title: Effect of MMP-1 promoter polymorphisms on GCF MMP-1 levels and outcome of periodontal therapy in patients with severe chronic periodontitis.
abstract: OBJECTIVE
  The aims of this study were to investigate (1) the matrix metalloproteinase-1 (MMP-1) promoter polymorphisms in severe chronic periodontitis (CP), (2) the relationship of periodontal therapy outcome with these genotypes, and (3) the gingival crevicular fluid (GCF) MMP-1 levels-MMP-1 genotype correlation.
  
  
  METHODS
  Genomic DNA was obtained from the peripheral blood of 102 patients with severe CP and 98 periodontally healthy subjects. MMP-1 -519A/G and -1607 1G/2G polymorphisms were determined by the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. Fifty-eight CP patients received non-surgical periodontal therapy and were followed for 6 months. Clinical periodontal parameters and GCF samples were collected at baseline and at 6 months. GCF MMP-1 levels were analysed by enzyme-linked immunosorbent assay (ELISA).
  
  
  RESULTS
  The distribution of MMP-1 genotypes did not significantly differ between the study groups. On the other hand, the -1607 2G allele frequency of severe CP patients was higher than that of healthy subjects. MMP-1 -519G allele carriers had higher GCF MMP-1 levels and percentage of sites with 4-6 mm clinical attachment level (CAL) compared with AA genotypes after non-surgical periodontal therapy (p<0.05).
  
  
  CONCLUSIONS
  These data suggest that the -1607 2G polymorphic allele of the MMP-1 gene could be associated with susceptibility to severe CP in the Turkish population. It seems that -519AG and GG genotypes could play a role in the outcome of periodontal therapy.
authors: Department of Periodontology, School of Dentistry, Ege University, Izmir, Turkey.
authors: Demet
authors: D
authors: Pirhan
authors: Gül
authors: G
authors: Atilla
authors: Gülnur
authors: G
authors: Emingil
authors: Timo
authors: T
authors: Sorsa
authors: Taina
authors: T
authors: Tervahartiala
authors: Afig
authors: A
authors: Berdeli
mesh_terms: D000328:Adult; D000368:Aged; D000483:Alleles; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D055113:Chronic Periodontitis / Q000201:enzymology* / Q000235:genetics / Q000628:therapy; D012534:Dental Scaling; D005260:Female; D005787:Gene Frequency; D005883:Gingival Crevicular Fluid / Q000201:enzymology*; D006801:Humans; D008297:Male; D020781:Matrix Metalloproteinase 1 / Q000235:genetics* / Q000378:metabolism; D008875:Middle Aged; D010512:Periodontal Index; D011110:Polymorphism, Genetic; D011401:Promoter Regions, Genetic / Q000235:genetics; D012016:Reference Values; D012720:Severity of Illness Index; D016896:Treatment Outcome
chemical_list: D020781:Matrix Metalloproteinase 1