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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 69 (1991), S. 981-987 
    ISSN: 1432-1440
    Keywords: Inflammatory bowel diseases ; Inflammatory mediators ; Crohn's disease ; Ulcerativecolitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Crohn's disease and ulcerative colitis are chronic inflammatory bowel diseases (IBD) of unknown etiology. They are characterized by an activation of intestinal mononuclear cells. Cytokines play a crucial role in the regulation of the functions of these cells. An increased synthesis of the cytokines interleukin-1 (IL-1), interleukin-6 (IL-6) and tumor necrosis factorα (TNFα), which are primarily synthesized by activated monocytes/macrophages has been described in patients with IBD. The synthesis of interleukin-2 (IL-2) and of interferonγ (IFNγ), which are produced by lymphocytes, on the other hand, has been found to be decreased. The published data are, however, not quite consistent. In patients with IBD there is not only a stimulation of the local cytokine production in the gut. The blood levels and the synthesis of the cytokines IL-1, IL-6 and TNFα by peripheral blood mononuclear cells are also increased, in particular in patients with Crohn's disease. Drugs, which are commonly used for the treatment of IBD impair the synthesis of these cytokines in monocytes/macrophages.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-2568
    Keywords: leukocyte scintigraphy ; technetium-99m-hexamethyl propylene amine oxine ; acute pancreatitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The infiltration of leukocytes has been linked to the pathophysiology of complicated or severe pancreatitis. We have tested the ability of leukocyte scintigraphy using technetium-99m-hexamethyl propylene amine oxine (HM-PAO) as label to demonstrate the localization of leukocytes in the pancreas during acute pancreatitis. Twenty-eight patients with acute pancreatitis (eight with biliary, 13 with alcoholic, and seven with unknown origin) were studied with leukocyte scintigraphy using planar imaging and single photon emission computed tomography (SPECT). Fourteen patients had a mild (group I), 11 a severe (group II), and three a lethal outcome (group III) of pancreatitis. All patients of group III, six of group II, and two of group I had a positive leukocyte scan. Thus, the sensitivity of leukocyte scintigraphy for the detection of a lethal course, of acute pancreatitis was 100%, of a severe course 54%, and of a severe or lethal course 64%. The specificity of a negative scan for a mild pancreatitis was 86%. Comparison of the results of leukocyte scintigraphy with those of contrast enhanced CT showed that six of eight patients with pancreatic necrosis in CT had a positive leukocyte scan, but only five of 20 patients without detectable pancreatic necrosis in CT. In summary, leukocyte infiltration into the pancreas during pancreatitis can be demonstrated by noninvasive leukocyte scintigraphy using technetium-99m-HM-PAO as label. A correlation between the severity of the disease and leukocyte infiltration exists.
    Type of Medium: Electronic Resource
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