Abstract:
:FLT3 and its ligand (FL) are one of the regulators of normal hematopoiesis. Ligand-independent activation of FLT3 occurs in about 30% of acute myeloid leukemia cases and is one goal for selectively targeted therapies. However, the function of FLT3/FL in the regulation of non-malignant immature hematopoietic cells is poorly characterized. In order to elucidate the role of FLT3 in normal hematopoiesis, human adult CD34(+) hematopoietic progenitor cells were cultured in cytokine-supplemented liquid culture in the presence or absence of FLT3 inhibition by CEP-701 (lestaurtinib). Total cell number, lineage-committed, and primitive progenitors and apoptosis were assayed. FLT3 expression and FL secretion in various conditions were analyzed by fluorescent activated cell sorter and enzyme-linked immunosorbent assay. Effects of nonspecific targeting of FLT3 were evaluated with addition of imatinib (Gleevec) to cell cultures. It is demonstrated that FLT3 inhibition impaired cell and progenitor cell growth and increased the rate in apoptosis. Effects were observed independent of addition of FL. The dose-dependent growth inhibition was partially equalized by inhibiting FL with a neutralizing antibody. FLT3 inhibition resulted in markedly increased production of FL by cultured CD34(+) cells as well as upregulation of FLT3 expression. Imatinib mimicked effects of selective FLT3 inhibition. In conclusion, FLT3 and its ligand regulate proliferation of hematopoietic progenitor cells in an autocrine/paracrine manner Nonspecific inhibition of FLT3 may contribute to hematotoxicity caused by imatinib treatment.
journal_name
Ann Hematoljournal_title
Annals of hematologyauthors
Weisel KC,Yildirim S,Schweikle E,Kanz L,Möhle Rdoi
10.1007/s00277-008-0605-6subject
Has Abstractpub_date
2009-03-01 00:00:00pages
203-11issue
3eissn
0939-5555issn
1432-0584journal_volume
88pub_type
杂志文章abstract::Obesity is a well-known risk factor for the development of cancer, but its influence on the course of disease is still controversial. We investigated the influence of body mass index (BMI) on overall survival (OS) in 502 patients with indolent non-Hodgkin's lymphoma or mantle cell lymphoma in a subgroup analysis of th...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-017-3003-0
更新日期:2017-07-01 00:00:00
abstract::Cryoglobulinemia is uncommon in Southern Chinese in Hong Kong, with tropical climates and low incidence of hepatitis C virus (HCV) infection. Eight positive cases were detected among 481 patients screened for cryoglobulins over a 10-year period. Three HCV carriers (38%) ran benign courses. The others included two carr...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-004-0955-7
更新日期:2005-02-01 00:00:00
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journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s002770050308
更新日期:1997-07-01 00:00:00
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journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-010-0901-9
更新日期:2010-08-01 00:00:00
abstract::Renal failure is one of the worst complications occurring in multiple myeloma (MM) patients. It does not affect survival if reverted by a prompt chemotherapy before the damage becomes irreversible; therefore, the early diagnosis of renal dysfunction is crucial. High and low molecular weight urinary proteins have prove...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-003-0699-9
更新日期:2003-08-01 00:00:00
abstract::In this report we show that serum has differentiation-inducing effects on primitive hematopoietic progenitor cells with the CD34++CD38- immunophenotype. Using the pre-colony forming unit (pre-CFU) assay as a model for early myelopoiesis, we compared the effects of serum-containing and serum-free media and evaluated di...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s002770000227
更新日期:2001-01-01 00:00:00
abstract::The prognostic value of cytogenetics in adult acute lymphoblastic leukemia (ALL) is not as established as in childhood ALL. We have analyzed the outcome and prognostic value of karyotype in 84 adults diagnosed with Philadelphia-negative ALL from a single institution that received induction chemotherapy and had success...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-011-1331-z
更新日期:2012-01-01 00:00:00
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journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-006-0091-7
更新日期:2006-05-01 00:00:00
abstract::The aim of the study was to investigate whether the well-known high anemia prevalence in pregnant women from the eastern Mediterranean and Asian regions decreased when the women immigrated to a low-frequency region (Denmark). During 70 months, 1,741 pregnant immigrant women referred from primary care to an obligatory ...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-007-0305-7
更新日期:2007-09-01 00:00:00
abstract::Sickle cell disease (SCD) is a hereditary condition characterized by homozygosis of the hemoglobin S (HbS) gene. Marked morbimortality is observed due to chronic hemolysis, endothelial injury, and episodes of vaso-occlusion, which leads to multi-organ damage. Renal impairment is common and may have different presentat...
journal_title:Annals of hematology
pub_type: 杂志文章,评审
doi:10.1007/s00277-019-03813-9
更新日期:2019-12-01 00:00:00
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journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-010-1154-3
更新日期:2011-08-01 00:00:00
abstract::Patients previously diagnosed with invasive aspergillosis (IA) have been considered to be at risk for relapse of mycosis during subsequent hematopoietic transplant. Even with prophylactic measures, reactivation of the infection occurs in 29% of patients undergoing bone marrow transplantation (BMT). A period of neutrop...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s002770100311
更新日期:2001-08-01 00:00:00
abstract::This study aimed to determine the clinical characteristics and prognostic significance of the meningioma 1 (MN1) gene and MN1-associated microRNA expression in Chinese adult de novo acute myeloid leukemia (AML) patients. The expression level of MN1, microRNA-20 (miR-20a), and microRNA-181b (miR-181b) in bone marrow mo...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-013-1729-x
更新日期:2013-08-01 00:00:00
abstract::This retrospective single-center analysis studied the impact of the conditioning and the graft-versus-host disease (GVHD) prophylaxis on outcome in unselected patients allografted for chronic myelomonocytic leukemia (CMML) and acute myeloid leukemia (AML) secondary to documented prior CMML. A total of 44 patients (med...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-020-03952-4
更新日期:2020-04-01 00:00:00
abstract::Autoantibody against erythrocytes has occasionally been observed in patients with de novo acute myelocytic leukemia (AML). However, it is not clear whether this autoantibody in AML patients induces frank hemolysis (autoimmune hemolytic anemia, AIHA), as seen in lymphoid neoplasms. We present two de novo AML patients w...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/BF00663016
更新日期:1996-01-01 00:00:00
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journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-020-03907-9
更新日期:2020-03-01 00:00:00
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journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-018-3290-0
更新日期:2018-07-01 00:00:00
abstract::The prognostic significance of molecular mutations (FLT3-ITD, NPM1, and CEBPA mutations) was examined in patients with normal-karyotype acute myeloid leukaemia (NK-AML) after allogeneic haematopoietic cell transplantation (HCT). In total, 115 patients received allogeneic HCT for NK-AML and were evaluated for FLT3-ITD,...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-015-2580-z
更新日期:2016-03-01 00:00:00
abstract::A case of congenital leukemia with monosomy 7 is reported. Immunological study of the blast cells using monoclonal antibodies was suggestive of both myelomegakaryocytic and T-lymphoblastic leukemia. Chromosomal analysis of the bone marrow cells showed monosomy 7. Chemotherapy was initiated with a combination of adriam...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/BF01836073
更新日期:1992-12-01 00:00:00
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journal_title:Annals of hematology
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1007/s002770050541
更新日期:1999-09-01 00:00:00
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journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-008-0564-y
更新日期:2009-01-01 00:00:00
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journal_title:Annals of hematology
pub_type: 杂志文章,多中心研究
doi:10.1007/s00277-016-2691-1
更新日期:2016-08-01 00:00:00
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journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-008-0633-2
更新日期:2009-06-01 00:00:00
abstract::B cell acute lymphoblastic leukemia (B-ALL) is an aggressive hematologic malignancy with limited treatment strategies. Histone deacetylases inhibitors (HDACis) are promising novel tools for cancer therapy, whose anti-tumor effects and the underlying mechanisms on B-ALL remain to be elucidated. Recently, Notch1 signali...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-012-1561-8
更新日期:2013-01-01 00:00:00
abstract::Several authors have described a particular potential of automated depolarization analysis in detecting malaria infection as part of the routine full blood count (FBC) performed by the Cell-Dyn 4000 analyzer. In these cases, abnormal depolarizing patterns are due to the presence of leukocyte-associated malaria hemozoi...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-003-0786-y
更新日期:2004-05-01 00:00:00
abstract::We conducted an investigation to clarify whether or not the levels of total, free, and functional protein S and C4-binding protein (C4bp) in plasma are decreased in systemic lupus erythematosus (SLE) patients, especially those with antiphospholipid antibody (aPL), which is known to be a causative factor of such compli...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/BF01696561
更新日期:1994-12-01 00:00:00
abstract::Eculizumab is indicated for the therapy of patients with symptomatic paroxysmal nocturnal hemoglobinuria (PNH). Due to inhibition of terminal complement cascade, patients on eculizumab are susceptible to Neisseria meningitidis infections. The two mainstays to reduce the risk of infection are vaccination and antibiotic...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-017-2924-y
更新日期:2017-04-01 00:00:00
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journal_title:Annals of hematology
pub_type: 杂志文章,meta分析
doi:10.1007/s00277-020-04016-3
更新日期:2020-06-01 00:00:00
abstract::Methods to estimate bone marrow plasma cells (BMPC) basically include histopathology, cytomorphology, and flow cytometry. The present study compares the outcomes of these methods with special focus on the impact of BMPC-specific characteristics on their recovery by either method. Laboratory reports of diagnostic sampl...
journal_title:Annals of hematology
pub_type: 杂志文章,多中心研究
doi:10.1007/s00277-020-04249-2
更新日期:2020-11-01 00:00:00
abstract:BACKGROUND:Low folate intake and changes in folate metabolism due to polymorphisms in the methylentetrahydrofolate reductase (MTHFR) gene have been associated with myelomagenesis. However, controversial data have been published regarding a protective role of variant alleles of MTHFR on MM. PATIENTS AND METHODS:To inve...
journal_title:Annals of hematology
pub_type: 杂志文章
doi:10.1007/s00277-006-0097-1
更新日期:2006-07-01 00:00:00