Abstract:
:Several studies have shown that surgical detachment of marginal gingiva close to the cervical cementum of molar teeth in a rat mandible is a distinct stimulus for alveolar bone resorption. Recently, we found that P2X4, an ATP-receptor, is significantly up-regulated in marginal gingival cells soon after surgery. We hypothesized that local release of ATP signaling through P2X4 elicits activation of osteoclasts on the alveolar bone surface. In this study, we identified intense immunoreactivity of gingival fibroblasts to P2X4-specific antibodies and a 6.4-fold increase in expression by real-time RT-PCR. Moreover, a single local application, at the time of surgery, of Apyrase (which degrades ATP) or Coomassie Brilliant Blue (an antagonist of purinoreceptors) significantly reduced alveolar bone loss. We propose that ATP flowing from cells after surgery can directly activate P2X4 receptors in the sensor cells of marginal gingiva through Ca(2+) signaling, or by direct activation of osteoclasts on the bone surface.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Binderman I,Bahar H,Jacob-Hirsch J,Zeligson S,Amariglio N,Rechavi G,Shoham S,Yaffe Adoi
10.1177/154405910708600214subject
Has Abstractpub_date
2007-02-01 00:00:00pages
181-5issue
2eissn
0022-0345issn
1544-0591pii
86/2/181journal_volume
86pub_type
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