Abstract:
:Atypical hemolytic uremic syndrome (aHUS) is classically described to result from a dysregulation of the complement alternative pathway, leading to glomerular endothelial cell (EC) damage and thrombosis. However, recent findings in families with aHUS of mutations in the DGKE gene, which is not an integral component of the complement cascade, led us to consider other pathophysiologic mechanisms for this disease. Here, we demonstrate that loss of DGKε expression/activity in EC induces an increase in ICAM-1 and tissue factor expression through the upregulation of p38-MAPK-mediated signals, thus highlighting a proinflammatory and prothrombotic phenotype of DGKε-deficient ECs. More interestingly, DGKE silencing also increases EC apoptosis and impairs EC migration and angiogenesis in vitro, suggesting that DGKE loss-of-function mutations impair EC repair and angiogenesis in vivo. Conversely, DGKE knockdown moderately decreases the expression of the complement inhibitory protein MCP on quiescent EC, but does not induce complement deposition on their surface in vitro. Collectively, our data strongly suggest that in DGKE-associated aHUS patients, thrombotic microangiopathy results from impaired EC proliferation and angiogenesis rather than complement-mediated EC lesions. Our study expands the current knowledge of aHUS mechanisms and has implications for the treatment of patients with isolated DGKE mutations.
journal_name
Bloodjournal_title
Bloodauthors
Bruneau S,Néel M,Roumenina LT,Frimat M,Laurent L,Frémeaux-Bacchi V,Fakhouri Fdoi
10.1182/blood-2014-06-579953subject
Has Abstractpub_date
2015-02-05 00:00:00pages
1038-46issue
6eissn
0006-4971issn
1528-0020pii
blood-2014-06-579953journal_volume
125pub_type
杂志文章相关文献
BLOOD文献大全abstract::Polycythemia vera (PV) and essential thrombocythemia (ET) are chronic myeloproliferative disorders characterized by an increased incidence of thrombo-hemorrhagic complications. The acquired somatic Janus kinase 2 (JAK2) V617F mutation is present in the majority of PV and ET patients. Because aberrant protein Tyr-phosp...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2008-12-196535
更新日期:2010-01-21 00:00:00
abstract::Microparticles (MPs) are submicron extracellular vesicles exposing phosphatidylserine (PS), detected at high concentration in the circulation of sickle cell anemia (SS) patients. Several groups studied the biological effects of MPs generated ex vivo. Here, we analyzed for the first time the impact of circulating MPs o...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood.2020004853
更新日期:2020-07-09 00:00:00
abstract::Folylpoly-gamma-gluatamate synthetase (FPGS) catalyzes the polyglutamylation and thus intracellular retention of folates and antifolates (eg, methotrexate; MTX) through the addition of multiple glutamate equivalents to their gamma-carboxyl residue. Since polyglutamylation of antifolates is crucial for their pharmacolo...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2008-08-173799
更新日期:2009-04-30 00:00:00
abstract::The translocation t(15;17)(q22;q21) is seen exclusively in patients with acute promyelocytic leukemia (APL) and in the promyelocytic blast crisis of chronic myeloid leukemia (CML). This translocation juxta-poses the promyelocytic leukemia (PML) gene on chromosome 15 and the retinoic acid receptor-alpha (RARA) gene on ...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1994-05-15 00:00:00
abstract::Deregulation of Notch signaling has been linked to the development of T-cell leukemias and several solid malignancies. Yet, it is unknown whether Notch signaling is involved in the pathogenesis of mycosis fungoides and Sézary syndrome, the most common subtypes of cutaneous T-cell lymphoma. By immunohistochemistry of 4...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2009-12-260216
更新日期:2010-10-07 00:00:00
abstract::C3H mice have higher average ploidy megakaryocytes than all other mouse strains tested, but the mode of inheritance of this anomaly is unknown. Therefore, to clarify the genetics of high ploidy megakaryocytes in C3H mice, we measured megakaryocyte DNA content from both male and female offspring from F1, as well as bac...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1994-03-15 00:00:00
abstract::The reduced folate carrier (RFC) is involved in the transport of methotrexate (MTX) across the cell membrane. The RFC gene (SLC19A1) is located on chromosome 21, and we hypothesized that the RFC80 G>A polymorphism would affect outcome and toxicity in childhood leukemia and that this could interact with chromosome 21 c...
journal_title:Blood
pub_type: 临床试验,杂志文章
doi:10.1182/blood-2010-01-256958
更新日期:2010-06-10 00:00:00
abstract::The TEL/PDGFbetaR fusion protein is expressed as the consequence of a recurring t(5;12) translocation associated with chronic myelomonocytic leukemia (CMML). Unlike other activated protein tyrosine kinases associated with hematopoietic malignancies, TEL/PDGFbetaR is invariably associated with a myeloid leukemia phenot...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1999-03-01 00:00:00
abstract::At inflammatory sites, proteoglycans are both secreted by activated mononuclear leukocytes and released as a consequence of extracellular matrix degradation. Chondroitin 4-sulfate proteoglycans constitute the predominant ones produced by activated human monocytes/macrophages. In this study, we show that two chondroiti...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1998-07-01 00:00:00
abstract::Granulocyte-macrophage colony-stimulating factor (GM-CSF) is a hematopoietic growth factor that stimulates the proliferation, maturation, and functional activity of myeloid cells in peripheral blood and bone marrow. Expression of GM-CSF is tightly regulated and is limited to cells stimulated directly (T cells, macroph...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1994-10-15 00:00:00
abstract::Bone morphogenetic proteins (BMPs), members of the transforming growth factor (TGF)-beta superfamily, are a group of related proteins that are capable of inducing the formation of cartilage and bone but are now regarded as multifunctional cytokines. We show in this report a novel function of BMPs in hematopoietic cell...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:2000-09-15 00:00:00
abstract::The molecular backgrounds of variants encountered in Afro-Caribbean black individuals and associated with the production of clinically significant antibodies against high-incidence antigens (anti-RH18, anti-RH34) and against Rhe epitopes were determined. We showed that RH:-18 phenotypes are produced by 3 distinct RHCE...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2002-01-0229
更新日期:2002-12-01 00:00:00
abstract::Plasmodium falciparum-infected erythrocytes (IRBC) roll on the adhesion molecule P-selectin in vitro under flow conditions that approximate the shear stress in capillary and postcapillary venules in which cytoadherence occurs in vivo. The pathological significance of this adhesive interaction is currently unknown. In ...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1998-06-15 00:00:00
abstract::The original activated partial thromboplastin time-based assay for activated protein C (APC)-resistant factor Va (FVa) requires carefully prepared fresh plasma and cannot be used in patients receiving warfarin or in patients with antiphospholipid antibodies. A new test is described here that circumvents these limitati...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1995-04-01 00:00:00
abstract::Little is known about the behavior of hematopoietic stem cells (HSCs) in primates because direct observations and competitive-repopulation assays are not feasible. Therefore, we used 2 different and independent experimental strategies, the tracking of transgene expression after retroviral-mediated gene transfer (N = 1...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2007-02-075382
更新日期:2007-09-15 00:00:00
abstract::The ataxia telangiectasia mutated (ATM)-interacting protein ATMIN mediates noncanonical ATM signaling in response to oxidative and replicative stress conditions. Like ATM, ATMIN can function as a tumor suppressor in the hematopoietic system: deletion of Atmin under the control of CD19-Cre results in B-cell lymphomas i...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2015-09-672980
更新日期:2016-10-20 00:00:00
abstract::The evidence for a regulatory role of acidic isoferritins on hemopoiesis is not entirely consistent with our knowledge of ferritin biochemistry, and no clear picture of this phenomeonon has emerged. In the present study, we have been unable to confirm a consistent effect of purified heart (acidic), spleen (basic), or ...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1986-02-01 00:00:00
abstract::Direct sequencing of VWF genomic DNA in 21 patients with type 3 von Willebrand disease (VWD) failed to reveal a causative homozygous or compound heterozygous VWF genotype in 5 cases. Subsequent analysis of VWF mRNA led to the discovery of a deletion (c.221-977_532 + 7059del [p.Asp75_Gly178del]) of VWF in 7 of 12 white...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2008-08-173278
更新日期:2009-07-30 00:00:00
abstract::Tumor angiogenesis is crucial for the progression and metastasis of cancer. The vasculature of tumor tissue is different from normal vasculature. Therefore, tumor vascular targeting therapy could represent an effective therapeutic strategy with which to suppress both primary tumor growth and tumor metastasis. The use ...
journal_title:Blood
pub_type: 杂志文章,评审
doi:10.1182/blood-2005-10-4114
更新日期:2006-04-15 00:00:00
abstract::We have recently demonstrated that IgD(hi) B cells can occupy an extravascular perisinusoidal niche in the bone marrow in addition to the well-established follicular niche in conventional secondary lymphoid organs. The spleen has long been considered to be the site at which newly formed B lymphocytes mature into IgD(h...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2006-05-021089
更新日期:2007-03-15 00:00:00
abstract::Aberrant expression of Aurora kinases and inactivation of wild-type p53 by Mdm2 overexpression are frequent molecular events in acute myelogenous leukemia (AML), and preclinical data for inhibition of Aurora kinases or Mdm2 are promising. However, it remains largely unknown whether the viability of cells exposed to Au...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2008-01-128611
更新日期:2008-10-01 00:00:00
abstract::Enteropathy-associated T-cell lymphoma (EATL) is a rare subtype of peripheral T-cell lymphomas with a poor prognosis. Autologous stem cell transplantation (ASCT) was retrospectively evaluated as a consolidation or salvage strategy for EATL. The analysis included 44 patients who received ASCT for EATL between 2000 and ...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2012-11-466839
更新日期:2013-03-28 00:00:00
abstract::Ly6G is a glycosylphosphatidylinositol (GPI)-anchored protein of unknown function that is commonly targeted to induce experimental neutrophil depletion in mice. In the present study, we found that doses of anti-Ly6G Abs too low to produce sustained neutropenia remained capable of inhibiting experimental arthritis, lea...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2012-01-404046
更新日期:2012-08-16 00:00:00
abstract::Tn polyagglutinability syndrome is an acquired condition where erythrocytes express Tn neo-antigen and become susceptible to hemagglutination by the naturally occurring anti-Tn present in normal sera. Early studies had indicated that O-linked N-acetyl galactosamine was the sole serologic Tn determinant, but more recen...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1992-11-01 00:00:00
abstract::Plasma fibronectin (pFN) cross-linked to fibrin during the injury response provides a provisional matrix required for cells to begin tissue repair. Using a synthetic matrix of pFN and fibrin as a substrate for cell adhesion and spreading, we have determined that pFN covalently cross-linked to fibrin into a complex mul...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1996-07-01 00:00:00
abstract::This study examines the role of neutrophils (PMN) in the pathogenesis of endotoxin-induced microclot formation. It is intended to clarify whether granulocytes are involved in endotoxin-induced activation of intravascular coagulation (generation of soluble fibrin) and/or in endotoxin-induced precipitation of soluble fi...
journal_title:Blood
pub_type: 杂志文章
doi:
更新日期:1975-05-01 00:00:00
abstract::Neutralizing antibodies (inhibitors) toward factor VIII form a severe complication in nonsevere hemophilia A, profoundly aggravating the bleeding pattern. Identification of high-risk patients is hampered by lack of data that take exposure days to therapeutic factor VIII concentrates into account. In the INSIGHT study,...
journal_title:Blood
pub_type: 杂志文章,多中心研究
doi:10.1182/blood-2013-02-483263
更新日期:2013-09-12 00:00:00
abstract::Human immunodeficiency virus-1 subtypes A and C differ in the highly conserved Gag-TL9 epitope at a single amino acid position. Similarly, the TL9 presenting human leukocyte antigen (HLA) class I molecules B42 and B81 differ only at 6 amino acid positions. Here, we addressed the influence of such minor viral and host ...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2009-02-206193
更新日期:2009-08-20 00:00:00
abstract::Platelets are vital for hemostasis because they release their granule contents in response to vascular damage. Platelet exocytosis is mediated by soluble N-ethylmaleimide-sensitive factor attachment protein receptors (SNAREs), whose interactions are governed by regulators, eg, Sec/Munc18 proteins. These proteins chape...
journal_title:Blood
pub_type: 杂志文章
doi:10.1182/blood-2012-05-430629
更新日期:2012-09-20 00:00:00
abstract::Over the past few years, substantial advances have been made in understanding the pathogenesis, evolution, and complexity of mast cell neoplasms. New diagnostic and prognostic parameters and novel therapeutic targets with demonstrable clinical impact have been identified. Several of these new markers, molecular target...
journal_title:Blood
pub_type: 杂志文章,评审
doi:10.1182/blood-2016-09-731893
更新日期:2017-03-16 00:00:00