华西口腔医学杂志 ›› 2019, Vol. 37 ›› Issue (6): 577-582.doi: 10.7518/hxkq.2019.06.002

• 基础研究 • 上一篇    下一篇

蛋白激酶D1对口腔鳞癌细胞在肿瘤微环境中生长代谢的调控

王利伟,余宇,陈娇,冯云,崔博淼,李小英,王京楠,陈红利,张平()   

  1. 口腔疾病研究国家重点实验室 国家口腔疾病临床医学研究中心 四川大学华西口腔医院,成都 610041
  • 收稿日期:2019-03-24 修回日期:2019-08-02 出版日期:2019-12-01 发布日期:2019-11-27
  • 通讯作者: 张平 E-mail:964267060@qq.com
  • 作者简介:王利伟,硕士,E-mail:13281122808@163.com
  • 基金资助:
    国家自然科学基金(81372892)

Protein kinase D1 regulates the growth and metabolism of oral squamous carcinoma cells in tumor microenvironment

Wang Liwei,Yu Yu,Chen Jiao,Feng Yun,Cui Bomiao,Li Xiaoying,Wang Jingnan,Chen Hongli,Zhang Ping()   

  1. State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2019-03-24 Revised:2019-08-02 Online:2019-12-01 Published:2019-11-27
  • Contact: Ping Zhang E-mail:964267060@qq.com
  • Supported by:
    The National Natural Science Foundation of China(81372892)

摘要:

目的 探讨在酸性缺氧微环境中,蛋白激酶D1(PKD1)对口腔鳞癌HSC-4细胞生长、代谢的调控作用和相关分子机制。 方法 口腔鳞癌HSC-4细胞稳定转染PKD1,将未转染组、对照组和转染组细胞分别置于酸性或缺氧环境下进行培养,Western blot检测细胞中PKD1敲除率及细胞自噬相关蛋白和糖酵解相关蛋白表达情况,CCK8试剂盒检测细胞增殖。结果 实验成功建立了PKD1基因沉默的稳定细胞株;酸性环境下,PKD1沉默后细胞自噬活性升高;缺氧环境下,相对于对照组,PKD1基因沉默后细胞缺氧诱导因子1α(HIF-1α)和糖酵解中丙酮酸激酶(PKM2)的表达均显著降低;酸性和缺氧环境下,相对于对照组,PKD1基因沉默后细胞的生长速度显著降低。结论 在酸性和缺氧环境下,PKD1基因沉默可促使口腔鳞癌细胞凋亡性自噬活性升高,且下调PKD1基因表达可抑制口腔鳞癌细胞糖酵解,进而抑制肿瘤细胞增殖。揭示PKD1在口腔鳞癌代谢和生长中的作用,使其成为口腔鳞癌治疗的可能靶点。

关键词: 蛋白激酶D1, 口腔鳞癌, 肿瘤微环境, 糖酵解代谢, 细胞增殖

Abstract:

Objective To observe the effect of protein kinase D1 (PKD1) on the growth and metabolism of oral squamous cell carcinoma HSC-4 cells and related molecular mechanisms in the tumor microenvironment.Methods HSC-4 cell lines were transfected with shRNA plasmids. Three groups (Wild, control-shRNA, and PKD1-shRNA) were cultured under acidic or hypoxic environment for a certain time. Western blot was used to detect the expression of autophagy-related and glycolytic-related proteins. The proliferation changes were detected by CCK-8 kits.Results The PKD1-knockdown HSC-4 cell line was established. PKD1 silencing increased autophagy activity. Under hypoxic and acidic conditions, the PKD1-knockdown HSC-4 cells showed lower proliferation than the parental cells. PKD1-knockdown also decreased the expression of hypoxia induciblefactor 1α (HIF-1α) and pyruvate kinase M2 (PKM2).Conclusion Under hypoxic and acidic conditions, PKD1 gene silencing can increase apoptotic autophagy activity. Downregulated PKD1 gene expression can reduce the glycolysis of oral squamous cell carcinoma cells and inhibit tumor cell proliferation. This study revealed the important role of PKD1 in the metabolism and growth of oral squamous cell carcinoma, making it a possible target for the treatment of oral squamous cell carcinoma.

Key words: protein kinase D1, oral squamous cell carcinoma, tumor microenvironment, glycolysis metabolism, cell proliferation

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