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  • 1
    ISSN: 1432-1440
    Keywords: Cytogenetische Untersuchungen ; Suspensions-Kulturen, Agar-Kulturen ; Koloniebildende Zellen, Kolonie-stimulierende Aktivität ; Leukämie, myeloproliferative Erkrankungen, Knochenmarkinsuffizienz ; Cytogenetic studies ; Small volume liquid culture, soft agar culture ; Colony-forming cells, colony-stimulating activity ; Leukaemia, myeloproliferative disorders, bone marrow insufficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In patients with haemopoietic failure, the low incidence of cells in mitosis often prevents successful chromosome preparations. By performing liquid cultures of myeloid cells a high incidence of mitoses could be obtained even in those cases failing to provide mitoses when the direct preparation technique was used. The cytogenetic studies demonstrated that the mitoses achieved by culture techniques were aneuploid and, thus, there is evidence that they are of leukaemic origin. The combination of short-term liquid culture and chromosome analysis appears to be a diagnostic approach in selected cases of hemopoietic insufficiency.
    Notes: Zusammenfassung Cytogenetische Untersuchungen sind bei Patienten mit Knochenmarkinsuffizienz häufig nicht möglich, da nur wenige oder keine Zellen in Mitose vorhanden sind. Mit Hilfe von Suspensions-Kulturen hämopoetischer Zellen konnte jedoch selbst in denjenigen Fällen eine große Zahl von Mitosen gewonnen werden, bei denen mit der direkten Präparationstechnik keine Mitosen gefunden werden. Durch cytogenetische Untersuchungen konnte nachgewiesen werden, daß die gewonnenen Mitosen aneuploid und somit leukämischen Ursprungs sind. Die Kombination von Kurzzeit-Suspensions-Kulturen und Chromosomenanalyse ist in bestimmten Fällen mit Knochenmarkinsuffzienz von diagnostischer Bedeutung.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Aplastic anemia ; Immunosuppressive treatment ; Antithymocyte globulin ; Cyclosporin A
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Twenty-three patients with aplastic anemia (18/23 with severe aplastic anemia) were treated with an immunosuppressive regimen consisting of cyclosporin A (CsA) and methylprednisolone (MP) (n=7) or CsA, MP, and antithymocyte globulin (ATG;n=16). Nineteen patients are alive with a follow-up of 4 to 25 months; three patients died of infections and one of a gastrointestinal hemorrhage. Within 3 months, improvement of hematopoiesis was seen in 14 patients (61%). First signs of a response after 23 to 88 days were followed by complete remission in eight patients, partial remission in three patients, and minimal improvement in three patients. Two of the patients with only minimal improvement were treated with a second course of immunosuppression and reached a complete remission and partial remission. Interestingly, remission proved to be dependent on the continued administration of CsA in four of five patients with partial or complete remission who could be evaluated up to now. Thus, CsA must have been effective in the induction and/or maintenance of remission in three patients. This observation is a very strong argument for the role of T cells in the pathogenesis of at least some cases of aplastic anemia and warrants further evaluation of the role of CsA in the treatment of aplastic anemia.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1440
    Keywords: Bone-marrow transplantation ; Cytomegalovirus infection ; Interstitial pneumonia ; Hyperimmunoglobulin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Conditioning therapy with aggressive chemotherapy and irradiation induces a state of transient combined immunodeficiency in bonemarrow transplant recipients. This promotes the occurrence of severe cytomegalovirus (CMV) infections, the most frequent lethal complication after bone-marrow transplantation (BMT) at present. Forty-four BMT recipients received CMV-IgG-hyperimmunoglobulin for CMV prophylaxis intravenously. The efficacy of this prophylaxis and possible risk factors for the occurrence of CMV-induced interstitial pneumonia (IP) were analyzed. Risk factors for the promotion of a CMV-IP were: additional immunosuppressive therapy after BMT, CMV-positive serostatus of the recipient, CMV-seropositive granulocyte transfusion, CMV infection immediately prior to BMT, and HLA-haploidentical BMT. In this study the incidence of graftversus-host disease was low and was not associated with the incidence of CMV infections. The use of T-cell-depleted grafts did not result in increased CMV infections or IP and may possibly have improved the immunological reconstitution.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1440
    Keywords: Bone marrow transplantation ; Aplastic anaemia ; Acute leukaemia ; Chronic granulocytic leukaemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary From 1972–1983 53 patients underwent bone marrow transplantation. The median age was 18 years (3–41). 27 patients suffered from severe aplastic anaemia, 22 patients had acute leukaemia and 4 patients had chronic granulocytic leukaemia in chronic phase. Out of 22 patients with acute leukaemia, 2 had florid leukaemia, 2 had an early relapse and 18 patients were in first or second remission of their disease. 2/53 patients received a syngeneic transplant, 51/53 patients an allogeneic transplant. 47/51 patients had a HLA-A, B, C-identical, MLC-negative sibling donor, 1/51 had a HLA-A, B-C-identical, MLC-positive sibling donor, 2/51 a HLA-phaenotypical identical parental donor and 1/51 a HLA-identical, MLC-negative unrelated donor. The comparison of the results obtained in patients with severe aplastic anaemia transplanted from 1972–1979 with those transplanted from 1980–1983 shows that the bone marrow transplantation has to be performed in an early stage of the disease before the patients become multiple transfused, sensitized and severely infected and that the conditioning regimen for polytransfused patients has to be more intensive than in untransfused patients. From the patient group transplanted 1972–1979, only 1/14 patients is a long-term survivor in contrast to 8/13 patients transplanted from 1980–1983. 11/22 patients with acute leukaemia are alive between more than 5 years and 14 days after bone marrow transplantation. Only 1/4 patients, who were transplanted not in remission, is alive. For patients with acute leukaemia the bone marrow transplantation should be performed in an early stage of their disease when the tumor burden is small and when the patients are in good clinical condition. 2/4 patients with CGL are alive between 12 months and 3 months after bone marrow transplantation. In our patient group graft versus host disease was the most important problem with a high mortality due to GvHD associated infections.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 23 (1986), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Fully H-2-incompatible chimeric mice were constructed by grafting lethally (950 rad) irradiated germ-free (GF) CBA (H2k) mice with anti-Thy 1 antibody plus complement-treated allogeneic C57B1/6 (B6) (H2b) bone marrow cells. These chimeric mice were kept for more than 11 months, either under GF conditions or under barrier-sustained specific-pathogen-free (SPF) conditions. Controls included nonirradiated, nontransplanted, sex- and age-matched CBA and B6 mice raised under SPF conditions, and syngeneic chimeric mice of the CBA × CBA type kept under GF and SPF conditions. All chimeric mice were completely repopulated with donor-type lymphoid cells and showed no clinical or histological evidence of graft-versus-host disease. From the fully allogeneic chimeric mice, we enumerated the numbers of splenic cytotoxic T lymphocyte precursors (CTL-p) that could be clonally expanded under limiting dilution conditions in response to third-party alloantigens, or nonmodified and trinitrophenyl (TNP)-modified stimulator cells bearing host or donor H-2 antigens. The existence of high numbers of alloreactive and host- or donor-type H-2-restricted TNP-specific CTL-p in the spleens of fully allogeneic chimeras indicated almost normal immunocompetence. The surprising finding, however, was that large numbers of host (CBA)-reactive splenic CTL-p were inducible under limiting dilution conditions in healthy long-lived allogeneic chimeras, although these chimeric mice were devoid of any histological or clinical signs of graft-versus-host disease.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Der Chirurg 67 (1996), S. 1016-1019 
    ISSN: 1433-0385
    Keywords: Key words: Osteomyelofibrosis ; spenectomy. ; Schlüsselwörter: Osteomyelofibrose ; Splenektomie.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung. Die Osteomyelofibrose (OMF) ist eine myeloproliferative Erkrankung, bei der es durch Fibrosierung und Sklerosierung zu einer Verödung des Knochenmarks kommt. Kompensatorisch findet in Leber und Milz extramedulläre Hämatopoese statt. Die resultierende Splenomegalie kann ihrerseits durch lokale Kompression, Thrombocytopenie und hämolytische Anämie zu bedrohlichen Symptomen führen. Die Splenektomie ist bei diesen Patienten trotz ihrer Risiken die einzig erfolgversprechende Therapie.
    Notes: Summary. Osteomyelofibrosis is a myeloproliferative disorder in which fibrosis and sclerosis finally lead to bone marrow obliteration. Liver and spleen compensate for bone marrow loss with extramedullary hematopoesis. In some patients the resulting splenomegaly causes severe symptoms such as local compression, thrombocytopenia and hemolytic anemia. In such patients, splenectomy is the only promising treatment, although it represents a significant risk.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 40 (1980), S. 297-303 
    ISSN: 1432-0584
    Keywords: Macrophagen ; Silika ; Erythropoese stimulierender Faktor ; Erythropoetin ; Macrophages ; Silica ; Erythropoietic stimulating factor release ; Erythropoietin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary An erythropoietic stimulating factor (ESF) can be detected in the supernatant from fetal liver and adult bone marrow and spleen cells when preincubated with the macrophage-specific cytotoxic agent, silica. Stimulation is observed in 12-day fetal liver CFU-E cultures in the absence of added erythropoietin (Ep). The concentration of ESF in the supernatant added to CFU-E cultures is dependent on the preincubated cell dose and the volume added. The stimulating activity is abolished when mice are hypertransfused and increased above normal values when mice are bled. A concentrated silicatreated spleen supernatant was able to stimulate erythropoiesis in the polycythemic mouse bioassay. It is concluded that the ESF is similar, if not identical, to Ep.
    Notes: Zusammenfassung Aus Zellsuspensionen von foetaler Leber, erwachsenem Knochenmark und Milz kann mittels Silika, einer makrophagenspezifischen zytotoxischen Substanz, ein Erythropoese stimulierender Faktor (ESF) freigesetzt werden. Dieser Faktor wird in Abhängigkeit von der Zelldosis freigesetzt und stimuliert sowohl foetale CFU-E-Kulturen als auch, nachdem er konzentriert wurde, die Erythropoese in polyglobulen Mäusen. Es ist daher wahrscheinlich, daß dieser ESF mit dem Erythropoetin identisch ist. Die Freisetzung dieses ESF aus Makrophagen von Mäusen wird durch eine experimentelle Polyglobulie unterdrückt und durch eine Anämie erhöht. Die Rolle dieses Makrophagen-Erythropoetins bei der Regulation der Erythropoese muß weiter abgeklärt werden.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 44 (1982), S. 101-105 
    ISSN: 1432-0584
    Keywords: Hematopoietic progenitor cells ; Isopycnic density centrifugation ; Percoll ; Ficoll-Metrizoate ; Albumin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Hematopoietic progenitor cells were fractionated on continuous and discontinuous Percoll density gradients. It could be shown, that Percoll provides a suitable gradient medium for analytical as well as preparative density gradient procedures without major methodological problems. Advantages compared to albumin and Ficoll-Metrizoate are discussed.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 48 (1984), S. 11-18 
    ISSN: 1432-0584
    Keywords: Cephalosporines ; Semisynthetic penicillins ; Drug induced granulocytopenia ; Drug induced agranulocytosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Within one year we observed in the same intensive care unit seven severe polytraumatic patients with agranulocytosis (AG) associated with treatment by semisynthetic penicillins or cephalosporines combined with aminoglycosides. Antibiotics were given because of severe bacterial respiratory or generalised infections. Five patients died, four of them without haematological remission. Bone marrow aspirates showed hypoplasia of granulopoiesis due to a lack of mature cells. Leukocyte and granulocyte counts in the blood declined continuously over a period of 8 to 11 days. In average, minimal granulocyte counts occurred after 21 days of hospitalisation and 14 days of antibiotic drug exposure. Beside the incriminated antibiotics all patients were treated sporadically with other agents which may cause AG. Granulocyte kinetics and serial bone marrow examinations of one patient suggest a phenothiazine type of AG, which is caused by a toxic damage of granulopoiesis. Declining absolute granulocyte counts in the blood together with persisting high temperatures during antibiotic treatment should give rise to the suspicion of a beginning AG.
    Type of Medium: Electronic Resource
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