Extracellular matrix mineralization in periodontal tissues: Noncollagenous matrix proteins, enzymes, and relationship to hypophosphatasia and X-linked hypophosphatemia
Periodontology 2000, ISSN: 0906-6713, Vol: 63, Issue: 1, Page: 102-122
2013
- 56Citations
- 96Captures
- 7Mentions
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Metrics Details
- Citations56
- Citation Indexes56
- 56
- CrossRef50
- Captures96
- Readers96
- 96
- Mentions7
- References7
- Wikipedia7
Article Description
As broadly demonstrated for the formation of a functional skeleton, proper mineralization of periodontal alveolar bone and teeth - where calcium phosphate crystals are deposited and grow within an extracellular matrix - is essential for dental function. Mineralization defects in tooth dentin and cementum of the periodontium invariably lead to a weak (soft or brittle) dentition in which teeth become loose and prone to infection and are lost prematurely. Mineralization of the extremities of periodontal ligament fibers (Sharpey's fibers) where they insert into tooth cementum and alveolar bone is also essential for the function of the tooth-suspensory apparatus in occlusion and mastication. Molecular determinants of mineralization in these tissues include mineral ion concentrations (phosphate and calcium), pyrophosphate, small integrin-binding ligand N-linked glycoproteins and matrix vesicles. Amongst the enzymes important in regulating these mineralization determinants, two are discussed at length here, with clinical examples given, namely tissue-nonspecific alkaline phosphatase and phosphate-regulating gene with homologies to endopeptidases on the X chromosome. Inactivating mutations in these enzymes in humans and in mouse models lead to the soft bones and teeth characteristic of hypophosphatasia and X-linked hypophosphatemia, respectively, where the levels of local and systemic circulating mineralization determinants are perturbed. In X-linked hypophosphatemia, in addition to renal phosphate wasting causing low circulating phosphate levels, phosphorylated mineralization-regulating small integrin-binding ligand N-linked glycoproteins, such as matrix extracellular phosphoglycoprotein and osteopontin, and the phosphorylated peptides proteolytically released from them, such as the acidic serine- and aspartate-rich-motif peptide, may accumulate locally to impair mineralization in this disease. © 2013 John Wiley & Sons A/S.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84881513484&origin=inward; http://dx.doi.org/10.1111/prd.12029; http://www.ncbi.nlm.nih.gov/pubmed/23931057; https://onlinelibrary.wiley.com/doi/10.1111/prd.12029; https://dx.doi.org/10.1111/prd.12029; http://onlinelibrary.wiley.com/resolve/doi?DOI=10.1111/prd.12029; https://onlinelibrary.wiley.com/doi/abs/10.1111/prd.12029; https://onlinelibrary.wiley.com/doi/full/10.1111/prd.12029; https://onlinelibrary.wiley.com/doi/pdf/10.1111/prd.12029; http://onlinelibrary.wiley.com/doi/10.1111/prd.12029/abstract; http://www3.interscience.wiley.com/resolve/doi?DOI=10.1111/prd.12029; http://doi.wiley.com/10.1111/prd.12029; http://onlinelibrary.wiley.com/doi/10.1111/prd.12029/abstract?systemMessage=Wiley+Online+Library+will+be+disrupted+9th+Aug+from+10-2+BST+for+essential+maintenance.+Pay+Per+View+will+be+unavailable+from+10-6+BST.
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