title: SAA and PLTP activity in plasma of periodontal patients before and after full-mouth tooth extraction.
abstract: OBJECTIVE
  To assess whether treatment of advanced periodontal disease affects plasma levels of serum amyloid A (SAA) and phospholipid transfer protein (PLTP) activity.
  
  
  METHODS
  We measured the levels of SAA and PLTP activity in plasma of 66 patients with advanced periodontal disease before and after treatment by full-mouth tooth extraction (FME).
  
  
  RESULTS
  At baseline, median SAA levels in our study population were within the normal range (2.7 microg ml(-1)) but SAA was elevated (>5 microg ml(-1)) in 18% of periodontitis patients. Three months after FME, SAA levels were significantly reduced (P = 0.04). SAA did not correlate with any of the periodontal disease parameters. PLTP activity was elevated in patients with periodontitis, compared to the PLTP activity reference group (age-matched systemically healthy adults, n = 29; 18 micromol ml(-1) h(-1)vs 13 micromol ml(-1) h(-1), respectively, P = 0.002). PLTP activity inversely correlated with average periodontal pocket depth (PPD) per tooth (r(s) = -0.372; P = 0.002). Three months after FME, median PLTP activity did not change significantly.
  
  
  CONCLUSIONS
  Full-mouth tooth extraction significantly reduces SAA, a marker of inflammation, while it does not affect plasma PLTP activity. However, the inverse correlation between PLTP activity and average PPD suggests that increased PLTP activity may limit periodontal tissue damage.
authors.affiliation: Department of Medicine, University of Washington, Seattle, Washington 98109, United States. simona@u.washington.edu
authors.forename: S
authors.initials: S
authors.lastname: Vuletic
authors.forename: B A
authors.initials: BA
authors.lastname: Taylor
authors.forename: G H
authors.initials: GH
authors.lastname: Tofler
authors.forename: A
authors.initials: A
authors.lastname: Chait
authors.forename: S M
authors.initials: SM
authors.lastname: Marcovina
authors.forename: K
authors.initials: K
authors.lastname: Schenck
authors.forename: J J
authors.initials: JJ
authors.lastname: Albers
mesh_terms: D000328:Adult; D002097:C-Reactive Protein / Q000032:analysis; D016022:Case-Control Studies; D015331:Cohort Studies; D003327:Coronary Disease / Q000235:genetics; D048909:Diabetes Complications; D005260:Female; D005500:Follow-Up Studies; D005889:Gingival Recession / Q000628:therapy; D006801:Humans; D006949:Hyperlipidemias / Q000150:complications; D006973:Hypertension / Q000150:complications; D007958:Leukocyte Count; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D009504:Neutrophils / Q000473:pathology; D017622:Periodontal Attachment Loss / Q000628:therapy; D010510:Periodontal Diseases / Q000097:blood / Q000628:therapy*; D010514:Periodontal Pocket / Q000097:blood / Q000628:therapy; D010518:Periodontitis / Q000097:blood / Q000628:therapy; D016491:Peripheral Vascular Diseases / Q000150:complications; D049294:Phospholipid Transfer Proteins / Q000097:blood*; D012307:Risk Factors; D000685:Serum Amyloid A Protein / Q000032:analysis*; D012907:Smoking; D014081:Tooth Extraction
chemical_list: D049294:Phospholipid Transfer Proteins; D000685:Serum Amyloid A Protein; D002097:C-Reactive Protein