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  • 1
    ISSN: 1432-1335
    Keywords: Stomach ; Signet ring cell carcinoma ; Cell turnover ; Tritiated thymidine autoradiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Signet ring cell carcinoma was induced in canine stomachs by N-ethyl-N′-nitro-N-nitrosoguanidine, and modes of cell proliferation and turnover in the carcinoma were studied by 3H-thymidine autoradiography in conjunction with morphometric analysis. From 2 to 15 months after the cessation of 8 months carcinogen treatment, carcinomas in an early stage were obtained. Most of the cancer tissues confined to the lamina propria showed a layered structure. This comprised three layers; the superficial and the deep layer were composed of signet ring cells, and the middle layer was composed of small round cells. The dogs were labeled with 3H-thymidine by s.c. injection and by local infusion of the celiac artery. Flash-labeled autoradiographs revealed that most 3H-thymidine incorporating cancer cells were located around the middle layer, with a small amount of mucin. Using a pulse labeling experiment, those labeled carcinoma cells were shown to migrate from the middle layer towards the surface. Morphometric analysis of the autoradiographs showed that the small cells in the middle layer migrated upwards and produced mucin to become full-blown signet ring cells by 5.5 days. In 15 days, most labeled cancer cells in the superficial layer had disappeared. This mode of cellular turnover appeared to mimic a cell renewal system of the normal gastric mucosa. If the cancer cells turn over in this way, the tumor must grow slowly, remaining as an intramucosal cancer for a relatively long period.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International journal of legal medicine 101 (1988), S. 15-20 
    ISSN: 1437-1596
    Keywords: Forensic immunology, Gm ; Gm typing, ELISA, Dot immunobinding ; Monoclonal antibody ; Forensische Immunologie, Gm ; Gm-Typisierung, ELISA, Punkt-Immunobindung ; Monoklonale Antikörper
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Es werden einfache schnelle Methoden zur G3m(21)-Typisierung mit enzymisch markierten monoklonalen Anti-G3m(21)-Antikörper beschrieben. Bei G3m(21)-Typisierung mit ELISA wurden Mikrotitertüpfel mit zu untersuchendem Antigen direkt überzogen. Das Antigen wurde mit dem enzymisch markierten monoklonalen Antikörper nachgewiesen. Eine Punkt-Immunobindung Methode wurde geschaffen, um das Prozedere noch weiter vereinfachen zu können. Das Antigen in der Probe wurde auf einer Nitrozellulosemembran appliziert und mit dem enzymisch markierten monoklonalen Antikörper erfolgreich nachgewiesen. Diese Methoden, besonders die Punkt-Immunobindung, sind für die forensische Praktik geeignet.
    Notes: Summary Simple, rapid methods are described for G3m(21) typing with peroxidase-labeled monoclonal anti-G3m(21) antibody. In G3m(21) typing by ELISA, microtiter wells were coated directly with the test antigen, which was detected with the enzyme-labeled monoclonal antibody. To further simplify the procedure, a dot immunobinding method was developed. The antigen in the test serum applied onto a nitrocellulose membrane was successfully detected with the enzyme-labeled monoclonal antibody. These methods, particularly the dot immunobinding, are suitable for forensic casework because they are rapid and simple and require no technical skill.
    Type of Medium: Electronic Resource
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