

Abstract

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.

Authors+Show Affiliations

Division of Cardiovascular Research, St Elizabeth Medical Center of Boston, Tufts University School of Medicine, Boston, Mass, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

17088460

Citation

Hamada, Hiromichi, et al. "Estrogen Receptors Alpha and Beta Mediate Contribution of Bone Marrow-derived Endothelial Progenitor Cells to Functional Recovery After Myocardial Infarction." Circulation, vol. 114, no. 21, 2006, pp. 2261-70.
Hamada H, Kim MK, Iwakura A, et al. Estrogen receptors alpha and beta mediate contribution of bone marrow-derived endothelial progenitor cells to functional recovery after myocardial infarction. Circulation. 2006;114(21):2261-70.
Hamada, H., Kim, M. K., Iwakura, A., Ii, M., Thorne, T., Qin, G., Asai, J., Tsutsumi, Y., Sekiguchi, H., Silver, M., Wecker, A., Bord, E., Zhu, Y., Kishore, R., & Losordo, D. W. (2006). Estrogen receptors alpha and beta mediate contribution of bone marrow-derived endothelial progenitor cells to functional recovery after myocardial infarction. Circulation, 114(21), 2261-70.
Hamada H, et al. Estrogen Receptors Alpha and Beta Mediate Contribution of Bone Marrow-derived Endothelial Progenitor Cells to Functional Recovery After Myocardial Infarction. Circulation. 2006 Nov 21;114(21):2261-70. PubMed PMID: 17088460.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Estrogen receptors alpha and beta mediate contribution of bone marrow-derived endothelial progenitor cells to functional recovery after myocardial infarction. AU - Hamada,Hiromichi, AU - Kim,Myeong Kon, AU - Iwakura,Atsushi, AU - Ii,Masaaki, AU - Thorne,Tina, AU - Qin,Gangjian, AU - Asai,Jun, AU - Tsutsumi,Yoshiaki, AU - Sekiguchi,Haruki, AU - Silver,Marcy, AU - Wecker,Andrea, AU - Bord,Evelyn, AU - Zhu,Yan, AU - Kishore,Raj, AU - Losordo,Douglas W, Y1 - 2006/11/06/ PY - 2006/11/8/pubmed PY - 2006/12/15/medline PY - 2006/11/8/entrez SP - 2261 EP - 70 JF - Circulation JO - Circulation VL - 114 IS - 21 N2 - 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. SN - 1524-4539 UR - https://www.unboundmedicine.com/medline/citation/17088460/Estrogen_receptors_alpha_and_beta_mediate_contribution_of_bone_marrow_derived_endothelial_progenitor_cells_to_functional_recovery_after_myocardial_infarction_ L2 - https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.106.631465?url_ver=Z39.88-2003&amp;rfr_id=ori:rid:crossref.org&amp;rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -