Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0023890 (cirrhosis)
 42,195 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The methods to detect antimitochondrial antibodies (AMAs), which are characteristically positive in primary biliary cirrhosis (PBC), have some problems in technical difficulty, sensitivity and specificity. Based on the finding that one of the major antigens corresponding to AMAs was the E2 component of pyruvate dehydrogenase complex (PDH), a very simple enzyme-linked immunosorbent assay (ELISA) to detect anti-PDH antibody (anti-PDH) has been developed in this study. Among 68 patients with PBC, IgG class anti-PDH and IgM class anti-PDH were detected in 64 patients (94.1%) and in 55 patients (80.8%), respectively, while only three cases (4.4%) were both negative. Mean optical densities (O.D.) of sera from patients with PBC were 0.536 +/- 0.386 (mean +/- SD) in IgG class and 0.308 +/- 0.342 in IgM class. No positive cases were detected in the following patients by this ELISA: 20 patients with acute viral hepatitis, 24 with chronic persistent hepatitis, 32 with chronic active hepatitis, 19 with liver cirrhosis, 19 with hepatocellular carcinoma, 19 with acute intrahepatic cholestasis, 10 with autoimmune hepatitis, and six with systemic lupus erythematosus. Among nine AMAs negative cases with PBC by conventional indirect immunofluorescence (IF) assay, seven cases were found to be positive by this ELISA. The inter-assay coefficient of the variation of this method ranged from 4.9% to 5.8% and the intra-assay coefficient of variation from 3.8% to 5.1%. Therefore, this ELISA is useful for diagnosis of PBC.
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PMID:Detection of anti-pyruvate dehydrogenase complex antibody in primary biliary cirrhosis by an enzyme-linked immunosorbent assay. 221 Feb 21

Hepatitis C virus (HCV) infection has been found to be strikingly associated with autoimmune phenomena. The aim of the present study was to investigate the presence of various autoantibodies in patients with HCV infection. Anti-neutrophil cytoplamic antibody (ANCA), anti-dihydrolipoamide dehydrogenase (anti-E3), rheumatoid factor (RF), anti-dihydrolipoamide acetyltransferase (anti-E2), anti-SS-A/Ro (60 kD), anti-SS-A/Ro (52 kD), anti-SS-B/La, anti-topoisomerase II (anti-topo II), anti-cardiolipin (aCL), anti-dsDNA, anti-ssDNA, anti-nuclear antibodies (ANA), anti-proteinase 3 (anti-Pr3) and anti-myeloperoxidase (anti-MPO) were determined in sera from 516 patients with HCV infection, 11 with primary biliary cirrhosis (PBC) and 44 healthy controls. Assays employed were indirect immunofluoresence, the particle latex agglutination test, enzyme-linked immunosorbent assay (ELISA) and immunoblotting. ANCA, anti-E3 antibody and RF were positive in 278/516 (55.6%), 276/516 (53.3%) and 288/516 (56%) patients with HCV infection, respectively. Positivity for ANA was present in 15.8%, anti-ssDNA in 15.6%, anti-dsDNA in 8.5%, aCL in 5%, anti-SS-B/La in 4.1%, anti-SS-A/Ro (60 kD) in 3.9%, anti-E2 in 3.3% and anti-SSA/Ro (52 kD) in 1.2%, anti-MPO in 4.8%, anti-Topo II and anti-actinin in 0%. All sera with ANCA showed c-ANCA patterns and contained anti-PR3 specificity. HCV patients with ANCA showed a higher prevalence of skin involvement, anaemia, abnormal liver function and alpha-Fetoprotein (alpha-FP). HCV patients with anti-E3 antibodies showed a higher prevalence of liver cirrhosis, arthritis, abnormal liver function and elevated alpha-FP levels. The prevalence of autoantibodies was not affected by treatment with interferon-alpha (IFN-alpha). In conclusion, autoantibodies are commonly found in patients with HCV infection. There is a high prevalence of anti-E3, ANCA and RF in these patients. Proteinase 3 and E3 are the major target antigens in HCV infection. HCV may be regarded as a possible causative factor in ANCA-related vasculitis.
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PMID:Proteinase 3 and dihydrolipoamide dehydrogenase (E3) are major autoantigens in hepatitis C virus (HCV) infection. 1198 26