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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Autoantibodies against glucuronosyltransferases differ between viral hepatitis and autoimmune hepatitis.

BACKGROUND & AIMS: Approximately 13% of patients with chronic hepatitis D virus (HDV) infection have liver-kidney microsomal antibodies type 3 (LKM-3) directed against family 1 uridine 5'-diphosphate-glucuronosyl-transferases ( UGT-1). The aim of this study was to characterize the prevalence and specificity of LKM-3 by recombinant antigen testing systems. METHODS: Enzyme-linked immunosorbent assay (ELISA) and Western blot were performed using baculovirus-generated human UGT-1.1 and -1.6 and rabbit UGT-1. 6. Sera from patients with HDV (n = 50), autoimmune hepatitis (AIH) type 2 (n = 50), hepatitis B virus (n = 26), hepatitis C virus (HCV) (n = 25), and LKM-1 autoantibody-positive HCV (n = 14) and sera from normal controls (n = 50) and italian patients with HDV and known LKM-3 autoantibodies were studied. RESULTS: Six percent of patients with HDV from Germany and 8% of patients with type 2 AIH had LKM-3. Sera from italian patients with HDV and patients with AIH type 2 recognized all three recombinant UGT-1. HDV sera from Germany selectively recognized human UGT-1. LKM-3 titers were lower in HDV than in AIH. One patient with AIH had LKM-3 as the only marker of AIH. CONCLUSIONS: This study indicates a molecular target and titer difference of LKM-3 autoantibodies in German subjects with HDV and AIH. It also suggests a geographic target and titer difference of LKM-3 in HDV. LKM-3 are identified as a rare and previously undescribed independent marker of AIH.[1]

References

  1. Autoantibodies against glucuronosyltransferases differ between viral hepatitis and autoimmune hepatitis. Strassburg, C.P., Obermayer-Straub, P., Alex, B., Durazzo, M., Rizzetto, M., Tukey, R.H., Manns, M.P. Gastroenterology (1996) [Pubmed]
 
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