Abstract:
:Eosinophils are important in antibody-mediated immune defense against parasites based on interaction with Ig receptors (FcR). Of the three classes of IgG FcR in humans, hFc gamma RI, II, and III, solely hFc gamma RII (CD32) is expressed on freshly isolated eosinophils. Despite an expression level similar to that found on monocytes and polymorphonuclear granulocytes, binding activity of hFc gamma RII on eosinophils is constitutively low. Freshly isolated eosinophils had a negligible ability to form rosettes with IgG-sensitized erythrocytes (EA-IgG). Addition of granulocyte-macrophage colony-stimulating factor (GM-CSF) caused an approximately threefold increase in EA-IgG rosettes. This increase was maximal after 35 minutes, and declined upon further incubation at 37 degrees C. Analysis of hFc gamma RII expression levels showed no significant changes and neither was the expression of other hFc gamma R classes induced. Blocking studies with anti-Fc gamma receptor monoclonal antibody (MoAb) proved hFc gamma RII specificity of enhanced IgG complex binding. These phenomena were not restricted to GM-CSF action, because the addition of interleukin-3 or interleukin-5 similarly enhanced EA-IgG binding. The kinetics of activation of hFc gamma RII binding activity were paralleled by the binding of EA-C3bi to CR3 on eosinophils. In contrast to the stable expression of hFc gamma RII during activation with GM-CSF, CR3 expression increased slowly. Ligand binding via both types of opsonin receptors proved receptor specific. However, the kinetics of enhanced binding via hFc gamma RII and CR3 suggested the possibility of a common mechanism underlying the enhancement of ligand binding via hFc gamma RII and CR3. This hypothesis was supported by the fact that binding via hFc gamma RII proved sensitive to both high concentrations of F(ab')2 fragments of anti-CD11b MoAb MO1 and chelation of bivalent cations with EDTA. In conclusion, our studies indicate that cytokines can induce a transient enhancement of hFc gamma RII binding activity. Qualitative, and not quantitative, changes in this receptor appear to underly the modulation of binding activity, which may be linked to changes in CR3 activity.
journal_name
Bloodjournal_title
Bloodauthors
Koenderman L,Hermans SW,Capel PJ,van de Winkel JGsubject
Has Abstractpub_date
1993-05-01 00:00:00pages
2413-9issue
9eissn
0006-4971issn
1528-0020journal_volume
81pub_type
杂志文章相关文献
BLOOD文献大全abstract::It has been suggested that human cytomegalovirus (HCMV) evades the immune system by infecting and paralyzing antigen-presenting cells. This view is based mainly on studies of dendritic cells (DCs) obtained after culture of monocytes (moDCs). It is contradicted by the asymptomatic course of HCMV infection in healthy pe...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2005-05-2016
更新日期:2006-03-01 00:00:00
abstract::Low-dose interferon-alpha (IFN-alpha) therapy is consistently effective in the treatment of hairy cell leukemia (HCL). In two cases of resistance to IFN-alpha administration, we diagnosed variant HCL, a form of HCL with intermediate features between typical HCL and B cell prolymphocytic leukemia. We tried to distingui...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1986-10-01 00:00:00
abstract::Regulatory dendritic cells (DCs) play an important role in maintaining peripheral tolerance or immune homeostasis. Our previous study demonstrated that mature DCs could be driven by splenic stroma to proliferate and differentiate into a novel subset of regulatory DCs (diffDCs) displaying a Th2-biased cytokine profile....
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2006-03-005595
更新日期:2006-10-01 00:00:00
abstract::We report 3 cases of a previously uncharacterized form of histiocytosis presenting in early infancy and showing ALK immunoreactivity. The patients presented with pallor, massive hepatosplenomegaly, anemia, and thrombocytopenia. Liver biopsy showed infiltration of the sinusoids by large histiocytes with markedly folded...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2008-03-147017
更新日期:2008-10-01 00:00:00
abstract::We investigated the effects of recombinant human granulocyte-macrophage colony-stimulating factor (rhGM-CSF) and recombinant human granulocyte colony-stimulating factor (rhG-CSF) therapy on the natural killer (NK) cell lineage in patients with aplastic anemia and myelodysplastic syndrome. Selected bone marrow (BM) cel...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1991-12-15 00:00:00
abstract::Cyclopentenone prostaglandins are potent inhibitors of nuclear factor-kappa B (NF-kappa B), a transcription factor with a critical role in promoting inflammation and connected with multiple aspects of oncogenesis and cancer cell survival. In the present report, we investigated the role of NF-kappa B in the antineoplas...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2004-04-1360
更新日期:2005-02-15 00:00:00
abstract::Patients with classic hydroa vacciniforme-like lymphoproliferative disorder (HVLPD) typically have high levels of Epstein-Barr virus (EBV) DNA in T cells and/or natural killer (NK) cells in blood and skin lesions induced by sun exposure that are infiltrated with EBV-infected lymphocytes. HVLPD is very rare in the Unit...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood.2018893750
更新日期:2019-06-27 00:00:00
abstract::The effects of alpha 2-antiplasmin and fibrin on the activation of plasminogen by recombinant staphylokinase (STAR) were studied in an effort to elucidate further the molecular basis of the fibrin-specificity of this fibrinolytic agent. In purified systems consisting of 1.5 mumol/L intact or low-M(r) plasminogen and 3...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1993-08-15 00:00:00
abstract::Ad.CMV-CD is a replication incompetent adenoviral vector carrying a cytomegalovirus (CMV)-driven transcription unit of the cytosine deaminase (CD) gene. The CD transcription unit in this vector catalyzes the deamination of the nontoxic pro-drug, 5-fluorocytosine (5-FC), thus converting it to the cytotoxic drug 5-fluor...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1998-07-15 00:00:00
abstract::Ectopic expression of fibroblast growth factor receptor 3 (FGFR3) associated with t(4;14) has been implicated in the pathogenesis of human multiple myeloma. Some t(4;14) patients have activating mutations of FGFR3, of which a minority are K650E (thanatophoric dysplasia type II [TDII]). To investigate the role of autop...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2004-09-3686
更新日期:2005-07-01 00:00:00
abstract::Marrow specimens obtained from 23 patients with acute myelocytic leukemia were exposed to cytosine arabinoside and/or daunorubicin in vitro, and the effects of these agents on colony formation in vitro was determined. Thymidine suicide indices were determined as well, which permitted a distinction to be made between k...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1980-09-01 00:00:00
abstract::CD177 is a glycosylphosphatidylinositol (GPI)-anchored protein expressed by a variable proportion of human neutrophils that mediates surface expression of the antineutrophil cytoplasmic antibody antigen proteinase 3. CD177 associates with β2 integrins and recognizes platelet endothelial cell adhesion molecule 1 (PECAM...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2017-03-768507
更新日期:2017-11-09 00:00:00
abstract::CD40 is present on both normal and neoplastic B-lineage cells. CD40 stimulation of normal B cells has been shown to promote normal growth and differentiation, whereas aggressive histology B lymphomas are growth inhibited. The inhibition of neoplastic B-cell growth is believed to occur via activation-induced cell death...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood.v100.1.217
更新日期:2002-07-01 00:00:00
abstract::Families with 3 different syndromes characterized by autosomal dominant inheritance of low platelet count and giant platelets were studied. Fechtner syndrome is an autosomal-dominant variant of Alport syndrome manifested by nephritis, sensorineural hearing loss, and cataract formation in addition to macrothrombocytope...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:2000-11-15 00:00:00
abstract::Ferroportin (FPN) mediates iron export from cells; FPN mutations are associated with the iron overloading disorder hemochromatosis. Previously, we found that the A77D, V162del, and G490D mutations inhibited FPN activity, but that other disease-associated FPN variants retained full iron export capability. The peptide h...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2005-02-0561
更新日期:2005-08-01 00:00:00
abstract::Managing vitamin K antagonist (VKA) therapy is challenging in children because of a narrow therapeutic range and wide inter- and intra-individual variability in dose response. Only a few small studies have investigated the effect of nongenetic and genetic factors on the dose response to VKAs in children. In a cohort s...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2011-07-365502
更新日期:2012-01-19 00:00:00
abstract::MicroRNAs (miRNAs) have emerged as important regulators of the immune system. However, despite this prominence, our understanding of the function of miRNAs in the early hematopoietic stages is incomplete. In this study, we found that miR-139-5p negatively regulated the proliferation of hematopoietic stem cells and pro...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2016-02-702464
更新日期:2016-10-27 00:00:00
abstract::Humans and mice with impaired perforin-dependent cytotoxic function may develop excessive T-cell activation and the fatal disorder hemophagocytic lymphohistiocytosis (HLH) after infection. Though cytotoxic lymphocytes can kill antigen-presenting cells, the physiological mechanism of perforin-mediated immune regulation...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2013-04-495309
更新日期:2013-06-27 00:00:00
abstract::In severe human beta-thalassemia, the pathophysiology relates to accumulation of excess alpha-globin chains at the membrane. One hypothesis is that membrane-associated alpha-globin by virtue of it's iron or hemichromes produces oxidation of adjacent membrane proteins. The availability of a mouse model of severe beta-t...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1992-02-15 00:00:00
abstract::This 2-part, double-blind, placebo-controlled study was conducted to determine the safety and efficacy of etoricoxib, a COX-2 selective inhibitor, for the treatment of hemophilic arthropathy. In part 1 (6 weeks), 102 patients (> or = 12 years old) with hemophilic arthropathy were randomized to receive 90 mg etoricoxib...
journal_title:Blood
pub_type: 杂志文章,随机对照试验
doi:10.1182/blood-2004-09-3501
更新日期:2006-03-01 00:00:00
abstract::Acute graft-versus-host disease (GVHD) that is resistant to therapy is a highly lethal complication of marrow transplantation. Inflammatory cytokines such as interleukin-1 (IL-1) may be critical mediators of this process. If so, specific inhibition of IL-1 activity with recombinant human IL-1 receptor antagonist (IL-1...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1994-08-15 00:00:00
abstract::DNA methylation has pivotal regulatory roles in mammalian development, retrotransposon silencing, genomic imprinting, X-chromosome inactivation, and cancer. Cancer cells display highly dysregulated DNA methylation profiles, characterized by global hypomethylation in conjunction with hypermethylation of promoter CpG is...
journal_title:Blood
pub_type: 杂志文章,评审
doi:10.1182/blood.2019791475
更新日期:2019-10-31 00:00:00
abstract::Bortezomib (PS-341), a selective inhibitor of proteasomes, induces apoptosis in multiple myeloma (MM) cells; however, prolonged drug exposure may result in cumulative toxicity and the development of chemoresistance. Here we show that combining PK-11195 (PK), an antagonist to mitochondrial peripheral benzodiazepine rec...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2004-02-0547
更新日期:2004-10-15 00:00:00
abstract::Personalized immunotherapy of lymphoma based on tumor idiotype (Id) has shown anti-idiotype humoral immune responses in 40%-50% and cellular immune responses in 50%-75% of follicular lymphoma patients, indicating that this therapy can be clinically successful. We have developed a novel vaccine against lymphoma consist...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2011-05-355461
更新日期:2012-03-01 00:00:00
abstract::The expression and function of a glycoprotein Ib (GPIb) complex on human umbilical vein endothelial cells (HUVECs) is still a matter of controversy. We characterized HUVEC GPIb using viper venom proteins: alboaggregins A and B, echicetin, botrocetin, and echistatin. Echicetin is an antagonist, and alboaggregins act as...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1999-04-15 00:00:00
abstract::ETS2 and ERG are transcription factors, encoded on human chromosome 21 (Hsa21), that have been implicated in human cancer. People with Down syndrome (DS), who are trisomic for Hsa21, are predisposed to acute megakaryoblastic leukemia (AMKL). DS-AMKL blasts harbor a mutation in GATA1, which leads to loss of full-length...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2008-08-174813
更新日期:2009-04-02 00:00:00
abstract::Endothelial sialomucin CD34 functions as an L-selectin ligand mediating lymphocyte extravasation only when properly glycosylated to express a sulfated carbohydrate epitope, 6-sulfo sialyl Lewis x (6-sulfo SLe(x)). It is thought that multivalent 6-sulfo SLe(x) expression promotes high-affinity binding to L-selectin by ...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2009-03-210237
更新日期:2009-07-16 00:00:00
abstract::Intravital microscopy of the calvarium is the only noninvasive method for high-resolution imaging of the bone marrow (BM) and hematopoietic stem cell (HSC) niches. However, it is unclear if the calvarium is representative of all BM compartments. Using the combination of whole body optical imaging, intravital microscop...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2012-11-467498
更新日期:2013-09-05 00:00:00
abstract::Erythropoietin (EPO) is the hormone necessary for development of erythrocytes from immature erythroid cells. EPO activates Jun N-terminal kinase (JNK), a member of the mitogen-activated protein kinase (MAPK) family in the EPO-dependent murine erythroid HCD57 cells. Therefore, we tested if JNK activity supported prolif...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2003-05-1754
更新日期:2004-08-01 00:00:00
abstract::The microbiota is known to influence the generation of hematopoietic progenitors, although the pathways underlying this process are still poorly understood. NOD1 and NOD2 are intracellular sensors for both Gram-positive and Gram-negative bacteria, but their role in steady-state hematopoiesis has never been characteriz...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2016-06-723742
更新日期:2017-01-12 00:00:00