Abstract:
:It has been suggested that CD44 mediates adhesive interactions between hematopoietic progenitor cells and the stromal microenvironment. Ligands of CD44 include several extracellular matrix components, such as hyaluronic acid and fibronectin. Antibodies against CD44 have been shown to induce homotypic T cell aggregation, and to stimulate T and natural killer cell activity. We hypothesized that CD44 could similarly amplify interactions between blast-colony-forming cells and bone marrow stromal cells (BMSCs). Indeed, we have previously found that the anti-CD44 antibody NKI-P2 enhanced VLA-4-dependent interactions. Here, we studied an additional panel of nineteen anti-CD44 antibodies from the 5th Workshop on Leukocyte Differentiation antigens, to find out whether amplification was associated with a particular CD44 epitope. None of these antibodies showed inhibitory activity, whereas nine significantly increased the number of blast colonies more than 2-fold. Seven of these recognized epitope 1, and two epitope 2. More than 4-fold enhancement was only observed with epitope 1 antibodies: 4.C3 (4.4-fold), 212.3 (6.3-fold), L178 (9.1-fold), and NIH44-1 (9.2-fold). Our data suggest that primarily epitope 1 is associated with enhancement of colony formation. Furthermore, the findings support a role for CD44 as an amplifier in progenitor-BMSC interactions.
journal_name
Acta Haematoljournal_title
Acta haematologicaauthors
Oostendorp RA,Spitzer E,Dörmer Pdoi
10.1159/000203886subject
Has Abstractpub_date
1996-01-01 00:00:00pages
243-7issue
3-4eissn
0001-5792issn
1421-9662journal_volume
95pub_type
杂志文章abstract::A case of isolated lambda-light chain proteinemia and proteinuria is reported. During a 42-month follow-up, no sign of myelomatosis or amyloidosis developed and Bence Jones proteinuria remained nearly of the same magnitude. This case of apparently idiopathic Bence Jones gammopathy, the first lambda-type so far reporte...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000207409
更新日期:1980-01-01 00:00:00
abstract::A case of angioimmunoblastic lymphadenopathy (AILD) with important autoimmune symptoms disappearing under Levamisole therapy is reported. Since Levamisole is thought to have no direct effect on B cells, it is supposed that in AILD it regulates B lymphocyte activity via the restoration of impaired T cell functions. ...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000207551
更新日期:1979-01-01 00:00:00
abstract::Monocytoid B cell lymphoma (MBCL) is an immunologically and morphologically well-defined low-grade lymphoma with a predilection for lymph nodes of the parotid region. We describe an association of MBCL with anti-myelin-associated glycoprotein (MAG) polyneuropathy in a 53-year-old male. The diagnosis of stage IV MBCL w...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000046603
更新日期:2001-01-01 00:00:00
abstract::Eltrombopag is a thrombopoietin receptor agonist frequently used to manage immune thrombocytopenia and aplastic anemia. At the high doses used for aplastic anemia, but not the doses used for immune thrombocytopenia, eltrombopag can cause reddish-brown discoloration of plasma, which can interfere with bilirubin measure...
journal_title:Acta haematologica
pub_type:
doi:10.1159/000508599
更新日期:2020-07-22 00:00:00
abstract::Two subjects, not previously reported in detail, had severe inherited deficiencies of erythrocyte pyrimidine nucleotidase. This was manifested hematologically by moderate hemolytic anemia with splenomegaly, morphologically by punctate basophilic stippling of Wright's stained erythrocytes, and biochemically by intraery...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000207413
更新日期:1980-01-01 00:00:00
abstract::The course and management of avascular necrosis of the femoral head (AVNFH) in six hips of 5 sickle cell syndrome patients (3 with Hb SS, 1 with Hb SC and 1 with Hb S/beta+-thalassaemia) are described. Two patients (aged 13 and 17 years) presented with Perthes- and osteochondritis dessicans-type lesions. These hips pr...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000205873
更新日期:1987-01-01 00:00:00
abstract:OBJECTIVE:Adherence to tyrosine kinase inhibitor treatment is a significant factor in the achievement of a good clinical response in chronic myeloid leukemia (CML). The aim of this retrospective study is to investigate 1- and 2-year medication adherence to imatinib treatment, linking adherence rates with the clinical o...
journal_title:Acta haematologica
pub_type: 评论,杂志文章
doi:10.1159/000444626
更新日期:2016-01-01 00:00:00
abstract::Serum soluble interleukin-6 receptor (sIL-6R) concentrations were measured in 50 patients with plasma cell dyscrasias using a commercially available immunoenzymatic assay kit. There were 40 patients with multiple myeloma (MM), 5 patients with monoclonal gammopathy of undetermined significance (MGUS), 3 patients with s...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000203682
更新日期:1997-01-01 00:00:00
abstract::Progenitor cell fractions from normal human marrow have been prepared by a method that enables low numbers of cells to be cultured and results in very little T cell or monocyte contamination. The enrichment of 14- and 21-day BFU-E was similar to that for CFU-GM and the readdition of sheep red blood rosette-forming cel...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000207022
更新日期:1982-01-01 00:00:00
abstract::The effects of lithium on the microtubular and microfilament systems of neutrophil granulocytes is described. The phagocytic capacity of human neutrophils was reduced or inhibited by using vinblastine or cytochalasin B. Lithium at concentrations ranging from 0.5 to 2.0 mEq/l proved to be capable of antagonising the ac...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000206173
更新日期:1985-01-01 00:00:00
abstract::We have demonstrated that hemopoietic organ fibroblastoid cells can produce colony-stimulating activity (CSA) in vitro. Skin fibroblasts also produced CSA. The colonies which formed were restricted to the granulocyte/macrophage differentiation pathways. A linear relationship was obtained for granulocyte/macrophage col...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000206924
更新日期:1983-01-01 00:00:00
abstract::We report the identification of an Hb S homozygosity in a 29-year-old multiple-transfused patient with severe kidney disease using a new reverse-transcription polymerase chain reaction (RT-PCR) technique with mRNA as starting template. The procedure requires considerably less time than sequencing of genomic DNA and is...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000204121
更新日期:1995-01-01 00:00:00
abstract::The cutaneous inflammatory response in patients with Hodgkin's and non-Hodgkin's lymphomas was investigated by light and scanning electron microscopy and compared with that of healthy subjects at 24 and 48 h. Both groups of patients showed a reduction in overall cellularity and statistically significant differences in...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000207253
更新日期:1980-01-01 00:00:00
abstract::At diagnosis, clonal gene rearrangement probes [retinoic acid receptor (RAR)-alpha, major breakpoint cluster region (M-bcr), immunoglobulin (Ig)-JH, T cell receptor (TcR)-beta, myeloid lymphoid leukemia (MLL) or cytokine genes (GM-CSF, G-CSF, IL-3)] were detected in bone marrow samples from 71 of 153 patients with acu...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000041035
更新日期:2000-01-01 00:00:00
abstract::In order to study the abnormal differentiation and proliferation of precursor T cells in homosexual men, a study was made of T-cell colony formation in 15 healthy homosexual men without anti-human immunodeficiency virus (HIV) antibody. The colony forming method used was the one-step monolayer technique using phytohema...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000205374
更新日期:1989-01-01 00:00:00
abstract::Inferferon alfa-2b (IFN) plays a major role in the current management of previously untreated patients with chronic myelogenous leukemia (CML) as well as patients with CML who have relapsed after bone marrow transplantation. Hydroxyurea (HU) is the best conventional drug for treatment of CML in the chronic phase. Ten ...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000203859
更新日期:1996-01-01 00:00:00
abstract::A hairy-cell leukaemia (HCL) cell line, HCL-O, was established from the peripheral blood of a 62-year-old Japanese patient with a unique variant of HCL strongly expressing CD21, the receptor for the Epstein-Barr virus (EBV). The HCL-O cells expressed antigens similar and dissimilar to those expressed with the original...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000204129
更新日期:1994-01-01 00:00:00
abstract::A patient with acute monoblastic leukemia developed a coagulopathy during chemotherapy. Coagulation studies showed thrombocytopenia, hypofibrinogenemia, high levels of fibrinogen degradation products, a negative protemine test but a normal antithrombin III level. These observations suggest that coagulation abnormaliti...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000207433
更新日期:1980-01-01 00:00:00
abstract::High-dose gammaglobulin therapy for patients with idiopathic thrombocytopenic purpura (ITP), introduced by Imbach et al., was applied to 5 adults with chronic refractory ITP to investigate the mechanism of the increase in platelet counts. In 4 of the 5 cases, transient increase in platelet count was observed. Platelet...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000206927
更新日期:1983-01-01 00:00:00
abstract::Two pregnancies at risk for Fanconi's anemia have been monitored by a cytogenetic method in the first trimester of gestation. The rate of chromosome breakage was evaluated in spontaneous mitoses from a direct preparation of trophoblasts in one case and from mitoses obtained from standard cultures and from mitoses trea...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000206309
更新日期:1985-01-01 00:00:00
abstract::The ability of human bone marrow particles to produce a microenvironment conducive to granulocytopoiesis was tested by culturing them in vitro without an exogenous source of colony stimulating activity (CSA). Granulocytopoiesis in this system was confirmed by the following observations: (1) presence of mitotic figures...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000207809
更新日期:1977-01-01 00:00:00
abstract::A patient with regional enteritis had received iron dextran for treatment of iron deficiency. Subsequently he developed a large (3.1 g/100 ml) IgG-K serum spike which had precipitin activity against dextran sulfate but not a variety of other antigens. There has been no evidence of multiple myeloma and the spike gradua...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000207755
更新日期:1978-01-01 00:00:00
abstract:BACKGROUND:Biphenotypic acute leukemia (BAL) is a rare type of acute leukemia that presents with a high degree of heterogeneity and is not well defined. METHODS:We identified 51 cases (3%) of BAL from 1,693 newly diagnosed acute leukemia patients according to the EGIL scoring system. The immunophenotyping, cytogenetic...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000322594
更新日期:2011-01-01 00:00:00
abstract::Low-risk patients with myelodysplastic syndromes (MDS) are inclined to long-term accumulation of iron in the organs due mostly to red blood cell transfusion and ineffective erythropoiesis. The effect of free toxic iron species in the liver and heart sites is well known, but recent knowledge assumes that oxidant-mediat...
journal_title:Acta haematologica
pub_type: 新闻
doi:10.1159/000510111
更新日期:2020-10-02 00:00:00
abstract::Downregulation of apoptosis has been proposed as a mechanism of clonal expansion in low-grade B cell neoplasms. We have previously described an unusual case of CD5+ B cell lymphoma characterized by cycles of leukemic phase alternating with spontaneous remission. In the present study, we examined the involvement of apo...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000041046
更新日期:2000-01-01 00:00:00
abstract::In the myelodysplastic syndromes (MDS) clonogenic marrow cell culture studies have demonstrated intrinsic hemopoietic stem cell and progenitor cell abnormalities consistent with these disorders representing clonal hemopathies. Abnormal responsiveness of these cells to stimulatory and inhibitory growth factors indicate...
journal_title:Acta haematologica
pub_type: 杂志文章,评审
doi:10.1159/000205911
更新日期:1987-01-01 00:00:00
abstract::6 patients with acute leukemia are described. All of them suffered from high temperature and malaise, and showed negative urine and blood cultures. High doses of gentamicin, cephalothin and cerebenicillin failed to lower the fever. The temperature became normal after administration of chloramphenicol (CAP) 2.0 g/day. ...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000207275
更新日期:1980-01-01 00:00:00
abstract::The increased incidence of parallel tubular structures in lymphocytes of patients with Hodgkin's disease was investigated for a correlation with either impairment of cellular immunity (measured by DNCB-skin test and PHA-induced lymphocyte stimulation in vitro) or an increase of antibodies against cytomegalovirus or Ep...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000208056
更新日期:1975-01-01 00:00:00
abstract::In evaluating hypoimmunoglobulinemia in a patient with nonsecretory myeloma, studies of in vitro immunoglobulin synthesis were performed during a 3-year period. Impaired polyclonal response to mitogen stimulation associated with excessive suppressor activity was demonstrable at diagnosis. Despite successful chemothera...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000205622
更新日期:1988-01-01 00:00:00
abstract::A 26-year-old female with Ki-1-positive large-cell anaplastic lymphoma is reported. The neoplastic cells were phenotypically and genotypically of T cell origin. Initially, neoplastic cells invaded the skin and lymph nodes, and then invaded the sternal and vertebral bones, ribs and the iliopsoas muscle. Central nervous...
journal_title:Acta haematologica
pub_type: 杂志文章
doi:10.1159/000204672
更新日期:1992-01-01 00:00:00