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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | James, O. F. Guest, J. R. Bassendine, M. F. Fussey, S. P. Yeaman, S. J. |
| Description | Author Affiliation: Fussey SP ( Department of Biochemistry, Medical School, University of Newcastle upon Tyne, United Kingdom.); |
| Abstract | Primary biliary cirrhosis (PBC) is a chronic cholestatic liver disease characterized by the presence of antimitochondrial antibodies in the serum. It is possible that the PBC-specific immunoreactive trypsin-sensitive antigens on the inner mitochondrial membrane, termed M2, are important in the pathogenesis of this autoimmune disease. We have previously shown that a major M2'a' antigen is the E2 component of the pyruvate dehydrogenase multienzyme complex located within mitochondria. Analysis of the primary structure of the E2 components of all three 2-oxo acid dehydrogenase complexes reveals a high degree of homology with a similar highly segmented structure including lipoyl domains, E3-binding domains, C-terminal catalytic domains, and interdomain linker sequences. Immunoblotting of PBC patients' sera against purified E2 protein from 2-oxoglutarate dehydrogenase complex and branched-chain 2-oxo acid dehydrogenase complex reveals that these polypeptides are also autoantigens in this disease. Sera from 29 of 40 (72.5%) PBC patients gave a positive response against bovine 2-oxoglutarate dehydrogenase complex E2 and from 25 of 40 (62.5%) PBC patients gave a positive response against bovine branched-chain 2-oxo acid dehydrogenase complex E2. All 40 PBC patients (100%) have autoantibodies directed against at least one of the E2 components of the family of 2-oxo acid dehydrogenase complexes. Identification of these M2 mitochondrial autoantigens and detailed knowledge of their structure will allow important questions concerning this autoimmune disease to be addressed. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 22 |
| Volume Number | 85 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1988-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Acetyltransferases Immunology Autoantigens Intracellular Membranes Liver Cirrhosis, Biliary Mitochondria, Liver Pyruvate Dehydrogenase Complex Amino Acid Sequence Animals Dihydrolipoyllysine-Residue Acetyltransferase Immunoblotting Enzymology Molecular Sequence Data Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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