Mannose-binding lectin level and deficiency is not associated with inflammatory bowel diseases, disease phenotype, serology profile, and NOD2/CARD15 genotype in a large Hungarian cohort

Papp, Mária and Lakatos, Péter László and Hársfalvi, Jolán and Farkas, G. and Palatka, Károly and Udvardy, Miklós and Molnár, Tamás and Farkas, Klaudia and Nagy, Ferenc and Veres, Gábor and Lakatos, László and Kocsis, Ágnes Katalin and Papp, János Mihály and Altorjay, István (2010) Mannose-binding lectin level and deficiency is not associated with inflammatory bowel diseases, disease phenotype, serology profile, and NOD2/CARD15 genotype in a large Hungarian cohort. HUMAN IMMUNOLOGY, 71 (4). pp. 407-413. ISSN 0198-8859

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Abstract

Mannose-binding lectin (MBL) is a major, soluble, pattern-recognition molecule and an important component of the innate host defense. The role of MBL in inflammatory bowel diseases (IBDs) is controversial. We determined the prevalence of MBL deficiency in a Hungarian IBD patients' cohort, and whether it is associated with the antimicrobial antibody formation or particular clinical manifestations. Nine hundred ninety IBD patients and 225 healthy subjects were investigated. Sera were assayed for MBL and a panel of antimicrobial antibodies (anti-OMP, anti-Saccharomyces cerevisiae antibodies, and antiglycans) by ELISA. TLR4 and NOD2/CARD15 variants were tested by polymerase chain reaction/restriction fragment length polymorphism. Median MBL level was not significantly different between IBDs (Crohn's disease [CD]: 929; ulcerative colitis [UC]: 810 ng/ml) and the control group (1027 ng/ml), as well as the prevalence of absolute MBL deficiency (<100 ng/ml) (CD: 15.0%, UC: 18.4%, controls: 15.6%). The presence of a low MBL level (<500 ng/ml) was not associated with any of the examined serologic markers, or their combinations. In addition, there was no association with the clinical presentation, disease course, or response to treatment. TLR4 variant genotype was more common in CD patients without MBL deficiency (11% vs. 1.7%, OR: 7.29, 95% CI: 1.08-53.9, p = 0.02). We failed to confirm any association between MBL deficiency and serologic marker positivity. MBL deficiency was not predictive for clinical phenotype or disease activity in IBDs.

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