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Autoantibodies to lactoferrin and histone in systemic vasculitis identified by anti-myeloperoxidase solid phase assays.
- Source :
-
Kidney international [Kidney Int] 1994 Jul; Vol. 46 (1), pp. 153-60. - Publication Year :
- 1994
-
Abstract
- We aimed at confirming the antigen specificity recognized by anti-neutrophil cytoplasm antibodies (ANCA) in patients presenting systemic vasculitis with anti-myeloperoxidase (MPO) activity on ELISA. Thirty-five consecutive patients with reactivity in anti-MPO ELISA and systemic microscopic vasculitides were tested in slot and Western blot analyses. Eleven of 35 sera exhibited binding in Western blot studies with the MPO preparation used in the ELISA: five sera bound at the size of MPO, but five sera reacted with a 78 kD species (p78) co-purifying with MPO, and one serum blotted both MPO and p78. Sequence analysis and antigen-specific assays including Western blot studies showed that p78 is lactoferrin. All anti-lactoferrin positive sera, but no anti-MPO positive sera, also exhibited anti-nuclear binding on HEp2 cells with specificity for histone. We concluded that: (a) a subgroup of patients presenting systemic vasculitis with false anti-MPO reactivity on ELISA had anti-lactoferrin antibodies; (b) anti-lactoferrin was associated with anti-nuclear activity with specificity for histone; (c) these patients had systemic vasculitis without histological evidence of immune complex deposition.
- Subjects :
- Amino Acid Sequence
Antibodies, Antineutrophil Cytoplasmic
Antibodies, Antinuclear immunology
Autoantibodies immunology
Biomarkers
Blotting, Western
Cell Line
Electrophoresis, Polyacrylamide Gel
Enzyme-Linked Immunosorbent Assay
Fluorescent Antibody Technique
Humans
Lactoferrin chemistry
Molecular Sequence Data
Peroxidase
Autoantibodies analysis
Histones immunology
Lactoferrin immunology
Vasculitis immunology
Subjects
Details
- Language :
- English
- ISSN :
- 0085-2538
- Volume :
- 46
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Kidney international
- Publication Type :
- Academic Journal
- Accession number :
- 7933832
- Full Text :
- https://doi.org/10.1038/ki.1994.254