Tumor Necrosis Factor-alpha Attenuates the Osteogenic Differentiation Capacity of Periodontal Ligament Stem Cells by Activating Protein Kinase Like Endoplasmic Reticulum Kinase Signaling

1 Tumor Necrosis Factor-alpha Attenuates the Osteogenic Differentiation Capacity of Periodontal Ligament Stem Cells by Activating Protein Kinase Like Endoplasmic Reticulum Kinase Signaling Jun Tan, Lihua Zhou, Peng Xue, Ying An, Lankun Luo, Rong Zhang, Guangsheng Wu, Ying Wang, Hong Zhu, and Qintao Wang State Key Laboratory of Military Stomatology, Department of Periodontology, School of Stomatology, The Fourth Military Medical University; Shaanxi Key Laboratory of Stomatology, Xi'an, Shaanxi, P.R.China.