Proinflammatory (CD14+CD16++) monocytes in type 2 diabetes mellitus patients with/without chronic periodontitis

Raghunathan Jagannathan, Malini Thayman, Suresh Ranga Rao

Abstract


Background: Until date, the proportion of nonclassic monocytes in type 2 diabetic mellitus patients
with and without chronic periodontitis has not been evaluated based on glycemic control. The
objective of this study was to compare the proportion of CD14+CD16++ monocytes in type 2
diabetic patients with and without chronic periodontitis.
Materials and Methods: In this cross sectional study A total of sixty individuals with type 2 diabetes
mellitus (n = 15/group) were recruited. Individuals were grouped based on glycosylated hemoglobin
A (HbA 1c) values and the presence of chronic periodontitis; Group 1 (diabetes mellitus with good
glycemic control), Group 2 (diabetes mellitus with poor glycemic control), Group 3 (diabetic mellitus
with chronic periodontitis and good glycemic control), Group 4 (diabetic mellitus with chronic
periodontitis and poor glycemic control). Fluorochrome‑conjugated monoclonal antibodies against
CD14, CD16, and human leukocyte antigen–antigen D related was used to analyze the proportion
of nonclassic monocytes by flow cytometry. One‑way ANOVA with Tukey’s post‑hoc test was used
to assess the significant differences in monocyte subpopulations. The Pearson’s correlation test
was used to assess the relationship between hemoglobin A1c values and percentage of nonclassical
monocytes. In both the above statistical tools, the value of P < 0.05 is considered as significant level.
Results: Group 4 had the highest percentage of CD14+CD16++ monocytes 14.67% + 4.70%,
followed by Group 3‑9.73% + 0.60%, Group 2‑9.32% + 2.03% and Group 1‑5.92% + 0.63% (P < 0.001).
Further, a statistically significant positive correlation between HbA (1c) levels and the proportion
of CD14+CD16++ monocytes was observed.
Conclusion: In the present study, we observed type 2 diabetes mellitus patients with poor
glycemic control and chronic periodontitis showed more than two‑fold increase in the proportion
of nonclassic monocytes compared to type 2 diabetes mellitus patients with good glycemic control.
Key Words: Chronic periodontitis, diabetes mellitus, monocytes

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