Abstract:
:We have investigated whether recombinant erythropoietin (r-Epo) elicits a change in intracellular free calcium (IFC) in purified Epo-responsive cells in spleens of mice treated with phenylhydrazine. Colony-forming units (CFU-E) were prepared by negative selection through immunologic panning. Anti-Forssman, Mac-1, Ia, and HSA antibodies were used to eliminate nonhematopoietic progenitors. After two pannings, 29 +/- 1.5% (mean +/- 1 SD) of the recovered cells were CFU-E. IFC was measured by labeling cells with the fluorescent dye Indo-1 and analyzing them on a flow cytometer from 15 seconds to 30 minutes after the addition of agonist. At each step of the panning procedure, there was no effect of r-Epo (0 to 10 U/mL) on IFC even in the larger cells that are predominantly CFU-E. As a positive control, calcium ionophore (A23187) significantly increased IFC in greater than 90% of the spleen cells enriched in CFU-E. During growth of CFU-E in methylcellulose, the calcium ionophore did not affect the r-Epo-dependent formation of erythroid colonies. EGTA inhibited the formation of erythroid colonies. This inhibition appeared to be the result of a toxic effect of the chelator because the colony growth could not be restored when Ca2+ was added to the cultures in the presence of the EGTA. We conclude that the biologic action of Epo on responsive erythroid cells does not depend on acute changes in IFC.
journal_name
Bloodjournal_title
Bloodauthors
Imagawa S,Smith BR,Palmer-Crocker R,Bunn HFsubject
Has Abstractpub_date
1989-05-01 00:00:00pages
1452-7issue
6eissn
0006-4971issn
1528-0020journal_volume
73pub_type
杂志文章相关文献
BLOOD文献大全abstract::The recruitment of phagocytic leukocytes to sites of vessel wall injury plays an important role in thrombus dissolution by proteases elaborated on their adhesion. However, leukocyte adhesion to the fibrin clot can be detrimental at the early stages of wound healing when hemostatic plug integrity is critical for preven...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2006-05-022764
更新日期:2007-02-15 00:00:00
abstract::We treated 5 patients with polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, and skin changes (POEMS) syndrome and multifocal bone lesions or diffuse bone marrow plasmacytic infiltration with high-dose therapy (HDT) and autologous blood stem cell transplantation. In all cases, the treatment produced...
journal_title:Blood
pub_type: 临床试验,杂志文章
doi:10.1182/blood.v99.8.3057
更新日期:2002-04-15 00:00:00
abstract::The Bernard-Soulier syndrome is an inherited bleeding disorder that is due to a deficiency in platelet glycoprotein Ib. Bernard-Soulier platelets fail to agglutinate in response to ristocetin despite normal levels of factor VIII:von Willebrand factor. We report a patient who developed severe refractory thrombocytopeni...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1987-08-01 00:00:00
abstract::The variability of laboratory findings in von Willebrand's disease (vWd) was evaluated by performing serial studies of bleeding time (BT), factor VIII coagulant activity (VIII:C), factor-VIII-related antigen (VIIIR:Ag) and ristocetin cofactor (VIIIR:Rcof) in 50 individuals from 25 families with this disorder. The type...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1980-10-01 00:00:00
abstract::Mechanisms underlying fetal hemoglobin (HbF) reactivation in stress erythropoiesis have not been fully elucidated. We suggested that a key role is played by kit ligand (KL). Because glucocorticoids (GCs) mediate stress erythropoiesis, we explored their capacity to potentiate the stimulatory effect of KL on HbF reactiv...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2002-05-1477
更新日期:2003-04-01 00:00:00
abstract::Human herpesvirus 6 (HHV-6) is a potentially immunosuppressive agent that has been suggested to act as a cofactor in the progression of HIV disease. Exposure of human macrophages to HHV-6A or HHV-6B profoundly impaired their ability to produce interleukin 12 (IL-12) upon stimulation with interferon-gamma (IFN-gamma) a...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2002-10-3152
更新日期:2003-10-15 00:00:00
abstract::The outcome of patients with acute myeloid leukemia who are older than 60 years has remained poor because of unfavorable disease characteristics and patient-related factors. The randomized German-Austrian AML Study Group 06-04 protocol was designed on the basis of in vitro synergistic effects of valproic acid (VPA) an...
journal_title:Blood
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1182/blood-2013-12-546283
更新日期:2014-06-26 00:00:00
abstract::Pulmonary arterial hypertension (PAH) is a progressive disease characterized by lung endothelial dysfunction and vascular remodeling. Recently, bone marrow progenitor cells have been localized to PAH lungs, raising the question of their role in disease progression. Independently, serotonin (5-HT) and its receptors hav...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2011-06-358374
更新日期:2012-02-16 00:00:00
abstract::Liver X receptors (LXRs) are nuclear receptors regulating lipid and cholesterol metabolism. Recent data revealed a cross talk between LXR and Toll-like receptor signaling in macrophages, indicating a role in immunity. Here, we show that LXRalpha is expressed in human myeloid dendritic cells (DCs) and induced during di...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2006-08-043422
更新日期:2007-05-15 00:00:00
abstract::To analyze the structure of the murine erythropoietin receptor (EpoR), wild-type or mutant EpoR cDNAs were expressed in cell lines, and the proteins that cross-linked with 125I-labeled erythropoietin (Epo) were analyzed by immunoprecipitation using an antibody against the intracellular region of the cloned EpoR. COS-7...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1993-04-01 00:00:00
abstract::The proto-oncogene c-myc has been identified as an early response gene for erythropoietin (Epo) in transformed murine erythroleukemia cells. Epo activation of c-myc in these cells requires protein kinase C. We now show the fidelity of this signaling pathway in normal erythroid cells isolated from the spleens of phenyl...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1992-01-01 00:00:00
abstract::The reduced folate carrier (RFC) is the dominant route for the uptake of various antifolates including PT523, a potent dihydrofolate reductase inhibitor (Ki = 0.35 pM) and an excellent transport substrate of the RFC (Kt = 0.7 microM). Here, we describe the multiple mechanisms of RFC inactivation in human leukemia PT52...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2005-10-4048
更新日期:2006-04-15 00:00:00
abstract::Stat5 proteins are critical signaling molecules activated by many cytokines. Within the immune system, Stat5 plays important roles related to the development of thymocytes and proliferation of T cells. Stat5 has been implicated in malignant transformation, and moreover, the activated tyrosine phosphorylated form of St...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2007-04-084707
更新日期:2008-01-01 00:00:00
abstract::Severe congenital neutropenia (SCN) is a syndrome characterized by an isolated block in granulocytic differentiation and an increased risk of developing acute myeloid leukemia (AML). Recent studies have demonstrated that the majority of patients with SCN and cyclic neutropenia, a related disorder characterized by peri...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2002-05-1372
更新日期:2002-11-01 00:00:00
abstract::IL-17 and its receptor are founding members of a novel family of inflammatory cytokines. IL-17 plays a pathogenic role in rheumatoid arthritis (RA)-associated bone destruction. However, IL-17 is also an important regulator of host defense through granulopoiesis and neutrophil trafficking. Therefore, the role of IL-17 ...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2005-09-010116
更新日期:2007-05-01 00:00:00
abstract::We have performed a retrospective analysis of the development of T- and B-cell functions after HLA-nonidentical T-cell-depleted bone marrow transplantation (BMT) performed in 193 patients with severe combined immunodeficiency (SCID) at 18 European centers between December 1982 and December 31, 1993. One hundred sixtee...
journal_title:Blood
pub_type: 杂志文章,多中心研究
doi:
更新日期:1998-05-15 00:00:00
abstract::Heme oxygenase-1 is an essential enzyme in heme catabolism, and its human gene promoter contains a putative heat shock element (HHO-HSE). This study was designed to analyze the regulation of human heme oxygenase-1 gene expression under thermal stress. The amounts of heme oxygenase-1 protein were not increased by heat ...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1996-06-15 00:00:00
abstract::Vascular cell adhesion molecule-1 (VCAM-1) and endothelial-leukocyte adhesion molecule-1 (ELAM-1) are adhesive proteins induced on endothelium by cytokines. We examined the contribution of these adhesive proteins to human peripheral blood monocyte adherence to endothelium using transfected Chinese hamster ovary (CHO) ...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1991-05-15 00:00:00
abstract::The expression of Rhesus antigens on hematopoietic progenitor cells was studied using monoclonal antibodies. Because these antibodies are not capable of lysing mature red blood cells in a complement-dependent cytotoxicity assay, fluorescence-activated cell sorting was performed. Using the monoclonal anti-Rh 29 antibod...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1985-09-01 00:00:00
abstract::Natural killer (NK) cells play critical roles in protection against hematological malignancies but can acquire a dysfunctional state, which limits antitumor immunity. However, the underlying reasons for this impaired NK cell function remain to be uncovered. We found that NK cells in aggressive B-cell lymphoma underwen...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood.2020005602
更新日期:2020-12-24 00:00:00
abstract::Granulocyte-macrophage colony-stimulating factor (GM-CSF) is a potent adjuvant in cancer vaccination; however, the specific role of endogenous GM-CSF remains unknown. We performed cell-based vaccination in 2 tumor models. First, we vaccinated C57BL/6 mice lacking either GM-CSF, IL-5, or beta-common chain (betac), a re...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2008-06-161075
更新日期:2009-06-25 00:00:00
abstract::Gangliosides, which are complex glycosphingolipids containing sialic acid, are found in cell membranes and have been implicated in a variety of cell surface events including cellular adhesion. Complex gangliosides were observed to inhibit the adhesion of thrombin-activated platelets to substrates of fibronectin, von W...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1989-02-01 00:00:00
abstract::Rituximab is a chimeric monoclonal antibody directed at CD20 with significant activity in non-Hodgkin lymphoma (NHL) and chronic lymphocytic leukemia (CLL). A variety of pathways of tumor cytotoxicity different from cytotoxic chemotherapy have been proposed for this therapeutic antibody including antibody-dependent ce...
journal_title:Blood
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1182/blood.v99.3.1038
更新日期:2002-02-01 00:00:00
abstract::The relationship between class switch recombination (CSR) and somatic hypermutation has been unclear. By using human CD27(-) naive B cells, we investigated the somatic hypermutation and producibility of immunoglobulins (Igs) that occur after CSR. Although neither adult CD27(-) nor cord blood B cells, which showed the ...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood.v99.2.567
更新日期:2002-01-15 00:00:00
abstract::Affinity purified anticardiolipin antibodies (ACLA) raised in rabbits showed cross-reactivities with various negatively charged phospholipids as shown by both the solid phase enzyme-linked immunosorbent assay (ELISA) and inhibition studies. In ELISA, ACLA showed strong cross-reactivity to both sphingomyelin (SM) and p...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1992-12-15 00:00:00
abstract::Interactions between P-selectin and P-selectin glycoprotein ligand-1 (PSGL-1) mediate the earliest "rolling" of leukocytes on the lumenal surface of endothelial cells at sites of inflammation. Previously, PSGL-1 has been shown to be the primary mediator of interactions between neutrophils and P-selectin, but studies o...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract::Genetic variation in the PEAR1 locus is linked to platelet reactivity and cardiovascular disease. The major G allele of rs12041331, an intronic cytosine guanine dinucleotide-single-nucleotide polymorphism (CpG-SNP), is associated with higher PEAR1 expression in platelets and endothelial cells than the minor A allele. ...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2015-11-682153
更新日期:2016-08-18 00:00:00
abstract::Although hereditary spherocytosis (HS) is a common disorder of the red cell membrane, its clinical and biologic expression at birth and in early infancy has received little attention. In order to obtain insights into the natural history of HS during infancy, we studied 46 neonates, 39 from families in which 1 of the p...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:2000-01-15 00:00:00
abstract::In childhood acute lymphoblastic leukemia (ALL), early response to treatment is a powerful prognostic indicator. To identify genes associated with this response, we analyzed gene expression of diagnostic lymphoblasts from 189 children with ALL and compared the findings with minimal residual disease (MRD) levels on day...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2006-01-0322
更新日期:2006-08-01 00:00:00
abstract::Current dosing algorithms do not account for genetic and environmental factors for warfarin dose determinations. This study investigated the contribution of age, CYP2C9 and VKORC1 genotype, and body size to warfarin-dose requirements. Studied were 297 patients with stable anticoagulation with a target international no...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2005-03-1108
更新日期:2005-10-01 00:00:00