@article {10743, title = {A genome-wide association study identifies an association between variants in EFCAB4B gene and periodontal disease in an Italian isolated population.}, journal = {J Periodontal Res}, volume = {53}, year = {2018}, month = {2018 Dec}, pages = {992-998}, abstract = {

BACKGROUND AND OBJECTIVE: Periodontitis in one of the most prevalent dental diseases. Despite numerous studies have investigated its aetiopathogenetic factors, few works have focused on its genetic predisposition and most of them took into account only candidate genes. Therefore, we conducted a Genome Wide Association Study in an Italian isolated population aimed at uncovering genetic variants that predispose to this disorder.

METHODS: Diagnosis of chronic periodontitis was made following the criteria of the American Academy of Periodontology. Patients with chronic periodontitis were grouped into different categories: slight, severe, localized and generalized. A control group composed by people without signs of periodontitis or gingivitis was defined. DNA was genotyped using 370k Illumina chips. Linear mixed model regression was used to test the association between each single nucleotide polymorphism (SNP) (independent variable) and the periodontitis status (dependent variable), controlling for confounders sex, age and smoking. The genomic kinship matrix was also used as random effect.

RESULTS: Four SNPs on the gene EFCAB4B resulted significantly associated to localized periodontitis (P~<~5~{\texttimes}~10 ), with the best hit on the rs242016 SNP (P~=~1.5~{\texttimes}~10 ).

CONCLUSION: We have identified a novel significant association between the EFCAB4B gene and localized periodontitis. These results open a new perspective in the understanding of genetic factors contributing to this common disorder.

}, keywords = {Adolescent, Adult, Aged, Aged, 80 and over, Calcium-Binding Proteins, Chronic Periodontitis, DNA, Female, Genetic Predisposition to Disease, Genome-Wide Association Study, Genotype, Humans, Italy, Male, Middle Aged, Polymorphism, Single Nucleotide, Regression Analysis, Young Adult}, issn = {1600-0765}, doi = {10.1111/jre.12598}, author = {Bevilacqua, Lorenzo and Navarra, Chiara O and Pirastu, Nicola and Lenarda, Roberto Di and Gasparini, Paolo and Robino, Antonietta} } @article {7738, title = {Polymorphisms in sweet taste genes (TAS1R2 and GLUT2), sweet liking, and dental caries prevalence in an adult Italian population.}, journal = {Genes Nutr}, volume = {10}, year = {2015}, month = {2015 Sep}, pages = {485}, abstract = {

The aim of the study was to assess the relationship between sweet taste genes and dental caries prevalence in a large sample of adults. In addition, the association between sweet liking and sugar intake with dental caries was investigated. Caries was measured by the decayed, missing, filled teeth (DMFT) index in 647 Caucasian subjects (285 males and 362 females, aged 18-65~years), coming from six villages in northeastern Italy. Sweet liking was assessed using a 9-point scale, and the mean of the liking given by each individual to specific sweet food and beverages was used to create a sweet liking score. Simple sugar consumption was estimated by a dietary history interview, considering both added sugars and sugar present naturally in foods. Our study confirmed that polymorphisms in TAS1R2 and GLUT2 genes are related to DMFT index. In particular, GG homozygous individuals for rs3935570 in TAS1R2 gene (p value~=~0.0117) and GG homozygous individuals for rs1499821 in GLUT2 gene (p value~=~0.0273) showed higher DMFT levels compared to both heterozygous and homozygous for the alternative allele. Furthermore, while the relationship sugar intake-DMFT did not achieve statistical significance (p value~=~0.075), a significant association was identified between sweet liking and DMFT (p value~=~0.004), independent of other variables. Our study showed that sweet taste genetic factors contribute to caries prevalence and highlighted the role of sweet liking as a predictor of caries risk. Therefore, these results may open new perspectives for individual risk identification and implementation of target preventive strategies, such as identifying high-risk patients before caries development.

}, issn = {1555-8932}, doi = {10.1007/s12263-015-0485-z}, author = {Robino, Antonietta and Bevilacqua, Lorenzo and Pirastu, Nicola and Situlin, Roberta and Di Lenarda, Roberto and Gasparini, Paolo and Navarra, Chiara Ottavia} }