title: Tissue inhibitor of metalloproteinases-1, matrix metalloproteinases-1 and -8, and collagenase activity levels in peri-implant crevicular fluid after implantation.
abstract: The integrity of connective tissues surrounding dental implants may be influenced by a balance between matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs). The purpose of this study was to provide an overall assessment of TIMP-1, MMP-1 and -8 levels as well as collagenase activities during the wound healing process after implantation and in peri-implantitis lesions. Peri-implant crevicular fluid (PICF) was sampled with sterile paper strips from 10 osseointegrated implants of 6 subjects. Ten implants from 6 patients affected with peri-implantitis were also assessed. Gingival crevicular fluid (GCF) from 11 periodontitis-affected patients and 10 healthy volunteers served as controls. TIMP-1 and MMP-1 and -8 protein levels in the PICF were measured by ELISA, and active and APMA-activatable collagenase activities were determined by functional assays using image-analysis after SDS-PAGE. The experiment showed a significant increase in the TIMP-1 level at 1 week after implantation as compared with that in GCF from healthy periodontium. Four weeks after implantation it had reached the same level as that in the GCF of healthy subjects. The data has also disclosed a higher post-implantation collagenase activity level at 1 week than at weeks 2, 4, and 12. This may be due to the increase in MMP-1 and -8. Furthermore, peri-implantitis and periodontitis were shown to be similar inflammatory lesions in respect to MMP-1 and -8 and collagenase activities, even though the TIMP-1/MMP-1 + MMP-8 ratio was significantly lower in peri-implantitis than in periodontitis. In conclusion, the overproduction of TIMP-1 in the wound area after implantation could, to some extent, inhibit excessive tissue destruction and degradation of the neo-matrix in wound repair due to MMPs.
authors.affiliation: Department of Periodontology, Niigata University Faculty of Dentistry, Niigata, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nomura
authors.forename: A
authors.initials: A
authors.lastname: Ishii
authors.forename: H
authors.initials: H
authors.lastname: Shimizu
authors.forename: N
authors.initials: N
authors.lastname: Taguchi
authors.forename: H
authors.initials: H
authors.lastname: Yoshie
authors.forename: H
authors.initials: H
authors.lastname: Kusakari
authors.forename: K
authors.initials: K
authors.lastname: Hara
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D017364:Collagenases / Q000378:metabolism; D003758:Dental Implantation, Endosseous / Q000009:adverse effects*; D015921:Dental Implants / Q000009:adverse effects*; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay; D005883:Gingival Crevicular Fluid / Q000201:enzymology*; D006801:Humans; D007124:Immunoenzyme Techniques; D020781:Matrix Metalloproteinase 1 / Q000378:metabolism; D020784:Matrix Metalloproteinase 8 / Q000378:metabolism; D020782:Matrix Metalloproteinases / Q000378:metabolism*; D016348:Osseointegration; D010518:Periodontitis / Q000201:enzymology* / Q000209:etiology; D018709:Statistics, Nonparametric; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000378:metabolism; D014945:Wound Healing / Q000502:physiology
chemical_list: D015921:Dental Implants; D019715:Tissue Inhibitor of Metalloproteinase-1; D017364:Collagenases; D020782:Matrix Metalloproteinases; D020784:Matrix Metalloproteinase 8; D020781:Matrix Metalloproteinase 1