国际肿瘤学杂志 ›› 2020, Vol. 47 ›› Issue (6): 340-345.doi: 10.3760/cma.j.cn371439-20200103-00032

• 论著 • 上一篇    下一篇

多西他赛诱导的多倍体肿瘤细胞在肿瘤复发中的作用

王丽丽1, 赵松1, 欧阳明玥1, 谢晓冬2, 邢思宁1, 刘硕1, 于卉影1()   

  1. 1北部战区总医院临床基础医学实验室,沈阳 110016
    2北部战区总医院肿瘤科,沈阳 110016
  • 收稿日期:2020-01-03 修回日期:2020-04-07 出版日期:2020-06-08 发布日期:2020-07-22
  • 通讯作者: 于卉影 E-mail:hyingy@sina.com
  • 基金资助:
    辽宁省科学技术计划(2019JH8/10300082)

Role of docetaxel induced polyploid tumor cells in tumor recurrence

Wang Lili1, Zhao Song1, Ouyang Mingyue1, Xie Xiaodong2, Xing Sining1, Liu Shuo1, Yu Huiying1()   

  1. 1Clinical Basic Medicine Laboratory, General Hospital of Northern Theater Command, Shenyang 110016, China
    2Department of Oncology, General Hospital of Northern Theater Command, Shenyang 11016, China
  • Received:2020-01-03 Revised:2020-04-07 Online:2020-06-08 Published:2020-07-22
  • Contact: Yu Huiying E-mail:hyingy@sina.com
  • Supported by:
    Science and Technology Plan of Liaoning Province of China(2019JH8/10300082)

摘要:

目的 研究多西他赛诱导的多倍体肿瘤细胞迁移、上皮间质转化特性及免疫细胞对其杀伤作用,以探讨多倍体肿瘤细胞在肿瘤复发中的潜在作用。方法 使用1 μmol/L多西他赛处理人非小细胞肺癌A549细胞24 h后收集的细胞为Doc 1 d组,撤除药物,细胞继续在新鲜的完全培养基中培养至第3天或第5天后收集的细胞分别为Doc 3 d组和Doc 5 d组,以DMSO处理A549细胞24 h作为对照组。采用免疫荧光染色法检测细胞形态,流式细胞术检测细胞倍性,划痕实验检测细胞迁移能力,Western blotting检测细胞上皮间质转化相关蛋白的表达,乳酸脱氢酶释放法评估细胞因子诱导杀伤(CIK)细胞的杀伤活性。结果 与对照组相比,Doc 1 d组、Doc 3 d组、Doc 5 d组细胞多数发生凋亡,少数存活的细胞体积明显增大,且细胞核呈多核状态。对照组、Doc 1 d组、Doc 3 d组、Doc 5 d组多倍体细胞亚群(DNA含量>4N)比例分别为(1.93±0.55)%、(22.97±2.37)%、(51.30±12.51)%、(67.87±8.31)%,4组间差异具有统计学意义(F=26.521,P<0.001),Doc 1 d组、Doc 3 d组、Doc 5 d组多倍体细胞亚群比例均明显高于对照组,差异均具有统计学意义(均P<0.001),且随着撤药时间的延长,Doc 3 d组、Doc 5 d组多倍体细胞亚群比例明显高于Doc 1 d组,差异均具有统计学意义(P=0.009;P=0.004)。对照组细胞在培养24 h、48 h后,伤口愈合率均达100%;Doc 3 d组在培养24 h、48 h后,伤口愈合率分别为(39.10±2.12)%、(46.13±5.32)%,差异无统计学意义(t=2.126,P=0.051);与对照组24 h、48 h相比,Doc 3 d组细胞迁移能力明显降低,差异均具有统计学意义(t=49.756,P<0.001;t=30.825,P<0.001)。与对照组相比,Doc 1 d组、Doc 3 d组和Doc 5 d组细胞中E-cadherin蛋白表达逐渐下调,Vimentin蛋白表达逐渐上调,Snail蛋白、N-cadherin蛋白表达均未发生明显改变。CIK细胞对对照组、Doc 3 d组、Doc 5 d组细胞的杀伤效率分别为(27.27±1.91)%、(17.87±2.35)%、(9.47±0.51)%,3组间差异具有统计学意义(F=11.294,P<0.001),Doc 3 d组、Doc 5 d组细胞的杀伤效率明显低于对照组,差异均具有统计学意义(P=0.004;P<0.001),Doc 5 d组细胞的杀伤效率明显低于Doc 3 d组,差异具有统计学意义(P=0.003)。结论 多西他赛诱导的多倍体肿瘤细胞迁移能力减弱,但易发生上皮间质转化,且免疫细胞对其杀伤作用降低。

关键词: 癌,非小细胞肺, 多倍体肿瘤细胞, 多西他赛, 上皮间质转化

Abstract:

Objective To study the migration of polyploid tumor cells induced by docetaxel, the characteristics of epithelial-mesenchymal transition, and the killing effect of immune cells on them, in order to explore the potential role of polyploid tumor cells in tumor recurrence. Methods The human non-small cell lung cancer A549 cells were treated with 1 μmol/L docetaxel for 24 h, and the cells were collected as Doc 1 d group. After drug removal, the cells were cultured in fresh and complete medium for 3 or 5 days, then the cells were collected as Doc 3 d group or Doc 5 d group respectively. The A549 cells were treated with DMSO for 24 h as control group. Immunofluorescence staining was used to detect cell morphology, flow cytometry was used to analyze cell ploidy, scratch test was used to detect cell migration, Western blotting was used to detect the expression of epithelial-mesenchymal transition related proteins, and lactate dehydrogenase release method was used to evaluate the killing activity of cytokine-induced killer (CIK) cells. Results Compared with the control group, most of the cells in the Doc 1 d group, Doc 3 d group and Doc 5 d group were apoptotic, a few of the surviving cells were significantly larger, and the nucleus was polynuclear. The proportions of polyploid cell subset (DNA content > 4N) in the control group, Doc 1 d group, Doc 3 d group and Doc 5 d group were (1.93±0.55)%, (22.97±2.37)%, (51.30±12.51)% and (67.87±8.31)% respectively, and the difference among the four groups was statistically significant (F=26.521, P<0.001). The proportion of polyploid cell subset in Doc 1 d group, Doc 3 d group and Doc 5 d group was significantly higher than that in the control group (all P<0.001). With the prolongation of withdrawal time, the proportion of polyploid cell subset in Doc 3 d group and Doc 5 d group was significantly higher than that in Doc 1 d group (P=0.009; P=0.004). After 24 h and 48 h culture, the wound healing rates of the control group were both 100%, and the wound healing rates of the Doc 3 d group were (39.10±2.12)% and (46.13±5.32)% respectively, with no significant difference (t=2.126, P=0.051). Compared with the control group at 24 h and 48 h, the cell migration abilities of Doc 3 d group were significantly lower (t=49.756, P<0.001; t=30.825, P<0.001). Compared with the control group, the expression of E-cadherin protein decreased gradually in the Doc 1 d group, Doc 3 d group and Doc 5 d group, the expression of Vimentin protein increased gradually, and the expressions of Snail protein and N-cadherin protein did not change significantly. The killing efficiencies of CIK cells against the cells of the control group, Doc 3 d group and Doc 5 d group were (27.27±1.91)%, (17.87±2.35)%, (9.47±0.51)% respectively, and the difference was statistically significant (F=11.294, P<0.001). The killing efficiency of Doc 3 d group and Doc 5 d group was significantly lower than that of the control group (P=0.004; P<0.001). The killing efficiency of Doc 5 d group was significantly lower than that of Doc 3 d group (P=0.003). Conclusion The migration ability of polyploid tumor cells induced by docetaxel is weakened, but epithelial-mesenchymal transition is likely to occur, and the killing effect of immune cells on them is reduced.

Key words: Carcinoma,non-small-cell lung, Polyploid tumor cells, Docetaxel, Epithelial-mesenchymal transition