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  • Life and Medical Sciences  (4)
  • Immunohistology  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 391 (1981), S. 9-31 
    ISSN: 1432-2307
    Keywords: Intestinal lymphoma ; “Benign ulcerative non-granulomatous jejunitis” ; Coeliac disease ; Ulcerative colitis ; Immunohistology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The histology and immunohistology of twenty-seven malignant non-Hodgkin's lymphomas of the intestinal tract were studied. Nine of these cases were in the small intestine, ten in the ileocaecal region, two in the appendix and four in the large intestine. In one case, several locations in the gastrointestinal tract were involved. The so-called Kiel-Classification was applied. We have found thirteen lymphomas with low grade (lymphocytic, lymphoplasmacytic, centrocytic, centroblastic/centrocytic) and fourteen with high grade of malignancy (centroblastic, lymphoblastic, immunoblastic). For most of the lymphoplasmacytic and immunoblastic lymphomata a monoclonal pattern of intracellular immunoglobulin (IgM/kappa) was identified by the immunoperoxidase method. Tumour cells of lymphocytic, centrocytic, centroblastic/centrocytic, centroblastic and lymphoblastic lymphomas were always Ig-negative. The immunoperoxidase technique helped considerably in distinguishing between (monoclonal) malignant lymphomas and (polyclonal) lympho- or immunoproliferative processes. Six out of twenty-seven malignant lymphomas had developed from immuno-inflammatory diseases of the gut. Four of these were complications of coeliac disease. One had developed from a “malabsorptive” dermatitis herpetiformis Duhring, and one from a complication of a long-standing ulcerative colitis. In two patients with coeliac sprue and “malabsorptive” dermatitis herpetiformis Duhring respectively the ulcerating small intestinal lymphomas were initially misinterpreted as “benigne ulcerative non-granulomatous jejunitis”. The evidence from the literature summarized suggests strongly that the benign non-granulomatous jejunoileitis, lymphomatous ulcer, intestinal “pseudolymphoma” and malignant lymphoma, when associated with villous atrophy of adjacent mucosa and malabsorption symptoms, are all one condition, namely, malignant lymphoma.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 65 (1987), S. 53-60 
    ISSN: 1432-1440
    Keywords: Thymic hyperplasia ; Lymphofollicular hyperplasia of the thymus ; Immunohistology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The so-called lymphofollicular hyperplasia, which is caused by the occurrence of hyperplastic lymph follicles within the organ, is constantly associated with autoimmune diseases (e.g., myasthenia gravis) and in rare instances with malignant tumors. The architecture of lymphofollicular hyperplasia was studied immunohistochemically using antibodies against epithelial, vascular, lymphocytic, and histiocytic antigens. There is evidence, that the configuration, microtopography, cellular composition, and immunohistological findings of the lymph follicles with germinal centers in the myasthenic thymus are essentially the same as in those occurring in lymph nodes and in other lymphatic tissue. Furthermore it could be shown that the follicles originate in the interlobular septal space and displace the thymic parenchyma by extension.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 70 (1967), S. 265-273 
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The kinetics of RNA synthesis have been studied under various growth conditions using synchronized Tetrahymena pyriformis GL. The curves obtained are approximately linear in growth-supporting media but vary under other circumstances. The presence of amino acids in the medium stimulates RNA synthesis in Tetrahymena as it does in bacteria. Since these induced variations do not influence the essential features of the pre-cytokinetic period it is inferred that fluctuations in the rate of RNA synthesis described by others are probably not essential features of temperature-induced synchrony. In addition, the translational stability of division-related templates at synchronizing temperatures has been investigated. The synthesis of proteins necessary for cytokinesis is shown to be greatly reduced under conditions simulating a heat-shock. Inhibitor studies using cycloheximide indicate that protein synthesis is required longer into the cytokinetic phase than had previously been thought. Collectively the data are all compatible with the hypothesis that synthesis of division-related proteins is drastically reduced in heat-shocked Tetrahymena and that the basis for this reduction is hydrolysis of template RNA without concurrent translation.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Intracellular ribonuclease from the ciliate Tetrahymena pyriformis GL was purified 10-fold. After preheating for 20 minutes at 100°C of the ribonuclease preparation 80% of its activity was lost. Preheating under the same conditions, however, in the presence of RNA, did not affect the enzyme activity. Between 0°C and 41°C the apparent activation energy was 15,600 cal per deg. per mole.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 68 (1966), S. 203-205 
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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