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- Title
Genome-wide association study of dental caries in the Hispanic Communities Health Study/Study of Latinos (HCHS/SOL).
- Authors
Morrison, Jean; Laurie, Cathy C.; Marazita, Mary L.; Sanders, Anne E.; Offenbacher, Steven; Salazar, Christian R.; Conomos, Matthew P.; Thornton, Timothy; Jain, Deepti; Laurie, Cecelia A.; Kerr, Kathleen F.; Papanicolaou, George; Taylor, Kent; Kaste, Linda M.; Beck, James D.; Shaffer, John R.
- Abstract
Dental caries is the most common chronic disease worldwide, and exhibits profound disparities in the USA with racial and ethnic minorities experiencing disproportionate disease burden. Though heritable, the specific genes influencing risk of dental caries remain largely unknown. Therefore, we performed genome-wide association scans (GWASs) for dental caries in a population-based cohort of 12 000 Hispanic/Latino participants aged 18-74 years from the HCHS/SOL. Intra-oral examinations were used to generate two common indices of dental caries experience which were tested for association with 27.7 Mgenotyped or imputed single-nucleotide polymorphisms separately in the six ancestry groups. A mixed-models approach was used, which adjusted for age, sex, recruitment site, five principal components of ancestry and additional features of the sampling design. Meta-analyses were used to combine G WAS results across ancestry groups. Heritability estimates ranged from 20-53% in the six ancestry groups. The most significant association observed via meta-analysis for both phenotypes was in the region of the NAMPT gene (rs190395159; P-value = 6 × 10-10), which is involved in many biological processes including periodontal healing. Another significant association was observed for rs72626594 (P-value = 3 × 10-8) downstream of BMP7, a tooth development gene. Other associations were observed in genes lacking known or plausible roles in dental caries. In conclusion, this was the largest GWAS of dental caries, to date and was the first to target Hispanic/Latino populations. Understanding the factors influencing dental caries susceptibility may lead to improvements in prediction, prevention and disease management, which may ultimately reduce the disparities in oral health across racial, ethnic and socioeconomic strata.
- Publication
Human Molecular Genetics, 2016, Vol 25, Issue 4, p807
- ISSN
0964-6906
- Publication type
Article
- DOI
10.1093/hmg/ddv506