Abstract：
OBJECTIVE:Endothelial progenitor cells (EPCs) are used for angiogenic therapies or as biomarkers to assess cardiovascular disease risk. However, there is no uniform definition of an EPC, which confounds EPC studies. EPCs are widely described as cells that coexpress the cell-surface antigens CD34, AC133, and vascular endothelial growth factor receptor-2 (VEGFR-2). These antigens are also expressed on primitive hematopoietic progenitor cells (HPCs). Remarkably, despite their original identification, CD34+AC133+VEGFR-2+ cells have never been isolated and simultaneously plated in hematopoietic and endothelial cell (EC) clonogenic assays to assess the identity of their clonal progeny, which are presumably the cellular participants in vascular regeneration. METHODS:CD34+AC133+VEGFR-2+ cells were isolated from human umbilical cord blood (CB) or granulocyte colony-stimulating factor-mobilized peripheral blood and assayed for either EPCs or HPCs. RESULTS:CD34+AC133+VEGFR-2+ cells did not form EPCs and were devoid of vessel forming activity. However, CD34+AC133+VEGFR-2+ cells formed HPCs and expressed the hematopoietic lineage-specific antigen, CD45. We next tested whether EPCs could be separated from HPCs by immunoselection for CD34 and CD45. CD34+CD45+ cells formed HPCs but not EPCs, while CD34+CD45- cells formed EPCs but not HPCs. CONCLUSIONS:Therefore, CD34+AC133+VEGFR-2+ cells are HPCs that do not yield EC progeny, and the biological mechanism for their correlation with cardiovascular disease needs to be reexamined.
journal_name
Exp Hematoljournal_title
Experimental hematologyauthors
Case J,Mead LE,Bessler WK,Prater D,White HA,Saadatzadeh MR,Bhavsar JR,Yoder MC,Haneline LS,Ingram DAdoi
10.1016/j.exphem.2007.04.002subject
Has Abstractpub_date
2007-07-01 00:00:00pages
1109-18issue
7eissn
0301-472Xissn
1873-2399pii
S0301-472X(07)00225-1journal_volume
35pub_type
杂志文章abstract：:Mds1-Evi1 (also known as Prdm3) and Prdm16 are two highly related zinc finger transcription factors that, within the hematopoietic system, are both expressed primarily in hematopoietic stem cells (HSCs). Our laboratory previously found that constitutive Mds1-Evi1 knockout mice are viable, but their HSCs are unable to ...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/j.exphem.2020.04.010
更新日期：2020-05-01 00:00:00
abstract：OBJECTIVE:A complete process for mass generation of megakaryocytes from hematopoietic stem cells under serum-free conditions has great clinical potential for rapid platelet reconstruction in thrombocytopenia patients. We have previously reported on the generation of an optimized serum-free medium (serum-free hematopoie...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/j.exphem.2009.07.012
更新日期：2009-11-01 00:00:00
abstract：:In chronic eosinophilic leukemia, the transforming oncoprotein FIP1L1-PDGFRA is a major target of therapy. In most patients, the tyrosine kinase inhibitor (TKI) imatinib induces complete remission. For patients who are intolerant or resistant, novel TKIs have been proposed. We examined the in vitro effects of 14 kinas...
journal_title：Experimental hematology
pub_type： 临床试验,杂志文章
doi：10.1016/j.exphem.2013.12.007
更新日期：2014-04-01 00:00:00
abstract：:The heat sensitivity at 42 degrees, 43 degrees and 44 degrees C of various hematopoietic subsets in murine bone marrow (MRA, CFU-S-12, CFU-S-8, CFU-GM, BFU-E and CFU-E) was investigated in order to determine whether there is a relationship between heat sensitivity and the position of cells within the stem cell hierarc...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：
更新日期：1993-05-01 00:00:00
abstract：:Stem cell maintenance in continuous bone marrow culture has been shown to be associated with close range interaction between hematopoietic cells and marrow derived adherent cells (MDAC). The extent to which the culture system is dependent upon this type of interaction has not been ascertained. Explants of non-adherent...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：
更新日期：1981-03-01 00:00:00
abstract：OBJECTIVE:We monitored cytokine-secreting cells using an enzyme-linked immunospot (ELISPOT) assay in a prospective study to assess the cytokine network after transplantation. PATIENTS AND METHODS:Peripheral blood mononuclear cells were collected from 23 patients who received allogeneic stem cell transplantation, from ...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/j.exphem.2004.10.009
更新日期：2005-02-01 00:00:00
abstract：OBJECTIVE:All-trans retinoic acid (ATRA) has been used as the first-line therapy for patients with acute promyelocytic leukemia (APL). We previously reported that ATRA increased serum thrombopoietin (TPO) levels accompanied by thrombocytosis during ATRA therapy for APL. In this study, we investigated the mechanism of t...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/j.exphem.2003.10.009
更新日期：2004-01-01 00:00:00
abstract：OBJECTIVE:We previously showed that the organotellurium compound, ammonium trichloro (dioxyethylene-0-0') tellurate (AS101), has antitumoral activity in multiple myeloma (MM) cell lines. Here, we evaluated the antimyeloma activity of AS101 combined with low-dose melphalan, and also examined the activity of AS101 in the...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/j.exphem.2009.01.006
更新日期：2009-05-01 00:00:00
abstract：OBJECTIVES:GPIIb integrin expression has been found on platelets and megakaryocytes, and more recently on immature hematopoietic progenitors. We set out to investigate expression of GPIIb in other hematopoietic cell lineages and, having detected it on mast cells, aimed to determine what possible role it might perform. ...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/j.exphem.2005.01.011
更新日期：2005-04-01 00:00:00
abstract：OBJECTIVE:Monoclonal antibody (mAb) 9C4 detects a surface antigen expressed on immature erythroid progenitor cells and epithelial tumor cell lines. The aim of this study was to identify the recognized surface antigen and to analyze a potential role of this molecule in early steps of erythropoiesis. MATERIALS AND METHO...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/s0301-472x(02)00798-1
更新日期：2002-06-01 00:00:00
abstract：:The processing of inflammatory signals occurs through a variety of mechanisms; the recent descriptions of the tethered ligand receptor for thrombin (JA Hoxie et al., J Biol Chem 268:13756, and TK Vu et al., Cell 64:1057) provide a novel route and mechanism for cellular activation after inflammation and thrombosis. Usi...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：
更新日期：1996-07-01 00:00:00
abstract：:Tumor necrosis factor alpha (TNFalpha) is thought to contribute to the blunted erythropoietin (Epo) production in inflammatory diseases. The present study was carried out to find out as to whether the 55 kD (TNF-RI) or the 75 kD (TNF-RII) receptor is responsible for the TNFalpha-induced inhibition of hepatic Epo synth...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/s0301-472x(98)00054-x
更新日期：1999-02-01 00:00:00
abstract：OBJECTIVE:Our previous study has shown that granulocyte-macrophage colony-stimulating factor (GM-CSF) gene/silica nanoparticles have a leukocytosis effect in normal dogs. Therefore, this study was conducted to determine whether treatment of canine GM-CSF gene/silica nanoparticles has preventive or therapeutic effects i...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/j.exphem.2008.04.002
更新日期：2008-09-01 00:00:00
abstract：:We investigated whether gene transfer into hematopoietic cells could be achieved by direct injection of retroviral vector supernatant into the bone marrow space of newborn sheep. Six sheep (5 weeks old) were injected bilaterally with either 1 mL of G1nBgSvNa8.1 vector supernatant (titer: 1 x 10(7)) in each hip (n = 5)...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/s0301-472x(00)00158-2
更新日期：2000-06-01 00:00:00
abstract：:Infection of splenectomized mice with Diplococcus pneumoniae, type III, resulted in a fourfold higher mortality rate than did infection of normal mice. Splenectomized animals were protected against fulminant, fatal sepsis by subcutaneous transplantation of autochthonous splenic tissue at the time of splenectomy. Anima...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：
更新日期：1978-05-01 00:00:00
abstract：OBJECTIVE:Mechanisms of T-cell stimulation by Flt3 ligand (Flt3L) and granulocyte-macrophage colony-stimulating factor (GM-CSF) remain unclear. Herein, we compared the effects of Flt3L and GM-CSF on the expansion of dendritic cells (DC) and T-cell subsets and cytokine expression. METHODS:Naïve and effector/memory T ce...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/s0301-472x(01)00722-6
更新日期：2001-10-01 00:00:00
abstract：OBJECTIVE:Mesenchymal stem cells (MSC) raise high hopes in clinical applications. However, the lack of common standards and a precise definition of MSC preparations remains a major obstacle in research and application of MSC. Whereas surface antigen markers have failed to precisely define this population, a combination...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/j.exphem.2006.01.002
更新日期：2006-04-01 00:00:00
abstract：:Previous studies have suggested that in vivo granulocyte colony-stimulating factor (G-CSF) pharmacokinetics may change over time. We studied three patients treated with high-dose chemotherapy followed by autologous bone marrow transplantation (ABMT) for metastatic breast cancer after intravenous administration of reco...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：
更新日期：1997-12-01 00:00:00
abstract：:We established a clonal cell culture system for human natural killer (NK) cells from fetal thymocytes. Thymocytes of 16 to 22 gestational weeks were cultured in methylcellulose in the presence of interleukin (IL)-7, IL-15, and steel factor (SF). After 14 days in incubation, large, diffuse colonies consisting of small ...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/s0301-472x(99)00005-3
更新日期：1999-04-01 00:00:00
abstract：OBJECTIVE:To assess the contribution of bone marrow (BM)-derived endothelial progenitor cells (EPCs) to the neovascularisation of cutaneous incisional wounds. METHODS:Lethally irradiated C57Bl/6 mice were transplanted with BM mononuclear cells from Tie2/lacZ mice, which constitutively overexpressed beta-galactosidase ...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/j.exphem.2006.10.016
更新日期：2007-03-01 00:00:00
abstract：:Initiation of DNA synthesis by recombinant colony-stimulating factors (CSFs) was assessed in normal human marrow blast cells isolated by expression of CD34 antigen (tritiated thymidine incorporation). Continuous exposure to CSF was required. A mild increase in DNA synthesis was initiated by granulocyte CSF (G-CSF; gre...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：
更新日期：1991-09-01 00:00:00
abstract：:The megakaryocytopoiesis in rats was studied following a single dose of thio-TEPA to determine the mechanisms for the thrombocytopenia and subsequent recovery. The blood platelet number, platelet production (measured by 35S incorporation into platelets), mean platelet volume, and the number and DNA content of bone mar...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：
更新日期：1986-03-01 00:00:00
abstract：:A novel polypeptide with a molecular weight of 17 kd (17k protein) was identified in bone marrow cell cultures. The synthesis of 17k protein is elevated in cell cultures maintained under Dexter conditions, which support myelopoiesis. The predominance of macrophages in the stromal layer of these cultures and the observ...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：
更新日期：1990-10-01 00:00:00
abstract：:Using an accurate technique for staining and scoring soft agar cultures, this study defines the incidence of circulating CFUEOS in normal donors. With whole mononuclear cells as the source of colony stimulating factor (CSF) and fetal calf serum, 49.6% +/- 3.5 of the colonies were eosinophilic; with human placental con...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：
更新日期：1982-03-01 00:00:00
abstract：:Granulocyte colony-stimulating factor (G-CSF) has proven effective in the prophylaxis of chemotherapy-induced neutropenia and as a mobilizer of peripheral blood progenitor cells. The longevity of G-CSF action is limited by its removal from the body by two mechanisms. The first is thought to be mediated via receptors (...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/s0301-472x(99)00112-5
更新日期：1999-12-01 00:00:00
abstract：:Murine low-density bone marrow cells sorted from the blast cell window on the basis of high rhodamine-123 retention (Rh-bright), are highly enriched in histamine-, IL-4-, and IL-6-producing cells. We established by in situ hybridization that up to 50% of this population (around 0.25% of the whole bone marrow) coexpres...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/s0301-472x(99)00039-9
更新日期：1999-06-01 00:00:00
abstract：:The four existing animal models of cyclic hematopoiesis are briefly described. The unusual erythropoietin (Ep) responses of the W/Wv mouse, the Sl/Sld mouse, and cyclic hematopoietic dog are reviewed. The facts reviewed indicate that the bone marrow itself is capable of influencing regulatory events of hematopoiesis. ...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：
更新日期：1983-08-01 00:00:00
abstract：OBJECTIVE:These studies were performed to test the hypothesis that DNMT1 is required for maintenance of DNA methylation and repression of the γ-globin gene in adult-stage erythroid cells. MATERIALS AND METHODS:DNMT1 levels were reduced by nucleofection of small interfering RNA targeting DNMT1 in chemical inducer of di...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/j.exphem.2010.10.003
更新日期：2011-01-01 00:00:00
abstract：:The aberrant overexpression of Wilms tumor-1 (WT1) in acute myeloid leukemia (AML) plays an important role in blast cell survival by enhancing proliferation and inhibiting apoptosis. However, the mechanism underlying the overexpression of WT1 remains unclear. Here, we identified miR-193a (miR-193a-5p) and miR-600 targ...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/j.exphem.2018.02.001
更新日期：2018-05-01 00:00:00
abstract：OBJECTIVE:Monocyte-derived dendritic cells (DCs) play important roles in the immune response against infections and malignancies. Human herpesvirus 6 (HHV-6) infects monocytes and is reactivated in immunodeficient patients. To clarify the mechanisms of HHV-6-induced immunodeficiency, we investigated the effect of HHV-6...
journal_title：Experimental hematology
pub_type： 杂志文章
doi：10.1016/j.exphem.2006.02.001
更新日期：2006-05-01 00:00:00
