Expression of ligand-gated cation channels P2X3 receptor in rat pulp during experimental tooth movement

doi:10.3969/j.issn.1000-1182.2011.02.021

West China Journal of Stomatology

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Expression of ligand-gated cation channels P2X3 receptor in rat pulp during experimental tooth movement

LU Yun1，2, YANG Zhi3, HUA Xiao-chuan4, CHANG Xin1, GUI Lin1, WANG Sheng2, LAI Wen-li2

1. Dept. of Orthodontics, College of Stomatology, Dalian Medical University, Dalian 116044, China; 2. Dept. of Orthodontics, West China College of Stomatology, Sichuan University, Chengdu 610041, China; 3. Joint Orthodontics-Orthognathic Surgery Center, The Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; 4. Dept. of Orthodontics, The Second People’s Hospital of Yunnan Province, Kunming 650021, China

Received:2011-04-25 Revised:2011-04-25 Online:2011-04-20 Published:2011-04-20
Contact: LAI Wen-li，Tel: 028-85501442

Abstract

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. Conclusion 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.

Key words: experimental tooth movement, pulp, pain, P2X3 receptor

LU Yun1，2, YANG Zhi3, HUA Xiao-chuan4, CHANG Xin1, GUI Lin1, WANG Sheng2, LAI Wen-li2. Expression of ligand-gated cation channels P2X3 receptor in rat pulp during experimental tooth movement[J]. West China Journal of Stomatology, doi: 10.3969/j.issn.1000-1182.2011.02.021.

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Expression of ligand-gated cation channels P2X3 receptor in rat pulp during experimental tooth movement

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