九节龙皂苷Ⅰ对胶质瘤U87细胞侵袭和迁移的影响

目的 观察九节龙皂苷Ⅰ(从九节龙全草中萃取)对胶质瘤U87细胞体外侵袭、迁移等生物学行为的影响及作用机制的探讨.方法 体外培养U87细胞,采用四甲基偶氮唑蓝(MTT)实验检测胶质瘤U87细胞经不同浓度九节龙皂苷Ⅰ作用24、48、72 h后增殖率的变化;细胞划痕实验观察九节龙皂苷Ⅰ对U87细胞移动能力的影响;Transwell侵袭转移模型评价九节龙皂苷Ⅰ对U87细胞侵袭能力的影响;明胶酶谱法分析九节龙皂苷Ⅰ对U87细胞分泌基质金属蛋白酶(MMP)活性的影响.结果 MTT法显示一定浓度的九节龙皂苷Ⅰ可抑制U87细胞生长,并随着浓度增加和作用时间延长而明显增加(P＜0.05);与对照组比较,经九节龙皂苷Ⅰ作用后U87细胞迁移和侵袭能力明显降低,MMP-2分泌减少.结论 九节龙皂苷Ⅰ可有效抑制脑胶质瘤U87细胞迁移和侵袭能力,其机制可能与九节龙皂苷Ⅰ降低细胞MMP-2活性相关.     

Inhibitory effect of magnolol on tumour metastasis in mice

It has previously been reported that magnolol, a phenolic compound isolated from Magnolia obovata, inhibited tumour cell invasion in vitro. The purpose of this study was to investigate the antimetastatic effect of magnolol on tumour metastasis in vivo with experimental and spontaneous metastasis models and to clarify the mechanism. The antimetastatic effects of magnolol were evaluated by an experimental liver and spleen metastasis model using L5178Y-ML25 lymphoma, or an experimental and spontaneous lung metastasis model using B16-BL6 melanoma. Intraperitoneal (i.p.) administration of 2 or 10 mg/kg of magnolol significantly suppressed liver and spleen metastasis or lung metastasis. As for the spontaneous lung metastasis model using B16-BL6 melanoma, multiple i.p. administrations of 10 mg/kg of magnolol after and before tumour inoculation significantly suppressed lung metastasis and primary tumour growth. In addition, magnolol significantly inhibited B16-BL6 cell invasion of the reconstituted basement membrane (Matrigel, MG) without affecting cell growth. These data from the in vivo experiments suggest that magnolol possesses strong antimetastatic ability and that it may be a lead compound for drug development. The antimetastatic action of magnolol is considered to be due to its ability to inhibit tumour cell invasion.     

培育颗粒对人绒毛滋养细胞侵袭与增殖的作用

目的观察培育颗粒对人绒毛滋养细胞的侵袭和增殖功能的影响。方法取人妊娠5~10周正常胎盘绒毛,进行滋养细胞培养。正常23~25 d雌性SD大鼠药物灌胃,取药理血清。培养液加20%血清,分组培养48 h后检测指标。用Transwell侵袭实验检测培育颗粒对滋养细胞侵袭功能的影响,MTT法检测培育颗粒对滋养细胞增殖能力的影响,流式细胞术检测培育颗粒对滋养细胞增殖核抗原(PCNA)表达的影响。结果Transwell侵袭实验检测结果表明,培育颗粒血清各剂量组与正常组侵袭细胞数均有差异,中剂量组侵袭细胞数最多。MTT法检测结果表明,培育颗粒血清各剂量组与正常组吸光度均有差异,中剂量组吸光度最高。流式细胞术检测结果表明,培育颗粒血清各剂量组与正常组PCNA阳性率均有差异,中剂量组PCNA阳性率最高。结论培育颗粒可促进人绒毛滋养细胞侵袭与增殖功能,可能与负反馈调节有关。     

4.1N蛋白抑制人卵巢透明细胞癌细胞迁移侵袭及其机制初探

目的:探讨4.1N蛋白对卵巢透明细胞癌细胞迁移和侵袭能力的调控并初步探讨相关分子机制。方法:应用免疫组化法检测4.1N蛋白在卵巢透明细胞癌组织中的表达缺失状况。建立4.1N稳定转染卵巢透明细胞癌ES-2细胞系,通过划痕实验、Transwell迁移和侵袭实验观察细胞迁移侵袭能力的改变。利用qRT-PCR和Western blot法检测紧密连接相关分子(Claudin-4和ZO-1)、上皮-间质转化(EMT)标记物(E-cadherin、Ncadherin和Vimentin)和相关转录因子(Twist、Slug和ZEB-2)及基质金属蛋白酶(MMP-2和MMP-3)表达水平的变化。结果:与卵巢异位的子宫内膜组织相比,卵巢透明细胞癌中4.1N蛋白表达水平显著降低甚至缺失(P0.0001)。过表达4.1N后,ES-2细胞的迁移和侵袭能力显著降低,Claudin-4和ZO-1表达上调,Twist、Slug、ZEB-2、MMP-2和MMP-3表达水平下降。结论:4.1N在卵巢透明细胞癌细胞中可能通过调控紧密连接蛋白、部分上皮-间质转化转录因子和基质金属蛋白酶的表达水平,抑制癌细胞的迁移和侵袭能力,进而参与负性调控卵巢透明细胞癌的演进。     

siRNA干扰LOXL2基因对人胃癌细胞株BGC823侵袭的影响及机制

目的 研究小干扰RNA(siRNA)抑制胃癌细胞中LOXL2的表达情况,并探讨LOXL2基因对人胃癌细胞株BGC823侵袭能力影响及机制.方法 QRTPCR及蛋白印迹(Western blot)技术检测人胃癌细胞株BGC823、正常胃上皮细胞株GES-1中LOXL2表达;合成针对LOXL2的siRNA,并转染胃癌细胞株BGC823;应用Transwell实验检测BGC823细胞侵袭能力;检测转染前后BGC823侵袭相关基因基质金属蛋白酶-2(MMP-2)、基质金属蛋白酶-9(MMP-9)表达变化.结果 LOXL2在BGC823细胞中的表达明显高于胃上皮细胞株(P<0?.01);与未转染和转染阴性对照质粒组相比转染组胃癌细胞BGC823中LOXL2 mRNA和蛋白的表达水平均明显降低(P<0.05),侵袭实验显示LOXL2-siRNA转染组胃癌细胞BGC823穿膜细胞数显著低于阴性对照质粒组和未转染组(P<0.05);转染后BGC823中MMP-2、MMP-9表达均较转染前降低(均P<0.05).结论 抑制胃癌细胞BGC823 LOXL2表达可降低细胞的侵袭能力.     

LINC00941 promoted in vitro progression and glycolysis of laryngocarcinoma by upregulating PKM via activating the PI3K/AKT/mTOR signaling pathway

BackgroundLINC00941 has been proved to be related to various tumors, but its relationship with laryngocarcinoma remains vague.MethodsLINC00941 expression in laryngocarcinoma tumor and laryngocarcinoma cells was determined by real time‐quantitative polymerase chain reaction (RT‐qPCR). Besides, the five‐year survival of laryngocarcinoma patients with different LINC00941 expression was analyzed with Kaplan–Meier survival analysis, and the clinical characteristics of laryngocarcinoma patients were also recorded. After transfection, cell viability, cell proliferation, apoptosis, cell cycle, migration, and invasion were detected by cell counting kit‐8 (CCK‐8), colony formation, flow cytometry, cell scratch, and Transwell assays, respectively. Glycolysis was assessed by the colorimetric method. Expressions of proliferation‐associated proteins, migration‐associated proteins, glycolysis‐associated proteins, and phosphatidylinositol 3‐kinase (PI3K)/AKT/mammalian target of rapamycin (mTOR) signal pathway‐associated proteins were detected by Western blot.ResultsIn laryngocarcinoma tumor tissues and cells, LINC00941 was highly expressed. High expression of LINC00941 decreased the 5‐year survival of laryngocarcinoma patients, and it was positively related to lymph node metastasis and clinical stages. LINC00941 overexpression decreased apoptosis but promoted cell viability, proliferation, cell‐cycle progression, migration, and invasion, and glucose consumption and lactate production in laryngocarcinoma cells. Moreover, LINC00941 overexpression elevated expressions of Ki‐67, PCNA, MMP2, N‐Cadherin, HK2, PFKFB4, and PKM, activated the PI3K/AKT/mTOR signal pathway but reduced E‐Cadherin expression, while LINC00941 silencing had the opposite effects. PKM overexpression reversed the effects of LINC00941 silencing on cellular and glycolytic phenotypes.ConclusionLINC00941 promoted in vitro progression and glycolysis of laryngocarcinoma cells by upregulating PKM via activating the PI3K/AKT/mTOR signaling pathway.     

氨氯地平对人乳腺癌细胞株MDA-MB-231侵袭影响的体外实验

目的 探讨氨氯地平对人乳腺癌高转移细胞株MDA-MB-231体外侵袭的影响及其相关机制.方法 用8.34 μmol/L氨氯地平处理肿瘤细胞,以人工重组基底膜侵袭小室(Transwell)观察氨氯地平对MDA-MB-231细胞侵袭的影响;免疫细胞化学方法检测血管内皮生长因子(vascular endothelial growth factor,VEGF)和基质金属蛋白酶-9(matrix met-allo-proteinaae,MMP-9)的表达.结果 8.34 μmol/L的氨氯地平可显著抑制MDA-MB-231细胞的侵袭能力,侵袭抑制率为36.27%;免疫细胞化学检测结果显示,MMP-9和VEGF蛋白的表达在MDA-MB-231细胞中亦明显降低.结论 氨氯地平对MDA-MB-231细胞体外侵袭具有明显的抑制作用,此作用与降低肿瘤细胞的MMP-9和VEGF的表达有关.     

鸦胆亭上调miR-29a-3p抑制非小细胞肺癌H1299细胞增殖、迁移与侵袭

本研究主要探讨鸦胆亭(bruceantin,BCT)对非小细胞肺癌(non-small cell lung cancer,NSCLC)细胞的增殖、侵袭与迁移的抑制作用及其机制.采用MTT法检测BCT对NSCLC细胞株的细胞毒作用;采用集落形成、划痕和Transwell实验分别检测细胞的增殖、迁移与侵袭能力;Wester...     

miR-217靶向MAPK1抑制胃癌细胞侵袭转移作用研究

目的：研究miR-217靶向MAPK1与胃癌侵袭转移的关系。方法在3个不同分化的胃癌细胞株MKN-28、SGC-7901、BGC-823中通过qRT-PCR技术检测miR-217情况,Western blot检测MAPK1表达,Transwell实验分析miR-217下调MAPK1表达后胃癌细胞侵袭转移能力改变。结果低分化人胃癌细胞株中MAPK1低表达,而miR-217高表达,中、高分化人胃癌细胞株中MAPK1高表达,而miR-217低表达（P＜0.05）;SGC-7901-miR-217mimics细胞株中miR-217表达增高,而MAPK1表达下调（P＜0.05）;而SGC-7901、SGC-7901-miR-Scramble、SGC-7901-miR-217-PM 3个细胞株中miR-217表达水平较低,而MAPK1表达水平较高（P＞0.05）。 SGC-790-miR-217 mimics侵袭细胞计数明显低于其他3组（P＜0.05）,SGC-7901、SGC-7901-miR-Scramble、SGC-7901-miR-217-PM 3组之间侵袭细胞计数无显著性差异（P＞0.05）。结论 miR-217能靶向结合MAPK1,降低其表达水平并抑制胃癌细胞的侵袭和转移。