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Title: [Expression of matrix metalloproteinase-3 and tissue inhibitor metalloproteinases-1 in regenerated rabbit bone after mandibular osteodistraction]. Author: Zou S, Wang Z, Hu J. Journal: Hua Xi Kou Qiang Yi Xue Za Zhi; 2003 Oct; 21(5):342-3, 363. PubMed ID: 14650982. Abstract: OBJECTIVE: To observe the expression patterns of matrix metalloproteinase-3 and its inhibitor, tissue inhibitor metalloproteinases (TIMP)-1, in remodeling phase of mandibular distraction osteogenesis. METHODS: Bilateral mandibular osteotomies were performed in 8 mature rabbits. The mandibles were lengthened 6 mm using a custom-made distractor with a rate of 1 mm/d. All animals were killed in 4 weeks after completion of distraction. The distracted calluses were harvested and processed for histology and immunohistochemistry of MMP-3 and TIMP-1. RESULTS: Elevated expression of both MMP-3 and TIMP-1 was found in the distracted calluses resulting from mandibular lengthening. Positive staining for MMP-3 was seen in the osteoblasts and osteocytes, and TIMP-1 was mainly localized in osteoblasts. CONCLUSION: MMP-3 and TIMP-1 appear to play important roles in the remodeling of new bone created by mandibular distraction osteogenesis.[Abstract] [Full Text] [Related] [New Search]