PMID- 11122260 OWN - NLM STAT- MEDLINE DCOM- 20010111 LR - 20190513 IS - 0009-9104 (Print) IS - 1365-2249 (Electronic) IS - 0009-9104 (Linking) VI - 122 IP - 3 DP - 2000 Dec TI - Autoantibodies to early endosome antigen (EEA1) produce a staining pattern resembling cytoplasmic anti-neutrophil cytoplasmic antibodies (C-ANCA). PG - 493-8 AB - Autoantibodies to EEA1 have been described in patients with neurological diseases, subacute cutaneous lupus and a variety of other conditions, including a patient with Wegener's granulomatosis (WG). EEA1 is a hydrophilic peripheral membrane protein transiently associated with the cytoplasmic face of early endosomes. Antibodies to EEA1 produce a staining pattern that resembles the C-ANCA pattern produced by anti-proteinase 3 (PR3) antibodies in WG sera. Co-localization studies show incomplete overlap of the staining produced by anti-EEA1 with anti-PR3. We showed that 0/40 unselected sera, from a cohort of WG patients and antibodies to PR3, reacted with EEA1. In addition, 1/15 sera that have a C-ANCA staining pattern but do not react with PR3 in an ELISA, immunoprecipitated the recombinant EEA1 protein. We conclude that although antibodies to EEA1 produce a staining pattern that resembles anti-PR3 and C-ANCA, antibodies to EEA1 in WG are rare. However, some C-ANCA+ sera that do not react with PR3 may contain EEA1 autoantibodies. FAU - Selak, S AU - Selak S AD - Faculty of Medicine, University of Calgary, Calgary, Canada. FAU - Woodman, R C AU - Woodman RC FAU - Fritzler, M J AU - Fritzler MJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Clin Exp Immunol JT - Clinical and experimental immunology JID - 0057202 RN - 0 (Antibodies, Antineutrophil Cytoplasmic) RN - 0 (Autoantibodies) RN - 0 (Autoantigens) RN - 0 (Membrane Proteins) RN - 0 (Vesicular Transport Proteins) RN - 0 (early endosome antigen 1) RN - 368GB5141J (Sodium Dodecyl Sulfate) RN - EC 3.4.21.- (Serine Endopeptidases) RN - EC 3.4.21.76 (Myeloblastin) SB - IM MH - Animals MH - Antibodies, Antineutrophil Cytoplasmic/*immunology MH - Autoantibodies/blood/*immunology MH - Autoantigens/*immunology MH - Electrophoresis, Polyacrylamide Gel/methods MH - Fluorescent Antibody Technique, Indirect MH - Granulomatosis with Polyangiitis/blood/*immunology MH - Humans MH - Immunoblotting/methods MH - Membrane Proteins/*immunology MH - Myeloblastin MH - Neutrophils/immunology MH - Precipitin Tests/methods MH - Rabbits MH - Serine Endopeptidases/immunology MH - Sodium Dodecyl Sulfate MH - Staining and Labeling MH - Tumor Cells, Cultured MH - Vesicular Transport Proteins PMC - PMC1905789 EDAT- 2000/12/21 11:00 MHDA- 2001/02/28 10:01 PMCR- 2001/12/01 CRDT- 2000/12/21 11:00 PHST- 2000/12/21 11:00 [pubmed] PHST- 2001/02/28 10:01 [medline] PHST- 2000/12/21 11:00 [entrez] PHST- 2001/12/01 00:00 [pmc-release] AID - cei1390 [pii] AID - 10.1046/j.1365-2249.2000.01390.x [doi] PST - ppublish SO - Clin Exp Immunol. 2000 Dec;122(3):493-8. doi: 10.1046/j.1365-2249.2000.01390.x.