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Journal of Dental Research
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Biological

Identification of Genes Differentially Regulated in Rat Alveolar Bone Wound Healing by Subtractive Hybridization

T. Ohira, F. Myokai, N. Shiomi, K. Yamashiro, T. Yamamoto, Y. Murayama, H. Arai, F. Nishimura and S. Takashiba*

Department of Pathophysiology-Periodontal Science, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8525, Japan;

Correspondence: * corresponding author, stakashi{at}cc.okayama-u.ac.jp

Periodontal healing requires the participation of regulatory molecules, cells, and scaffold or matrix. Here, we hypothesized that a certain set of genes is expressed in alveolar bone wound healing. Reciprocal subtraction gave 400 clones from the injured alveolar bone of Wistar rats. Identification of 34 genes and analysis of their expression in injured tissue revealed several clusters of unique gene regulation patterns, including the up-regulation at 1 wk of cytochrome c oxidase regulating electron transfer and energy metabolism, presumably occurring at the site of inflammation; up-regulation at 2.5 wks of pro-{alpha}-2 type I collagen involving the formation of a connective tissue structure; and up-regulation at 1 and 2 wks and down-regulation at 2.5 and 4 wks of ubiquitin carboxyl-terminal hydrolase l3 involving cell cycle, DNA repair, and stress response. The differential expression of genes may be associated with the processes of inflammation, wound contraction, and formation of a connective tissue structure.

Key Words: subtractive hybridization • gene expression • alveolar bone • wound healing

Journal of Dental Research, Vol. 83, No. 7, 546-551 (2004)
DOI: 10.1177/154405910408300707
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