Cox-2抑制剂NS-398对人胆管癌QBC939细胞增殖侵袭的影响

目的观察选择性Cox-2抑制剂NS-398对人胆管癌细胞株QBC939增殖、侵袭的影响。方法体外培养人胆管癌QBC939细胞,加入不同浓度的NS-398培养后,采用MTT比色法观察不同浓度NS-398作用不同时间对QBC939细胞的增殖抑制情况;采用Transwell小室法检测不同浓度NS-398作用后QBC939细胞的侵袭能力。结果 NS-398对QBC939细胞的增殖有抑制作用,并呈时间及浓度依赖性(P均<0.01),最大抑制浓度为100μmol/L。加入NS-398培养36 h后,随着药物浓度的增加,QBC939细胞体外侵袭能力明显减弱(P<0.01)。结论NS-398可抑制人胆管癌QBC939细胞的增殖,并减弱其体外侵袭能力。     

NS398对人肝门部胆管癌QBC939细胞增殖及前列腺素E2的影响

目的观察选择性环氧合酶-2(cyclooxygenase-2,COX-2)抑制剂NS398对肝门部胆管癌(hilar cholangiocarcinoma,HCC)QBC939细胞增殖的影响;检测经不同浓度NS398作用后HCC细胞培养液中前列腺素E2(prostaglandin E2,PGE2)的含量变化。方法体外培养人HCC QBC939细胞,加入不同浓度的NS398培养后,采用MTT法观察NS398对QBC939细胞增殖的影响;采用ELISA检测NS398作用后QBC939细胞的PGE2含量。结果 NS398对QBC939细胞的增殖有抑制作用,并在0~100μmol/L的浓度范围内呈剂量、时间依赖性(P0.05)。随着NS398浓度及时间的增加,QBC939细胞的PGE2含量明显降低(P0.01)。结论NS398可抑制人胆管癌QBC939细胞的增殖,并显著降低癌细胞中PGE2的含量。     

胃泌素对胆管癌细胞运动及侵袭能力的影响研究

目的探讨胃泌素对胆管癌细胞运动及侵袭能力的影响。方法随机选取我院2014年5月至2016年5月收治的40例胆管癌患者,培育癌细胞株QBC939,检测并比较胆管癌、癌旁及正常胆管黏膜组织中HSP90α蛋白表达阳性率、经不同浓度胃泌素拮抗剂丙谷胺(Proglumide,PGL)处理48 h后胆管癌细胞存活率及HSP90α和其客户蛋白HIFα的表达阳性率。结果胆管癌、癌旁及正常胆管黏膜组织中HSP90α蛋白表达阳性率比较,差异均有统计学意义(P0.05)。经0.05、0.10、0.50、1.00、5.00μmol/L不同浓度PGL处理48 h后,胆管癌细胞存活率显著低于PGL浓度0μmol/L组(P0.05);胆管癌细胞中HSP90α和其客户蛋白HIFα的表达阳性率均显著低于PGL浓度0μmol/L组(P0.05)。结论胃泌素可增强胆管癌细胞的运动及侵袭能力,而PGL能显著抑制胆管癌细胞株的增殖、生长,且PGL浓度越高,细胞存活率越低,凋亡率越高。     

WWOX基因转染对胆管癌细胞增殖、凋亡及侵袭的影响

目的:探讨WWOX基因转染胆管癌细胞株QBC939后对其增殖、凋亡与侵袭性的影响.方法:用脂质体转染法将WWOX重组真核表达质粒转染QBC939细胞,建立稳定表达WWOX基因的细胞株.将其分为以下3组:QBC939组,QBC939/con组和QBC939/WWOX组.荧光定量RT-PCR和Western blot法检测...     

hFXYD6反义核酸对胆管癌细胞体外增殖和侵袭能力的影响

目的:研究hFXYD6基因反义核酸对人胆管癌QBC939细胞体外增殖和侵袭能力的影响.方法:构建hFXYD6基因反义核酸真核表达载体pcDNA3.1(-)/hFXYD6(-)并转染人胆管癌QBC939细胞,同时设pcDNA3.1(-)空载体对照组和空白对照组.SYBR GreenⅠ荧光定量RT- PCR和免疫组化分别检测hFXYD6 mRNA及蛋白表达;MTT、平板克隆形成实验检测细胞体外增殖活性:流式细胞仪检测细胞周期;Transwell侵袭小室模型检测细胞体外侵袭能力.结果:与空白组和空载组比较,反义组细胞hFXYD6 mRNA及蛋白表达量降低;细胞群体倍增时间增加(46.8 h vs 34.5 h,35.3 h),细胞克隆形成率降低(24.3%±5.3% vs 61.0%±8.5%,58.0%±5.6%,P<0.001);细胞周期中G1期细胞比例明显升高(66.4%±2.9% vs 33.5%±2.3%,39.4%±3.7%,P<0.001),S期比例明显减少(18.6%±1.6% vs 36.2%±2.1%,34.1%±1.6%,P<0.001);Transwell侵袭小室中24 h穿膜细胞数无显著改变.空白组和空载组细胞间均无明显差异.结论:hFXYD6反义核酸抑制人胆管癌QBC939细胞体外增殖能力,但对其侵袭能力无明显作用.     

腺病毒介导的p16和顺铂的联合应用对胆管癌细胞系QBC939的生长抑制作用

目的研究p16基因和顺铂联合应用对胆管癌细胞的作用.方法将重组体腺病毒p16(Ad-p16)和顺铂联合作用于人胆管癌细胞QBC939,对p16基因的表达、细胞的生长抑制及机制进行分析.结果用Ad-LacZ进行重组体腺病毒转导效率的检测,发现当MOI为100以上时,重组体腺病毒可使90%以上的培养的人胆管癌QBC939细胞被转导.用RT-PCR方法检测,在胆管癌QBC939细胞系中p16呈低表达.重组体腺病毒能介导外源基因p16在胆管癌QBC939细胞系中高效表达.重组体腺病毒介导的p16在QBC939细胞中表达,能抑制QBC939细胞的生长和集落形成.其与顺铂联合应用对QBC939细胞的生长抑制具有明显作用.并显著地抑制该肿瘤细胞的克隆形成能力.流式细胞计数证实p16能诱导QBC939细胞发生凋亡并导致其发生G1期阻滞,顺铂能诱导QBC939细胞发生凋亡并导致细胞发生明显的G2期阻滞.结论p16基因能够增加QBC939细胞对顺铂的敏感性.     

花姜酮对人肝癌SMMC-7721细胞侵袭及CXCR4表达的影响

目的研究花姜酮对人肝癌SMMC-7721细胞生长侵袭能力的影响及对CXCR4 mRNA和蛋白表达的影响,探讨花姜酮抗肝癌侵袭可能的作用机制。方法分别应用花姜酮10μmol/L、20μmol/L处理人肝癌细胞,采用Transwell小室检测肝癌细胞的侵袭能力,RT-PCR、Western blotting实验检测CXCR4 mRNA及蛋白表达的变化。结果花姜酮处理人肝癌细胞48 h后,对照组细胞透膜数为(56.8±7.8)个/视野,10μmol/L组透膜数为(41.4±4.8)个/视野,20μmol/L组透膜数为(23.2±5.6)个/视野,随花姜酮浓度增加,细胞侵袭人工基底膜的能力显著降低(P<0.05),RT-PCR及Western blotting结果显示CXCR4 mRNA及蛋白表达随花姜酮浓度的增加而降低(P<0.05)。结论花姜酮可能通过降低CXCR4的表达抑制人肝癌SMMC-7721细胞的生长和侵袭能力。     

瘦素对人胆管癌细胞QBC939增殖和凋亡的影响

目的观察瘦素对人胆管癌细胞QBC939增殖和凋亡的影响并初步探讨其可能的机制。方法在培养液中加入不同浓度的瘦素后,用四甲基偶氮唑盐（MTT）法检测细胞增殖,流式细胞仪观察细胞周期及凋亡情况,实时荧光定量PCR法检测增殖相关基因Cyclin D1和凋亡相关基因Bax、Bcl-2的表达情况,同时检测Caspase-3的活性。结果 MTT法显示瘦素可以促进QBC939细胞的增殖;流式细胞仪检测结果显示瘦素能明显降低G0/G1期细胞比例并提高S期细胞比例,细胞凋亡率也有明显降低;实时荧光定量PCR法显示瘦素（50 ng/ml）处理QBC939细胞24 h后,Cyclin D1mRNA的表达明显增高,Bcl-2 mRNA的表达量明显增高,而Bax mRNA的表达量下降,差异有统计学意义;而且瘦素作用QBC939细胞后能降低细胞的Caspase-3酶活性。结论瘦素可以明显的促进人胆管癌细胞QBC939从细胞周期G0/G1期向S期转换,进而促进细胞增殖,此外瘦素还可以抑制其凋亡。     

同型半胱氨酸对巨噬细胞CD147表达的影响及瑞舒伐他汀的干预作用

目的探讨同型半胱氨酸对U-937巨噬细胞CD147表达的影响及瑞舒伐他汀的干预作用。方法在佛波酯诱导分化的人U-937巨噬细胞中加入0、50、100及500μmol/L的同型半胱氨酸孵育48 h;半定量RT-PCR检测CD147 mRNA的表达,Western blot检测巨噬细胞CD147蛋白的表达。不同浓度的瑞舒伐他汀和500μmol/L同型半胱氨酸共同干预U-937巨噬细胞,48 h后半定量RT-PCR及Western blot检测CD147受抑制情况,细胞免疫荧光试验检测CD147表达。结果半定量RT-PCR和Western blot结果显示,随同型半胱氨酸浓度增加,U-937巨噬细胞CD147 mRNA及蛋白的表达逐渐升高,具有剂量依赖性。不同浓度瑞舒伐他汀和500μmol/L同型半胱氨酸共同处理U-937巨噬细胞,随瑞舒伐他汀浓度增加,U-937巨噬细胞CD147 mRNA及蛋白的表达逐渐受抑制,呈一定剂量依赖性。细胞免疫荧光证实同型半胱氨酸促进CD147表达增加,而瑞舒伐他汀能抑制其表达。结论同型半胱氨酸能上调U-937巨噬细胞CD147的表达,瑞舒伐他汀呈浓度依赖性抑制同型半胱氨酸诱导CD147表达。     

姜黄素调控食管癌Eca-109细胞分化、增殖、凋亡的机制

目的探讨姜黄素对食管癌Eca-109细胞的分化、增殖、凋亡及分泌信号蛋白(Wnt)信号通路的影响及机制。方法 MTT法检测8、16、32、64μmol/L的姜黄素作用于食管癌Eca-109细胞24、48、72 h后细胞存活情况,计算细胞凋亡率,原位末端标记法(TUNEL)检测48 h后细胞凋亡情况,RT-PCR检测48 h后细胞中β连环蛋白(β-catenin)、GSK-3β、c-myc的mRNA的表达情况,Western印迹检测48 h后细胞中β-catenin、GSK-3β、c-myc蛋白的表达情况。结果姜黄素对食管癌Eca-109细胞的抑制作用随着作用时间和作用浓度的增加而增加,姜黄素作用24 h IC50为28.1μmol/L,48 h为23.2μmol/L,72 h为15.6μmol/L。TUNEL检测细胞凋亡率随着药物作用浓度的增加而增加。β-catenin、c-myc的转录水平随着药物浓度的增加而减弱。GSK-3β的转录水平随着药物浓度的增加而加强。β-catenin、c-myc蛋白表达量随着药物浓度的增加而减弱。GSK-3β蛋白表达水平随着药物浓度的增加而加强。结论姜黄素可以抑制食管癌Eca-109细胞增殖,促进细胞凋亡。姜黄素可以上调Wnt信号通路中GSK-3β酶的表达、促进β-catenin蛋白降解,从而抑制c-myc基因的转录,抑制癌细胞生长增殖。     

Effect of mutant p27kip1 gene on human cholangiocarcinoma cell line, QBC939

AIM:To investigate the effects of exogenously mutated p27kip1 (p27) on proliferation and apoptosis of human cholangiocarcinoma cell line,QBC939 in vivo.METHODS:Adenviral vectors were used to transfect mutated p27 cDNA into human QBC939 cell line.Expression of p27 was detected by RT-PCR.Western blot.Cell growth,morphological change,cell cycle,apoptosis and cloning formation were determined by MTT assay and flow cytometry.RESULTS:The expression of p27 protein and mRNA was increased significantly in QBC939 cell line transfected with Ad-p27mt.The transfer of Adp27mt could significantly inhibit the growth of QBC939cells,decrease the cloning formation rate and induce apoptosis,p27 over expression caused cell cycle arrest at G0/G1 phase 72 h after infection with Adp27mt.CONCLUSION:p27 may cause cell cycle arrest at G0/G1 phase and subsequently lead to apoptosis.Recombinant adenovirus expressing mutant p27 may be potentially useful in gene therapy for cholangiocarcinoma.     

Survivin expression induced by doxorubicin in cholangiocarcinoma

AIM:To study the role of survivin expression induced bychemotherapy agent (doxorubicin) in the development andanti-chemotherapy of cholangiocarcinoma.METHODS:Expression of survivin was detected by SPimmunohistochemical technique in 33 cases ofcholangiocarcinoma,28 cases of adjacent noncancerous bileduct,and 5 cases of benign bile duct lesions.Lowconcentration of doxorubicin (0.05 mg/l) was added incultured cholangiocarcinoma cell line (QBC939).Theexpression of survivin was detected by RT-PCR and Westernblot at 24 h and 48 h after adding doxorubicin.RESULTS:Survivin was expressed in 24 of 33 cholangiocar-cinoma cases (72.7%).In contrast,no expression of survivinin adjacent noncancerous and benign bile duct lesions wasobserved (P<0.01).No correlation was found betweensurvivin expression and clinical features.Doxorubicin couldmarkedly (P<0.001) up-regulate survivin mRNA and proteinexpression of QBC939 cells.CONCLUSION:Overexpression of survivin in cholangiocar-cinomas may play an important role in the development ofcholangiocarcinoma,its relationship with prognosis ofcholangiocarcinoma deserves further investigation.Higherexpression of survivin is induced by doxorubicin in QBC939.Survivin expression may resist apoptosis induced bychemotherapy agents.     

Survivin expression induced by doxorubicin in cholangiocarcinoma

AIM: To study the role of survivin expression induced by chemotherapy agent (doxorubicin) in the development and anti-chemotherapy of cholangiocarcinoma. METHODS: Expression of survivin was detected by SP immunohistochemical technique in 33 cases of cholangiocarcinoma, 28 cases of adjacent noncancerous bile duct, and 5 cases of benign bile duct lesions. Low concentration of doxorubicin (0.05 mg/l) was added in cultured cholangiocarcinoma cell line (QBC939). The expression of survivin was detected by RT-PCR and Western blot at 24 h and 48 h after adding doxorubicin. RESULTS: Survivin was expressed in 24 of 33 cholangiocarcinoma cases (72.7%). In contrast, no expression of survivin in adjacent noncancerous and benign bile duct lesions was observed (P<0.01). No correlation was found between survivin expression and clinical features. Doxorubicin could markedly (P<0.001) up-regulate survivin mRNA and protein expression of QBC939 cells. CONCLUSION: Overexpression of survivin in cholangiocarcinomas may play an important role in the development of cholangiocarcinoma, its relationship with prognosis of cholangiocarcinoma deserves further investigation. Higher expression of survivin is induced by doxorubicin in QBC939. Survivin expression may resist apoptosis induced by chemotherapy agents.     

Effect of mutant p27(kipl) gene on human cholangiocarcinoma cell line, QBC(939)

AIM：To investigate the effects of exogenously mutated p27^kip1 （p27） on proliferation and apoptosis of human cholangiocarcinoma cell line, QBC939 in vivo.METHODS： Adenviral vectors were used to transfect mutated p27 cDNA into human QBC939 cell line. Expression of p27 was detected by RT-PCR. Western blot. Cell growth, morphological change, cell cycle, apoptosis and cloning formation were determined by MTT assay and flow cytometry.RESULTS： The expression of p27 protein and mRNA was increased signifi cantly in QBC939 cell line transfected with Ad-p27mt. The transfer of Ad-p27mt could signifi cantly inhibit the growth of QBC939 cells, decrease the cloning formation rate and induce apoptosis. p27 over expression caused cell cycle arrest at G0/G1 phase 72 h after infection with Ad-p27mt.CONCLUSION： p27 may cause cell cycle arrest at G0/G1 phase and subsequently lead to apoptosis. Recombinant adenovirus expressing mutant p27 may be potentially useful in gene therapy for cholangiocarcinoma.     

Survivin对人胆管癌细胞凋亡相关信号通路的作用机制

目的:探讨Survivin基因对人胆管癌细胞凋亡信号通路的调节机制.方法:构建针对Survivin基因的siRNA和对照siRNA,分别转染QBC939人胆管癌细胞,Western blot检测siRNA对细胞Survivin的干扰效果.继而分别用流式细胞仪,激酶活性测定和Westernblot检测不同Survivin表达状态下,QBC939细胞的凋亡状态,caspase-3的活性和caspase-3,caspase-9及procaspase-9凋亡信号分子的表达.结果:siRNA-Survivin显著抑制Survivin在QBC939细胞的表达(P<0.05).Survivin表达抑制后,QBC939细胞凋亡明显增加(18.9%±2.3%,P<0.05),caspase-3活性显著升高(0.83±0.15,P<0.01),caspase-3和caspase-9表达明显上调(P<0.05),而procaspase-9表达降低(P<0.05).未转染和转染对照siRNA的QBC939细胞上述变化无显著性差异(P>0.05).结论:Survivin基因通过促进procaspase-9的活化以阻止caspase-3和caspase-9的激活从而抑制胆管癌细胞的凋亡.