Volume 41, Issue 12 pp. 1122-1131
Original Article

A large candidate-gene association study suggests genetic variants at IRF5 and PRDM1 to be associated with aggressive periodontitis

Arne S. Schaefer

Corresponding Author

Arne S. Schaefer

Institute for Clinical Molecular Biology, Christian-Albrechts-University, Kiel, Germany

Address:

Arne S. Schaefer

Institute of Clinical Molecular Biology

Christian-Albrechts-University

Arnold-Heller-Str. 3, 24105 Kiel, Germany

E-mail: [email protected]

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Arne Jochens

Arne Jochens

Institute of Medical Informatics and Statistics, Christian-Albrechts-University, Kiel, Germany

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Henrik Dommisch

Henrik Dommisch

Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany

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Christian Graetz

Christian Graetz

Department of Operative Dentistry and Periodontology, University Medical Center Schleswig-Holstein, Kiel, Germany

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Yvonne Jockel-Schneider

Yvonne Jockel-Schneider

Department of Periodontology, Clinic of Preventive Dentistry and Periodontology, University Medical Center of the Julius-Maximilians-University, Würzburg, Germany

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Inga Harks

Inga Harks

Center of Periodontology, Operative and Preventive Dentistry, University Medical Center, Münster, Germany

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Ingmar Staufenbiel

Ingmar Staufenbiel

Department of Conservative Dentistry, Periodontology and Preventive Dentistry, Hannover Medical School, Hannover, Germany

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Joerg Meyle

Joerg Meyle

Department of Periodontology, University Medical Center, Giessen, Marburg, Germany

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Peter Eickholz

Peter Eickholz

Department of Periodontology, Centre for Dental, Oral, and Maxillofacial Medicine (Carolinum), Johann Wolfgang Goethe-University, Frankfurt am Main, Germany

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Mathias Folwaczny

Mathias Folwaczny

Department of Preventive Dentistry and Periodontology, University of Munich, Munich, Germany

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Marja Laine

Marja Laine

Department of Periodontology and Oral Biochemistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam, VU University Amsterdam, Amsterdam, The Netherlands

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Barbara Noack

Barbara Noack

Center of Periodontology, Operative and Preventive Dentistry, Clinic of Preventive Dentistry, University Medical Center Carl Gustav Carus der Technischen Universität Dresden, Dresden, Germany

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Cisca Wijmenga

Cisca Wijmenga

Department of Genetics, University Medical Center, Groningen, The Netherlands

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Wolfgang Lieb

Wolfgang Lieb

Biobank Popgen, University Medical Center Schleswig-Holstein, Kiel, Germany

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Corinna Bruckmann

Corinna Bruckmann

Department of Conservative Dentistry and Periodontology, Clinic of Dentistry, Bernhard Gottlieb University, Vienna, Austria

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Stefan Schreiber

Stefan Schreiber

Institute for Clinical Molecular Biology, Christian-Albrechts-University, Kiel, Germany

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Søren Jepsen

Søren Jepsen

Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany

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Bruno G. Loos

Bruno G. Loos

Department of Periodontology and Oral Biochemistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam, VU University Amsterdam, Amsterdam, The Netherlands

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First published: 26 September 2014
Citations: 26

Conflict of interest and source of funding

The authors declare that they have no conflicts of interest. The Department of Periodontology at ACTA is funded in part by a grant from the University of Amsterdam for the focal point “Oral infection and inflammation.” Author AS is funded by a grant of the Deutsche Forschungsgemeinschaft (KFO208); author BL received a supportive contribution from the Dutch Society of Periodontology for research into the genetics of periodontitis. The popgen 2.0 network is supported by a grant from the German Ministry for Education and Research (01EY1103).

Abstract

Aim

Epidemiological and clinical studies indicated a relationship of periodontitis with rheumatoid arthritis (RA). We aimed to identify shared genetic susceptibility loci of RA and periodontitis.

Materials and Methods

Forty-seven risk genes of genome-wide significance of RA and SLE were genotyped in a German case–control sample of aggressive periodontitis (AgP), using Immunochip genotyping arrays (Illumina, 600 cases, 1440 controls) and Affymetrix 500 K Genotyping Arrays (280 cases and 983 controls). Significant associations were replicated in 168 Dutch AgP cases and 679 controls and adjusted for the confounders smoking and sex.

Results

Variants at IRF5 and PRDM1 showed association with AgP. Upon covariate adjustment for smoking and sex, the most strongly associated variant at IRF5 was the rare variant rs62481981 (ppooled = 0.0012, odds ratio [OR] = 3.1, 95% confidence interval [95% CI] = 1.6–6.1; 801 cases, 1476 controls).Within PRDM1 it was rs6923419 (ppooled = 0.004, OR = 0.7, 95% CI = 0.6–0.9; 833 cases, 1440 controls). The associations lost significance after correction for multiple testing in the replication. Both genes are implicated in beta-interferon signalling and are also genome-wide associated with SLE and inflammatory bowel disease.

Conclusion

The study gives no definite evidence for a pathogenic genetic link of periodontitis and RA but suggests IRF5 and PRDM1 as shared susceptibility factors.

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