实用医学杂志 ›› 2021, Vol. 37 ›› Issue (24): 3119-3125.doi: 10.3969/j.issn.1006⁃5725.2021.24.005

• 基础研究 • 上一篇    下一篇

桦木酸在缺氧条件下对PC⁃3细胞干性、侵袭、迁移、黏附及HIF⁃1α表达的影响

谢尚延1 黄帅1 王斌2 林卓远3 钟少文1 梁宝霞4   

  1. 广州医科大学附属第二医院1 骨科,2 急诊外科,3 泌尿外科,4 放射科(广州 510260)

  • 出版日期:2021-12-25 发布日期:2021-12-25
  • 通讯作者: 梁宝霞 E⁃mail:liangbaoxia@gzhmu.edu.cn
  • 基金资助:
    国家自然科学基金项目(编号:81872172,21901052);广东省自然科学基金(编号:2019A1515010690,2018A03031086);广州市卫健委基金(编号:20201A011080,20201A011077)

Effects of Betulinic acid on stemness,invasion,migration,adhesion and HIF⁃1α expression in PC⁃3 cells under hypoxia

XIE Shangyan*,HUANG Shuai,WANG Bin,LIN Zhuoyuan,ZHONG Shaowen,LIANG Baoxia.   

  1. Department of Orthopedicsthe Second Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510260 China 

  • Online:2021-12-25 Published:2021-12-25
  • Contact: LIANG Baoxia E⁃mail:liangbaoxia@gzhmu.edu.cn

摘要:

目的 探讨桦木酸(betulinic acid,BA)在缺氧条件下对人前列腺癌骨转移 PC⁃3 细胞干性、 侵袭、迁移、黏附及缺氧诱导因子⁃1α(hypoxia⁃inducible factor⁃1α,HIF⁃1α)表达的影响。方法 采用 CCK⁃8 检测 BA 对前列腺癌骨转移细胞株 PC⁃3 细胞活力半数抑制浓度(IC50),再分为 IC50药物浓度 BA 组和对照 组,检测 BA PC⁃3 细胞增殖的影响;在常氧、缺氧及缺氧+IC50(10 μmol/L)BA 条件下处理 PC⁃3 细胞,采用 Transwell 实验检测 BA 对细胞侵袭、迁移能力的影响;采用细胞黏附实验检测 BA 对细胞黏附能力的影响; 采用肿瘤成球实验检测 BA 对细胞自我更新能力影响;采用 PCR 实验及 Western blot 实验检测 BA 对细胞表 HIF⁃1α、CD31、CD44 的影响;采用酶联免疫吸附试验(ELISA)检测 BA 对细胞 VEGF、IL⁃8、IL⁃1β、IL⁃6 TNF⁃α 因子表达的影响。结果 BA 呈浓度和时间依赖性抑制 PC⁃3 细胞增殖,其 IC50 10 μmol/L。PC⁃3 细胞在缺氧环境中的干性、侵袭、迁移、黏附能力增加,而加入 BA PC⁃3 细胞的干性、侵袭、迁移、黏附 能力下降。Western blot 实验结果显示,BA 能抑制 PC⁃3 细胞中 HIF⁃1α 蛋白表达,同时抑制 CD31、CD44 白表达(P < 0.01);PCR 实验结果显示,BA 下调 HIF⁃1α mRNA 表达,同时也下调 CD31、CD44 mRNA 表达(P < 0.01)。ELISA 试验结果显示 BA 可抑制 VEGF、IL⁃8、IL⁃1β、IL⁃6 TNF⁃α 因子的表达(P < 0.01)。 结论 BA 能抑制缺氧条件下 PC⁃3 细胞的干性、侵袭、迁移及黏附能力,其机制可能与 BA 下调 HIF⁃1α CD31、CD44表达,及抑制VEGF、IL⁃8、IL⁃1β、IL⁃6和TNF⁃α 等因子表达有关

关键词:

桦木酸, 前列腺癌, 缺氧, 缺氧诱导因子?1α, PC?3细胞, 骨转移

Abstract:

Objective To investigate the effects of Betulinic acid(BA)on the stemness,invasion,migra⁃ tion,adhesion and hypoxia inducible factor⁃1α(HIF⁃1α)expression in human prostate cancer bone metastatic PC⁃3 cells under hypoxia. Methods PC⁃3 cells were treated with various concentrations of BA solution,the cell viability was detected by CCK8 and the IC50 value of 50% inhibition concentration was calculated,and then divided into IC50 concentration BA group and control group to detect the effect of betulinic acid on the proliferation of PC⁃3 cells,PC⁃3 cells were treated with normoxic,Hypoxia group and Hypoxia+IC50(10 μmol/L)BA group,and the effects of BA on cell invasion and migration were detected by Transwell assay. The effect of BA on cell adherence was determined using a cell adhesion test,and the ability of PC⁃3 cells to self⁃renew following BA treatment was determined using a tumor spheroidization assay. The effect of BA on the expression of HIF⁃1α,CD31,and CD44 was detected using polymerase chain reaction(PCR)and Western blot immunoblotting,while the effect of BA on the expression of VEGF,IL⁃8,IL⁃1β,IL⁃6,and TNF⁃α factors was detected using an enzyme linked immunosorbent assay(ELISA). Results BA inhibited the proliferation of PC ⁃3 cells in a concentration ⁃and time ⁃dependent manner,and its IC50 was 10 μmol/L. PC⁃3 cells stemness,invasion,migration,adhesion ability were significantly increased under hypoxia. However,after BA treatment,the aforementioned phenomenon was reversed. Western blot analysis revealed that BA could inhibit the expression of HIF ⁃ 1α protein,CD31 and CD44 protein in PC ⁃3 cells(P < 0.01)。The results of PCR assay revealedthat BA could downregulation the mRNA expression of HIF⁃1αand mRNA of CD31 and CD44(P < 0.01). The results of ELISA test showed that BA could inhibit the expression of VEGF,IL⁃8,IL⁃1 β,IL⁃6 and TNF⁃α(P < 0.01). The results of ELISA test showed that BA could inhibit the expression of VEGF,IL⁃8,IL⁃1 β,IL⁃6 and TNF⁃α(P < 0.01). Conclusion Under hypoxia,BA inhibits PC⁃3 cell stemness,invasion,migration,and adhesion. It′s possible that BA inhibits the expression of HIF⁃1α,CD31CD44,and cytokines including VEGF,IL⁃8,IL⁃1β,IL⁃6,and TNF⁃α.

Key words:

betulinic acid, prostate cancer, hypoxia, hypoxia?inducible factor?1α, PC?3 cells, bone metastatic