This application represents an exciting GWAS (Genome-Wide Association Study) to identify genes associated with edentulism, gingivitis and periodontitis. We intend to perform a GWAS meta-analysis using two primary databases;one with 6,786 subjects [from the Dental- Atherosclerosis Risk in Communities (DARIC) Study] and another with 4,308 subjects [from the Study of Health in Pomerania (SHIP) Study]. Both datasets have whole genomic genotyping data recently created using the Affymetrix Human SNP Array 6.0 and have detailed clinical periodontal examination data, and complete medical and risk factor data. We intend to use a meta-analysis approach combining these two datasets to identify genes that confer risk for edentulism, gingivitis and periodontitis. A third dataset of 3075 subjects [Health and Body Composition (HealthABC) Study] with periodontal phenotypes and genotype data created using the Illumina 1m SNP chip platform will be used for replication of these findings. This represents a collaboration that brings together the dental researchers at the UNC School of Dentistry using the Dental ARIC data, and the genetic epidemiologists at the UNC School of Public Health (DARIC) and two other groups - U of Greifswald Germany (SHIP) and UCLA/U of Pittsburgh (HealthABC). Together, we propose to perform what to our knowledge will be the first genome-wide survey for genes which are associated with periodontal disease in a representative adult population. We are fortunate to work with an outstanding genetic epidemiologist, Dr Kari North who will lead the genetic survey and statistical analyses. We have an approved ARIC protocol to analyze these data for gene associations for periodontal disease and have a commitment for the sharing of the SHIP and HealthABC datasets for the met-analysis and replication. We intend to conduct a GWAS applying various clinical case definitions of periodontal disease using existing data from both D-ARIC (n=6786) and SHIP (n=4,308). We propose to develop race-specific models for gene-wide associations using various definitions of oral disease - either categorical classifications of disease using clinically relevant clusters of clinical signs to define case status or by defining clinical phenotypes using clinical signs independently as continuous variables, such as mean interproximal attachment loss. We propose to analyze the two datasets independently and then conduct a meta-analysis pooling them, using harmonized variable definitions for the phenotypes. We also intend to examine for gene-environment interactions focusing on smoking, obesity, diabetes and microbial burden as effect modifiers. Finally, we will perform a replication analysis using the HealthABC dataset. Our goal is to identifying novel genes that confer either susceptibility or resistance to periodontal disease to enable us to usher in a new generation of periodontal diagnostics, risk assessments and enable targeted therapeutics;as a realization of personalized medicine.

Public Health Relevance

This application seeks to conduct a genome-wide association study (GWAS) to identify candidate genes that are associated with edentulism, gingivitis and periodontal disease using two representative community dwelling populations of approximately 11,084 individuals. This project seeks to perform a GWAS meta-analysis on this population that has full genotyping, clinical phenotyping medical and risk factor data, and replicating the findings using a third database of over 1000 subjects. This is a unique opportunity to perform the first GWAS on periodontal disease in representative community populations with a range of disease, and to conduct gene-environment interaction analyses using microbial load, metabolic status (diabetes and obesity) and smoking as exposures. Our goal is to identify new genes that confer susceptibility and resistance to periodontal disease to enable us to usher in a new era of periodontal diagnostics, risk assessment and targeted therapy.

Agency
National Institute of Health (NIH)
Institute
National Institute of Dental & Craniofacial Research (NIDCR)
Type
Research Project (R01)
Project #
1R01DE021418-01
Application #
8023292
Study Section
Infectious Diseases, Reproductive Health, Asthma and Pulmonary Conditions Study Section (IRAP)
Program Officer
Harris, Emily L
Project Start
2011-07-01
Project End
2013-06-30
Budget Start
2011-07-01
Budget End
2012-06-30
Support Year
1
Fiscal Year
2011
Total Cost
$332,048
Indirect Cost
Name
University of North Carolina Chapel Hill
Department
Dentistry
Type
Schools of Dentistry
DUNS #
608195277
City
Chapel Hill
State
NC
Country
United States
Zip Code
27599
Beck, James D; Moss, Kevin L; Morelli, Thiago et al. (2018) Periodontal profile class is associated with prevalent diabetes, coronary heart disease, stroke, and systemic markers of C-reactive protein and interleukin-6. J Periodontol 89:157-165
Morelli, Thiago; Moss, Kevin L; Preisser, John S et al. (2018) Periodontal profile classes predict periodontal disease progression and tooth loss. J Periodontol 89:148-156
Beck, James D; Moss, Kevin L; Morelli, Thiago et al. (2018) In search of appropriate measures of periodontal status: The Periodontal Profile Phenotype (P3 ) system. J Periodontol 89:166-175
Marchesan, Julie T; Jiao, Yizu; Moss, Kevin et al. (2017) Common Polymorphisms in IFI16 and AIM2 Genes Are Associated With Periodontal Disease. J Periodontol 88:663-672
Morelli, Thiago; Moss, Kevin L; Beck, James et al. (2017) Derivation and Validation of the Periodontal and Tooth Profile Classification System for Patient Stratification. J Periodontol 88:153-165
Sanders, A E; Sofer, T; Wong, Q et al. (2017) Chronic Periodontitis Genome-wide Association Study in the Hispanic Community Health Study / Study of Latinos. J Dent Res 96:64-72
Shusterman, A; Munz, M; Richter, G et al. (2017) The PF4/PPBP/CXCL5 Gene Cluster Is Associated with Periodontitis. J Dent Res 96:945-952
Zhang, Shaoping; Divaris, Kimon; Moss, Kevin et al. (2016) The Novel ASIC2 Locus is Associated with Severe Gingival Inflammation. JDR Clin Trans Res 1:163-170
Yu, N; Barros, S P; Zhang, S et al. (2015) Insulin Response Genes in Different Stages of Periodontal Disease. J Dent Res 94:194S-200S
Rhodin, K; Divaris, K; North, K E et al. (2014) Chronic periodontitis genome-wide association studies: gene-centric and gene set enrichment analyses. J Dent Res 93:882-90

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