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   The roles of angiotensin II in stretched periodontal ligament cells  
   
نویسنده monnouchi s. ,maeda h. ,fujii s. ,tomokiyo a. ,kono k. ,akamine a.
منبع journal of dental research - 2011 - دوره : 90 - شماره : 2 - صفحه:181 -185
چکیده    The loading caused by occlusion and mastication plays an important role in maintaining periodontal ligament (pdl) tissues. we hypothesized that a loading magnitude would be involved in the production of biological factors that function in the maintenance of pdl tissues. here,we identified up-regulated gene expressions of transforming growth factor-î1 (tgf-î1),alkaline phosphatase (alp),and angiotensinogen in human pdl fibroblastic cells (hplfs) that were exposed to 8% stretch loading. immunolocalization of angiotensin i/ii (ang i/ii),which was converted from angiotensinogen,was detected in rat pdl tissues. hplfs that were stimulated by ang ii also increased their gene expressions of tgf-î1 and alp. furthermore,the antagonist for ang ii type 2 receptor,rather than for type 1,significantly inhibited gene expressions induced by the stretch loading. analysis of these data suggests that ang ii mediates the loading signal in stretched hplfs to induce expressions of tgf-î1 and alp. © international & american associations for dental research.
کلیدواژه angiotensin II.; human periodontal ligament fibroblastic cells; stretch
آدرس division of oral rehabilitation,department of endodontology and operative dentistry,kyushu university, Japan, department of endodontology,kyushu university hospital,3-1-1 maidashi,higashi-ku,fukuoka 812-8582, Japan, department of endodontology,kyushu university hospital,3-1-1 maidashi,higashi-ku,fukuoka 812-8582, Japan, division of oral rehabilitation,department of endodontology and operative dentistry,kyushu university, Japan, division of oral rehabilitation,department of endodontology and operative dentistry,kyushu university, Japan, division of oral rehabilitation,department of endodontology and operative dentistry,kyushu university,japan,department of endodontology,kyushu university hospital,3-1-1 maidashi,higashi-ku,fukuoka 812-8582, Japan
 
     
   
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