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  • 1
    ISSN: 1432-2307
    Keywords: CYP2E1 ; Immunohistochemistry ; Pulmonary carcinoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Cytochrome P450 2E1 (CYP2E1) is a major xenobiotic-metabolizing enzyme but data concerning its extrahepatic expression are few. CYP2E1 can metabolically activate many procarcinogens and therefore its presence in the lung might play a role in bioactivation of procarcinogens, so we studied the expression and localization of CYP2E1 in primary pulmonary carcinomas and surrounding normal bronchial tissue from 28 patients. Seromucous glands showed expression of CYP2E1 in 19 and bronchial epithelium in 18 of the 28 samples of normal bronchial tissue. Thirteen of the corresponding cases of primary pulmonary carcinoma showed staining for CYP2E1. In 11 of these 13 cases, CYP2E1 was also present in normal bronchial tissue. There was no statistically significant difference in the expression of CYP2E1 between adenocarcinomas and squamous cell carcinomas. No association was observed between the expression of CYP2E1 in tumour tissue and normal bronchial tissue. However, there was a significant correlation between the expression of CYP2E1 in seromucous glands and bronchial epithelium (r=0.61, P〈0.01) of normal tissue. We conclude that CYP2E1 can be present in both normal and neoplastic bronchial tissue.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1437-160X
    Keywords: Iron deposits ; Rheumatoid arthritis ; Osteoarthritis ; Synovitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We investigated 86 synovial membranes from patients suffering either from rheumatoid arthritis (RA) or osteoarthritis (OA). Iron deposits in the synovial membrane were stained by the Prussian blue reaction, and the amount of stained iron was quantitatively assessed by microscope photometry. We found a statistically significant increase in iron deposits in the synovial membrane of RA patients when compared to OA patients. The amount of iron deposits correlated with the histological subtype of synovitis, those presenting with more exudative and proliferative features showing greater amounts of iron deposits. We also observed an inverse correlation between the haemoglobin concentration and erythrocytes in the serum and the amount of iron in the synovial membrane. From our data we concluded that iron deposits in the synovial membrane can contribute by several mechanisms, including activation of oxygen radicals, to the chronic inflammatory reaction in RA synovitis.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1437-160X
    Keywords: Rheumatoid arthritis ; Synovitis ; Synovial membrane ; Neo-synovial membrane ; Resynovectomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Neo-synovial membranes, which formed after “primary” synovectomy in 21 patients with rheumatoid arthritis (RA), were studied at resynovectomy. The clinical, histomorphological, and immunohistological data were compared with data derived from “primary” synovial membranes from RA and osteoarthritis (OA) patients. The clinical data suggest a less active rheumatoid inflammatory response after synovectomy. Histomorphologicaly, the synovitis in resynovectomized neosynovial membranes of RA revealed no qualitative differences when compared with synovitis in the “primary” synovium. However, the degree of the inflammatory rection evaluated by the different parameters was found to be distinctly lower. The immunohistological data correlated with these findings.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1437-1596
    Keywords: Key words Ganglion cells ; Hippocampus ; Immunohistochemistry ; Mean optical density (MOD) ; Morphine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Notes: Abstract To investigate the topography of morphine distribution in the human brain, a method has been developed to detect morphine immunohistochemically. In this study hippocampus tissue from victims of heroin overdose (blood morphine concentrations 220 ng/g–1500 ng/g; 6-MAM positive urine sample), known for its high concentration of μ-opiate receptors was used. The immunohistochemical staining was performed with an anti-morphine antiserum originally developed for radio-immuno-assays. In comparison with control specimens from cases of sudden death without morphine exposition or a history of heroin abuse, the brains from victims of heroin overdose showed selectively stained ganglion cells, axons and dendrites, suggesting a massive concentration of morphine in the neuronal structures.
    Type of Medium: Electronic Resource
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