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'Classic' Anti-Neutrophil Cytoplasmic Autoantibodies (cANCA), 'Wegener's Autoantigen' and Their Immunopathogenic Role in Wegener's Granulomatosis

Identifieur interne : 001689 ( Istex/Corpus ); précédent : 001688; suivant : 001690

'Classic' Anti-Neutrophil Cytoplasmic Autoantibodies (cANCA), 'Wegener's Autoantigen' and Their Immunopathogenic Role in Wegener's Granulomatosis

Auteurs : Wolfgang L. Gross ; Elena Csernok ; Brigitte K. Flesch

Source :

RBID : ISTEX:DD014ECDA9AFA044D59DB02C001A5B7154E116EC

Abstract

Abstract: Wegener's autoantigen (WA), a 29 kD multifunctional protein, is the principal target antigen of autoantibodies associated with Wegener's granulomatosis (WG). WA was first identified as proteinase 3 (PR3), which is now known to be identical with myeloblastin and AGP7. Like other lysosomal proteins, WA/PR3 displays enzymatic activity, differentiation factor activity for myeloid precursor cells, and antimicrobial functions. Neutrophilic polymorphonuclear leukocytes (PMN) and a subpopulation of monocytes contain high levels of WA/PR3 in their myeloperoxidase-positive granules. The autoantibodies from WG sera produce a finely granular, centrally accentuated fluorescence pattern on PMN and monocytes and have been designated 'classic' pattern antineutrophil cytoplasmic autoantibodies (cANCA). However, PMN/monocyte activation (in vitro/ex vivo) is associated with the translocation of WA/PR3 on the cytoplasm membrane. WA/PR3 is accessible to the WG-associated autoantibody: cANCA stimulate cytokine-preactivated PMN to produce oxygen radicals and to degranulate. Furthermore, cANCA interfere with the biological functions of WA/PR3 (e.g. inhibition of elastinolytic activity). Hence, cANCA represents not only the best seromarker for WG so far available, but several lines of evidence indicate that the autoantibodies against WA/PR3 play a major role in the pathogenesis of this enigmatic disease.

Url:
DOI: 10.1006/jaut.1993.1015

Links to Exploration step

ISTEX:DD014ECDA9AFA044D59DB02C001A5B7154E116EC

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<abstract lang="en">Abstract: Wegener's autoantigen (WA), a 29 kD multifunctional protein, is the principal target antigen of autoantibodies associated with Wegener's granulomatosis (WG). WA was first identified as proteinase 3 (PR3), which is now known to be identical with myeloblastin and AGP7. Like other lysosomal proteins, WA/PR3 displays enzymatic activity, differentiation factor activity for myeloid precursor cells, and antimicrobial functions. Neutrophilic polymorphonuclear leukocytes (PMN) and a subpopulation of monocytes contain high levels of WA/PR3 in their myeloperoxidase-positive granules. The autoantibodies from WG sera produce a finely granular, centrally accentuated fluorescence pattern on PMN and monocytes and have been designated 'classic' pattern antineutrophil cytoplasmic autoantibodies (cANCA). However, PMN/monocyte activation (in vitro/ex vivo) is associated with the translocation of WA/PR3 on the cytoplasm membrane. WA/PR3 is accessible to the WG-associated autoantibody: cANCA stimulate cytokine-preactivated PMN to produce oxygen radicals and to degranulate. Furthermore, cANCA interfere with the biological functions of WA/PR3 (e.g. inhibition of elastinolytic activity). Hence, cANCA represents not only the best seromarker for WG so far available, but several lines of evidence indicate that the autoantibodies against WA/PR3 play a major role in the pathogenesis of this enigmatic disease.</abstract>
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<dateIssued encoding="w3cdtf">1993</dateIssued>
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<identifier type="ISSN">0896-8411</identifier>
<identifier type="PII">S0896-8411(00)X0051-0</identifier>
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<date>1993</date>
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<start>131</start>
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<identifier type="DOI">10.1006/jaut.1993.1015</identifier>
<identifier type="PII">S0896-8411(83)71015-2</identifier>
<accessCondition type="use and reproduction" contentType="copyright">©1993 Academic Press</accessCondition>
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