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溶血磷脂酸(LPA)对肝癌细胞的影响及相关机制的初步探讨

赵燕颖 韩振琦 邹艳平 李云鹏 徐涛 刘丽艳 程海涛

引用本文:
Citation:

溶血磷脂酸(LPA)对肝癌细胞的影响及相关机制的初步探讨

DOI: 10.3969/j.issn.1001-5256.2023.11.016
基金项目: 

吉林省卫健委课题 (2021LC093)

伦理学声明:本研究方案于2021年经由吉林省一汽总医院伦理委员会审批,批号:SB-2021-014。
利益冲突声明:本文不存在任何利益冲突。
作者贡献声明:赵燕颖负责撰写文章;邹艳平、李云鹏、徐涛、刘丽艳参与了实验数据的整理和数据统计分析;程海涛指导文章撰写过程;韩振琦负责拟定写作思路,指导撰写文章并最后定稿。
详细信息
    通信作者:

    程海涛, yychenghaitao@foxmail.com (ORCID: 0009-0004-2693-0449)

Effect of lysophosphatidic acid on hepatoma cells and related mechanism

Research funding: 

Project of Jilin Provincial Health and Health Commission (2021LC093)

More Information
  • 摘要:   目的  探讨溶血磷脂酸(LPA)在肝癌患者中的表达情况和对肝癌恶性生物学行为的影响和调控机制。  方法  收集2016年1月—2022年12月吉林省一汽总医院收治的26例肝癌患者,28例肝硬化患者以及28例体检人群作为对照。用ELISIA方法检测伴有腹腔积液的肝癌和肝硬化患者血浆及腹腔积液中LPA含量,同时检测正常人群血浆中LPA含量,明确LPA在肝癌和肝硬化患者等不同人群中的表达差异。MTT细胞增殖实验和细胞迁移实验检测LPA和其抑制剂-百日咳毒素(PTX)对SMMC7721细胞增殖、迁移和侵袭能力的影响。为探讨LPA和其受体结合后对RhoA及其上下游的FAK、P53表达的影响,本研究采用qPCR和Western Blot法检测LPA对SMMC7721细胞P53、FAK、RhoA的mRNA和蛋白表达水平的影响。计量资料多组间样本均数比较采用单因素方差分析,两两比较采用SNK-q检验。  结果  肝癌患者血浆LPA浓度(4.99±0.55)μmol/L和腹腔积液中LPA浓度(5.19±0.63)μmol/L明显高于肝硬化患者(2.63±0.43)μmol/L、(2.91±0.46)μmol/L,肝癌患者血浆LPA亦明显高于正常人群(1.61±0.39)μmol/L,差异均有统计学意义(P值均<0.05)。细胞增殖试验显示LPA可明显促进SMMC7721细胞增殖,细胞增殖率随剂量和时间增加而增加,尤其中高剂量组增殖率明显高于对照组,差异具有统计学意义(P<0.05)。而PTX抑制其增殖能力,且具有时间依赖性,各组差异具有统计学意义(P<0.05)。72 h高剂量LPA的增殖率是对照组的3.6倍,PTX组是对照组的0.6倍,二者联合组是对照组的1.2倍。另外,LPA可增加肝癌细胞的迁袭能力,而PTX可抑制其迁移,随时间增加上述能力增加,各组差异具有统计学意义(P<0.05)。72 h高剂量LPA的迁袭率是对照组的3.09倍,PTX组是对照组的0.4倍,二者联合组是对照组的0.99倍。qPCR和Western Blot结果显示LPA处理后的SMMC7721细胞P53的mRNA和蛋白表达水平明显减少,而FAK、RhoA的mRNA和蛋白表达水平明显增加,LPA和对照组间比差异具有统计学意义(P<0.05)。  结论  在肝癌患者中LPA表达异常增高,LPA可促进肝细胞癌的增殖并增加细胞迁袭能力。同时LPA改变了P53、FAK和RhoA的表达水平,这可能与LPA促进肿瘤发生发展有关。

     

  • 图  1  各组SMMC7721细胞增殖情况

    注: 与对照组比较,*P<0.05,**P<0.01。

    Figure  1.  The proliferation of SMMC7721 cells in each group

    图  2  各组SMMC7721细胞侵袭、迁移和黏附能力

    注: 与对照组比较,*P<0.05,**P<0.01。

    Figure  2.  Adhesion ability of SMMC7721 cells in each group

    图  3  各组SMMC7721细胞P53、FAK、RhoA基因表达情况

    注: 与对照组比较,*P<0.05。

    Figure  3.  Expression of P53, FAK and RhoA genes in SMMC7721 cells

    图  4  各组SMMC7721细胞P53、FAK、RhoA蛋白表达情况

    注: a,各组P53、FAK、RhoA蛋白表达的Western Blot结果;b,各组P53、FAK、RhoA蛋白表达对比情况。与对照组比较,*P<0.05。

    Figure  4.  Expression of P53, FAK and RhoA in SMMC7721 cells

    表  1  肝癌、肝硬化患者以及正常人群LPA的表达水平

    Table  1.   Expression level of LPA in patients with liver cancer, liver cirrhosis and normal people

    组别 LPA水平(μmol/L)
    对照组 1.61±0.39
    肝癌组血浆 4.99±0.551)
    肝硬化组血浆 2.63±0.43
    肝癌组腹腔积液 5.19±0.631)
    肝硬化组腹腔积液 2.91±0.46
    注:1)与对照组比较,P<0.05。
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  • 收稿日期:  2023-02-09
  • 录用日期:  2023-04-13
  • 出版日期:  2023-11-28
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