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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: 1615-6722
    Keywords: Schlüsselwörter Hepatitis C ; Histologie ; Viruslast ; Transaminasen ; Genotyp ; Key Words Hepatitis C ; Histology ; Viral load ; Aminotransferases ; Genotype
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Background and Aim: According to the German consensus statement, the indication for treatment of HCV-RNA-positive chronic hepatitis C is not derived from histopathology but from elevated aminotransferases. The indication for liver biopsy has been discussed controversely. This study aimed at investigating the correlation between different biochemical and virological parameters and histological scores of inflammation and fibrosis in chronic hepatitis C. Patients and Methods: In a retrospective study, data of 126 patients with chronic hepatitis C who had undergone liver biopsy between January 1994 and March 1998 were analyzed. Histology was interpreted according to a defined numerical score of inflammation and fibrosis by a single pathologist. Scores of fibrosis and inflammation were correlated with biochemical and virological parameters. Results: Inflammatory grading showed a moderate but significant correlation with ALT (r = 0,33, p 〈 0.001), whereas staging of fibrosis did not correlate with ALT (r = 0.15). There was no association between grading or staging and HCV genotype (n = 110) or serum viral load (n = 57). Grading and staging showed a significant association with each other (p 〈 0.0001). Conclusion: Aminotransferases as “surrogate markers” reflect more or less the histological inflammatory activity but do not allow any estimation of the extent of fibrosis. Some patients may have a high inflammatory activity with low aminotransferases or high aminotransferases with low inflammatory activity. Virological parameters such as HCV genotype or viral load do not allow an estimation of histological findings. If prior to treatment of chronic hepatitis C liver biopsy is omitted and the decision for treatment depends solely on the measurement of surrogate markers, considerable misjudgment of the actual status of liver inflammation or fibrosis may result.
    Notes: Zusammenfassung Hintergrund und Ziel: Die Indikation zur Therapie der HCV-RNA-positiven chronischen Hepatitis C ergibt sich nach den derzeitigen deutschen Leitlinien nicht aus der Histologie, sondern durch das Vorliegen erhöhter Transaminasen. Die Indikation zur Gewinnung einer Leberhistologie vor Therapiebeginn wird kontrovers diskutiert. Ziel dieser Studie war die Untersuchung der Korrelation verschiedener biochemischer und virologischer Parameter mit dem histologischen Entzündungs- und Fibrosegrad bei chronischer Hepatitis C. Patienten und Methodik: In einer retrospektiven Untersuchung wurden die Daten von 126 Patienten analysiert, bei denen zwischen Januar 1994 und März 1998 bei chronischer Hepatitis C eine Leberpunktion durchgeführt worden war. Die Histologien wurden einheitlich von einem Pathologen nach einem numerischen Entzündungs- und Fibrosegrad analysiert. Entzündungs- und Fibrosegrade wurden korreliert mit biochemischen und virologischen Parametern. Ergebnisse: Der Entzündungsgrad korrelierte mit der Höhe der GPT (r = 0,33; p 〈 0,001) nicht aber das Fibrosestadiulm (r = 0,15). Weder Entzündungs- noch Fibrosegrad zeigten eine signifikante Korrelation mit dem HCV-Genotype (n = 110) oder der HCV-RNA-Kopienzahl im Serum (n = 57). Entzündungs- und Fibrosegrad waren hochsignifikant miteinander assoziiert (p 〈 0,0001). Schlußfolgerung: Transaminasen spiegeln als “Surrogatmarker” in etwa die histologische Entzündungsaktivität wider, erlauben jedoch keine Rückschlüsse auf das Fibrosestadium. Bei einem Teil der Patienten können jedoch durchaus eine hohe Entzündungsaktivität bei niedrigen Transaminasen oder hohe Transaminasen bei niedriger histologischer Entzündungsaktivität vorliegen. Virologische Parameter wie HCV-Genotyp oder HCV-RNA-Kopienzahl im Serum lassen keine Rückschlüsse auf den Entzündungsgrad oder das Fibrosestadium zu. Der Verzicht auf eine Leberhistologie vor Einleitung der Therapie einer Hepatitis C und die ausschließliche Bestimmung von “Surrogatmarkern” können zu einer deutlichen Fehleinschätzung der tatsächlichen Entzündungs- und Umbauvorgänge in der Leber führen.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Digestive diseases and sciences 38 (1993), S. 1638-1644 
    ISSN: 1573-2568
    Keywords: inflammatory bowel disease ; Crohn's disease ; ulcerative colitis ; PMN-elastase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PMN-elastase is a proteinase released by activated neutrophils. PMN-elastase was determined in two independent populations with inflammatory bowel disease. In an unselected population of 70 consecutive patients with Crohn's disease and 24 patients with ulcerative colitis with different degrees of disease activity plasma PMN-elastase levels were statistically significantly higher in patients with active than in patients with inactive disease [Crohn's disease: 80.5±33.2 ng/ml vs 60.1±24.6 ng/ml (means±sd),P=0.0017; ulcerative colitis: 98.2±54.9 ng/ml vs 59.2±16.8 ng/ml,P=0.026]. PMN-elastase levels in feces were also higher in patients with active Crohn's disease (23.6±15.3 ng/g vs 13.6±12.5 ng/g,P=0.0021) and active ulcerative colitis (46.5±60.5 ng/g vs 20.2±25.0 ng/g,P=0.46), but the difference reached significance only in Crohn's disease. Correlation of disease activity and PMN-elastase in individual patients showed a statistically significant correlation between plasma and fecal elastase concentrations and disease activity in ulcerative colitis (plasma:r=0.72,P〈0.001; feces:r=0.423,P〈0.001) but not fecal elastase concentrations (r=0.0083,P=0.485) correlated significantly with disease activity. Plasma PMN-elastase correlated weakly with fecal PMN-elastase levels in Crohn's disease (r=0.431,P〈0.01) and in ulcerative colitis (r=0.515,P=0.05). In 28 patients with highly active Crohn's disease [median severity activity index (SAI) 203] and 11 patients with highly active ulcerative colitis [median Rachmilewitz index (RI) 14] studied before and four weeks after steroid therapy, treatment lowered the median SAI to 140 and the median RI to 4.5. Mean plasma elastase concentrations decreased concomitantly from 83±44.9 ng/ml to 61.8±25.8 (P=0.0035) in patients with Crohn's disease and from 110±49.5 to 71.6±28.8 ng/ml (P=0.0069) in patients with ulcerative colitis. In conclusion, there is a release of PMN-elastase in active IBD, which can be detected in plasma as well as in feces. Plasma elastase levels reflect disease activity in patients with IBD. The variation of the data and the large overlap between different groups, however, strongly reduce the clinical value.
    Type of Medium: Electronic Resource
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