Dirk Roggenbuck, Dirk Reinhold, Thomas Wex, Alexander Goihl, Ulrike von Arnim, Peter Malfertheiner, Thomas Büttner, Tomas Porstmann, Silvia Porstmann, Bodo Liedvogel, Dimitrios P Bogdanos, Martin W Laass, Karsten Conrad
GA Generic Assays GmbH, 15827 Dahlewitz, Ludwig-Erhard Ring 3, Germany. dirk.roggenbuck@genericassays.com
Clinica chimica acta; international journal of clinical chemistry 2011 Apr 11Crohn's disease (CD) is an inflammatory bowel disease (IBD) characterized by reactivity against microbial and self antigens. Zymogen granule glycoprotein 2 (GP2) was identified as the major autoantigen of CD-specific pancreatic autoantibodies (PAB). Human GP2 was expressed in the Spodoptera frugiperda 9 (Sf9) cell line using the baculovirus system, purified by Ni-chelate chromatography, and used as antigen for anti-GP2 IgA and IgG assessment by enzyme-linked immunosorbent assays (ELISA). Antibodies to mannan of Saccharomyces cerevisiae (ASCA), PAB, and anti-GP2 were investigated in sera of 178 CD patients, 100 ulcerative colitis (UC) patients, and 162 blood donors (BD). Anti-GP2 IgG and IgA were found in 48/72 (66.7%) and 23/72 (31.9%) PAB positive and 5/106 (4.7%) and 1/106 (0.9%) PAB negative CD patients (p<0.0001), respectively. CD patients displayed significantly higher reactivity to GP2 than UC patients and BD (p<0.0001), respectively. Occurrence of anti-GP2 antibodies correlated with PAB reactivity (Spearmen's rho=0.493, p<0.00001). There was a significant relationship between the occurrence of ASCA IgG and anti-GP2 IgG (p=0.0307). Anti-GP2 IgG and IgA constitute novel CD specific autoantibodies, the quantification of which could improve the serological diagnosis of IBD. Copyright © 2010 Elsevier B.V. All rights reserved.
Dirk Roggenbuck, Dirk Reinhold, Thomas Wex, Alexander Goihl, Ulrike von Arnim, Peter Malfertheiner, Thomas Büttner, Tomas Porstmann, Silvia Porstmann, Bodo Liedvogel, Dimitrios P Bogdanos, Martin W Laass, Karsten Conrad. Autoantibodies to GP2, the major zymogen granule membrane glycoprotein, are new markers in Crohn's disease. Clinica chimica acta; international journal of clinical chemistry. 2011 Apr 11;412(9-10):718-24
PMID: 21195704
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