- 作者：Michael Mahler ; Dimitrios P. Bogdanos ; Polychronis Pavlidis ; Marvin J. Fritzler ; Elena Csernok ; Jan Damoiseaux ; Chelsea Bentow ; Zakera Shums ; Alastair Forbes ; Gary L. Norman
- 关键词：ASCA ; anti-Saccharomyces cerevisiae antibody ; cANCA ; cytoplasmic anti-neutrophil cytoplasmic antibodies ; CIA ; chemiluminescence assay ; CrD ; Crohn's disease ; CU ; calculated units ; GPA ; granulomatosis with polyangiitis ; IBD ; inflammatory bowel disease ; IIF
- 刊名：Clinica Chimica Acta
- 出版年：2013
- 出版时间：23 September, 2013
- 年：2013
- 卷：424
- 期：Complete
- 页码：267-273
- 全文大小：766 K
Background
We determined if PR3-ANCA is a biomarker that differentiates ulcerative colitis (UC) from Crohn's disease (CrD).Methods
A total of 946 sera were tested, including 86 granulomatosis with polyangiitis (GPA) and 491 inflammatory bowel disease (IBD) patients (283 UC and 208 CrD), 264 pathological controls (various diseases) and 105 healthy individuals. All samples were tested for PR3-ANCA by ELISA (QUANTA Flash Lite?, INOVA Diagnostics) and chemiluminescent immunoassays (CIA QUANTA Flash PR3). Conventional anti-neutrophil cytoplasmic antibody (ANCA) indirect immunofluorescence assays (IIF) was performed with NOVA Lite? (INOVA Diagnostics).
Results
PR3-ANCA by CIA were detected in 31.1 % UC vs. 1.9 % CrD sera (p = 2.2E ? 16), and by ELISA in 6 % UC and 0 % CrD (p = 0.0003). In GPA patients, PR3-ANCA were detected in 75.6 % by CIA and 61.6 % by ELISA (p < 0.05). PR3-ANCA by CIA were more prevalent in E3-UC compared to E1/2-UC (p < 0.05), and in patients with shorter disease duration (p < 0.0001). PR3-ANCA showed similar sensitivity, but significantly higher specificity (p < 0.05), compared to atypical pANCA by IIF.
Conclusion
The novel PR3 CIA may prove helpful in the differentiation of CrD from UC, as well as in the identification of UC patients with more extensive disease.