title: Levels of common salivary protein 1 in healthy subjects and periodontal patients.
abstract: OBJECTIVE
  Human saliva, as a vital part of the immune defense system, contains a number of distinct proteins and peptides. Recently human common salivary protein 1 (CSP1) has been identified as an abundant salivary protein and may play a role in promoting the binding of cariogenic bacteria to salivary pellicles. However, nothing else is known regarding the role of CSP1 in periodontology. The aim of this study was to quantify and compare CSP1 levels between healthy subjects and periodontal patients.
  
  
  METHODS
  This controlled clinical study was conducted in periodontally healthy individuals and patients with chronic periodontitis Chonbuk National University Hospital, with Institutional Review Board approval. Whole saliva samples were collected from 36 healthy subjects and 33 chronic periodontitis patients and analyzed. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis and immune blotting were conducted to ensure that anti-CSP1 monoclonal antibody (mAb) binds to CSP1 in human saliva. A sandwich enzyme-linked immunosorbent assay (ELISA) system was house-fabricated using mAb-hCSP1#14 and mAb-hCSP1#4 as a capture and a detector mAb, respectively. The CSP1 concentrations in saliva from 36 healthy subjects and 33 periodontal patients were quantified using the CSP1 sandwich ELISA system, and the results were analyzed using the Student'st-test.
  
  
  RESULTS
  Immunoblot analysis using mAb-hCSP1 as a probe confirmed that CSP1 in human saliva existed as a single band with a molecular weight of approximately 27-kDa. The quantification of CSP1 concentrations by CSP1 ELISA showed that the median values (25th to 75th percentiles) of periodontal patients and healthy subjects were 9,474 ng/mL (range, 8,434-10,139 ng/mL) and 8,598 ng/mL (range, 7,421-9,877 ng/mL), respectively. The Student'st-test indicated the presence of a statistically significant difference between the 2 groups (P=0.024).
  
  
  CONCLUSIONS
  The presence of a significant difference in CSP1 levels between healthy subjects and periodontal patients suggests that CSP1 may be a potential biomarker for the detection or screening of periodontitis patients.
authors: Department of Periodontology, Chonbuk National University School of Dentistry, Jeonju, Korea.; Research Institute of Clinical Medicine of Chonbuk National University, Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea.
authors: Seok-Mo
authors: 0000-0002-2511-8123
authors: SM
authors: Heo
authors: Department of Periodontology, Chonbuk National University School of Dentistry, Jeonju, Korea.; Research Institute of Clinical Medicine of Chonbuk National University, Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea.
authors: Sol
authors: 0000-0003-0452-9625
authors: S
authors: Lee
authors: Boditech (Qingdao) Biotechnology Co., LTD, Qingdao, China .
authors: HongTao
authors: 0000-0001-9030-3715
authors: H
authors: Wang
authors: BoditechMed Inc., Chuncheon, Korea .
authors: Jeong Hyeok
authors: 0000-0002-5543-7600
authors: JH
authors: Jeong
authors: Department of Biology Education, Institute of Fusion Science, Chonbuk National University, Jeonju, Korea .
authors: Sang Wook
authors: 0000-0002-3919-8769
authors: SW
authors: Oh
keywords: Common salivary protein 1; Enzyme-linked immunosorbent assay; Monoclonal antibody; Periodontitis; Saliva