Identification of tissue inhibitor of metalloproteinases-1 (TIMP-1) in human teeth and its distribution in cementum and dentine.
An inhibitory activity toward matrix metalloproteinases such as interstitial collagenase, 72-kDa gelatinase/type IV collagenase, and stromelysin-1 was detected in an EDTA extract of pulverized roots of human teeth, and identified as TIMP-1 by sodium dodecyl sulphate-polyacrylamide gel electrophoresis and immunoblotting. Distribution of TIMP-1 in human cementum and dentine was investigated by a sandwich enzyme immunoassay in combination with an abrasive microsampling technique. TIMP-1 could not be detected in cementum from some teeth but in others decreased from a fairly low value at the surface towards the cementodentinal junction. TIMP-1 concentrations in the dentine increased consistently from the cementodentinal junction toward the predentine. The average TIMP-1 concentration in the dentine (54.1 +/- 18.5 pg/mg +/- SE) was significantly (P < 0.05) higher than that (9.6 +/- 6.0 pg/mg +/- SE) in the cementum.
Department of Preventive Dentistry and Dental Public Health, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan.
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Ishiguro
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Yamashita
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Nakagaki
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K
Iwata
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T
Hayakawa
D000293:Adolescent; D000328:Adult; D000818:Animals; D016466:CHO Cells; D006224:Cricetinae; D003739:Dental Cementum / Q000201:enzymology*; D003804:Dentin / Q000201:enzymology*; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D006023:Glycoproteins / Q000302:isolation & purification*; D006801:Humans; D008297:Male; D061965:Matrix Metalloproteinase Inhibitors; D008666:Metalloendopeptidases / Q000302:isolation & purification*; D019714:Tissue Inhibitor of Metalloproteinases; D014092:Tooth Root / Q000201:enzymology
D006023:Glycoproteins; D061965:Matrix Metalloproteinase Inhibitors; D019714:Tissue Inhibitor of Metalloproteinases; D008666:Metalloendopeptidases