miR-30a对卵巢癌细胞PTEN/PI3K/AKT/mTOR自噬通路及顺铂耐药性的影响

目的:探究miR-30a对人卵巢癌SKOV3细胞自噬及顺铂耐药性的影响,并初步研究其作用机制。方法:体外培养人卵巢癌SKOV3细胞和人卵巢癌细胞（耐药）细胞（SKOV3/DDP）;将SKOV3/DDP细胞随机分为对照组、miR-30a 阴性对照（NC）组和miR-30a模拟（mimics）组,SKOV3细胞作为正常组。实时荧光定量PCR（RT-qPCR）法检测各组细胞miR-30a表达情况;CCK-8法检测各组细胞顺铂耐药性;Annexin V-FITC/PI法检测各组细胞凋亡情况;蛋白印迹分析法检测各组细胞微管相关蛋白轻链3 I/II（LC3I/II）、p62、磷酸酶和张力蛋白同源物（PTEN）、磷酸化磷脂酰肌醇-3-激酶（p-PI3K）、磷酸化丝氨酸/苏氨酸蛋白激酶B（p-AKT）、磷酸化哺乳动物雷帕霉素靶蛋白（p-mTOR）表达情况;双荧光素酶报告基因检测系统验证miR-30a与PTEN的靶向关系。结果:与对照组和miR-30a NC组相比,miR-30a mimics组SKOV3/DDP细胞miR-30a表达水平、凋亡率、p62、p-PI3K、p-AKT及p-mTOR水平显著升高（P＜0.05）,IC50值、LC3II、PTEN蛋白表达水平及LC3II/LC3I比值显著降低（P＜0.05）;与正常组相比,对照组SKOV3/DDP细胞上述各指标变化趋势完全相反;mirbase数据库预测显示,miR-30a与PTEN mRNA 3' UTR区有结合位点,与PTEN-3' UTR-WT+miR-30a NC组比较,PTEN-3' UTR-WT+miR-30a inhibitor组荧光素酶活性降低（P＜0.05）。结论:miR-30a可能通过靶向抑制PTEN表达,激活PI3K/AKT/mTOR信号通路调控人卵巢癌细胞自噬,降低卵巢癌细胞的顺铂耐药性。     

Gankyrin基因沉默对人卵巢癌SKOV3/CDDP细胞顺铂耐药性的逆转作用和机制

背景与目的：卵巢癌是常见的妇科肿瘤,抗肿瘤药耐药性的产生是卵巢癌治疗失败的主要原因之一,Gankyrin基因被认为与肿瘤耐药性密切相关,本文探讨了Gankyrin基因沉默对卵巢癌耐顺铂细胞系SKOV3/DDP顺铂耐药性的逆转作用及机制。方法：应用real-time PCR技术考察Gankyrin在SKOV3和SKOV3/DDP细胞中的表达,应用MTS法检测Gankyrin对SKOV3/DDP细胞顺铂耐受性的影响,应用流式细胞术检测肿瘤细胞凋亡和细胞内罗丹明-123(Rhodamine-123,Rh-123)含量的变化,Western blot和real-time PCR技术检测肿瘤细胞耐药相关蛋白MDR1、Caspase-3/8、Survivin和Bcl-2蛋白表达,Western blot法检测p53、NF-κB和PTEN蛋白表达和AKT磷酸化水平。结果：Gankyrin在SKOV3/DDP细胞中表达升高,沉默Gankyrin基因后可增加SKOV3/DDP细胞对顺铂的敏感性。基因沉默前后耐药逆转倍数(resistant factor,RF)为1.81和2.45,肿瘤细胞中Rh-123含量提高了1.73和2.42倍,细胞凋亡率是对照组的2.23倍和4.23倍,耐药相关蛋白MDR1、Survivin和Bcl-2蛋白水平显著下降,MDR1 mRNA表达是对照组的62.8%和21.6%,Survivin mRNA表达是对照组的24.5%和10.3%,Bcl-2 mRNA表达是对照组的47.5%和18.4%,Caspase-3/8、p53和PTEN表达水平上升,AKT磷酸化和NF-κB水平下降。结论：沉默Gankyrin基因可逆转SKOV3/DDP对顺铂的耐药性,可能与抑制药物外排,促进细胞凋亡有关,PTEN/AKT/NF-κB/p53信号通路可能是其中心环节。     

Bridge linkage role played by CD98hc of anti-tumor drug resistance and cancer metastasis on cisplatin-resistant ovarian cancer cells

Anti-tumor drug resistance and cancer metastasis are always clinically coincidental, which are conducted by different molecules such as P-glycoprotein (P-gp) and CD147, respectively. P-gp and CD147/CD98hc complex are both found highly expressed on cisplatin resistant ovarian cancer cell line SKOV3/DDP but only slightly expressed on its parent cell SKOV3. RNAi targeting CD98hc or CD147 both reduce their own and P-gp expression as well as cisplatin IC50 of drug-resistant tumor cells. CD147 interference only reduced membrane CD98hc rather than its intracellular forms. Stop of CD98hc also diminished CD147 translation. Cloned potential CD98hc promoter region showed promoter activity in luciferase assay under cisplatin pressure. Intracellular cisplatin accumulation was found increased in RNAi groups and the efflux ability of cisplatin resistant SKOV3 cells was disrupted as well. CD147 has been reported to play an important role in tumor metastasis. Taken together, CD98hc was for the first time revealed to be a bridge between MDR phenotype and tumor metastasis.     

MicroRNA expression profiling in human ovarian cancer: miR-214 induces cell survival and cisplatin resistance by targeting PTEN

MicroRNAs (miRNA) represent a novel class of genes that function as negative regulators of gene expression. Recently, miRNAs have been implicated in several cancers. However, aberrant miRNA expression and its clinicopathologic significance in human ovarian cancer have not been well documented. Here, we show that several miRNAs are altered in human ovarian cancer, with the most significantly deregulated miRNAs being miR-214, miR-199a*, miR-200a, miR-100, miR-125b, and let-7 cluster. Further, we show the frequent deregulation of miR-214, miR-199a*, miR-200a, and miR-100 in ovarian cancers. Significantly, miR-214 induces cell survival and cisplatin resistance through targeting the 3'-untranslated region (UTR) of the PTEN, which leads to down-regulation of PTEN protein and activation of Akt pathway. Inhibition of Akt using Akt inhibitor, API-2/triciribine, or introduction of PTEN cDNA lacking 3'-UTR largely abrogates miR-214-induced cell survival. These findings indicate that deregulation of miRNAs is a recurrent event in human ovarian cancer and that miR-214 induces cell survival and cisplatin resistance primarily through targeting the PTEN/Akt pathway.     

miR-581调控FOXO1对卵巢癌SKOV3细胞自噬的影响

目的 探讨miR-581对卵巢癌SKOV3细胞自噬的影响及作用机制。方法 将miR-581 mimics和miR-581 NC转染到卵巢癌SKOV3细胞中,实时荧光定量PCR法（qRT-PCR）检测转染效率;转染成功后,Western blot检测转染后卵巢癌SKOV3细胞中自噬相关蛋白的表达水平;TargetScanHuman数据库预测miR-581靶基因,Western blot验证miR-581与靶基因的作用。结果 过表达miR-581后可显著抑制自噬相关蛋白LC3Ⅱ和Beclin1的表达（P<0.01）;miR-581可负向调控FOXO1的表达（P<0.01）;FOXO1促进卵巢癌SKOV3细胞自噬（P<0.05）。结论 miR-581通过调控FOXO1的表达影响卵巢癌SKOV3细胞自噬。     

Exosomal transfer of miR-429 confers chemoresistance in epithelial ovarian cancer

The development of multidrug resistance during chemotherapy is the main obstacle for epithelial ovarian cancer (EOC) treatment. Exosomal transfer of carcinogenic microRNAs (miRNAs) might strengthen chemoresistance in recipient cells. Here, we identified through microarray analysis higher miR-429 expression in multidrug-resistant SKOV3 cells and their secreted exosomes (SKOV3-EXO) than in sensitive A2780 cells and their secreted exosomes. SKOV3-derived exosomes were internalized by A2780 cells, which permitted the transfer of miR-429. Exosomal miR-429 enhanced the proliferation and drug resistance of A2780 cells by targeting calcium-sensing receptor (CASR)/STAT3 pathway in vitro and in vivo. In addition, NF-κB-p65 was predicted to bind to the miR-429 promoter region, and the inhibition of NF-κB reduced the expression of miR-429 and led to the sensitivity of EOC cells. Consistently, A2780 cells co-incubated with SKOV3 pretreated with an NF-κB inhibitor or miR-429 antagomir showed sensitivity to cisplatin and exhibited attenuated cell proliferation. Based on our data, exosomal miR-429 functions as a primary regulator of the chemoresistance and malignant phenotypes of EOC by targeting CASR through a mechanism promoted by NF-κB and might be a therapeutic target for EOC.     

Murine double minute 2 siRNA and wild-type p53 gene therapy enhances sensitivity of the SKOV3/DDP ovarian cancer cell line to cisplatin chemotherapy in vitro and in vivo

SKOV3/DDP cells urgently require an efficient therapy to improve drug resistance. Here we show a critical role for cisplatin combined with gene therapy, using transfection of a p53 gene/MDM2-siRNA plasmid, in improving cisplatin sensitivity of SKOV3/DDP cells with a strong inhibition of tumor cell growth in vitro and in vivo. The effects may be associated with enhancement of intracellular platinum accumulation via decreased MDR1/P-gp and improvement of apoptotic resistance via increased P53, PUMA and NOXA expression. The combined therapy may efficiently inhibit cell invasion and migration via deceased HIF-1, VEGF, MMP-9 and MMP-2 to suppress malignant progression. These results indicate that cisplatin chemotherapy combined with targeting the MDM2/p53 axis is an attractive strategy to treat SKOV3/DDP cancer.     

柚皮苷逆转人卵巢癌耐药SKOV3／DDP细胞耐药性及逆转机制的研究

目的 研究柚皮苷对卵巢癌顺铂（DDP）耐药细胞SKOV3／DDP体外增殖的影响及耐药逆转作用,并初步探讨相关耐药机制。方法采用MTT法测定DDP对SKOV3和SKOV3／DDP细胞的半数抑制浓度（IC₅₀）,柚皮苷对SKOV3／DDP细胞的增殖抑制作用及柚皮苷联合DDP对SKOV3／DDP细胞的增殖抑制作用。筛选出非细胞毒性的柚皮苷浓度,将实验细胞分为空白对照组、2.5 μg／ml DDP组、10 μmol/L柚皮苷组、10 μmol/L柚皮苷联合2.5 μg／ml DDP组,分别采用RT-PCR和Western blotting测定各组作用48 h后耐药基因MDR1 mRNA及MRP2 mRNA的表达及其相应的表达产物P-gp、MRP2蛋白的表达水平。结果1～32 μg／ml DDP处理SKOV3及SKOV3／DDP细胞48 h后,SKOV3细胞的IC₅₀为5.48 μg／ml,SKOV3／DDP细胞为14.93 μg／ml,耐药指数为2.72。柚皮苷对SKOV3／DDP细胞有明显的增殖抑制作用,且呈剂量和时间依赖性。选取10 μmol／L柚皮苷作为逆转耐药实验浓度,10 μmol／L柚皮苷联合DDP作用48 h后,SKOV3／DDP细胞对DDP的耐药指数为1.62,逆转倍数为1.68。RT-PCR及Western blotting检测显示,柚皮苷联合DDP组与DDP单药组比较,MDR1 mRNA、MRP2 mRNA表达及P-gp、MRP2蛋白表达均明显下降,差异有统计学意义（P＜0.05）。结论柚皮苷对卵巢癌SKOV3／DDP细胞的体外增殖具有明显抑制作用,并能逆转SKOV3／DDP细胞的耐药性,其逆转耐药的机制可能与下调耐药基因MDR1 mRNA及MRP2 mRNA及相应的P-pg、MRP2蛋白的表达有关。     

MicroRNA-130a调节胃癌细胞SCG7901/DDP的耐药机制研究

目的:探讨microRNA-130a（miR-130a）在胃癌耐药细胞中的表达,并对进一步作用的机制进行研究。方法:采用体外转染法将miR-130a模拟物或抑制剂分别瞬时转染到SCG7901和SCG7901/DDP细胞后,应用Real-time PCR检测转染前后细胞中miR-130a的表达情况;CCK8实验检测转染前后细胞对顺铂（DDP）敏感性的变化;并用Western blot检测转染前后细胞中PETN的表达变化。结果:MiR-130a在SGC7901／DDP中的表达水平是SGC7901细胞的（8.33±1.21）倍（P＜0.01）。SGC7901转染miR-130a mimics后,细胞中miR-130a表达水平是转染前的（5.52±1.65）倍（P＜0.01）,DDP对SGC7901增殖的抑制率较转染前明显下降（P＜0.01）,细胞内PTEN表达水平较转染前明显下降（P＜0.01）。SCG7901/DDP在转染miR-130a inhibitor 后,细胞中miR-130a表达水平是转染前的（0.18±0.04）倍（P＜0.01）,DDP对SCG7901/DDP增殖的抑制率与转染前比较明显增加（P＜0.01）,细胞内PTEN表达水平较转染前明显增高（P＜0.01）。结论:MiR-130a通过下调PTEN的表达来调节胃癌细胞对DDP的耐药。     

miR-142-5p对人上皮性卵巢癌细胞增殖和凋亡的影响

目的:探讨miR-142-5p靶向PTEN-PI3K/Akt信号调控人上皮性卵巢癌SKOV3细胞增殖和凋亡的具体机制。方法:Real-time PCR检测miR-142-5p在人卵巢癌组织及各卵巢癌细胞系中的表达情况。利用MTT、细胞克隆形成实验观察miR-142-5p对SKOV3细胞增殖活力的影响;Caspase-3活力检测miR-142-5p对SKOV3细胞凋亡情况;信号通路抑制剂处理及Western blot检测miR-142-5p、PTEN与PI3K/Akt信号通路的关系及PI3K/Akt信号下游基因Akt、FOXO1、cyclin D1等的表达情况;Luciferase实验验证miR-142-5p和PTEN 3' UTR的结合。结果:人上皮性卵巢癌组织及其细胞系中miR-142-5p表达显著增加（P<0.05)。与对照组相比,SKOV3细胞转染miR-142-5p mimics后活细胞数量显著增加,增殖能力显著上升,细胞凋亡下降（P<0.05);与之相反的,转染miR-142-5p inhibitor后SKOV3细胞增殖能力下调,凋亡增加。信号通路抑制剂处理显示miR-142-5p过表达激活PI3K/Akt信号通路。Luciferase实验显示miR-142-5p与PTEN 3' UTR直接结合。与对照组相比,miR-142-5p mimics组PTEN表达显著降低,p-Akt蛋白表达则显著上调（P<0.05）,同时过表达PTEN后p-Akt表达则显著降低（P<0.05）。结论:miR-142-5p通过抑制PTEN基因表达活化PI3K/Akt信号通路,促进人上皮性卵巢癌组织及SKOV3细胞增殖存活,抑制细胞凋亡。     

卵巢癌多药耐药基因的表达及其逆转

目的　探讨特异性靶向ＭＤＲ１基因的ｓｉＲＮＡ逆转耐药型卵巢癌细胞株多药耐药的可行性。方法　设计靶向于ＭＤＲ１基因的３条ｓｉＲＮＡ,用脂质体转染试剂分别转染Ｐ ｇｐ阳性表达的卵巢癌ＳＫＯＶ３／ＡＲ细胞,ＲＴ ＰＣＲ检测转染后４８小时ＭＤＲ１ｍＲＮＡ的变化,流式细胞技术检测转染后７２小时Ｐ ｇｐ的表达情况;ＭＴＴ法检测转染前及转染后４８小时ＳＫＯＶ３／ＡＲ细胞对阿霉素、紫杉醇的敏感性。结果　与空白对照组相比,含靶向ＭＤＲ１基因的ｓｉＲＮＡ-１组、ｓｉＲＮＡ-２组、ｓｉＲＮＡ-３组的ＭＤＲ１ｍＲＮＡ表达水平均有显著下降（Ｐ＜０.０５）,对ＭＤＲ１ｍＲＮＡ的抑制率分别为４３.３％、４1.３％和５８.５％,其中ｓｉＲＮＡ-３组对靶基因的抑制作用较强,而空白对照组、脂质体组和阴性对照ｓｉＲＮＡ组靶基因表达水平则无明显变化。将ｓｉＲＮＡ／ＭＤＲ１-３转染细胞７２小时后可观察到Ｐ-ｇｐ阳性表达率显著降低（Ｐ＜０.０５）,其抑制率为３７.９５％,而空白对照组、脂质体组及阴性对照ｓｉＲＮＡ组Ｐ-ｇｐ表达无明显降低（Ｐ＞０.０５）。ｓｉＲＮＡ ３干扰ＳＫＯＶ３／ＡＲ细胞后,阿霉素和紫杉醇的ＩＣ５０分别下降为干扰前的１／３.５６和１／３。结论　ＲＮＡｉ在体外实验能有效逆转卵巢癌细胞的耐药,为其在实体瘤耐药逆转的运用提供了实验依据,值得进一步研究。     

MicroRNA-mRNA functional pairs for cisplatin resistance in ovarian cancer cells

Ovarian cancer is the leading cause of death in women worldwide. Cisplatin is the core of first-line chemotherapy for patients with advanced ovarian cancer. Many patients eventually become resistant to cisplatin, diminishing its therapeutic effect. MicroRNAs （miRNAs） have critical functions in diverse biological processes. Using miRNA profiling and polymerase chain reaction validation, we identified a panel of differentially expressed miRNAs and their potential targets in cisplatin-resistant SKOV3/DDP ovarian cancer cells relative to cisplatin-sensitive SKOV3 parental cells. More specifically, our results revealed significant changes in the expression of 13 of 663 miRNAs analyzed, including 11 that were up-regulated and 2 that were down-regulated in SKOV3/DDP cells with or without cisplatin treatment compared with SKOV3 cells with or without cisplatin treatment. miRNA array and mRNA array data were further analyzed using Ingenuity Pathway Analysis software. Bioinformatics analysis suggests that the genes ANKRD17, SMC1A, SUMO1, GTF2H1, and TP73, which are involved in DNA damage signaling pathways, are potential targets of miRNAs in promoting cisplatin resistance. This study highlights candidate miRNA-mRNA interactions that may contribute to cisplatin resistance in ovarian cancer.     

趋化因子CX3CL1／CX3CR1生物轴促进铂类药物诱导卵巢癌细胞凋亡的研究

目的 探讨趋化因子CX3CL1及其受体CX3CR1与卵巢癌患者耐药及预后的关系,以及裸鼠耐药模型中CX3CL1、CX3CR1在铂类耐药过程中的变化,分析其表达水平与Fas信号通路的相关性。方法 利用癌症基因图集（TCGA）数据库中卵巢癌患者的全基因组表达谱,分析CX3CL1和CX3CR1在铂类敏感和耐药患者中的表达与临床病理特征的关系。利用已构建的带有绿色荧光标记的卵巢癌SKOV3敏感细胞（SKOV3-GFP）和顺铂耐药细胞（SKOV3-GFP／DDPⅢ）进行裸鼠皮下种植,成瘤后分次给予顺铂体内注射;qRT-PCR检测第0、2、5、8次顺铂注射后移植瘤组织中CX3CL1、CX3CR1与Fas信号通路上基因的表达水平。结果 CX3CL1表达与卵巢癌FIGO分期和铂类耐药产生呈负相关（r=-0.112,P=0.030;r=-0.106,P=0.044）;CX3CR1表达与无进展生存时间呈负相关（r=-0.130,P=0.029）和1年复发率呈正相关（r=0.119,P=0.045）。铂类敏感组卵巢癌患者的卵巢组织中CX3CL1的平均表达量为3.96±0.039,显著高于耐药组的3.64±0.55（P=0.000）。顺铂干预后,裸鼠皮下移植瘤体质量随时间推移而增加,SKOV3-GFP／DDPⅢ组形成的移植瘤体质量始终高于SKOV3-GFP组,在第5次给药后移植瘤开始逐渐变小。顺铂干预后,SKOV3-GFP组CX3CL1、CX3CR1表达水平明显升高（P=0.001,P=0.002）,SKOV3-GFP／DDPⅢ组CX3CL1、CX3CR1基因表达始终处于较低水平。SKOV3-GFP／DDPⅢ组中Fas信号通路上的Fas、FADD的表达较SKOV3-GFP组明显降低（P＜0.001）;而PARP1基因的相对表达较SKOV3 GFP组明显上调（P＜0.001）。CX3CL1和CX3CR1的表达与Fas信传导通路上节点基因Fas、FADD表达呈正相关,与下游PARP1基因的表达呈负相关。结论 CX3CL1、CX3CR1表达下调与铂类耐药形成相关,两者可能具有维持肿瘤细胞对铂类药物敏感性的作用。CX3CL1、CX3CR1在耐药细胞中的低表达可能通过某种机制抑制Fas信号传导通路,使其传导失调,抑制细胞凋亡及诱发卵巢癌对铂类耐药。     

牛蒡子苷元对卵巢癌细胞耐药性的影响

目的:探讨牛蒡子苷元对人卵巢癌顺铂耐药细胞株SKOV3/DDP细胞耐药性的影响及其可能的作用机制。方法:构建卵巢癌耐药细胞株SKOV3/DDP。用不同浓度的牛蒡子苷元(1、5、10、15、20、25 mmol/L)分别处理SKOV3和SKOV3/DDP细胞,CCK-8法检测细胞生长,筛选适用浓度。随后用10 mmol/L牛蒡子苷元处理SKOV3/DDP细胞。流式细胞仪检测细胞凋亡,Western blot检测Caspase-3/9和Cleaved Caspase-3/9蛋白表达。CCK-8法检测细胞半数抑制浓度(50%inhibition concentration, IC₅₀)。RT-PCR和Western blot分别检测Survivin的mRNA和蛋白表达。在牛蒡子苷元处理的SKOV3/DDP细胞中转染Survivin过表达质粒检测IC₅₀和细胞凋亡水平。结果:不同浓度牛蒡子苷元对SKOV3和SKOV3/DDP细胞生长均有抑制作用,并且当牛蒡子苷元的浓度≥10 mmol/L时,对SKOV3/DDP细胞生长抑制作用高于SKOV3细胞(P&...     

miR-145在浆液性卵巢癌中的表达及对卵巢癌SKOV3细胞增殖的影响

目的:检测miR-145在浆液性卵巢癌组织及卵巢癌SKOV3细胞中的表达情况,探讨其对卵巢癌SKOV3细胞增殖的影响及其可能的分子机制。方法:利用实时定量PCR技术检测43组浆液性卵巢癌患者癌及癌旁组织中miR-145的表达情况;利用实时定量PCR技术检测正常卵巢浆液腺细胞及SKOV3细胞中miR-145的表达情况;合成miR-145的模拟物miR-145 agomir,将该模拟物及对照分别转染入SKOV3细胞中,应用MTT法检测细胞增殖情况,明确miR-145对卵巢癌SKOV3细胞增殖的影响。结果:实时定量PCR结果显示,与癌旁组织相比,miR-145在浆液性卵巢癌患者癌组织中表达含量降低;与正常细胞相比,miR-145在SKOV3细胞中表达含量降低; MTT结果表明转染了miR-145 angomir的SKOV3细胞增殖受到明显的抑制。结论:miR-145在浆液性卵巢癌组织及SKOV3细胞中均表达含量降低,miR-145可以抑制卵巢癌细胞增殖,miR-145与卵巢癌患者预后密切相关,其含量增高提示好的预后,有望成为新的生物学标志物用于卵巢癌早期诊断及判断预后。     

miR-144-3p靶向zeb1调控卵巢癌细胞SKOV3的增殖和凋亡

目的:探讨miR-144-3p是否通过靶向E盒锌指结合蛋白1（zeb1）调控卵巢癌细胞SKOV3的增殖和凋亡。方法:qRT-PCR检测miR-144-3p在卵巢癌细胞和正常人卵巢上皮细胞中的表达差异。在卵巢癌细胞SKOV3中转染miR-144-3p mimics,MTT法测定细胞增殖,PI单染法检测细胞周期,Annexin V-FITC/PI双染法检测细胞凋亡,Western blot检测细胞中cyclinD1、p27、C-caspase-3蛋白表达。生物信息学软件预测miR-144-3p的靶基因可能为zeb1,荧光素酶报告系统鉴定其靶向关系。在卵巢癌细胞SKOV3中共转染miR-144-3p mimics、pcDNA3.1-zeb1,利用上述方法测定细胞增殖、周期和凋亡变化。结果:miR-144-3p在卵巢癌细胞中的表达水平低于正常人卵巢上皮细胞。转染miR-144-3p mimics后的卵巢癌细胞SKOV3增殖能力下降,细胞周期被阻滞在G1期,细胞凋亡增多,细胞中cyclinD1蛋白表达减少,p27、C-caspase-3蛋白表达增加。miR-144-3p靶向调控zeb1表达。pcDNA3.1-zeb1可以逆转miR-144-3p mimics对卵巢癌细胞增殖抑制、周期阻滞和凋亡促进作用。结论:miR-144-3p靶向zeb1抑制卵巢癌细胞SKOV3增殖并诱导细胞凋亡。     

载体表达小干扰RNA逆转卵巢癌的多药耐药

目的:探讨载体表达的小干扰RNA(smallinterferingRNA,siRNA)逆转卵巢癌细胞多药耐药的可行性。方法:浓度梯度诱导法建立人卵巢癌阿霉素耐药细胞株OVCAR/AR;脂质体介导将MDR1特异性siRNA的表达载体(pSN/mdr1a和pSN/mdr1b)转染OVCAR/AR细胞;实时定量RT-PCR检测MDRlmRNA的表达;流式细胞术检测P-gp的表达,罗丹明试验检测P-gp的药物转运功能;MTT法检测OVCAR/AR细胞对化疗药的抵抗性。结果:转染pSN/mdr1a和pSN/mdr1b后,OVCAR/AR细胞的MDR1mRNA和P-gp的表达均显著下降,P-gp的转运功能减少,OVCAR/AR细胞对阿霉素、泰素的耐药性逆转。结论:载体表达的siRNA可持久有效地抑制卵巢癌耐药细胞MDR1mRNA和P-gp的表达,并逆转其多药耐药。     

食管鳞癌细胞外泌体中miR-130a对血管新生的作用及其机制

目的 探讨食管鳞癌细胞外泌体中的miR-130a对血管新生的作用及其机制.方法 提取食管上皮细胞HEEC、食管鳞癌细胞TE-13和Eca-109所分泌的外泌体及转染miR-130a mimic、miR-130a inhibitor及其阴性对照(NC)后的Eca-109细胞外泌体,并与人脐静脉血管内皮细胞HUVEC共孵育...