title: Gingival crevicular fluid levels of MMP-8, MMP-9, TIMP-2, and MPO decrease after periodontal therapy.
abstract: BACKGROUND
  This study aimed at comparing the levels of matrix metalloproteinase (MMP)-8, tissue Inhibitor of MMPs (TIMP)-1 and TIMP-2, Myeloperoxidase (MPO), and MMP-9 in the gingival crevicular fluid (GCF) of chronic periodontitis (CP) patients and controls at baseline and 3 months after non-surgical therapy.
  
  
  METHODS
  GCF was collected from one site of 15 control subjects and 27 CP patients. MMP-8, MMP-9, TIMP-1, and TIMP-2 were determined by Enzyme-linked immunoabsorbent assay; different forms of MMP-9, by gelatin zymography; and MPO, colorimetrically.
  
  
  RESULTS
  At baseline, higher levels of MMP-8, TIMP-2, MPO, and the 87 kDa-MMP-9 were found in patients compared with controls (p<0.001), and these molecules decreased after therapy (p<0.03). There were no differences between the groups with respect to the higher molecular forms of MMP-9 (180, 130, 92 kDa) or total MMP-9 at baseline. No differences were observed in TIMP-1 levels. In controls, decreased levels of TIMP-2 and the higher molecular forms of MMP-9 (180, 130, 92 kDa) were found 3 months after therapy compared with baseline (p<0.01).
  
  
  CONCLUSIONS
  Higher levels of MMP-8, TIMP-2, MPO, and 87 kDa MMP-9 were found in the GCF of patients compared with controls, and these markers decreased 3 months after periodontal therapy.
authors.affiliation: Department of Buco-Maxilo-Facial Surgery and Periodontology, Dental School of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, SP, Brazil.
authors.forename: Andrea M
authors.initials: AM
authors.lastname: Marcaccini
authors.forename: Cesar A
authors.initials: CA
authors.lastname: Meschiari
authors.forename: Leonardo R
authors.initials: LR
authors.lastname: Zuardi
authors.forename: Tiago Sampaio
authors.initials: TS
authors.lastname: de Sousa
authors.forename: Mario
authors.initials: M
authors.lastname: Taba
authors.forename: Juliana M
authors.initials: JM
authors.lastname: Teofilo
authors.forename: Anna L B
authors.initials: AL
authors.lastname: Jacob-Ferreira
authors.forename: Jose E
authors.initials: JE
authors.lastname: Tanus-Santos
authors.forename: Arthur B
authors.initials: AB
authors.lastname: Novaes
authors.forename: Raquel F
authors.initials: RF
authors.lastname: Gerlach
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D055113:Chronic Periodontitis / Q000201:enzymology* / Q000276:immunology / Q000628:therapy; D005260:Female; D005881:Gingiva / Q000201:enzymology; D005883:Gingival Crevicular Fluid / Q000201:enzymology* / Q000276:immunology; D006801:Humans; D008297:Male; D020784:Matrix Metalloproteinase 8 / Q000378:metabolism*; D020780:Matrix Metalloproteinase 9 / Q000378:metabolism*; D008875:Middle Aged; D009195:Peroxidase / Q000378:metabolism*; D012016:Reference Values; D018709:Statistics, Nonparametric; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000378:metabolism; D019716:Tissue Inhibitor of Metalloproteinase-2 / Q000378:metabolism*; D016896:Treatment Outcome
chemical_list: D019715:Tissue Inhibitor of Metalloproteinase-1; D019716:Tissue Inhibitor of Metalloproteinase-2; D009195:Peroxidase; D020784:Matrix Metalloproteinase 8; D020780:Matrix Metalloproteinase 9