实用医学杂志 ›› 2023, Vol. 39 ›› Issue (18): 2317-2322.doi: 10.3969/j.issn.1006-5725.2023.18.006

• 基础研究 • 上一篇    下一篇

BMI-1抑制剂PTC-596对人乳腺癌MCF-7细胞增殖、周期和凋亡的影响

李玉玲,杨建林(),崔芝,王静,吕亚丰,曹春雨   

  1. 三峡大学基础医学院,肿瘤微环境与免疫治疗湖北省重点实验室 (湖北 宜昌 443002 )
  • 收稿日期:2023-05-18 出版日期:2023-09-25 发布日期:2023-10-10
  • 通讯作者: 杨建林 E-mail:435203858@qq.com
  • 基金资助:
    国家自然科学基金资助项目(81372265);湖北省卫生健康科研基金(WJ2019H532);肿瘤微环境与免疫治疗湖北省重点实验室开放基金项目(2019KZL01)

Effect of BMI-1 inhibitor PTC-596 on proliferation, cell cycle, and apoptosis of human breast cancer MCF-7cells

Yuling LI,Jianlin YANG(),Zhi CUI,Jing WANG,Yafeng LV,Chunyu. CAO   

  1. College of Basic Medical Sciences,China Three Gorges University,Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy,Yichang 443002,China
  • Received:2023-05-18 Online:2023-09-25 Published:2023-10-10
  • Contact: Jianlin YANG E-mail:435203858@qq.com

摘要:

目的 分析BMI-1抑制剂PTC-596对人乳腺癌MCF-7细胞增殖、周期和凋亡的影响。 方法 以人乳腺癌MCF-7细胞为肿瘤细胞模型,正常培养为阴性对照组,25、50 nmol/L PTC-596处理SGC-7901细胞48 h为低、高药物浓度实验组。利用CCK8法分析细胞增殖能力;流式细胞术分别结合PI单染、DCFH-DA探针、JC-1探针以及PI/FITC-Annexin V双染分析细胞周期、活性氧(reactive oxygen species, ROS)累积、线粒体膜电位和凋亡细胞比例;Western blot法检测细胞BIM-1蛋白和周期相关蛋白CyclinD1、CyclinB1、P21以及凋亡相关蛋白Bax、Bcl-2、c-PARP蛋白相对表达水平。 结果 与对照组相比,PTC-596高效抑制人乳腺癌MCF-7细胞的增殖,处理48 h后IC50 为(49.33 ± 7.02)nmol/L。低、高药物浓度实验组细胞中BMI-1表达显著减少(P < 0.01)。实验组细胞中CyclinB1和P21相对表达增加,CyclinD1表达减少,细胞有丝分裂被抑制,出现G2/M期周期阻滞;同时活性氧累积增多,线粒体膜电位下降,Bax表达上调,Bcl-2表达下调,c-PARP增加,凋亡细胞比例从2.04%显著上升为10.56%、26.74%。与对照组相比较,以上结果差异均有统计学意义(P < 0.05)。 结论 PTC-596高效杀伤人乳腺癌MCF-7细胞,其机制可能与抑制BMI-1、诱导细胞周期阻滞和内源性线粒体途径细胞凋亡密切相关。

关键词: 原癌基因BMI-1, PTC-596, 人乳腺癌MCF-7细胞, 细胞增殖, 细胞周期, 凋亡

Abstract:

Objective To investigate the effect of a novel BMI-1 inhibitor PTC-596 on the proliferation, cell cycle, and apoptosis of human breast cancer MCF-7 cells. Methods MCF-7 cells treated with 0 nmol/L PTC-596 were used as control group; MCF-7 cells treated with 25, and 50 nmol/L PTC-596 as experimental group. The CCK8 assay was used to evaluate the celular proliferation ability; DCFH-DA probe/flow cytometry (FCM) was performed to detect the change of cellular reactive oxygen species (ROS). PI single-staining/FCM was used to analyze cell cycle; PI/FITC -Annexin V/FCM to analyze the proportion of apoptotic cells. JC-1/FCM was performed to detect the change of mitochondrial membrane potential(MMP); western blot to analyze the expression of BMI-1, cell cycle related proteion(CyclinD1, CyclinB1, and P21) and apoptosis related proteion (Bax, Bcl-2, and c-PARP). Results PTC-596 could significantly inhibit MCF-7 cell proliferation, with the IC50 value of 49.33 ± 7.02 nmol/L(24 h). BMI-1 expression was significantly decreased in the low- and high- drug concentration experimental group (P < 0.01). The relative expression of CyclinB1 and P21 in the experimental groups were increased (P < 0.01), while the expression of CyclinD1 was decreased (P < 0.01), and cell mitosis was inhibited (P < 0.01), resulting in G2/M cycle arrest (P < 0.01). At the same time, the accumulation of reactive oxygen species was increased (P < 0.01); mitochondrial membrane potential was decreased (P < 0.01). Bax expression was up-regulated (P < 0.01), while Bcl-2 expression was down-regulated (P < 0.01); c-PARP was increased (P < 0.01), and the proportion of apoptotic cells was significantly increased from 2.04% to 10.56% and 26.74% (P < 0.01). Conclusion PTC-596 can effectively inhibit the proliferation of human breast cancer MCF-7cells, and its mechanism may be closely related to the inhibition of BMI-1, the induction of cell cycle arrest, and the endogenous mitochondrial apoptosis.

Key words: B-cell-specificmoloney murine leukemia virus insection site 1, PTC-596S, human breast cancer MCF-7cells, cell proliferation, cell cycle, apoptosis

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