期刊
ARCHIVES OF ORAL BIOLOGY
卷 53, 期 2, 页码 109-116出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.archoralbio.2007.09.012
关键词
distribution; matrix metalloproteinase-2; immunohistochemistry; human coronal dentin
资金
- NIDCR NIH HHS [R21 DE015876, DE10489, R01 DE010489, R01 DE010489-10, R21 DE020909, DE015876] Funding Source: Medline
While it is known that matrixmetalloproteinase-2 (MMP-2) is present in dentin, its distribution and role in human dentin formation and pathology are not well understood. Objective To characterize the distribution of MMP-2 in human coronal dentin. Methods Immunohistochemistry was used to investigate the distribution of MMP-2 in coronal dentin. Freshly extracted human premolars and third molars (age range 12-30) were fixed with formaldehyde, demineralized with 10% EDTA (pH 7.4) and embedded in paraffin. Serial sections were made and subjected to immunohistochemical analysis using a specific monoclonal anti-MMP-2 antibody. Immunoreactivity was visualized with 3,3'-diaminobenzidine substrate and observed under light microscopy. ImageJ software was used to calculate the relative amount/distribution of MMP-2. Results The analysis revealed immunoreactivity for MMP-2 throughout human coronal dentin. However, intense immunore activities were identified in a 90-200 mu m zone adjacent to the pre-dentin as well as a 9-10 mu m wide zone adjacent to the dentinoenamel junction (DEJ). Conclusion MMP-2 has a specific distribution in human coronal dentin indicating it's involvement in extracellular matrix organization in predentin and the establishment of the DEJ. (C) 2007 Elsevier Ltd. All rights reserved.
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