Abstract:
BACKGROUND:During application of orthodontic force on the tooth, various molecular parameters associated with tissue remodeling are changed. IGF-I is a regulatory protein produced during periodontal regeneration. IGF binding proteins-3 (IGFBP-3), a specific IGF-I binding protein, is the major regulatory factor of IGF-I activity. OBJECTIVES:We tested the hypothesis that changes in the IGF-I/ IGFBP-3 system occur during fixed force application to the tooth and that these changes are detectable in the gingival crevicular fluid (GCF). METHODS:IGFBP-3 and IGF-I secretion into gingival crevicular fluid (GCF) was analyzed by Western blotting and immunoradiometric assay (IRMA), respectively, in GCF of 6 healthy subjects just prior to and during orthodontics treatment using fixed appliances. RESULTS:We observed a significant time-dependent decrease of IGFBP-3 content in GCF during orthodontic treatment (4 h and 10 days). Reduction in levels of intact, glycosylated 47 kDa form of IGFBP-3 was associated with its degradation and the appearance of intermediate breakdown products. IGF-I levels were significantly increased 4 h after application of orthodontic force, while they were significantly reduced 10 days after the start of treatment. CONCLUSIONS:IGFBP-3 secretion into GCF and its molecular structure are modified by the fixed force of orthodontic treatment. Alterations in IGFBP-3 appear to be unrelated to the binding to IGF-I, suggesting an IGF-independent role of this binding protein in tooth movement.
journal_name
J Endocrinol Investjournal_title
Journal of endocrinological investigationauthors
Toia M,Galazzo R,Maioli C,Granata R,Scarlatti Fdoi
10.1007/BF03345340keywords:
subject
Has Abstractpub_date
2005-12-01 00:00:00pages
1009-14issue
11eissn
0391-4097issn
1720-8386pii
2625journal_volume
28pub_type
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journal_title:Journal of endocrinological investigation
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journal_title:Journal of endocrinological investigation
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
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pub_type: 临床试验,杂志文章,随机对照试验
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pub_type: 杂志文章
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