Receptor activator of nuclear factor-kappa B ligand/osteoprotegerin ratio in sites of chronic periodontitis of subjects with poorly and well-controlled type 2 diabetes.

Department of Periodontology, Dental Research Division, Guarulhos University, São Paulo, Brazil.
Journal of Periodontology (Impact Factor: 2.4). 10/2010; 81(10):1455-65. DOI: 10.1902/jop.2010.100125
Source: PubMed

ABSTRACT The aim of this study is to evaluate the levels of osteoclastogenesis-related factors (soluble receptor activator of nuclear factor-kappa B ligand [sRANKL] and osteoprotegerin [OPG]) in gingival crevicular fluid (GCF) from subjects with poorly and well-controlled type 2 diabetes and chronic periodontitis before and after periodontal therapy.
Eighteen subjects with well-controlled diabetes (glycated hemoglobin [HbA1c] levels ≤ 8%) and 20 subjects with poorly controlled diabetes (HbA1c levels >8%) were enrolled in this study. All subjects were submitted to non-surgical periodontal therapy. GCF sampling and clinical periodontal parameters were assessed at baseline and 3 and 6 months post-therapy. Total amounts and concentrations of sRANKL and OPG in GCF were analyzed by enzyme-linked immunosorbent assay (ELISA).
Total amounts and concentrations of sRANKL and RANKL/OPG ratios were higher in poorly controlled subjects than in well-controlled subjects at baseline and 3 and 6 months post-therapy (P <0.05). In addition, RANKL/OPG ratios decreased in well-controlled subjects (P <0.05) but not in poorly controlled subjects (P >0.05) at 3 months post-therapy. Almost all clinical parameters improved significantly for both groups post-treatment (P <0.05).
RANKL/OPG ratios in untreated and treated periodontitis sites may be negatively influenced by poor glycemic control in subjects with type 2 diabetes.

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