精品文档---下载后可任意编辑PI3kAkt 信号通路在周期性张应力介导的牙周膜成纤维细胞凋亡中的作用的开题报告Title：The Role of PI3kAkt Signaling Pathway in Periodontal Ligament Fibroblast Apoptosis Mediated by Cyclical Tensile Stress Background：Periodontitis is a common disease in dental clinic, which is caused by chronic inflammation of periodontal tissues, leading to the destruction of periodontal supporting tissues and inevitably result in tooth loss. Periodontal ligament fibroblasts (PDLFs) are the main cells in periodontal tissues and play a central role in maintaining the homeostasis of periodontal tissues. Periodontal tissues are under constant mechanical stress from chewing and speaking, which may contribute to the development of periodontitis. However, the underlying mechanism of how mechanical stress affects PDLFs and contributes to periodontitis remains largely unclear.Objectives：To investigate the role of PI3kAkt signaling pathway in cyclical tensile stress-induced PDLF apoptosis, and to determine the potential therapeutic target for periodontitis.Methods：Cyclical tensile stress will be applied to PDLF cells by using a custom-made device for 12 hours. The expression level of PI3kAkt signaling pathway markers, including p-Akt, p-PI3K, Bax, and Bcl-2, will be measured by Western blot and RT-PCR after cells were exposed to cyclical tensile stress. Meanwhile, the apoptosis rate of PDLF will be detected by flow cytometry and TUNEL staining. Additionally, the PDLF will be treated with PI3kAkt signaling pathway inhibitor to explore whether the inhibition of PI3kAkt can attenuate the cyclical tensile stress-induced apoptosis.Expected Results：Our research is expected to reveal the mechanism of cyclical tensile stress on PDLFs apoptosis and to find new therapeutic targets for periodontitis. The results of this study 精品文档---下载后可任意编辑will improve our understanding of periodontitis and provide support for novel therapeutic approaches for the prevention and treatment of periodontitis.
