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  • Bone marrow cytogenetics and cytochemistry  (1)
  • Pancreatic neoplasms  (1)
  • 1
    ISSN: 1432-0584
    Keywords: Myelomonocytic ; Subacute and chronic leukemia ; Bone marrow cytogenetics and cytochemistry ; Lysozyme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary 44 patients suffering from myelomonocytic leukemia (MML) have been observed over the last four years. They have been subclassified in acute myelomonocytic and acute monoblastic leukemias (AMML, n = 12; AMoL, n = 10), subacute myelomonocytic leukemias (SMML, n = 13), and chronic myelomonocytic leukemias (CMML, n = 9) on the basis of bone marrow cytology(blast and promonocyte counts, maturation of granulopoesis) and cytochemical findings (peroxydase and unspecific esterase reaction). This subclassification has been proved to be of prognostic relevance by its good correlation with the mean survival times (AMML: 4.5 months, AMoL: 2.4 months, SMML: 8 months, CMML: 18 months). The acute forms have been treated in general with combined cytostatic chemotherapy, whereas SMML and CMML have been treated this way only in case of progression to an acute phase. These progressions to an AMML have been observed more often and earlier in subacute forms than in chronic forms. The diagnosis of SMML and CMML is supported by the finding of sea-blue histiocytes in the bone marrow, increased lysozyme levels in serum and urine and by the absence of the Philadelphia-Chromosome.
    Notes: Zusammenfassung 44 Patienten mit myelomonozytärer Leukämie (MML) wurden während der letzten vier Jahre beobachtet. Eine Einteilung in akute myelomonozytäre und akute monoblastäre Leukämien (AMML, n = 12; AMoL, n = 10), subakute myelomonozytäre Leukämien (SMML, n = 13) und chronische myelomonozytäre Leukämien (CMML, n = 9) wurde aufgrund der Knochenmarkzytologie (Blasten- und Promonozytenanteil, Ausreifung der Granulopoese) und zytochemischer Befunde (Peroxydase- und unspezifische Esterase-Reaktion) vorgenommen. Diese Einteilung erwies sich als prognostisch relevant durch eine gute Korrelation mit den mittleren Überlebenszeiten (AMML: 4,5 Monate, AMoL: 2,4 Monate, SMML: 8 Monate, CMML: 18 Monate). Die akuten Verlaufsformen wurden in der Regel kombiniert zytostatisch behandelt, während SMML und CMML nur beim Übergang in eine akute Phase zytostatisch therapiert wurden. Derartige Übergänge in AMML wurden bei den subakuten Verlaufsformen häufiger und eher als bei den chronischen beobachtet. Zur Diagnose SMML, CMML trägt das Vorkommen seeblauer Histiozyten im Knochenmark, eine Lysozymerhöhung in Serum und Urin und das Fehlen des Philadelphia-Chromosoms bei.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2307
    Keywords: Stomach neoplasms ; Pancreatic neoplasms ; Cell differentiation ; Histocompatibility antigens ; Interferon gamma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Two new cell lines from stomach cancers and one from a pancreatic carcinoma are presented. MZ-GC-1 was established from a hepatic metastasis of a well differentiated gastric adenocarcinoma. MZ-GC-2 was derived from ascites induced by a poorly differentiated gastric adenocarcinoma. MZ-PC-1 originated from the pleural effusion of a moderately well differentiated pancreatic ductal adenocarcinoma. MZ-GC-1 cells were adherent and partially polarized, connected tightly via desmosomes. In contrast MZ-GC-2 cells consisted of slightly adherent or floating subpopulations and displayed no desmosomes. MZ-PC-1 cells were adherent and showed polarized growth, connected by apical junctional complexes. Cell doubling times were 7 days for MZ-GC-1 and 45 h for MZ-GC-2 and MZ-PC-1 cells. MZ-GC-2 and MZ-PC-1 gave rise to nude mouse tumours, resembling the original lesions. Chromosome analysis of the cell lines revealed a high range of numerical abnormalities. Each cell line had cytokeratin patterns fitting well to typical in vivo patterns. Furthermore the cell lines expressed a panel of antigens typical for gastrointestinal epithelia. Unique for MZ-PC-1 were high amounts of secreted Ca19-9. γ-Interferon enhanced HLA-class I antigens up to twofold and induced ICAM-1 expression on each cell line. HLA-class II antigens were differentially enhanced by γ-interferon. Due to their distinct characteristics the three tumour cell lines may be useful models in the investigation of the cell biology and immunogenicity of gastrointestinal tumours.
    Type of Medium: Electronic Resource
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