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

A fluorescein-labelled anti-human immunoglobulin was used to demonstrate that peripheral blood from patients with myelofibrosis had a high proportion of phagocytic cells containing fluorescent immune complexes. Cells from patients with other myeloproliferative diseases (either chronic myeloid leukaemia or polycythaemia rubra vera) did not show similar intracellular immune complexes. Serum from patients with myelofibrosis incubated with polymorphs from healthy subjects caused the appearance of inclusions similar to those found when the patients' own cells were used, the healthy phagocytes apparently engulfing complexes from the patients' sera. The presence of platelets or complement did not alter the incidence of intracellular fluorescence. These tests may help in the diagnosis of myelofibrosis and may also be valuable in recognising the onset of this condition in patients with polycythaemia rubra vera.
 ...
PMID:Immune complexes in myeloproliferative disorders. 7 61

Platelet lipoxygenase and cyclo-oxygenase pathways were investigated by the incubation of 1(-14) C-arachidonic acid with washed platelets in 33 patients with myeloproliferative disorders, including 14 patients with chronic myeloid leukemia (CML), 12 with polycythemia vera (PV), 4 with essential thrombocythemia (ET), and 3 with myelofibrosis (MF). In patients with MF and CML, mean activities of the lipoxygenase pathway were significantly lower when compared with normal controls (p less than 0.001 and p less than 0.01, respectively). When a normal range of the activity was defined as mean +/- 2 SD, all patients with MF, 8 with CML, 6 with PV, and 1 with ET showed decreased lipoxygenase activities, while activities of the cyclo-oxygenase pathway were decreased in one of each patient with CML, PV, and ET. In 4 of 10 patients with a selective lipoxygenase deficiency, platelets were aggregated by lower concentrations of arachidonic acid than those necessary to induce normal platelet aggregation. It is suggested that the lipoxygenase activity could modulate platelet functions through its effect on arachidonate metabolism by the cyclo-oxygenase pathway and that a selective lipoxygenase deficiency could offer a mechanism for hyperfunction of the platelet, which may lead to a thrombotic tendency, one of the common features of myeloproliferative disorders.
 ...
PMID:Altered arachidonate metabolism by platelets in patients with myeloproliferative disorders. 11 95

It was shown by Pincus and Klebanoff that a correlation existed between leukocytic iodination measured in vivo and microbicidal leukocytic activity. We have analyzed the results of this test in relation to time and in the presence of variable quantities of polymorphonuclear leukocytes (PMN). The values observed per time and PMN unit proved to be equivalent in the presence of 2.5 X 105 PMN or 5.0 x 105 PMN per 0.5 ml of incubation medium, measured after 10, 20 and 30 minutes or in the presence of 1.0 x 106 PMN, measured after 10 minutes. That is to say iodination is proportional to leukocyte concentration and incubation time. Increase of either the quantity of cells or the incubation time, beyond the area we defined, reduced iodination per cell and per unit of time. Concerning the patients with an insufficient iodination, we have studied 2 parameters in the presence of 5.0 x 105 PMN: 1) initial iodination measured after 10 and 20 minutes and 2) stability of iodination measured after 60 minutes. These two parameters were equally affected in two cases with myelofi-rosis, 3 patients with acquired refractory anaemia, one with chronic lymphoid leukaemia, one with erythroleukaemia, one with hairy cell leukaemia, one with systemic mastocytosis and almost complete myeloperoxidase dificiency, one with sickle cell disease, two with liver diseases and two with chronic myeloid leukaemia. The iodination at the 60th minute was more affected than at the 10th minute with a patient with myelofibrosis and 4 other patients with acquired refractory anaemias. The significance of these differences is not well understood; however the meaning of the decrease in the iodination of whatever type is that a PMN anomaly exists directly related to the myeloperoxidase H2O2 halogenation system, or to one of the stages of engulfment and/or metabolic events preceeding it and leading to the production of H2O2. This test, with the alterations we introduced, is suggested as a test for detection of functional PMN abnormalities.
 ...
PMID:Quantitative iodination of human blood polymorphonuclear leukocytes. 16 86

In 31 patients with chronic myeloid leukemia, the initial bone marrow biopsy constantly showed considerable cell richness. The maturation of the granulocytes was harmonious in 52% of cases, with a predominance of myelocytes in 32% of cases, and groups of myeloblasts in 13% of cases. Eosinophilia was frequent and fairly intense. Fairly numerous loaded cells and Charcot-Leyden crystals were signs of granulocyte failure in the bone marrow. The erythroblasts were reduced, the megakaryocytes increased. Myelofibrosis was present in 45% of cases. This gave a very characteristic histological appearance. It was not possible to draw up correlations between the type of granulocyte maturation and/or the presence of myelofibrosis and, on the other hand, the clinical course of the disease, but the small number of case studied both in our series and in the literature do not permit one to carry out a proper statistical study.
 ...
PMID:[Bone-marrow biopsy in chronic myeloid leukemia. Value of the initial examination]. 18 24

The rare presence of the ph1 chromosome in chronic myeloproliferative disorders other than chronic granulocytic leukemia (CGL), i.e. polycythemia vera (PV), myeloid metaplasia with myelofibrosis (MMM) and hemorrhagic thrombocytopenia (HT) raised the question whether or not the Ph1 chromosome is peculiar to CGL. In an attempt to answer this question, the authors reports six cases of positive-Ph1 of which two are from their personal experience and four from the literature. Three of these six cases converted to CGL. The authors conclude that the cases of Ph1-positive PV and HT are transition forms to CGL, and the cases of Ph1-positive MMM are in fact secondary forms derived from CGL.
 ...
PMID:Ph1-positive polycythemia vera. 26 77

Splenectomy was perfomed in three patients with typical chronic myeloid leukaemia after a compensated stage had been reached with busulphan. Marked pancytopenia as a result of hypersplenism occurred in one patient 14 months after the end of the primary induction, and was successfully treated by splenectomy after radiotherapy of the spleen had failed. Splenectomy was performed without complication, and the histological appearance of the spleen showed myeloid infiltrates while there was none in the liver biopsy. After another 18 months the patient remained compensated, without busulphan administration. In the two other patients splenectomy was performed in the recompensated stage, one month and five years, respectively, after the primary induction had been concluded. In these two patients, too, there was myeloid infiltration of the spleen. In both, mild leucocytosis with shift to the left as far as promyelocytes occurred six and two weeks, respectively, after splenectomy and busulphan was started again. Twelve and ten months, respectively, after splenectomy they are both in the compensated stage. The importance of splenectomy in the early phase lies in the possibility of delaying blast crisis and avoiding myelofibrosis, as well as in the prevention of complications in the later stages.
 ...
PMID:[Splenectomy for chronic myeloid leukaemia in the early and late phases (author's transl)]. 26 88

The cytogenetic status of bone marrow stromal elements obtained from six patients with Ph1-positive chronic myelogenous leukemia (CML), two in blast crisis, was studied in vitro utilizing the potential of marrow to form surface-adherent colonies morphologically compatible with mesenchymal elements. We demonstrated the absence of both the marker chromosome and other chromosomal abnormalities in all the fibroblastic colonies studied, indicating that the progenitors of such colonies (plaque-forming units in culture, PFU-C) are not closely related to hematopoietic elements including macrophages. This supports previous reports suggesting that the stromal elements in myelofibrosis associated with CML are not derived from the primary Ph1-positive malignant clone but represent a stromal reactive component of benign or independent malignant potential.
 ...
PMID:Cytogentics of fibroblastic colonies in Ph1-positive chronic myelogenous leukemia. 27 58

An experimental model system is presented for the investigation in humans of the role of hematopoietic stromal elements in the regulation of hematopoiesis as well as in the pathogenesis of myelofibrosis in myeloproliferative disorders. The model is based on the simultaneous application of three experimental techniques: (1) growth of bone-marrow derived fibroblastic colonies in vitro, (2) cytogenetic demonstration of marker chromosomes associated with hematopoietic malignancies, and (3) the transplantation of isolated stromal elements into athymic (nude) mice. Using this model, we describe the induction of mesenchymal tumors in nude mice by Ph1 negative fibroblasts obtained from the bone marrow of a patient with a Ph1 positive chronic myelogenous leukemia. Mesenchymal tumors also were induced in nude mice with bone marrow-derived fibroblasts from a patient with aplastic anemia, who was successfully treated with bone marrow transplantation, and from a normal human volunteer. Morphologic, cytogenetic and electron microscopic studies of bone marrow mesenchymal elements in culture and of tumors induced in nude mice from the CML patient indicate the cells composing the tumor are of human origin and are negative for the Ph1 chromosome. The results provide the first in vivo morphological and cytogenetic support using human materials, of the hypothesized relationship of progenitors of in vitro fibroblastic colonies to marrow stromal elements.
 ...
PMID:Production of mesenchymal tumors in nude mice by Ph1 negative fibroblasts obtained from a Ph 1 positive CML patient: a preliminary report. 27 72

Bone marrow colony forming cell (CFC) concentration and the proportion of CFC in DNA synthesis were studied in myeloproliferative disorders and aplastic anaemia. Growth patterns of bone marrow cells in agar cultures were able to supplement traditional morphological and clinical criteria in the diagnosis of these haematological conditions. Bone marrow CFC concentration tended to be increased in chronic myeloid leukaemia (CML) and polycythaemia vera (PV), but decreased in myelofibrosis, erythroleukaemia, paroxysmal nocturnal haemoglobinuria (PNH) and the aplastic phase of aplastic anaemia. The proportion of CFC in DNA synthesis was decreased in CML, myelofibrosis and aplastic anaemia, but increased in blastic transformation, PV, PNH and during regeneration from aplastic anaemia. The proportion of CFC in DNA synthesis in bone marrow from patients with CML in blastic transformation was directly related to the percentage of myeloblasts in the bone marrow. CFC kinetics in blastic transformation have been demonstrated to be different from those in acute leukaemia.
 ...
PMID:The colony forming cell in the myeloproliferative disorders and aplastic anaemia. 28 55

The diagnostic value of the Alkaline Leucocyte Phosphatase (ALP) was checked on the basis of the patients of a hematologic department. Reliable data can only be obtained for the differential diagnosis of polycythemia vera and secondary polycythemia, not however for the differential diagnosis of chronic myeloid leukemia (CML) and myelofibrosis. In CML the ALP is an aid for evaluating the course of the disease and its remissions. In Hodgkin's disease it is an objective parameter for actiivty of the disease. The leucocyte concentration method can be used for evaluation of the ALP.
 ...
PMID:[Diagnostic value of alkaline leucocyte phosphatase in hematology (author's transl)]. 28 25


1 2 3 4 5 6 7 8 9 10 Next >>