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2018隐丹参酮对乳腺癌MDA―MB―231细胞迁移、侵袭的影响及其机制

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发表于 2018-8-15 13:20:57 | 显示全部楼层 |阅读模式
  [摘要] 目的 探讨隐丹参酮对乳腺癌MDA-MB-231?胞迁移、侵袭的影响及其机制。 方法 用不同浓度的隐丹参酮处理 MDA-MB-231 细胞24 h。采用 MTT、划痕实验和Transwell侵袭实验测定不同浓度隐丹参酮对MDA-MB-231细胞活性、迁移和侵袭的影响。采用Western blot检测MDA-MB-231细胞中c-Src、p-c-Src Tyr416、FAK、p-FAK Tyr576/577、MMP2蛋白表达水平。 结果 与0 μmol/L对照组相比,5 μmol/L、10 μmol/L、20 μmol/L、40 μmol/L隐丹参酮组对 MDA-MB-231 细胞存活率显著降低,且呈剂量依赖(P /6/view-10764248.htm
  [关键词] 隐丹参酮;乳腺癌;MDA-MB-231细胞;迁移;侵袭
  [中图分类号] R273 [文献标识码] A [文章编号] 1673-9701(2017)35-0016-05
  [Abstract] Objective To investigate the effects and molecular mechanism of Cryptotanshinone on migration and invasion of breast cancer MDA-MB-231 cells. Methods MDA-MB-231 cells were treated with different concentrations of Cryptotanshinone for 24 h. The effects of Cryptotanshinone on cell viability, migration and invasion of breast cancer MDA-MB-231 cells were assessed by MTT assay, wound healing assay and Transwell invasion assay. The protein levels of c-Src, p-c-Src Tyr416, FAK, p-FAK Tyr576/577, MMP2 were detected by Western blot. Results The results showed that 5 μmol/L, 10 μmol/L, 20 μmol/L, 40 μmol/L Cryptotanshinone groups significantly reduced the viability ability of MDA-MB-231 cells in a dose-dependent manner, compared with the control group(P    1 材料与方法
  1.1 材料来源
  乳腺癌 MDA-MB-231?胞购自中国科学院上海生命科学研究院细胞库;隐丹参酮购自成都曼思特生物科技有限公司(纯度>98%)(图1)。将隐丹参酮溶于DMSO配制成等20 mmol/L的储备液,分装后于-20℃储存,避光保存;使用时用无血清 RPMI 1640 培养液稀释为5 μmol/L,10 μmol/L,20 μmol/L,40 μmol/L的工作液,DMSO终浓度为 0.1%,对照组为含0.1% DMSO的细胞培养液。胎牛血清和 RPMI 1640 培养基购自Hyclone 公司;兔抗人 c-Src、p-c-SrcTyr416、FAK、p-FAK Tyr576/577、MMP2和 β-actin 抗体和辣根过氧化物酶标记山羊抗兔 IgG购自 Cell Signaling Technology公司;Bradford蛋白浓度测定试剂盒购自美国Bio-Rad公司;Transwell 小室购自Corning公司;Matrigel基质胶购自美国 BD 公司;结晶紫染色液和RIPA裂解液购自碧云天生物技术有限公司。
  1.2 方法
  1.2.1 细胞培养 乳腺癌 MDA-MB-231 细胞在37℃,5% CO2条件下,常规培养于含 10%胎牛血清的 RPMI 1640 培养基。待细胞长满至80%左右单层时,用含0.02% EDTA的0.25%胰蛋白酶溶液进行消化、传代,取生长良好的细胞进行实验。
  1.2.2 MTT法检测细胞活性 取MDA-MB-231细胞,接种于96孔板,每孔加入100 μL细胞悬液,细胞数1×104/孔,每组5个复孔。培养 24 h后,吸弃原培养液,各孔分别加入 200 μL 含有不同浓度隐丹参酮的工作液(0、5 μmol/L、10 μmol/L、20 μmol/L、40 μmol/L),同时设调零孔。继续培养24 h后,利用 MTT 法在波长 490 nm 处检测各组样品吸光度值(A490)。细胞存活率=(实验组A值-对照组A值)/(对照组A值-空白组A值)×100%,对照组定义为 100%。实验重复3次。
  1.2.3 细胞划痕迁移实验 取对数生长期MDA-MB-231细胞,接种于6孔板,1×106/孔,待细胞长满后,更换为不同浓度隐丹参酮的工作液(0、5 μmol/L、10 μmol/L、20 μmol/L)继续培养24 h。然后用20 μL枪头于每孔中间做一划痕,用PBS将未贴壁的细胞洗去,加入2 mL无血清 RPMI 1640 培养液,划痕后24 h,于显微镜下拍照并计数迁移细胞数量,对照组定义为100%。实验重复3次。
  1.2.4 Transwell侵袭实验 取对数生长期MDA-MB-231细胞,接种于6孔板,1×106/孔,待细胞融合至 80%时,更换为不同浓度隐丹参酮的工作液(0、5 μmol/L、10 μmol/L、20 μmol/L)继续培养24 h。预先将基质胶用RPMI1640 培养基以 1:7~1:8 稀释后,每个小室内加入 50 μL,4℃风干过夜,然后小心吸出小室内残余液体,每孔加 50 μL无血清培养液,置于 37℃孵箱内,放置 30 min备用。取密度为 4×105/mL的各组细胞悬液100 μL加入上室内,每组均设复室。在下室中加入600 μL含10%FBS的RPMI 1640培养基,37℃,5%CO2培养箱中孵育24 h。取出Transwell小室,用棉签擦去上室内的细胞和基质胶,用PBS清洗两遍,4%的多聚甲醛固定液固定 30 min,1%结晶紫溶液中染色15 min,PBS 洗涤3次,风干,取下Insert膜,封片后在显微镜高倍镜下,随机选取10个视野,对侵袭至膜背面的细胞总数进行计数并拍照,取均值。对照组定义为 100%。实验重复3次。
  1.2.5 Western blot检测蛋白水平 取对数生长期MDA-MB-231细胞,接种于6孔板,1×106/孔,待细胞融合至80%时,更换为不同浓度隐丹参酮的工作液(0、5 μmol/L、10 μmol/L、20 μmol/L)继续培养24 h,收集细胞,4℃预冷的PBS洗涤3次,加入75 μL细胞裂解液,冰上裂解30 min,提取细胞总蛋白,bradford法测蛋白质浓度。取25 μg蛋白样品,10% SDS-PAGE电泳分离蛋白后转移至 PVDF 膜,用5%BSA/TBST封闭液室温下封闭1 h,洗膜后加入抗 c-Src、p-c-SrcTyr416、FAK、p-FAK Tyr576/577、MMP2和 β-actin-抗(1∶1 000稀释),4°C孵育过夜,TBST 洗膜3次,加入二抗(1∶1 000 稀释)室温下孵育2 h,TBST洗膜3 次,将化学发光增强液A和B等体积混匀涂抹于PVDF膜上,用Bio-Rad凝胶成像系统获取图像。实验重复3次。
  1.3 统计学方法
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  (收稿日期:2017-09-11)
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