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DOI: 10.1055/s-2001-17603
Einfluss von Cyclosporin A auf die Nierenfunktion in der Therapie der Glomerulonephritis
Effect of cyclosporin A on renal function in patients with glomerulonephritisPublikationsverlauf
Publikationsdatum:
04. Oktober 2001 (online)

Hintergrund und Fragestellung: Cyclosporin A (CsA) ist ein wesentlicher Bestandteil in der Therapie des nephrotischen Syndroms. Wir untersuchten das Verhalten von renaler Hämodynamik und glomerulärer Permselektivität unter und nach Absetzen von CsA, um zwischen hämodynamischen und immunsuppressiven Einflüssen auf die antiproteinurische Wirkung von CsA zu unterscheiden.
Patienten und Methodik: Untersucht wurden 19 Patienten (12 Frauen, sieben Männer) nach mindestens 6-monatiger Behandlung mit CsA. Die Patienten, von denen zehn an einer membranösen (MGN), fünf an einer fokal-segmental sklerosierenden (FSGN) und vier an einer Minimal-changes(MCGN)-Glomerulonephritis litten, wurden im Rahmen eines A-B-A¿-Designs dreimal untersucht (A/A¿: CsA/ Steroide, B: Steroide höher dosiert). Gemessen wurden Blutdruck, Kreatinin, Proteinurie, Inulin- und PAH-Clearance sowie die fraktionelle Dextranclearance (FCDex)in Anlehnung an das Modell von Deen et al.
Ergebnisse: Unter Auslass der CsA-Medikation (Phase B) nahm die CIn von 54 ± 7,3 auf 64 ± 8,5 ml/min signifikant zu (p < 0,01). In der CsA-freien Phase nahm die Proteinurie in Abhängigkeit von der Morphologie der Glomerulonephritis zwischen 21 % (MGN) und 45 % (FSGN) zu. Unter Fortfall der CsA-Medikation blieb die FCDex bei Patienten mit MGN und FSGN weitgehend unverändert, während bei Patienten mit MCGN eine Verminderung der Permselektivität im hochmolekularen Bereich nachgewiesen werden konnten (p < 0,05).
Folgerung: Die vorliegenden Untersuchungen zeigen, dass CsA in der Lage ist, auch kurzfristig eine signifikante Veränderung der glomerulären Permselektivität bei Patienten mit MCGN zu erreichen. Bei Patienten mit MGN und FSGN standen die akuten Veränderungen der Hämodynamik im Vordergrund.
Effect of cyclosporin A on renal function in patients with glomerulonephritis
Background and objective: Cyclosporin A ( CsA) plays a confounding part in the treatment of nephrotic syndrome. Renal hemodynamics and glomerular permselectivity were investigated in patients with glomerulonephritis to analyse the antiproteinuric action of CsA and to differentiate between nephrotoxic and immunosuppressive effects.
Methods: We studied 19 patients with nephrotic syndrome after 6 months of treatment with CsA (membranous glomerulonephritis-MGN, n = 10; focal segmental sclerosing glomerulonephritis - FSGN, n = 5; minimal changes glomerulonephritis - MCGN, n = 4). Patients were studied three times within 3 weeks with (A) and without (B) CsA treatment (A-B-A’). Blood pressure, creatinine, proteinuria, CIn, CPAH, CDex were measured (analysis according to the model of Deen et al., Am J Physiol. 1985; 249 : 374).
Results: GFR (C In) increased significantly after withdrawal of CsA from 54 ± 7.3 to 64 ± 8.5 ml/min (p < 0.01). Proteinuria increased after withdrawal of cyclosporin (B) between 21 % (MGN) and 45 % (FSGN). After withdrawal of CsA (B) there was no change of FCdex in patients with MGN and FSGN. Withdrawal of CsA in patients with MCGN induced a significant decrease in glomerular selectivity in the high molecular range.
Conclusion: These data demonstrate that CsA is able to induce even in the short term a significant increase in glomerular permselectivity in MCGN. The acute effects on GFR predominantly determined the acute antiproteinuric effects in patients with MGN and FSGN .
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Korrespondenz
Prof. Dr. Peter J. Heering
Klinik für Nephrologie und Rheumatologie, Heinrich
Heine Universität
Moorenstraße 5
40225 Düsseldorf
Telefon: 0211/811 7773
Fax: 0211/811 8886
eMail: heering@klinikumsolingen.de