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中华细胞与干细胞杂志(电子版) ›› 2021, Vol. 11 ›› Issue (01) : 25 -33. doi: 10.3877/cma.j.issn.2095-1221.2021.01.004

所属专题: 文献

论著

甘草提取物通过调控miR-212-5p/BCL2L2基因抑制甲状腺肿瘤细胞的增殖、迁移和侵袭
王中琴1,(), 胡青1, 张晋锋1   
  1. 1. 448000 荆门,湖北省荆门市中医医院内分泌科
  • 收稿日期:2020-07-20 出版日期:2021-02-01
  • 通信作者: 王中琴

Glycyrrhiza extract inhibits the proliferation, migration and invasion of thyroid tumor cells by regulating the expression of miR-212-5p/BCL2L2 gene

Zhongqin Wang1,(), Qing Hu1, Jinfeng Zhang1   

  1. 1. Department of Endocrinology, Jingmen Traditional Chinese Medicine Hospital, Jingmen 448000, China
  • Received:2020-07-20 Published:2021-02-01
  • Corresponding author: Zhongqin Wang
引用本文:

王中琴, 胡青, 张晋锋. 甘草提取物通过调控miR-212-5p/BCL2L2基因抑制甲状腺肿瘤细胞的增殖、迁移和侵袭[J]. 中华细胞与干细胞杂志(电子版), 2021, 11(01): 25-33.

Zhongqin Wang, Qing Hu, Jinfeng Zhang. Glycyrrhiza extract inhibits the proliferation, migration and invasion of thyroid tumor cells by regulating the expression of miR-212-5p/BCL2L2 gene[J]. Chinese Journal of Cell and Stem Cell(Electronic Edition), 2021, 11(01): 25-33.

目的

探讨甘草提取物GL-1对甲状腺肿瘤细胞增殖、迁移和侵袭的影响及其分子机制。

方法

以10、20、30 μg/mL GL-1处理甲状腺肿瘤细胞CAL-62,或在CAL-62细胞中转染miR-212-5p mimics、anti-miR-212-5p、si-BCL2L2、pcDNA-BCL2L2。其中转染pcDNA-BCL2L2细胞并以30 μg/mL GL-1处理。噻唑蓝比色法(MTT)检测CAL-62细胞增殖,Transwell小室法检测CAL-62细胞迁移和侵袭,实时定量PCR(qPCR)检测CAL-62细胞中miR-212-5p表达,Western blot检测相关蛋白Bcl-2样蛋白2(BCL2L2)、细胞周期蛋白D1(Cyclin D1)和基质金属蛋白酶-2(MMP-2)表达。生物学信息预测miR-212-5p的下游靶基因,双荧光素酶基因报告实验进一步验证。数据采用单因素方差分析、Tukey's事后检验和t检验。

结果

与对照组相比,10、20、30 μg/mL浓度GL-1降低CAL-62细胞24、48、72 h的细胞活性(P < 0.05),并呈剂量、时间依赖性。与对照组相比,10、20、30 μg/mL浓度GL-1干预后,CAL-62细胞侵袭数[(143.56 ± 14.22)个、(100.32 ± 10.23)个、(68.23 ± 6.49)个比(189.65 ± 15.23)个]、迁移数[(198.56 ± 14.35)个、(141.35 ± 12.58)个、(89.56 ± 8.95)个比(295.36 ± 17.56)个]和BCL2L2蛋白表达量(0.76±0.08、0.51±0.06、0.24±0.02比1.00±0.12)均降低(P均< 0.05),而miR-212-5p水平(1.61±0.11、1.99±0.13、2.28±0.15比1.00±0.07)升高(P < 0.05),并呈剂量依赖性。过表达miR-212-5p和沉默BCL2L2表达在24、48、72 h时CAL-62细胞活性、细胞迁移数、侵袭数和Cyclin D1、MMP-2蛋白表达量降低(P < 0.05)。生物学信息预测和双荧光素酶基因报告实验证实BCL2L2是miR-212-5p的靶基因。过表达miR-212-5p抑制BCL2L2蛋白水平,沉默miR-212-5p促进BCL2L2蛋白表达(P < 0.05)。过表达BCL2L2可逆转GL-1对CAL-62细胞增殖、迁移、侵袭及Cyclin D1、MMP-2蛋白表达的抑制作用。

结论

GL-1通过miR-212-5p/BCL2L2抑制甲状腺肿瘤细胞的增殖、迁移和侵袭。

Objective

To investigate the effects and molecular mechanism of Glycyrrhiza extract (GL-1) on the proliferation, migration and invasion of thyroid tumor cells.

Methods

Thyroid tumor cells CAL-62 cells were treated with 10, 20, 30 μg/mL GL-1, or transfected with miR-212- 5p mimics, anti-miR-212-5p, si-BCL2L2, pcDNA-BCL2L2. Among them, cells transfected with pcDNA-BCL2L2 were treated with 30 μg/mL GL-1. The proliferation rate of CAL-62 cells was determined by MTT colorimetry, the migration and invasion rate of CAL-62 cells were detected by Transwell chamber method, the expression of miR-212-5p in CAL-62 cells was detected by real-time quantitative PCR (RT-qPCR) , and the expression levels of related protein BCL2L2, Cyclin D1 and Matrix metalloprotease 2 (MMP-2) were analyzed by Western blot. Biological information predicted the downstream target gene of miR-212-5p, which was further verified by double luciferase gene reporting experiments. The data were compared by one-way analysis of variance, Tukey's post-test and t test, and P < 0.05 was considered statistically significant.

Results

Compared with control group, the cell viability was significantly reduced in a dose-and time-dependent manner after treated by GL-1 at 10 μg/mL、20 μg/mL、30 μg/mL concentrations for 24 h, 48 h and 72 h respectively (P < 0.05) . In addition, compared with control group, after treated with GL-1, the number of invasion cells (143.56±14.22, 100.32±10.23, 68.23±6.49 vs 189.65±15.23, respectively) , migration cells (198.56±14.35, 141.35±12.58, 89.56±8.95 vs 295.36±17.56, respectively) and expression level of BCL2L2 protein (0.76±0.08, 0.51±0.06, 0.24±0.02 vs 1.00±0.12, respectively) were significantly reduced, while the level of miR-212-5p (1.61±0.11, 1.99±0.13, 2.28±0.15 vs 1.00±0.07, respectively) were increased in CAL-62 cells (P < 0.05) , and the data were showed in a dose-dependent manner. The viability CAL-62 cells, migration rate, invasion rate and the expression levels of Cyclin D1, MMP-2 proteins were significantly decreased after overexpression of miR-212- 5p and silencing expression of BCL2L2 at 24 h, 48 h and 72 h (P < 0.05) . Biological information prediction and dual luciferase gene report experiment confirmed BCL2L2 was the target gene of miR-212- 5p. Overexpression of miR-212-5p significantly inhibited the expression level of BCL2L2 protein, however, silencing miR-212-5p significantly increased this protein lever (P < 0.05) . Overexpression of BCL2L2 reversed the inhibitory effect of Glycyrrhiza extract on the proliferation, migration, invasion and expression of Cyclin D1 and MMP-2 in CAL-62 cells.

Conclusion

Glycyrrhiza extract could inhibit the proliferation, migration and invasion of thyroid tumor cells by regulating the expression of miR-212-5p/BCL2L2.

表1 引物序列信息
图1 光学显微镜下观察甘草提取物对甲状腺肿瘤细胞迁移和侵袭的影响(结晶紫染色法,×100)
表2 甘草提取物对甲状腺肿瘤细胞增殖、迁移和侵袭的影响( ± s
图2 甘草提取物对甲状腺肿瘤细胞BCL2L2的影响
表3 甘草提取物对甲状腺肿瘤细胞miR-212-5p及BCL2L2的影响( ± s
图3 光学显微镜下观察转染miR-212-5p抑制甲状腺肿瘤细胞迁移和侵袭(结晶紫染色法,×100)
图4 转染miR-212-5p对甲状腺肿瘤细胞中Cyclin D1、MMP-2蛋白表达的影响
表4 转染miR-212-5p抑制甲状腺肿瘤细胞增殖、迁移和侵袭( ± s
图5 光学显微镜下观察沉默BCL2L2表达抑制甲状腺肿瘤迁移和侵袭(结晶紫染色法,×100)
图6 沉默BCL2L2表达对甲状腺肿瘤细胞中Cyclin D1、MMP-2蛋白表达的影响
表5 沉默BCL2L2表达抑制甲状腺肿瘤增殖、迁移和侵袭( ± s
图7 miR-212-5p靶向BCL2L2抑制BCL2L2蛋白的表达
表6 miR-con或miR-212-5p与报告质粒共转甲状腺肿瘤细胞后双荧光素酶活性检测( ± s
图8 光学显微镜下观察过表达BCL2L2逆转甘草提取物抑制甲状腺肿瘤迁移和侵袭(结晶紫染色法,×100)
图9 过表达BCL2L2逆转甘草提取物对甲状腺肿瘤细胞中Cyclin D1、MMP-2蛋白表达的影响
表7 过表达BCL2L2逆转甘草提取物抑制甲状腺肿瘤增殖、迁移和侵袭( ± s
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