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  • Digitale Medien  (3)
  • 1990-1994  (3)
  • 1920-1924
  • 1994  (3)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Journal of cancer research and clinical oncology 120 (1994), S. 331-347 
    ISSN: 1432-1335
    Schlagwort(e): Mesothelioma-like carcinosis ; Pseudo-mesotheliomatous tumor of the pleura ; Differential diagnosis ; Metastases ; Etiology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The 72 mesothelioma-like tumors of the pleura (MLTP) found among 33 500 autopsy cases collected over more than 30 years are reviewed. MLTP have a worse prognosis than the 106 cases of pleural mesothelioma autopsied in our institutes with regard to survival time and metastatic spread. In MLTP, adenocarcinomas predominate with a wide range of histological and cytological variation and prominent development of connective tissue having its origin in the periphery of the lung. These intrapulmonary primary tumors often fulfill the criteria of pulmonary scar cancer. Etiologically, there is no correlation between the origin of this tumor and smoking or exposure to asbestos. The absence of mucus formation and glandular differentiation, together with the presence of spindle-shaped carcinoma components and strong mesothelial or stroma proliferation, can make the differential diagnosis between this tumor type and mesothelioma difficult. Immunohistological investigations were performed on 11 cases with antibodies against intermediate filament proteins, vascular endothelium, collagen IV, macrophage antigens, carcinoembryonic antigen (CEA), LeuM1, and the antibody BerEP4. Our investigation shows that a battery of several tumor markers, such as antibodies against LeuM1, CEA, and the antibody BerEP4, as well as staining with periodic acid/Schiff/diastase discriminate primary from secondary pleural neoplasms, whilst intermediate filament proteins alone are of little diagnostic value.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Current genetics 26 (1994), S. 535-541 
    ISSN: 1432-0983
    Schlagwort(e): Mitochondrial genome ; Plasmid-like DNA ; Date-palm
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract We report here the identification and characterization of two minicircular plasmid-like DNAs isolated from mitochondria of a moroccan date-palm variety. Both molecules were cloned and used as probes in Southern analyses of mitochondrial and total-cellular DNA. Evidence was obtained that these plasmid-like DNAs crosshybridized but did not show any homology to nuclear, chloroplastic, or main mitochondrial genomes. Sequence analysis revealed that both minicircles, 1 346- and 1 160-bp long, share several stretches of homology, the most important consisting of three identical clusters of lengths 42, 47 and 38 bp. In contrast, no major homology was observed with the other higher-plant plasmid-like DNAs reported so far. Sequence analysis also revealed the presence, in the same strand of one of the minicircles, of two open reading frames potentially encoding proteins 89 and 86 amino acids in length. Interestingly, Northern analyses, using single strands of each minicircle as probes, showed the presence of two transcripts hybridizing only with the strand bearing these two open reading frames. However, computer-assisted comparison of the predicted polypeptide sequences with a protein-sequence library failed to detect any significant homology to known sequences.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    ISSN: 1432-2242
    Schlagwort(e): Wheat ; Somatic tissue culture ; Regeneration ; Reciprocal crosses ; Mitochondrial DNA variability
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The transmission of a structurally-hypervariable fraction of the mitochondrial genome has been studied in 42 F1 progenies obtained from reciprocal crosses between self-pollinated alloplasmic wheat plants regenerated after long-term somatic embryogenesis. This fraction of the genome is maternally and stoichiometrically inherited. In contrast, some additional restriction fragments specific to regenerated plants display a more complex mode of sexual transmission: one of the additional fragments was stoichiometrically and systematically inherited whereas two others were detected only in certain F1 hybrids. Assuming that the detection, by Southern analysis, of such a fragment in regenerated plants is due to the amplification of a pre-existing substoichiometric molecule generated by the activation of a rare recombination event, our results suggest that the probability of detecting a novel fragment in the F1 hybrids could be determined by the length of the repeated sequence at which recombination occurs.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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