1233-P: The Association between Subgingival Microbiome, Subclinical Cardiovascular Disease, and Type 1 Diabetes

Abstract

Background: Dysbiosis in the subgingival microbiome is the root cause of periodontal disease, a risk factor of cardiovascular disease (CVD), but its association with subclinical CVD, particularly among those with type 1 diabetes (T1D) is unclear. Methods: We included 283 subjects with (n=141) and without (n=142) T1D. We performed 16S rDNA sequencing on subgingival plaque samples and identified amplicon sequence variants. Subclinical CVD was measured by carotid intima-media thickness (cIMT), pulse wave velocity (PWV), and brachial artery distensibility (BrachD). Results: Beta diversity differed between T1D and the nondiabetes (ND) group (F = 1.66, P=0.024). As shown in Figure 1, in the stratified generalized linear model (adjusted for age, gender, race, smoking, alcohol drinking, BMI, and additionally HbA1c in the T1D model), we observed 4 taxa in the T1D group and 28 taxa in the ND group to be associated with cIMT (all Padj< 0.05). Moreover, 8 and 17 taxa were associated with BrachD (lower value suggests worse status) in T1D and ND groups, and 6 and 5 for PWV (all Padj < 0.05). Some associations were in opposite directions by diabetes status, especially for cIMT. Conclusion: We observed differences in the subgingival microbiome profile between those with and without T1D. Subgingival microbiome taxa were associated with subclinical CVD measures, with some differences observed by diabetes status. Disclosure M. Xiao: None. A. Sarkar: None. J.K. Snell-Bergeon: None. S. Chandrasekaran: None. L.R. Johnson: None. B.R. Burkhardt: None. J. Petrosino: None. A.C. Alman: None. Funding National Institutes of Health (5R01DE026480)