Abstract
Hematopoietic stem cells transplantation (HSCT) causes endothelial cell damage, disrupting hematopoietic microenviroment and leading to various complications. We hypothesized that infusion of endothelial progenitor cells (EPCs) may improve endothelium repair, facilitate hematopoietic reconstitution, and alleviate complications associated with HSCT. C57Bl6, and BALB/c mice received total body irradiation followed by infusion of C57Bl6-derived bone marrow (BM) cells, with or without concomitant infusion of C57Bl6-derived EPCs. The time course of hematopoietic and immune reconstitution and the severity of the graft-versus-host disease (GVHD) were monitored. Further, to confirm that EPCs promote endothelial cell recovery, HSCT mice were treated with anti-VE-cadherin antibody targeting the endothelium. The EPCs-treated mice exhibited accelerated recovery of BM vasculature, cellularity, hematopoietic stem and progenitor cell recovery, improved counts of lymphocyte subsets in peripheral blood, and facilitated spleen structure reconstruction. EPCs infusion also ameliorated the GVHD in the C57Bl6 → BALB/c allo-HSCT model. Systemic administration of anti-VE-cadherin antibody significantly delayed hematological and immune reconstitution in the EPCs-infused mice. In conclusion, our data demonstrate that infusion of EPCs augments the hematopoietic and immune reconstitution, and alleviates the GVHD. These findings further highlight the relationship between the microvascular recovery, hematopoietic and immune reconstitution, and the GVHD.
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Acknowledgments
The authors are grateful to Ms. Wenyuan Lin, Xuzhou Medical College, for excellent technical assistance. This work was supported in part by the National Basic Research Program (973), project grant 2009CB522400 (Y.L), and the National Natural Science Foundation of China, grants 30971281 (K.X), 81070446 (L.Z.) and 81000210 (C.C).
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Lingyu Zeng and Chong Chen contributed equally to this study.
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Zeng, L., Chen, C., Song, G. et al. Infusion of Endothelial Progenitor Cells Accelerates Hematopoietic and Immune Reconstitution, and Ameliorates the Graft-Versus-Host Disease After Hematopoietic Stem Cell Transplantation. Cell Biochem Biophys 64, 213–222 (2012). https://doi.org/10.1007/s12013-012-9387-5
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DOI: https://doi.org/10.1007/s12013-012-9387-5