Abstract:
:Chromosomal rearrangements involving the MECOM (MDS1 and EVI1 complex) locus are recurrent genetic events in myeloid leukaemia and are associated with poor prognosis. In this study, we assessed the role of MECOM locus protein EVI1 in the transcriptional regulation of microRNAs (miRNAs) involved in the leukaemic phenotype. For this, we profiled expression of 366 miRNAs in 38 MECOM-rearranged patient samples, normal bone marrow controls and MECOM (EVI1) knock down/re-expression models. Cross-comparison of these miRNA expression profiling data showed that MECOM rearranged leukaemias are characterized by down regulation of MIR449A. Reconstitution of MIR449A expression in MECOM-rearranged cell line models induced apoptosis resulting in a strong decrease in cell viability. These effects might be mediated in part by MIR449A regulation of NOTCH1 and BCL2, which are shown here to be bona fide MIR449A targets. Finally, we confirmed that MIR449A repression is mediated through direct promoter occupation of the EVI1 transcriptional repressor. In conclusion, this study reveals MIR449A as a crucial direct target of the MECOM locus protein EVI1 involved in the pathogenesis of MECOM-rearranged leukaemias and unravels NOTCH1 and BCL2 as important novel targets of MIR449A. This EVI1-MIR449A-NOTCH1/BCL2 regulatory axis might open new possibilities for the development of therapeutic strategies in this poor prognostic leukaemia subgroup.
journal_name
Br J Haematoljournal_title
British journal of haematologyauthors
De Weer A,Van der Meulen J,Rondou P,Taghon T,Konrad TA,De Preter K,Mestdagh P,Van Maerken T,Van Roy N,Jeison M,Yaniv I,Cauwelier B,Noens L,Poirel HA,Vandenberghe P,Lambert F,De Paepe A,Sánchez MG,Odero M,Verhasseltdoi
10.1111/j.1365-2141.2011.08737.xsubject
Has Abstractpub_date
2011-08-01 00:00:00pages
337-48issue
3eissn
0007-1048issn
1365-2141journal_volume
154pub_type
杂志文章,多中心研究abstract::The French-American-British (FAB) classification assigns patients with myelodysplastic syndromes to the category of refractory anaemia with excess blasts (RAEB) if they have a medullary blast count of 5-20%, and/or a peripheral blast count of 2-5%. The new World Health Organization (WHO) classification subdivides RAEB...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.2005.05853.x
更新日期:2006-01-01 00:00:00
abstract::The significance of paroxysmal nocturnal haemoglobinuria (PNH(pos) ) cells and leucocyte subset telomere lengths in paediatric aplastic anaemia (AA) is unknown. Among 22 children receiving immunosuppressive therapy (IST) for AA, 73% (16/22) were PNH(pos) , of whom 94% achieved at least a partial response (PR) to IST; ...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/bjh.12656
更新日期:2014-03-01 00:00:00
abstract::Bacteria in platelet components (PC) may result in transfusion-related sepsis (TRS). Pathogen inactivation of PC with amotosalen (A-PC) can abrogate the risk of TRS and hence facilitate storage to 7 d. A randomized, controlled, double-blinded trial to evaluate the efficacy and safety of A-PC stored for 6-7 d was condu...
journal_title:British journal of haematology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1111/j.1365-2141.2011.08635.x
更新日期:2011-05-01 00:00:00
abstract::A patient with Jo-1 antibody-associated polymyositis (Jo-1 PM) had a Karnofsky score of 40% and severe muscle, liver and lung damage that was refractory to standard therapy. The female patient received an autologous T-cell-depleted haematopoietic stem cell transplant (HSCT) after myeloablative conditioning. The transp...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1046/j.1365-2141.2000.02191.x
更新日期:2000-08-01 00:00:00
abstract::Endogenous production of carbon monoxide (VCO), red cell survival and iron kinetics were studied in 15 subjects with Hodgkin's disease. The subjects were divided into two groups, namely: eight patients with anaemia (group A, haemoglobin (Hb) concentration less than 11.5 g/dl) and seven patients without anaemia (group ...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.1976.tb00919.x
更新日期:1976-02-01 00:00:00
abstract::Feto-maternal incompatibility for the human platelet antigen HPA-1a is an important cause of severe fetal thrombocytopenia. The incidence is 1 in 1000-2000 pregnancies, which is more common than other conditions for which screening is presently carried out. Antenatal diagnosis and management are now available, but onl...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.1995.tb05152.x
更新日期:1995-06-01 00:00:00
abstract::A pilot trial was initiated for chronic myeloid leukaemia patients, which employed imatinib for remission induction, followed by reduced-intensity conditioning and an in vivo T-cell depleted graft. Out of nine patients, six experienced a molecular relapse and one patient had a haematological relapse at a median interv...
journal_title:British journal of haematology
pub_type: 临床试验,杂志文章
doi:10.1111/j.1365-2141.2006.06404.x
更新日期:2007-01-01 00:00:00
abstract::Of 125 patients aged 65 years or over, with atrial fibrillation taking warfarin for at least 12 months, with a standard deviation (SD) of prothrombin time, expressed as the International Normalized Ratio (INR) >0.5 over the previous 6 months, 40 were randomized to continue with usual clinic care and 85 to receive educ...
journal_title:British journal of haematology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1365-2141.2004.05074.x
更新日期:2004-08-01 00:00:00
abstract::Liposome-entrapped desferrioxamine was administered to iron-over-loaded 59Fe lavelled mice. When given orally or intraperitoneally entrapment did not enhance the effect of the chelator, but given intravenously liposomal desferrioxamine doubled the 59Fe excretion for a given dose of the drug, and excretion after a sing...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.1979.tb05868.x
更新日期:1979-03-01 00:00:00
abstract::Hodgkin-Reed Sternberg (H-RS) cells harbour clonal immunoglobulin gene (Ig) rearrangements in almost all cases of classical Hodgkin's disease but lack Ig gene expression. In the H-RS cell line L1236, a somatic mutation of the Ig heavy-chain gene promoter octamer motif has been described as a putative reason for absenc...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1046/j.1365-2141.2001.03086.x
更新日期:2001-11-01 00:00:00
abstract::Five paediatric cases of haemophagocytic lymphohistiocytosis (HLH) which showed proliferation of granular atypical lymphocytoid cells in bone marrow are reported. All cases were girls aged 8 months to 4 years who had marked hepatosplenomegaly. Marker analysis on peripheral blood mononuclear cells revealed an increase ...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1046/j.1365-2141.1997.d01-2082.x
更新日期:1997-03-01 00:00:00
abstract::Interleukin-6 (IL6) plays a central role in multiple myeloma pathogenesis and confers resistance to corticosteroid-induced apoptosis. We therefore evaluated the efficacy and safety of siltuximab, an anti-IL6 monoclonal antibody, alone and in combination with dexamethasone, for patients with relapsed or refractory mult...
journal_title:British journal of haematology
pub_type: 杂志文章,多中心研究
doi:10.1111/bjh.12266
更新日期:2013-05-01 00:00:00
abstract::Many immune dysfunctions participate in immune thrombocytopenia (ITP) pathogenesis, including numeric and functional defects in suppressor T (Ts) cells and immune-regulation abnormalities in mesenchymal stem cells (MSCs). Recent studies showed that MSCs can promote Ts cell differentiation. Thus, we compared the Ts cel...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/bjh.16953
更新日期:2020-07-16 00:00:00
abstract::To investigate the role of neutrophils in complement-induced changes in vascular permeability, skin wheal and flare responses to intradermal injection of autologous activated serum complement were measured in normal and neutropenic subjects. In normal subjects, responses were dose-dependent and were abolished by remov...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.1986.tb04131.x
更新日期:1986-10-01 00:00:00
abstract::Addition of the inflammatory cytokine interleukin (IL)-6 to the culture medium of human cord blood haematopoietic stem and progenitor cells (HSPCs) has been shown to lead to an altered stromal cell-derived factor-1alpha-dependent migratory phenotype. This study investigated whether this effect was attributed to a diff...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.2008.07256.x
更新日期:2008-09-01 00:00:00
abstract::The Xba I polymorphic site in the factor VIII gene is present in the int22h-1 region which is found in two other copies (int22h-2 and int22h-3) distal to the gene. Previously the polymorphic status of the Xba I locus was studied by either Southern blot or PCR that amplified all three copies. Here we report the use of ...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1046/j.1365-2141.1999.01430.x
更新日期:1999-06-01 00:00:00
abstract::Eltrombopag is a thrombopoietin-receptor agonist that stimulates platelet production and increases platelet counts in patients with chronic immune thrombocytopenia (ITP). This open-label, single-arm study evaluated consistency of response and safety following repeated intermittent dosing of eltrombopag 50 mg daily ove...
journal_title:British journal of haematology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1111/bjh.12169
更新日期:2013-02-01 00:00:00
abstract::Murine monoclonal antibodies (MoAbs) were produced against the blood group KEL1 glycoprotein (93 kD component) immunopurified from human erythrocytes. One monoclonal antibody, 5A11 (IgGa, kappa), detects by immunoblotting a 93 and 184 kD component from KEL: 1,-2 or KEL: -1,2 red cell membrane preparations, separated b...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.1991.tb04539.x
更新日期:1991-10-01 00:00:00
abstract::Juvenile myelomonocytic leukaemia (JMML) is a unique myeloproliferative disorder of early childhood. Frequently, mutations in NRAS, KRAS, PTPN11, NF1 or CBL are found in these patients. Monosomy 7 is the most common cytogenetic aberration. To identify submicroscopic genomic copy number alterations, 20 JMML samples wer...
journal_title:British journal of haematology
pub_type: 杂志文章,评审
doi:10.1111/j.1365-2141.2011.08817.x
更新日期:2011-10-01 00:00:00
abstract::The outcomes of adult patients transplanted for Fanconi anaemia (FA) have not been well described. We retrospectively analysed 199 adult patients with FA transplanted between 1991 and 2014. Patients were a median of 16 years of age when diagnosed with FA, and underwent transplantation at a median age of 23 years. Time...
journal_title:British journal of haematology
pub_type: 杂志文章,多中心研究
doi:10.1111/bjh.15006
更新日期:2018-01-01 00:00:00
abstract::Clofarabine was the latest new drug to be approved, in 2004, for relapsed or refractory acute lymphoblastic leukaemia (ALL). To investigate its value in the frontline treatment of ALL we applied clofarabine 5 × 40 mg/m(2) in combination with pegylated asparaginase (PEG-ASP) 1 × 2500 iu/m(2) in high risk ALL patients a...
journal_title:British journal of haematology
pub_type: 杂志文章,多中心研究
doi:10.1111/bjh.12520
更新日期:2013-10-01 00:00:00
abstract::A robust method for obtaining chromosome preparations from individual haemopoietic colonies in semi-solid media is described. The accumulation of metaphases and the hypotonic treatment of cells were carried out in the culture dish and individual colonies were transferred onto poly-L-lysine-treated slides and fixed ste...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1046/j.1365-2141.1999.01428.x
更新日期:1999-06-01 00:00:00
abstract::Chronic graft-versus-host disease (cGVHD) is a common complication following allogeneic haematopoietic cell transplantation (HCT). It is the leading cause of non-relapse mortality in transplant survivors and has a significant impact upon their functional status and quality of life. Despite significant advances being m...
journal_title:British journal of haematology
pub_type: 杂志文章,评审
doi:10.1111/j.1365-2141.2007.06652.x
更新日期:2007-07-01 00:00:00
abstract::We report the characterization of three variant antithrombins with reduced heparin binding as the primary abnormality. Two of these variants, antithrombin Southport (Leu 99 to Val, 2759 C to G) and antithrombin Vienna (Gln 118 to Pro, 5349 A to C) were novel, whereas the third, Pro 41 to Leu, has been previously descr...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.1995.tb08369.x
更新日期:1995-03-01 00:00:00
abstract::Erythrocytes from elderly donors (> 70 years), but not young donors (18-35 years), are shown to undergo sequestration in an in vitro erythrophagocytosis assay. Comparable levels of sequestration are observed for high density erythrocytes from young individuals and both low density and high density erythrocytes from el...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.1993.tb04705.x
更新日期:1993-04-01 00:00:00
abstract::The arrangement of the T-cell receptor and immunoglobulin genes has been analysed in five cases of Lennert's lymphoma. All cases showed rearrangement of the gene coding for the beta chain of the T-cell receptor and a germline configuration of the immunoglobulin genes. This provides strong evidence that Lennert's lymph...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.1986.tb02208.x
更新日期:1986-11-01 00:00:00
abstract::18F-fluoro-deoxyglucose (FDG) positron emission tomography (PET) might be a better tool than computerized tomography (CT) in predicting long-term treatment outcome in patients with relapsed chemosensitive lymphoma who are candidates for autologous stem cell transplantation (ASCT). We studied patients with recurrent or...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1046/j.1365-2141.2003.04593.x
更新日期:2003-10-01 00:00:00
abstract::Bone marrow (BM) from patients affected by multiple myeloma (MM), exhibiting monoclonal gammopathy of undetermined significance (MGUS) or with non-Hodgkin lymphoma (NHL) as well as from healthy donors were investigated for the presence of human herpesvirus-8 (HHV-8) DNA sequences. ORF 26 sequences were detected in 36-...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1046/j.1365-2141.2001.02702.x
更新日期:2001-04-01 00:00:00
abstract::During treatment of human red cells with phospholipase A2 from bee venom, a linear increase of the MCV and of the osmotic fragility occurs in parallel with the cleavage of the accessible phospholipids. However, even after maximal hydrolysis, i.e. degradation of up to 65% of the phosphatidylcholines and up to 6% of the...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.1987.tb06869.x
更新日期:1987-03-01 00:00:00
abstract::To investigate the role of retinoblastoma susceptibility (RB) gene inactivation in leukaemogenesis, we evaluated 36 bone marrow specimens of acute leukaemia for RB protein expression by immunoprecipitation and Western blot analysis. 15 patients had no detectable RB protein at initial screening. However, nine of them w...
journal_title:British journal of haematology
pub_type: 杂志文章
doi:10.1111/j.1365-2141.1992.tb06459.x
更新日期:1992-11-01 00:00:00