title: [Expression of STAT3 in alveolar bone during orthodontic tooth movement in rats].
abstract: OBJECTIVE
  To study the changes of expression of signal transducer and activator of transcription 3 (STAT3) during orthodontic tooth movement (OTM).
  
  
  METHODS
  Twenty six-week-old SD rats were selected, the upper left first molars were moved by coil spring and lasted for 7 days. The maxillary tissues were obtained at 0, 1, 3, 7 d and subjected to histological study. Statistical analysis was performed using SPSS 16.0 software package.
  
  
  RESULTS
  The main changes in alveolar bone during orthodontic tooth movement included significant increase in osteoblast number and bone formation in the tension area, and bone resorption in the pressure area. The positive cells of osteocalcin in the tension area increased during OTM. The expression of STAT3 increased in the tension area at 3 d and 7 d in comparison with that at 0 d.
  
  
  CONCLUSIONS
  Orthodontic force can stimulate alveolar bone remolding. The expression of STAT3 in the tension area may have effects on alveolar bone remolding during orthodontic tooth movement.
authors.affiliation: Department of Oral and Craniomaxillofacial Science, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; Shanghai Key Laboratory of Stomatology. Shanghai 200011,China. E-mail:13789278@qq.com.
authors.forename: Si-Ru
authors.initials: SR
authors.lastname: Zhou
authors.forename: Qing-Gang
authors.initials: QG
authors.lastname: Dai
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Na-Yong
authors.initials: NY
authors.lastname: Ha
authors.forename: Shu-Liang
authors.initials: SL
authors.lastname: Yang
authors.forename: Ling-Yong
authors.initials: LY
authors.lastname: Jiang
mesh_terms: D000539:Alveolar Process; D000818:Animals; D016723:Bone Remodeling; D001862:Bone Resorption; D008297:Male; D008437:Maxilla / Q000378:metabolism*; D008963:Molar; D010006:Osteoblasts; D015675:Osteocalcin; D010010:Osteoclasts; D010012:Osteogenesis; D051381:Rats; D017207:Rats, Sprague-Dawley; D050796:STAT3 Transcription Factor / Q000235:genetics* / Q000378:metabolism; D013314:Stress, Mechanical; D014087:Tooth Movement Techniques
chemical_list: D050796:STAT3 Transcription Factor; D015675:Osteocalcin