Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0023473 (chronic myeloid leukemia)
 18,916 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A cell line (LAMA-84) has been established from the blood of a patient with chronic myeloid leukemia in acute phase. LAMA-84 cells retained the patient's chromosome abnormalities, i.e., triplication of all chromosomes except chromosome 18, the presence of Philadelphia (Ph) chromosome in 4-5 copies, and the presence of chromosome markers. LAMA-84 cells have morphological features of undifferentiated blast cells, but analyses have indicated that they belong to the megakaryocytic lineage; platelet peroxidase (PPO) was found in 8.5% of cells; LAMA-84 cells reacted spontaneously with poly- and monoclonal antibodies against the platelet glycoproteins (GP) IIb, IIIa, and the GPIIb/IIIa complex, whose presence was confirmed by crossed immunoelectrophoresis. LAMA-84 cells lack the membrane characteristics of lymphoid and mature granulocytic cells but do, however, react with certain antibodies to immature myeloid cells. Furthermore, they are positive with an antiglycophorin antibody, and contain alpha- and gamma-globin mRNA, thus demonstrating erythroid marker expression. Thus LAMA-84 is a tripotent, megakaryocytic, erythroid, and granulocytic cell line. The megakaryocytic and erythroid markers were enhanced by the addition of DMSO, butyrate, TPA, and hemin. The LAMA-84 cell line represents an interesting tool for the study of megakaryocytic and erythroid differentiation and the mechanisms of neoplastic growth.
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PMID:Human chronic myeloid leukemic cell line with positive Philadelphia chromosome exhibits megakaryocytic and erythroid characteristics. 347 10

Seven cases of swine myeloid leukaemias were investigated by light and electron microscopy. All animals were adult sows. Morphologically these cases were classified as myeloblastic leukaemia with maturation (Cases 1 to 6) and chronic myeloid leukaemia (Case 7). The neoplastic cells were composed of immature promyelocytoid cells in Case 1. In Cases 2, 3, 4 and 5 there were immature or mature promyelocytoid cells containing peroxidase-positive granules. In Case 6, the neoplastic cells consisted of promyelocytoid cells and myelocytoid cells. The latter predominated and contained not only peroxidase-positive granules but also peroxidase-negative ones. The neoplastic cells in Case 7 showed various stages of cell maturation. The morphological characteristics in our cases resembled those in human myeloid leukaemias.
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PMID:Ultrastructure of swine myelogenous leukaemic cells, with particular reference to intracytoplasmic granules. 347 53

A case of well-documented and -illustrated megakaryoblastic transformation is described in a patient with thrombocythemia passing through a stage of myelofibrosis without features of chronic granulocytic leukemia. Immunocytologic studies with the use of conventional and monoclonal antibodies against platelet membrane glycoproteins and electron microscopic investigations, demonstrating bull's-eye granules and platelet peroxidase positivity, proved the megakaryocytic differentiation of the blast cells. From the onset of the disease as well as during the megakaryoblastic transformation, the Philadelphia (Ph1) karyotype, 46XX t(9:22) (q34:q11), was found in peripheral blood and bone marrow cells as the only clonal abnormality. Southern blot analysis of DNA extracted from the blast cells revealed a rearrangement within the bcr on chromosome 22 similar to findings in chronic granulocytic leukemia. The presentation with excessive small and abnormal megakaryocytes in the initial and subsequent bone marrow and the rapid progressive myelofibrosis and splenomegaly differentiate the Ph1 chromosome-positive thrombocythemia from the chronic myeloproliferation of thrombocythemia in its primary form or associated with polycythemia vera.
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PMID:Philadelphia chromosome-positive thrombocythemia and megakaryoblast leukemia. 347 3

Two cases of myeloproliferative disorders terminating in acute megakaryoblastic leukemia are reported. One case began as primary myelofibrosis and the other as chronic myelogenous leukemia. Blast cells in the acute leukemic phase were identified as megakaryoblasts by the presence of platelet peroxidase. The clinical course is described, and the morphology, immunologic studies, and ultrastructure studies of the blast cells are reported. On cytogenetic analysis both cases had a translocation involving the No. 3 chromosome locus q26.2. The present data suggest that 3q26 may be associated with transformation of the megakaryocytic lineage.
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PMID:Myeloproliferative disorders terminating in acute megakaryoblastic leukemia with chromosome 3q26 abnormality. 347 28

A new Ph1-chromosome positive cell line, KOPM-28. was established from a patient with chronic myelogenous leukemia (CML) in blast crisis. KOPM-28 cells were phenotypically immature: without azurophilic granules; negative for myeloperoxidase and positive for specific and nonspecific esterases. The nonspecific esterase reaction was intensified by TPA, and retinoic acid reinforced the specific esterase reaction without inducing morphological changes. KOPM-28 cells were not phagocytic. The cells expressed complement receptors, myeloid-monocytoid antigens, an Ia-like antigen and T4 antigen. CALLA, T-lymphocyte specific antigens, B-lymphocyte related antigen and platelet-megakaryocyte-megakaryoblast specific antigen were not detected. KOPM-28 cells formed colonies in semi-solid medium; this ability was augmented by GM-CSA. The addition of culture medium conditioned by KOPM-28 cells to normal bone marrow cells resulted in the increase of the CFU-C colonies. These findings indicate that KOPM-28 cells have features of myeloid and monocytoid precursor cells and that they are producing substance(s) which stimulates normal CFU-C.
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PMID:Ph1-positive CML-derived myeloid-monocytoid precursor cell line producing substance(s) that stimulates normal CFU-C. 349 66

A MCA raised against the human acute myelogenous leukaemia cell line KG1 reacted with only KG1 among 26 haematopoietic cell lines covering the major lineages. It reacted with early myeloid (M1/2), 1 of 2 acute myelomonocytic (M4) and most non-B non-T leukaemias, including blast crises of CGL. Among M1-AML cells, both MPO+ and MPO- blasts were BI-3C5+. Blasts in 3 Tdt+ M1-AMLs were simultaneously BI-3C5+. BI-3C5 reacted with 4% cells in normal BM, many of which were histologically recognisable as myeloid precursors. 8-15% of BI-3C5+ cells in BM were simultaneously Tdt+, and all were weakly Ia antigen+. BI-3C5 was unreactive with all peripheral leucocytes, with M3 and M5 AMLs, with lymphoid and myeloid leukaemias of "mature" phenotype (T-ALL, B-ALL, CLL, CGL) and with non-haematopoietic cell lines. BI-3C5 precipitated a 120K moiety from 125I-labelled KG1 membranes. It was not blocked by J5 anti-cALLA. The potential use of BI-3C5 in the classification of acute leukaemias is discussed.
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PMID:A novel monoclonal antibody BI-3C5 recognises myeloblasts and non-B non-T lymphoblasts in acute leukaemias and CGL blast crises, and reacts with immature cells in normal bone marrow. 385 2

We have studied, by ultrastructural morphology and immunocytochemistry, the alterations that occur in cells from the HL60 leukaemia cell line and from patients with CGL following incubation in vitro with 1,25(OH)2D3 for 2-5 days. The main morphological changes observed were in the nuclear shape, the development of autophagic vacuoles and the appearance of a population of small granules in the cytoplasm. These changes were associated with a significant reduction in MPO activity and increased expression of membrane antigens detected by the monocyte-specific McAb FMC17 and FMC32, as shown by the IGM at EM level, and a decrease in granulocyte-specific antigens demonstrated by the McAb FMC10. These observations suggest that promyelocytes and myelocytes could transform into monocyte-like cells and that this remodelling of cells was associated with autophagic digestion of cellular structures.
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PMID:Monocytic differentiation induced by 1,25 dihydroxyvitamin D3 in myeloid cells: an ultrastructural immunocytochemical study. 385 11

The expression of two membrane antigens identified by the monoclonal antibodies (McAb) My9 and 3C5 has been investigated in cells from 80 acute leukemias. My9 was positive in the blasts of 33 out of the 38 (87 per cent) cases of acute myeloid leukemia (AML) tested, regardless of FAB subtype, and in 13 of 18 (72 per cent) cases of chronic granulocytic leukemia (CGL) in myeloid blast crisis. The reactivity of 3C5 was confined to myeloblastic (M1) AML, 85 per cent of cases, and to lymphoblastic leukemia (ALL) of B-lineage, 70 per cent of cases, including CGL in lymphoid transformation. My9 was negative in ALL except for an unusual case. The phenotype My9+, 3C5+ was seen exclusively in M1 (69 per cent) and M2 (14 per cent) AML. Ultrastructural analysis with the immunogold method in combination with the myeloperoxidase (MPO) reaction showed that expression of My9 increased in parallel with MPO activity whereas 3C5 was expressed mainly in myeloblasts with little MPO content. We conclude that the use of these two McAb will contribute to the diagnosis and classification of AML and may throw some light to the pathogenesis of biphenotypic acute leukemias, including TdT + AML.
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PMID:Characterization of myeloid leukemias with monoclonal antibodies 3C5 and MY9. 386 40

Atypical megakaryoblasts (MKB) or megakaryocytes (MK) are occasionally present in the peripheral blood during the terminal development of chronic myeloid leukemia (CML). We report on a 49-year-old female suffering from Ph1 chromosome-positive CML with typical megakaryoblastic transformation in the peripheral blood and in the bone marrow. The small "blasts" were at the most only slightly larger and were occasionally even smaller than lymphocytes but showed megakaryoblastic or atypical megakaryocytic differentiation. The cytoplasmic cytochemical pattern of the atypical megakaryocytic cells was identical to that of large atypical thrombocytes. Platelet peroxidase was detected upon electron-microscopic (EM) examination. Immunologic characterization disclosed the presence of MK-specific antigens. When cultured in vitro on agar, the blasts transformed spontaneously into large mature MK, exhibiting characteristic cytochemical and immunological patterns. Cytogenetic examination of peripheral blood showed severe abnormalities. The patient did not respond to therapy and died 3 months after manifestation of the blast crisis.
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PMID:Megakaryoblastic micromegakaryocytic crisis in chronic myeloid leukemia. 386 78

Marrow or peripheral blood cells from 28 patients with acute myeloid leukemia (AML) or chronic myeloid leukemia in blastic crisis (CML-BC) were studied in both liquid and agar cultures. The proliferation and maturation of these cells were followed for 15-20 days in liquid culture with or without the addition of human placenta conditioned medium (HPCM) and/or retinoic acid (RA). In nine patients (group 1), cells underwent both proliferation and maturation, i.e., the percentage of peroxidase-positive cells (PO), phagocytic cells, and mature forms increased. For the remaining 19 patients (group 2), no proliferation was observed. However, 11 of these leukemic cell samples showed maturation (group 2A), while the eight others remained immature (group 2B). In agar culture, cell samples from group 1 showed cluster growth, group 2 no growth. Maturation without proliferation was observed for group-1 liquid cultures not containing HPCM and those containing HPCM and RA. The viability rapidly decreased in liquid cultures with only addition of RA. HPCM and RA showed no effect on group-2 cell cultures.
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PMID:Proliferation and maturation of human leukemic cells in liquid culture: activity of human placenta conditioned medium and retinoic acid. 386 56


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