Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Functional dendritic cells (DC) are professional antigen-presenting cells (APC) and can be generated in vitro from healthy as well as from leukaemic cells from AML patients giving rise to APC of leukaemic origin presenting leukaemic antigens. In a comparative methodological analysis of 50 AML samples, we could already show that leukaemia-derived DC can regularly be generated under serum-free culture conditions. In this study, we describe the generation and characterization of DC from different mononuclear cell (MNC) fractions from 24 myelodysplastic syndrome (MDS) patients under those different serum-free culture conditions, determine the optimal culture conditions and compare the results with that from 23 healthy donors. In parallel cultures, we compared DC harvests after 7- or 14-day culture, with total or adherent MNC or T-cell-depleted MNC or PB or BM–MNC, thawn or fresh MNC, in Xvivo or CellGro serum-free media, ±10% autologous plasma or ±FL. In detail, we could show that MDS–DC harvests compared to healthy DC were higher after 10- to 14-day culture; total or adherent PB or BM–MNC fractions yield comparable DC counts; however, from MACS-depleted MNC fractions or thawn MNC lower DC counts can be generated. Whereas the addition of FL increases the DC harvest, the addition of autologous plasma in many cases has inhibitory influence on DC maturation, CellGro and Xvivo media yield comparable DC counts. Optimal harvest of vital and mature DC from MDS samples was obtained with a GM-CSF, IL-4, FL and TNF-α containing serum-free Xvivo medium after 10–14 days of culture (18/26% DC; 54/64% vital DC; 59/51% mature DC were generated from MDS/healthy MNC samples). Surface marker profiles (e.g. costimulatory antigen expression) of DC obtained from MDS samples were comparable with that of healthy DC. The leukaemic derivation of MDS–DC was demonstrated by the persistence of the clonal cytogenetic aberration in the DC or by coexpression of leukaemic antigens on DC. Autologous T-cell activation of leukaemia-derived DC was demonstrated in cases with MDS. Autologous T cells proliferate and upregulate DC-contact-relevant antigens. We are the first who demonstrate that the generation of leukaemia-derived DC is feasible not only in AML but also in MDS under serum-free culture conditions giving rise to DC with comparable characteristics as healthy DC and offering an antileukaemia-directed immunotherapeutical vaccination strategy in AML and MDS.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Functional dendritic cells (DC) are professional antigen-presenting cells (APC) and can be generated in vitro from healthy as well as from leukaemic cells from acute myeloid leukemia (AML) patients giving rise to APC of leukaemic origin-presenting leukaemic antigens. We describe the generation and characterization of DC from different mononuclear cell (MNC) fractions from 50 AML patients under different serum-free culture conditions, determine the optimal culture conditions and compare the results with that from 23 healthy donors. In parallel cultures, we compared DC harvests after 7- or 14-day culture, with total or adherent MNC or T-cell depleted MNC or peripheral blood (PB) or bone marrow-MNC (BM–MNC), thawn or fresh MNC, in Xvivo or CellGro serum-free media, ±10% autologous plasma or ±FL. In detail, we could show that AML–DC harvests were higher after 10–14 days culture (healthy DC: 7 days); total or adherent PB or BM–MNC fractions yield comparable DC counts, however, from magnetic cell sorting (MACS)-depleted MNC fractions or thawn MNC lower DC counts can be generated. Whereas the addition of FL increases the DC harvest, the addition of autologous plasma in many cases has inhibitory influence on DC maturation. CellGro and Xvivo media yield comparable DC counts. Optimal harvest of vital and mature DC from AML samples was obtained with a granulocyte/macrophage-colony stimulating factor, interleukin-4, FL and tumour necrosis factor-α-containing serum-free Xvivo medium after 10–14 days of culture (36/26% DC; 38/64% vital DC; 46/51% mature DC were generated from AML/healthy MNC samples). Surface marker profiles (e.g. costimulatory antigen expressing) of DC obtained from AML samples were comparable with that of healthy DC. The leukaemic derivation of AML–DC was demonstrated by the persistence of the clonal cytogenetic aberration in the DC or by coexpression of leukaemic antigens on DC. Autologous T-cell activation of leukaemia-derived DC was demonstrated in cases with AML. Autologous T cells proliferate and upregulate DC-contact-relevant antigens. We demonstrate that the generation of leukaemia-derived DC is feasable in AML under serum-free culture conditions giving rise to DC with comparable characteristics as healthy DC and offering an anti-leukaemia-directed immunotherapeutical vaccination strategy in AML.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary Chronic graft-versus-host disease after bone marrow transplantation presents, in a few cases, as mild to severe scleroderma-like changes. Patients with chronic graft-versus-host disease with and without sclerodermatous skin changes were analysed for antinuclear autoantibodies (ANA) and antinucleolar autoantibodies (ANoA) and the results correlated with disease symptoms and histocompatibility locus antigen (HLA) pattern. Nineteen patients with chronic graft-versus-host disease and scleroderma-like skin changes. 18 with chronic graft-versus-host diseae without scleroderma. and 17 controls on immunosuppressive treatment were screened for ANA and ANoA using enzyme-linked immunosorbent assay, immunodiffusion and immunoblot techniques. Four patients with severe scleroderma had antibodies to topoisomerase I. two had antibodies against PM-Scl. both characteristic serological findings in idiopathic systemic scleroderma. One patient had La/SSB antibodies and, in three cases, antibodies to the nucleolar antigen C23 (nucleolin) could be identified. A possible correlation between antinucleolin antibodies and disease activity was observed. HLA-Al. -B1. and -B2 were found significantly more often in patients with scleroderma-like symptoms in comparison to patients without scleroderma-like symptoms. Chronic graft-versus-host disease with seleroderma-like manifestations can be associated with the occurrence of ANA specific for idiopathic scleroderma. The development of seleroderma after bone marrow transplantation might have a HLA-linked genetic background.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1432-1440
    Keywords: Bone-marrow-transplantation ; Acuteleukemia ; Aplastic-anemia ; Paroxysmal-nocturnal-hemoglobinuria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Eleven adults have been transplanted for various reasons between July 1979 and July 1982: 2 with aplastic anemia (AA), 1 with paroxysmal nocturnal hemoglobinuria (PNH), 8 with acute leukemia (AL). Four patients suffered from acute lymphocytic leukemia (ALL) and four from acute non-lymphocytic leukemia (ANLL). Two of them were transplanted in relapse, 1 in a partial remission, and 5 in complete remission. All patients were in their late stage of disease. The PNH-patient had an identical twin, 8 patients had an HLA- and MLC compatible sib, 1 an unrelated donor, and 1 was transplanted from his father. Four patients are alive, 2 more than 3 years: 1 with AA and 1 with ALL who was transplanted in relapse. Six patients died of infectious complications (4 of interstitial pneumonia, 1 of a candidasepsis, 1 of acute toxoplasmosis). Patients living more than 3 weeks had a take. Acute graft-versus-host (GvH) disease did not present a major problem. All patients received methotrexate for GvH-prophylaxis, in three instances the marrow was additionally pre-incubated with anti-T-cell globulin.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1432-1440
    Keywords: Bone marrow transplantation ; Acute leukaemia ; Knochenmarktransplantation ; akute Leukämie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Im Rahmen der Arbeitsgemeinschaft Knochenmarktransplantation München wurden von August 1975 bis Juni 1980 insgesamt 17 Patienten mit rezidivierter, akuter Leukämie mit Knochenmark von HLA-identischen Geschwistern transplantiert. Die antileukämische und immunsuppressive Vorbehandlung bestand aus BCNU, Cytosin-Arabinosid, Cyclophosphamid in hoher Dosierung und Ganzkörperbestrahlung mit etwa 9 Gy Körpermitteldosis an einer60Co-Doppelbestrahlungsanlage. Die Prophylaxe einer Graft-versus-Host Krankheit (GvHK) wurde in allen Fällen mit Methotrexat durchgeführt, bei neun Patienten wurde als zusätzliche GvHK-Prophylaxe das Knochenmark mit Anti-T-Zell-Globulin inkubiert, von dem die Antikörper gegen hämopoetische Stammzellen absorbiert waren. Zwei von fünf auswertbaren Patienten, die unbehandeltes Knochenmark erhalten hatten, entwickelten chronische GvHK, während kein Patient nach ATCG-Inkubation des Knochenmarkes eindeutige GvH-Krankheit bekam. Sechs Patienten leben in Vollremission zwischen einem und 33 Monaten nach Knochenmarktransplantation (KMT). Fünf Patienten starben mit Rezidiven zwischen 3 1/2 und 24 Monaten nach KMT, drei Patienten mit interstitieller Pneumonie innerhalb von 3 Monaten nach KMT und drei Patienten innerhalb von 4 Wochen ohne ausreichende Knochenmarkfunktion. Vier von 13 Patienten, die vor mehr als 6 Monaten transplantiert wurden, überleben zur Zeit 11, 14, 19 und 33 Monate in Vollremission. Unsere Ergebnisse bestätigen, daß selbst in fortgeschrittenen Stadien akuter Leukämie durch KMT noch langfristige Remissionen erreichbar sind.
    Notes: Summary Seventeen patients with relapsed, acute leukemia were grafted with bone marrow from HLA-identical siblings by the ‘Munich Cooperative Group for Bone Marrow Transplantation’ during the period from August 1975 to June 1980. The antileukemic and immunosuppressive conditioning treatment consisted of high doses of Bischlorethyl nitrosourea, Cytosine-Arabinoside and Cyclophosphamide, as well as, total body irradiation of about 9 Gy (midline body dose) from dual60Cobalt sources. Methotrexate was given to all patients for prophylaxis of graft-versus-host disease (GvHD). Nine patients received marrow that was treated with anti-T-cell globulin (ATCG) “in vitro”. — Crossreacting antibodies against hemopoietic stem cells were removed by absorption. Two of 5 evaluable patients given untreated marrow developed chronic GvHD, while patients given ATCG-treated marrow did not show unequivocal symptoms of GvHD. Six patients are in complete remission one to 33 months following bone marrow transplantation (b.m.t.) Five patients died with relapses of leukemia between 3 1/2 and 24 months following b.m.t., 3 patients died with interstitial pneumonia within 3 months of b.m.t. and 3 patients died with insufficient graft function within 4 weeks of b.m.t. Four of thirteen patients that were grafted more than 6 months ago are presently alive and in continuous complete remission at 11, 14, 29 and 33 months following b.m.t. Our results confirm that longterm remissions can be obtained with b.m.t. in patients with acute leukemia in advanced stage.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1432-1440
    Keywords: Bone marrow transplantation ; Aplastic anaemia ; Knochenmarktransplantation ; Aplastische Anämie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Im Rahmen der Arbeitsgemeinschaft Knochenmarktransplantation — München (AG-KMT) wurden vom März 1975 bis Mai 1980 insgesamt 12 Patienten wegen schwerer, aplastischer Anämie mit Knochenmarktransplantation (KMT) behandelt. Sechs Patienten überleben derzeit mit normalem Blutbild und Knochenmark zwischen 10 Monaten und mehr als 5 Jahren nach KMT von HLA-identischen Geschwistern, eine Patientin steht noch in ambulanter Behandlung wegen lokalisierter, chronischer Graft-versus-Host Krankheit (GvHK), fünf Patienten sind klinisch gesund. Sechs Patienten starben, ein Patient starb am Tag vor KMT mit Hirnblutung, drei Patienten 32, 40 und 55 Tage nach KMT an den Folgen der Transplantatabstoßung, einer an schwerer GvHK 85 Tage nach KMT und einer 87 Tage nach KMT vermutlich an interstitieller Pneumonie nach Hirnblutung. Drei von 6 Patienten, die nur mit Cyclophosphamid (CY) vorbehandelt waren, starben infolge Abstoßung des Transplantates. Zwei erwachsene Patienten, die mit CY und „total lymphoid irradiation“ vorbehandelt waren, und drei Kinder, die nach KMT unbestrahlte Leukocytenkonzentrate von Knochenmarkspender erhalten hatten, stießen das Transplantat nicht ab. Die Ergebnisse der AG-KMT sind vergleichbar denen großer, spezialisierter Zentren für KMT und zeigen die Möglichkeiten einer Heilung schwerer aplastischer Anämien durch KMT von HLA-identischen Geschwistern. Die Erfolge sind besser bei frühzeitiger KMT.
    Notes: Summary From March 1975 until May 1980 twelve patients with severe aplastic anemia were grafted with bone marrow from HLA-identical siblings by the Munich Cooperative Group for Bone Marrow Transplantation. Six patients are alive between 10 months and more than 5 years after grafting with normal blood values and marrow. One patient is treated as an out patient for chronic localized graft-versus-host disease (GvHD), five patients are well and without treatment. Six patients have died, one patient with a cerebral hemorrhage the day before transplantation, three patients following rejection of grafts 32, 40 and 55 days after grafting, one patient with severe GvHD 85 days after grafting and one patient, probably with interstitial pneumonia, following cerebral hemorrhage. Three of 6 patients who were conditioned with Cyclophosphamide (CY) only died following rejection of the graft. Two adults who were conditioned with CY and “total lymphoid irradiation” and three children, who were given unirradiated leukocyte concentrates from the marrow donor after grafting, did not reject their grafts. The results of the Munich-Cooperative Group for Bone Marrow Transplantation are comparable to those of large, specialized centers for bone marrow transplantation, they indicate possibilities of cure of severe aplastic anemia by marrow grafts from HLA-identical siblings. They confirm that better results are obtained with earlier transplantation in the course of the disease.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Der Onkologe 5 (1999), S. 688-694 
    ISSN: 1433-0415
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Das Immunsystem hat die Fähigkeit, bösartige Zellen zu erkennen und unter gewissen Umständen zu zerstören. Spontane Regressionen von Tumoren bei Patienten zeugen von dem Vorhandensein und der Effektivität einer natürlichen Immunüberwachung. Eine effektive Tumorabwehr setzt das Zusammenspiel von verschiedenen Zellen und Faktoren voraus, aus der idealerweise eine Tumorabstoßung resultiert. Dieses Zusammenwirken der Zellen zu verstehen, ist die Voraussetzung für die Entwicklung einer Immuntherapie gegen Krebs. In den letzten Jahren wurden malignomreaktive T-Zellen als Effektorzellen der immunologischen Tumorabwehr erkannt. Dieser Mechanismus soll genutzt werden durch den adoptiven Transfer von tumorreaktiven T-Zellen in Patienten mit malignen Erkrankungen.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Ein Junge mit schwerer Knochenmarkaplasie und ein Mädchen mit rezidivierender akuter lymphatischer Leukämie wurden nach entsprechender immunsuppressiver und antileukämischer Vorbehandlung mit Knochenmark von HL-A-identischen, MLC-negativen Geschwistern transplatiert. Beide Kinder sind 7 bzw. 2 Monate nach Knochenmarkaplasie oder akuter lymphatischer Leukämie im Rezidiv in Betracht gezogen werden, wenn HL-A-identische, MLC-negative Geschwister zur Verfügung stehen.
    Notes: Summary A boy with severe Aplastic Anemia (AA) and a girl with Acute Lymphoblastic Leukemia (ALL) in relapse have been grafted with marrow from HL-A identical, mixed leukocyte culture (MLC) negative siblings after appropriate immunosuppressive and antileukemic therapy. Both of them are well 7 and 2 months after transplantation respectively. Bone marrow transplantation should be considered in children with AA and ALL in relapse, if HL-A identical, MLC negative sibling are available.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 1432-0584
    Keywords: Canine lymphocytes ; Monoclonal antibodies ; Mixed lymphocyte culture ; Cell-mediated lympholysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Functional characterization of subsets of T lymphocytes is essential for transplantation studies in dogs, as it is in other species. We studied the function of T cells separated by two mouse monoclonal antibodies recognizing complementary subsets — an antibody directed to canine T cells (MdT-P1) with an up-regulating function, and an antibody directed to human CD 8 (MT811) that cross-reacts with down-regulating canine T cells. Immunorosetting with sheep red blood cells and Percoll gradient allowed us to study depleted and enriched fractions. Their function was tested in mixed lymphocyte culture (MLC), cell-mediated cytotoxicity (CML), and coculture with B cells in a hemolytic plaque assay (PFC). In MLC, MdT-P1-positive cells showed a high proliferative response, and MT811-positive cells responded poorly to allogeneic cells. Vice versa, MT811-negative cells responded strongly, and MdT-P1-negative cells were poor responders but strong stimulators. Effector cells of CML were separated following 8 days of culture and prior to mixing with target cells. Enriched and depleted fractions with either antibody showed low cytotoxic activity as compared with unseparated cells. When added to unseparated effector cells MT811-positive cells suppressed cytotoxicity. B cells were obtained by resetting with staphylococcal protein A (SPA). Their immunoglobulin production was studied following 6 days of culture stimulated by pokeweed mitogen in a reverse hemolytic plaque assay. Again, MT811-positive cells added to the culture suppressed, and MT811-negative cells enhanced immunoglobulin production. In conclusion, immunorosetting with two monoclonal antibodies allowed us to distinguish subpopulations of canine T cells with up-regulating (helper/inducer) from those with down-regulating (suppressor) activity.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1432-0584
    Keywords: Hematopoietic progenitor cells ; Dog ; Monoclonal antibodies ; CFU-GM ; Autologous bone marrow transplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Canine hematopoietic progenitor cells were characterized by separation with monoclonal antibodies. Depleted and enriched fractions were studied for growth of CFU-GM in semisolid agar and for repopulating capacity of lethally irradiated dogs. CFU growth was not reduced by depletion of marrow using monoclonal antibodies F 3-20-7 (anti-dog Thy-1), MT606 (anti-human CD6), and IOT2a (anti-human DR). CFU growth was variable following treatment with the anti-canine T-cell antibody MdT-P1 and immunomagnetic bead separation. It was regularly enriched when MdT-P1 treatment was followed by immunorosetting with staphylococcal protein A-loaded sheep red blood cells and density gradient separation. Lethally irradiated dogs were reconstituted by autologous marrow depleted of MdT-P1-positive cells using immunorosetting and density gradient centrifugation, whereas immunomagnetic bead-depleted marrow was ineffective. Fluorescence-activated cell sorting showed enrichment of hematopoietic progenitor cells in the weakly MdT-P1-positive fraction.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...