title: [Expression of ligand-gated cation channels P2X3 receptor in rat pulp during experimental tooth movement].
abstract: OBJECTIVE
  To investigate ligand-gated cation channels P2X3 receptors changes in rat pulp during experimental tooth movement (ETM), and preliminarily find their possible effect during ETM.
  
  
  METHODS
  54 male SD rats (200-250 g) were selected and randomly divided into blank group (5 rats), control group (14 rats) and experimental group (35 rats). The left maxillary first molar was selected as observation object, the pulp tissue biopsies was taken at different time points to carry out immunohistochemical study.
  
  
  RESULTS
  Predominant up regulation of P2X3 receptors immunoactivity was found in pulp from 1/6 d to 7 d after experimental tooth movement. It started to significantly increase at 1/6 d, peaked at 3 d, and then decreased continuously until 7 d as compared with the beginning.
  
  
  CONCLUSIONS
  P2X3 receptors have a rhythm change in rat pulp as a result of ETM, speculated that P2X3 receptors is closely related to the tooth movement injury, but the mechanism of action need further researches.
authors: Dept. of Orthodontics, College of Stomatology, Dalian Medical University, Dalian 116044, China.
authors: Yun
authors: Y
authors: Lu
authors: Zhi
authors: Z
authors: Yang
authors: Xiao-Chuam
authors: XC
authors: Hua
authors: Xin
authors: X
authors: Chang
authors: Lin
authors: L
authors: Gui
authors: Sheng
authors: S
authors: Wang
authors: Wen-Li
authors: WL
authors: Lai