Abstract | BACKGROUND: METHODS: We expressed a soluble recombinant form of the collagen XVII ectodomain in mammalian cells. Reactivity of IgA autoantibodies from patients with IgA pemphigoid was assessed by immunofluorescence microscopy and immunoblot analysis. ELISA test conditions were determined by chessboard titration experiments. The sensitivity, specificity and the cut-off were determined by receiver-operating characteristics analysis. RESULTS: CONCLUSIONS: We developed the first ELISA for the specific and sensitive detection of serum IgA autoantibodies specific to collagen XVII in patients with pemphigoids. This immunoassay should prove a useful tool for clinical and translational research and should essentially improve the diagnosis and disease monitoring of patients with IgA pemphigoid. Moreover, our findings strongly suggest that IgA pemphigoid and IgG bullous pemphigoid represent two ends of the clinical spectrum of an immunological loss of tolerance against components of hemidesmosomes, which is mediated by both IgG and IgA autoantibodies.
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Authors | Kinga Csorba, Sabine Schmidt, Florina Florea, Norito Ishii, Takashi Hashimoto, Michael Hertl, Sarolta Kárpáti, Leena Bruckner-Tuderman, Wataru Nishie, Cassian Sitaru |
Journal | Orphanet journal of rare diseases
(Orphanet J Rare Dis)
Vol. 6
Pg. 31
(May 28 2011)
ISSN: 1750-1172 [Electronic] England |
PMID | 21619684
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | © 2011 Csorba et al; licensee BioMed Central Ltd. |
Chemical References |
- Autoantibodies
- Autoantigens
- Immunoglobulin A
- Non-Fibrillar Collagens
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Topics |
- Autoantibodies
(blood)
- Autoantigens
(blood, immunology, metabolism)
- Cell Line
- Enzyme-Linked Immunosorbent Assay
(methods, standards)
- Humans
- Immunoglobulin A
(blood)
- Non-Fibrillar Collagens
(blood, immunology, metabolism)
- Pemphigoid, Bullous
(blood, diagnosis, immunology)
- Sensitivity and Specificity
- Collagen Type XVII
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