Volume 48, Issue 9 pp. 1152-1164
ORIGINAL ARTICLE CLINICAL PERIODONTOLOGY

Differential DNA methylation and mRNA transcription in gingival tissues in periodontal health and disease

Hyunjin Kim

Hyunjin Kim

Biomedical Informatics Shared Resource, Herbert Irving Comprehensive Cancer Center and Department of Systems Biology, Columbia University, New York, New York, USA

Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA

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Fatemeh Momen-Heravi

Fatemeh Momen-Heravi

Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences, College of Dental Medicine, Columbia University, New York, New York, USA

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Steven Chen

Steven Chen

Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences, College of Dental Medicine, Columbia University, New York, New York, USA

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Per Hoffmann

Per Hoffmann

Institute of Human Genetics, University of Bonn, Bonn, Germany

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Moritz Kebschull

Moritz Kebschull

Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences, College of Dental Medicine, Columbia University, New York, New York, USA

School of Dentistry, Institute of Clinical Sciences, University of Birmingham, Birmingham, UK

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Panos N. Papapanou

Corresponding Author

Panos N. Papapanou

Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences, College of Dental Medicine, Columbia University, New York, New York, USA

Correspondence

Panos N. Papapanou, Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences, Columbia University College of Dental Medicine, 630 W 168th Street, PH 7 E 10, New York, NY 10032.

Email: [email protected]

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First published: 07 June 2021
Citations: 21

Funding information: NIH/NIDCR:, Grant/Award Numbers: DE015649, DE021820, DE024735, NCATS: TR000040, Colgate Palmolive Company

Abstract

Aim

We investigated differential DNA methylation in gingival tissues in periodontal health, gingivitis, and periodontitis, and its association with differential mRNA expression.

Materials and methods

Gingival tissues were harvested from individuals and sites with clinically healthy and intact periodontium, gingivitis, and periodontitis. Samples were processed for differential DNA methylation and mRNA expression using the IlluminaEPIC (850 K) and the IlluminaHiSeq2000 platforms, respectively. Across the three phenotypes, we identified differentially methylated CpG sites and regions, differentially expressed genes (DEGs), and genes with concomitant differential methylation at their promoters and expression were identified. The findings were validated using our earlier databases using HG-U133Plus2.0Affymetrix microarrays and Illumina (450 K) methylation arrays.

Results

We observed 43,631 differentially methylated positions (DMPs) between periodontitis and health, and 536 DMPs between gingivitis and health (FDR < 0.05). On the mRNA level, statistically significant DEGs were observed only between periodontitis and health (n = 126). Twelve DEGs between periodontitis and health (DCC, KCNA3, KCNA2, RIMS2, HOXB7, PNOC, IRX1, JSRP1, TBX1, OPCML, CECR1, SCN4B) were also differentially methylated between the two phenotypes. Spearman correlations between methylation and expression in the EPIC/mRNAseq dataset were largely replicated in the 450 K/Affymetrix datasets.

Conclusions

Concomitant study of DNA methylation and gene expression patterns may identify genes whose expression is epigenetically regulated in periodontitis.

CONFLICT OF INTEREST

The authors declare no conflict of interests.

DATA AVAILABILITY STATEMENT

The Affymetrix HG-U133Plus 2.0 microarray dataset is available at the Gene Expression Omnibus (GSE #16134). The EPIC- and 450K- DNA methylation data, as well as the RNA seq data are available at the Gene Expression Omnibus (GSE #173082).

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