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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Biotherapy 2 (1990), S. 315-324 
    ISSN: 1573-8280
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0584
    Keywords: CML ; Phase II trial ; IFN treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Alpha- and gamma-interferons have been shown to actively suppress hematopoiesis in patients in the chronic phase of chronic myelogenous leukemia in vitro and in vivo. Since both interferons act through different receptors on their hematopoietic target cells, they are expected to be capable of independently inhibiting abnormal blood cell development in patients with chronic myelogenous leukemia. We have utilized recombinant human interferon alfa-2c to treate 11 patients with Philadelphia chromosome positive chronic myelogenous leukemia in chronic phase, who were resistant to previous interferon gamma therapy. Ten of the patients were evaluable for hematologic, cytogenetic and molecular-genetic response following interferon alfa-2c therapy for 6 to 30 months. In 5 patients, IFN alfa-2c treatment failed due to lack of hematologic response. A complete hematologic or partial hematologic response was achieved in the remaining 5 patients. Three of these experienced cytogenetic improvement with reappearence of 100% diploid hematopoietic cells and disappearence of c-abl/bcr rearrangement in one patient. In two patients interferon alfa-2c did not prevent transformation of the disease into an accelerated state or blast crisis, respectively. We conclude that recombinant human interferon alfa-2c may also control hematopoiesis in interferon-gamma resistant chronic myelogenous leukemia patients, although the long-term response will need to be elucidated in further studies.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0584
    Keywords: Chronic myelogenous leukemia ; Allogeneic bone marrow transplantation ; Minimal residual disease ; BCR/ABL mRNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A modified two-step polymerase chain reaction (PCR) was used for the amplification of BCR/ABL mRNA in 16 patients with Philadelphia chromosomepositive (Ph+) chronic myelogenous leukemia (CML) following allogeneic bone marrow transplantation (BMT). At different intervals after BMT, patient cells were assessed for the presence of BCR/ABL mRNA by two subsequent rounds of PCR amplification; this procedure increased the sensitivity for the detection of one Ph+ cell in 104–5 to one cell in 105–6. Eight of 16 patients were negative by two-step PCR 1–39 months after BMT, suggesting an elimination of Ph-positive cells or a decrease below the threshold of detection. Although five patients showed negative results by the one-step PCR only, they were tested positive when nested primers were used, indicating a substantial decrease in the amount of BCR/ABL target mRNA compared with earlier pre- or post-transplant analyses. One patient who was still PCR positive 27 months after BMT became negative 12 months later. Persistence of BCR/ABL mRNA-expressing cells correlated with subsequent clinical relapse only when the transplantation was performed during blast crisis. All patients who underwent transplantation in chronic phase, including those with BCR rearrangement by PCR, are in clinical and hematological remission between 24 and 95 months after BMT. We conclude that aggressive chemotherapy combined with total body irradiation is unable to completely eradicate the malignant clone in all CML patients, and it might be speculated that other mechanisms (e.g., graft versus host reaction [GVHD] or graft versus leukemia effect [GVL]) may effectively eliminate residual leukemic cells.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0584
    Keywords: Aplastic anemia ; Therapy ; Interleukin-3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This case report describes the clinical use of recombinant human interleukin-3 as adjunct to immunosuppressive therapy with antilymphocyte globulin, cyclosporin A, and methylprednisolone for refractory severe aplastic anemia. Hematopoietic response to treatment was moderate and peripheral blood counts (neutrophils, eosinophils, monocytes, reticulocytes) increased only slightly. Unexpectedly, during the time of interleukin-3 administration a substantial bone marrow infiltration by macrophages became detectable, consistent with the diagnosis of medullary histiocytosis, that may have prevented recovery of normal hematopoiesis in this patient. This observation may indicate the need for careful use of interleukin-3 in patients with drug-induced immunodeficiency.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0584
    Keywords: High grade Non Hodgkin's lymphoma ; Upfront therapy ; Salvage therapy ; MACOP-B
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Between Nov. 1985 and Nov. 1988, sixty-three patients with high grade malignant (hg) and intermediate grade malignant (img) Non Hodgkin's Lymphoma (NHL) were treated with MACOP-B (methotrexate, doborubicin, cyclophosphamide, vincristine, prednison and bleomycin). Thirty-seven patients received MACOP-B as an upfront treatment modality, whereas twenty-six patients had relapsed disease and received MACOP-B as a salvage protocol. Four weeks after termination of therapy, 75% of patients with de novo NHL and 72% of the patients with relapsed NHL were in complete remission (CR). In the group of newly diagnosed NHL, 22% achieved partial remission (PR) and 3% no change (NC), whereas in the group with relapsed disease 14% had PR and 14% had progressive disease (PD). At a medium follow-up of 12 months (range 1 month to 33 months), 74% of patients with de novo NHL continued to be in CR whereas the continuous CR rate in patients with relapsed disease was 35%. Overall survival after 30 months of observation for the patient group with de novo NHL was 75% and 40% for patients with relapsed NHL. The mean duration for completion of the projected 12 chemotherapy cycles, given in weekly intervals, was 12.9 and 13.5 weeks in upfront or salvage therapy, respectively. With low incidence of major toxicities, application of drugs on an outpatient basis, and high efficacy, MACOP-B shows substantial advantges for therapy of de novo and relapsed NHL.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0584
    Keywords: Human lymphoma clonogenic assay ; Human bone marrow stroma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We have analyzed cultures of malignant lymphoma cells and cells from patients with acute lymphoid leukemia in methylcellulose for their ability to from colonies. Clonogenic growth was examined in the presence or absence of fetal calf serum (FCS), platelet-poor plasma (PPP), medium conditioned by phytohemagglutininstimulated leukocytes (PHA-LCM), or irradiated allogeneic bone marrow stroma cells. Cells from 25 lymphoma patients — 17 with non-Hodgkin's lymphoma (NHL), eight with Hodgkin's disease (HD) — and from 19 patients with acute lymphocytic leukemia (ALL) were investigated. We show that colony growth can be obtained in a minority of cases (in 3 NHL, 5 HD, and 2 ALL) and that the use of FCS and allogeneic irradiated stroma cells may be required for optimal colony formation.
    Type of Medium: Electronic Resource
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