Volume 83, Issue 6 p. 766-772
Translational Periodontology

Salivary Levels of Antibacterial Peptide (LL-37/hCAP-18) and Cotinine in Patients With Chronic Periodontitis

Yasuo Takeuchi

Corresponding Author

Yasuo Takeuchi

Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.

Correspondence: Yasuo Takeuchi, Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, 113-8549 Tokyo, Japan. Fax: 81-3-5803-0196; e-mail: [email protected].Search for more papers by this author
Toshiyuki Nagasawa

Toshiyuki Nagasawa

Section of Periodontology and Endodontology, Health Sciences University of Hokkaido, Hokkaido, Japan.

Search for more papers by this author
Sayaka Katagiri

Sayaka Katagiri

Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.

Search for more papers by this author
Satoshi Kitagawara

Satoshi Kitagawara

Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.

Search for more papers by this author
Hiroaki Kobayashi

Hiroaki Kobayashi

Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.

Search for more papers by this author
Tatsurou Koyanagi

Tatsurou Koyanagi

Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.

Search for more papers by this author
Yuichi Izumi

Yuichi Izumi

Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.

Global Center of Excellence Program for Tooth and Bone Research, Tokyo Medical and Dental University.

Search for more papers by this author
First published: 01 June 2012
Citations: 26

Abstract

Background: The purpose of this study is to examine the relationship between salivary LL-37 levels and clinical severity in patients with chronic periodontitis (CP). The presence/absence of four periodontopathic bacteria and salivary cotinine levels were also examined to assess the impact of these factors on LL-37 production.

Methods: Unstimulated salivary samples were collected from 69 patients with CP. Salivary concentrations of LL-37 and cotinine were measured by enzyme-linked immunosorbent assay. Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Tannerella forsythia, and Treponema denticola in saliva were detected by polymerase chain reaction. Periodontal examination included determination of probing depth (PD), clinical attachment level, bleeding on probing, and plaque control record.

Results: Mean salivary LL-37 concentration was 225.0 ± 227.2 ng/mL, and a high prevalence of periodontopathic bacteria was observed. The stepwise ordinal logistic regression model showed that high salivary LL-37 levels were significantly associated with the presence of T. denticola and higher percentage of teeth with PD ≥5 mm. In addition, higher salivary cotinine levels (≥8 ng/mL) were negatively associated with salivary LL-37 levels.

Conclusions: Salivary LL-37 level was positively correlated with severe periodontal destruction, and production was apparently associated with periodontopathic bacterial infection. The negative correlations between salivary LL-37 and cotinine levels also suggest that smoking or long-term exposure to environmental tobacco smoke can lead to lower LL-37 levels in the oral cavity and increased risk of periodontitis.