EXPRESSION OF PLACENTAL ALKALINE PHOSPHATASE IN ESOPHAGEAL CANCER CELL LINE Eca109

The expression and properties of alkaline phosphatase (ALP) in Eca109 cells, a cell line derived fromhuman esophageal cancer were studied with specific inhibition assay and polyacrylamide gel electrophoresis.The results showed that ALP of Eca109 cells was heat stable and was strongly inhibited by L-pheuylalanine, but slightly inhibited by urea. Preduisolone could causedramatic increase in activity of ALP, but no change in ALP isozyme and concomitant increase in lactic dehydrogenase activity were found after prednisolone treatment. The results suggested that placental alkaline phosphatase as an oncodevelopmental gene product could be expressed ectopically by Eca109 cells and prednisolone could specifically induce increase in its activity.

SMAC exhibits anti-tumor effects in ECA109 cells by regulating expression of inhibitor of apoptosis protein family

BACKGROUND The poor prognosis and rising incidence of esophageal cancer highlight the need for improved therapeutics that are essential prior to treatment.LCL161 is an SMAC(second mitochondrial activator of caspases)mimic and inhibitor of apoptosis protein(IAP)antagonist which exhibits anti-tumor effects and improves the chemical sensitivity of many cancers.AIM To ascertain the effects and mechanisms of the SMAC analog LCL161 on esophageal cancer cells.METHODS MTT assay and TUNEL assay were used to detect cell proliferation and apoptosis,respectively.Western blot analysis was used to study the molecular mechanisms of LCL161-induced death of ECA109 cells.RESULTS LCL161 decreased ECA109 cell proliferation in dose-and time-dependent manner and induced apoptosis of ECA109 cells in a dose-dependent manner.Also,LCL161 induced a significant decrease in the expression of the XIAP and significant increase in the expression of Caspase-3.In addition,Bax increased significantly with increasing concentrations of LCL161,and the relative expression of Bax was significantly different between groups.CONCLUSION These findings support the hypothesis that LCL161 can inhibit proliferation and induce apoptosis in esophageal cancer cells by regulating the expression of IAP family members,suggesting that it has potential to be an effective treatment for esophageal squamous cell carcinoma.

Role of stress-activated MAP kinase P38 in cisplatin-and DTT-induced apoptosis of the esophageal carcinoma cell line Eca109

AIM： To study the role of P38 kinase in esophageal cancer cell apoptosis induced by genotoxin, cisplatin and the unfolded protein response （UPR） inducer, dithiothreitol （DTT）. METHODS： Esophageal carcinoma cell line Eca109 was cultured in RPMI 1640 medium to 70% confluency and treated with either cisplatin, DTT, or cisplatin plus DTT in the presence or absence of P38 inhibitor, SB203580. The untreated cells served as the control. The esophageal carcinoma cell apoptosis was detected by agarose gel DNA ladder analysis and quantified by flow cytometry. The P38 phosphorylation was detected by immunohistochemistry using antibodies specific to phosphorylated P38 protein. RESULTS： （1） Both cisplatin and DTF induced apoptosis in the esophageal cancer cell line Eca109 as shown by DNA ladder formation; （2） As detected by antibodies specific for the phosphorylated P38 protein （p-P38）, both cisplatin and DTT treatments activated the stress-activated enzyme, MAP kinase P38. The number of positive cells was about 50% for the treatment groups, comparing to that of 10% for untreated group. DTF treatment, but not cisplatin treatment, induces nuclear localization of p-P38; （3） As measured by flow cytometry, inhibition of P38 activity by SB203580 blocks DTT- and cisplatin-induced apoptosis. The rates for DTT, cisplatin, and DTT plus cisplatin-induced apoptosis were 16.8%, 17.1%, and 21.4%, respectively. Addition of the SB compound during the incubation reduced the apoptotic rate to about 7.6% for all the treatment groups, suggesting that P38 activation is essential for cisplatin- and DTT-induced apoptosis in Eca109 cells. CONCLUSION： （1） Both DTT and cisplatin were able to induce apoptosis in esophageal cancer cell line Eca109; （2） P38 MAP kinase is essential for DTT- and cisplatininduced apoptosis in Eca109 cells; （3） P38 activation may be the common signaling component relaying the multiple upstream signaling events to the downstream cell death program.

Essential oil from Saussurea costus inhibits proliferation and migration of Eca109 cells via mitochondrial apoptosis and STAT3 signaling

Objective:To investigate the effect and its underlying molecular mechanisms of essential oil from Saussurea costus in esophageal cancer cell line Eca109.Methods:The chemical composition of essential oil from Saussurea costus was investigated by gas chromatography-mass spectrometry(GC-MS).The anti-proliferative,anti-migrative,and apoptotic effects of essential oil from Saussurea costus against Eca109 cells were analyzed.Moreover,the expression of proteins associated with cell cycle,metastasis,and apoptosis was determined.Results:GC-MS analysis showed that essential oil from Saussurea costus was predominantly comprised of sesquiterpenes.Saussurea costus essential oil inhibited the viability of Eca109 cells in a dose-and time-dependent manner with IC_(50) values of(24.29±1.49),(19.16±2.27)and(6.97±0.86)μg/mL at 12,24,and 48 h,respectively.The expression levels of target proteins in the cell cycle(phase G_(1)/S),including cyclin D1,p21,and p53,were affected by Saussurea costus essential oil.The essential oil also downregulated the expression of metastasis-related proteins MMP-9 and MMP-2.Moreover,it induced apoptosis of Eca109 cells through the mitochondrial pathway,as well as inhibition of STAT3 phosphorylation.Conclusions:The essential oil from Saussurea costus exhibited anti-proliferative,anti-migrative,and apoptotic effects on Eca109 cells,and could be further explored as a potential anti-esophageal cancer agent.

Tonglian Decoction(通莲汤)Arrests the Cell Cycle in S-phase by Targeting the Nuclear Factor-Kappa B Signal Pathway in Esophageal Carcinoma Eca109 Cells

Objective： To investigate the anti-tumor activity and molecular mechanism of Tonglian Decoction （通莲汤, TLD） on esophageal carcinoma Eca109 cells. Methods： Ecal09 cells were treated with TLD and its separated formulae, including the clearing-heat and detoxification formula （Q）, activating-blood and promoting-qi formula （H） and nourishing-yin and blood formula （Z）. Cell proliferation was measured using the 3-（4,5-dimethyl-2- thiazolyl）-2,5-diphenyl-2-H-tetrazolium bromide assay, cell morphology was observed using a microscope, the cell cycle was measured using flow cytometry and the activity of the nuclear factor-kappa B （NF- K B） signal pathway was detected by Western blot. Results： The half maximal inhibitory concentrations of TLD, Q and H were 386, 771 and 729 rag/L, respectively. TLD, Q and H significantly inhibited cell proliferation, with 69.43%, 60.84% and 61.90% of treated cells in the G1 phase of the cell cycle. The percentage of cells in S phase increased significantly after treatment with TLD, Q, and H compared with the control group （P〈0.05）, and TLD showed the strongest effect. Z had no influence on the cell cycle compared with the control group （P〉0.05）. Western blot detection indicated slight differences in the inhibition of the NF- K B pathway by the different formulae. TLD formula strongly inhibited IKK β, NF- K B, interleukin-6 and tumor necrosis factor-α expression compared with the control group. Conclusions： TLD inhibited Eca109 cell proliferation by arresting cells in S phase. The possible mechanism might be related to inhibiting the NF- K B transduction cascade. The combination of the herbs found in the three separate formulae, H, Q and Z, work synergistically in TLD to produce the inhibitory effects of TLD treatment on Eca109 proliferation.

Combined Antitumor Effect of Ursolic Acid And 5-Fluorouracil on Human Esophageal Carcinoma Cell Eca-109 In Vitro

Objective： To study the combined antitumor effect and possible mechanisms of ursolic acid with 5-fluorouracil （5-FU） on human esophageal carcinoma cell Eca-109 in vitro. Methods： Eca-109 cells were treated with ursolic acid （10-50 μmol/L） and/or 5-fluorouracil （48.0-768.8 μmol/L） for 48 h in vitro. And then cell proliferation was determined by MTT assay. Cell cycle and apoptosis rate were analyzed by flow cytometry （FCM）. The morphological changes of apoptosis were observed by fluorescent microscopy. At last the expression of P27kipl, bcl-2 and bax were detected by western blot. Results： Results： In comparison with single agent treatment, the combination of ursolic acid and 5-fluorouracil produced greater efficacy in growth inhibition, cell cycle arrest at G0/G1 phase, and apoptosis induction （P〈0.05）. Western blot analysis showed that the combination use of ursolic acid and 5-fluorouracil suppressed the expression of bcl-2 and increased the expressions of bax and P27kip1. Conclusion： Ursolic acid combined with 5-fluorouracil showed adjuvant antiproliferative effects on human esophageal carcinoma cell Eca-109 in vitro, which mainly due to the induction of cell cycle arrest as well as apoptosis.

Impact of resveratrol on the expression of apoptosis related gene survivin and bax in human cancer cells

Objective： We explored the mechanism of apoptosis in human esophageal cancer Ecal09 cells by resveratrol. Methods： The suppressive ratio of resveratrol on Ecal09 cells proliferation was evaluated by MTT colorimetric assay and morphology was observed by transmission electron microscope. The expression of survivin and bax was analyzed by RT-PCR and Flow Cytometry （FCM）. Results： Resveratrol inhibited the growth of Ecal09 calls in a dose-and time-dependent man- ner, and the suppressive ratio arrived at 76.42%. Morphological apoptosis could be observed after treated with resveratrol.The bulk of some drug-treated cells turned small and the nuclear chromatin became condensed and rnarginated. The results determined by RT-PCR and FCM showed that resveratrol could down-regulate surviving, while up-regulate bax. Conclusion： Resveratrol could induce the apoptosis of human esophageal cancer Ecal09 cells, and its possible molecular mechanisms might be related to modulation the expression of survivin and bax.

Wilfoside C3N Promotes Tumor Cell Death by Activating Gammadelta T Cells-Mediated Anti-tumor Immunity

Vδ1^+γδ T lymphocytes are known to play important roles in anti-tumor immunity.We recently reported an anti-tumor activity of wilfoside C3 N,an active component extracted from Chinese medicinal herbs.In the current study,we evaluated the role of Vδ1^+γδ T cells in C3 N anti-tumor activity using an in vitro cell co-culture model.We found that C3 N induced the ECA109 tumor cells to undergo apoptosis in the presence of Vδ1^+γδ T cells.The level of ECA109 apoptosis maximized when both C3 N and Vδ1 + γδ T cells were present,which correlated with the increased expression of Fas on ECA109 and Fas ligand on Vδ1^+γδ T cells induced by C3 N.In addition,C3 N also enhanced secretion of cytokines,perforin and granzymes by Vδ1^+γδ T cells.These observations suggest that activation of Vδ1^+ γδ T cells may play a critical role in C3N-mediated anti-tumor activity.

多种肿瘤干细胞标志物在食管鳞癌 Eca109细胞球细胞中的表达

目的观察肿瘤干细胞标志物P75NTR、Oct-4、Sox-2、Lin28、Nanog在食管鳞癌Eca109细胞系富集的细胞球细胞中的表达。探讨食管鳞癌的肿瘤干细胞标记物。方法采用无血清成球培养法,富集培养细胞球细胞,观察其增殖过程。培养5d获得小细胞球继续培养至14d获得又大又圆的悬浮生长的细胞球,收集第14天的细胞球,一部分用于实验,一部分予以传代。应用免疫荧光技术检测细胞球细胞中P75NTR、Oct-4、Sox-2、Lin28、Nanog的表达和定位。结果 P75NTR、Oct-4荧光定位于细胞球细胞的细胞核上,贴壁的Eca109为细胞核和细胞质表达,但是Oct-4荧光强度比P75NTR弱;Lin28在细胞球细胞上为细胞核表达,贴壁的Eca109上为细胞核和细胞质表达;Nanog和Sox-2在食管鳞癌Eca109细胞球细胞和贴壁的Eca109上均为细胞质表达。结论 P75NTR、Oct-4、Lin28核表达阳性的细胞球可能为食管癌干细胞。

Dual effects of 8-Br-cAMP on differentiation and apoptosis of human esophageal cancer cell line Eca-109

AIM: To investigate the effects of 8-Br-cAMP on differentiation and apoptosis of human esophageal cancer cell line Eca-109, and the related gene expression.METHODS: The cultured Eca-109 cells were divided into four groups: E1 group (co-cultured with 8-Br-cAMP for 24 h); E2 group (co-cultured with 8-Br-cAMP for 48 h); C1 group (treated without 8-Br-cAMP for 24 h); and C2 group (treated without 8-Br-cAMP for 48 h). The same concentration of cell suspension of each group was dropped separately onto the slides and nitrocellulose membranes (NCM). The biotin-labeled cDNA probes for c-myc, wild-type (wt) p53, bcl-2 and iNOS were prepared for in situ hybridization. The expressions of epidermal growth factor receptor (EGFR), p38 kinase, FAS, FasL and caspase-3 were detected using immunocytochemistry, and the NOS activity and the ratio of differentiated cells/proliferating cells were examined by cytochemistry. Immunocytochemistry, cytochemistry,and in situ hybridization were separately carried out on both slides and NCM specimens for each group. In addition, TUNEL was used to detect the cell apoptosis rate in each group.RESULTS: The apoptotic rate of E2 group was significantly higher compared to E1 group, while there was no difference in the ratio of differentiated cells/ proliferating cells between E1 and E2 groups. The signals of wt p53 and iNOS were markedly stronger, while the signals of c-myc and EGFR were obviously weaker in E1 group than those in C1 group (P＜0.05). Moreover, the signals of wt p53, iNOS, p38 kinase, caspase-3 and NOS activity were significantly stronger, whereas, the signals of bcl-2, c-myc and Fas/FasL were markedly weaker in E2 group than those in C2 group (P＜0.05). CONCLUSION: The differentiation and apoptosis of human esophageal cancer cell Eca-109 can be induced after 24- and 48-h treatment with 8-BrcAMP, respectively. Upregulation of wt p53, iNOS and downregulation of c-myc may be associated with differentiation and apoptosis of Eca-109 cells.Furthermore, upregulation of FasL, p38 kinase and caspase-3 as well as downregulation of bcl-2, and Fas may be involved in the apoptosis of Eca-109 cells.

EC9706和Eca109细胞中雷帕霉素靶蛋白信号通路激活状态观察

目的:观察低分化的食管鳞癌细胞EC9706和高分化的食管鳞癌细胞Eca109中雷帕霉素靶蛋白(mTOR)信号转导通路的激活状态。方法:采用细胞免疫组织化学方法检测EC9706和Eca109细胞中mTOR及其下游靶分子p70S6K的表达和定位,并采用RT-PCR和Westernblot方法分别从mRNA及蛋白水平检测此通路的活性。结果:在2种细胞中mTOR均有表达,且在EC9706细胞中的表达水平高于Eca109(P<0.05);EC9706细胞中mTOR下游靶点的磷酸化水平高于Eca109细胞(P<0.05)。结论:在2种食管鳞癌细胞中,mTOR信号通路均特异性激活;但激活状态与细胞的分化程度有关,细胞分化程度低者通路的激活水平较高。

仙鹤草水提液对食管癌Eca109细胞生长的抑制作用

目的:研究仙鹤草水提液对人食管癌Eca109细胞生长的抑制作用及其可能机制。方法:MTT法测定0g/L、2g/L、4g/L、8g/L、16g/L的仙鹤草水提液分别作用于Eca109细胞24h、48h、72h,观察对Eca109细胞生长的抑制作用;采用免疫组织化学染色技术检测16g/L仙鹤草水提液作用72h对Eca109细胞Bcl-2、P53蛋白表达的影响。结果:MTT结果显示16g/L仙鹤草水提液作用48h和72h后Eca109细胞生长明显受抑;免疫组化结果显示16g/L仙鹤草水提液作用72h后Eca109细胞内Bcl-2蛋白表达下调,P53蛋白表达上调。结论:仙鹤草水提液体外能诱导Eca109细胞凋亡,其机制可能与下调Bcl-2蛋白表达及上调P53蛋白表达有关。

戊地昔布诱导人食管癌Eca109细胞凋亡的机制研究

目的探讨特异选择性环氧化酶-2（COX-2）抑制剂戊地昔布诱导人食管癌Eca109细胞凋亡及其作用机制。方法流式细胞术检测细胞凋亡和细胞周期分布；电子显微镜进一步检测细胞凋亡；采用乳酸脱氢酶（LDH）试剂盒测定Eca109细胞的LDH含量；流式细胞术检测p-p38MAPK及凋亡基因Fas和FasL蛋白的表达。结果戊地昔布（25—400μmol·L^-1）可诱导人食管癌Eca109细胞发生凋亡，凋亡率由（2．95±0．83）％增力口到（48．46±0．73）％；50—400μmol·L^-1时增殖指数和S期的细胞比例则明显降低，G0／G1期的细胞比例增加；同时，流式细胞术显示，25μmol·L^-1戊地昔布即可上调人食管癌Eca109细胞p-p38MAPK蛋白的表达，并随剂量的增加而增强；50—400μmol·L^-1的戊地昔布可上调Eca109细胞Fas及FasL的表达。结论戊地昔布可诱导人Eca109细胞凋亡，其诱导凋亡的机制可能部分是通过激活p-p38MAPK／Fas、FasL途径实现的。

香加皮三萜类化合物抑制食管癌Eca109细胞裸鼠成瘤及其机制

目的:研究香加皮三萜类化合物(triterpenes compounde xtracted from cortex periplocae,TCCP)对荧光素酶(luciferase)标记的人食管鳞癌细胞株Eca109(Eca109-luc细胞)在裸鼠体内成瘤的作用及其机制。方法:Eca109-luc细胞经皮下接种裸鼠,构建Eca109-luc细胞裸鼠移植瘤模型,观察TCPP治疗后移植瘤体积和质量的变化,应用活体成像系统观察移植瘤生长情况,H-E染色观察移植瘤组织形态学变化,流式细胞仪检测移植瘤细胞的凋亡,Westernblotting检测移植瘤组织中survivin的表达。结果:TCPP在体内能明显抑制裸鼠Eca109-luc移植瘤的生长,移植瘤体积和质量明显减少,抑瘤率为40.7%。TCPP治疗组小鼠移植瘤组织出现明显炎性细胞浸润及肿瘤细胞坏死,移植瘤细胞的凋亡率明显高于大豆油对照组(P<0.05),移植瘤组织中survivin蛋白表达水平明显下降(P<0.05)。结论:TCCP在体内能抑制人食管癌Eca109细胞的生长,其作用机制可能与下调survivin的表达诱导肿瘤细胞凋亡有关。

p38MAPK在戊地昔布诱导Eca109细胞凋亡中的调控作用

目的探讨p38MAPK信号转导途径在戊地昔布诱导食管癌Eca109细胞凋亡中的调控作用。方法将正常培养的人食管癌Eca109细胞随机分为正常对照组、戊地昔布组和戊地昔布+SB203580组;采用流式细胞术和DNA Ladder检测凋亡情况;RT-PCR检测p38mRNA的表达变化;流式细胞术和免疫细胞化学检测p38蛋白的表达变化。结果①戊地昔布能够诱导Eca109细胞发生凋亡,并呈剂量依赖性,而SB203580能够部分降低戊地昔布诱导的Eca109细胞的凋亡率;②戊地昔布能够上调Eca109细胞中p38mRNA和蛋白的表达,而戊地昔布+SB203580组p38mRNA和蛋白的表达下降;③p38蛋白表达与凋亡率呈正相关。结论戊地昔布能够通过部分激活p38MAPK信号途径诱导Eca109细胞发生凋亡。

IL-27基因修饰Eca109细胞的体外体内凋亡作用的研究

目的研究IL-27基因转染人食管癌Eca109细胞株后在体外和体内对细胞凋亡的影响,从而探讨其抗肿瘤作用及其机制。方法基因转染的方法建立稳定表达IL-27基因的人食管癌细胞株(Eca109/IL-27),观察Eca109/IL-27细胞生长情况、移植瘤的生长情况及生存期,用流式细胞技术检测体外和体内的细胞凋亡率和Fas的表达,采用Western blot检测Survivin的表达。结果成功建立稳定转染的Eca109/IL-27细胞株,RT-PCR示Eca109/IL-27细胞中有mIL-27p28和EBI3亚基基因表达,而Eca109/LXSN和Eca109细胞中未见表达(P<0.01),IL-27基因转染不影响人食管癌细胞株的体外生长和细胞凋亡,Fas和Survivin的表达无变化(P>0.05);但体内Eca109/IL-27移植瘤生长较Eca109和Eca109/LXSN滞后,生存时间延长(P<0.05),肿瘤组织细胞凋亡率增高(P<0.05),细胞表面Fas的表达增加(P<0.05),Survivin表达降低(P<0.05)。结论IL-27在体外不影响细胞凋亡,体内可能通过降低Survivin的表达,上调Fas的表达,诱导细胞凋亡产生抗肿瘤作用。

二硫苏糖醇诱导Eca109细胞凋亡及P38磷酸化检测

目的:检测二硫苏糖醇(DTT)诱导Eca109细胞凋亡及磷酸化P38(PP38)水平。方法:取对数生长期Eca109细胞分为3组:2mmol/L DTT处理组、PP38抑制剂SB203580孵育细胞2h后再加DTT处理组及对照组。应用流式细胞仪检测各组细胞凋亡率;采用免疫组织化学技术检测P38的磷酸化水平。结果:DTT组、SB203580+DTT组及对照组的细胞凋亡率分别为16.8%、7.8%和3.1%。DTT组和DTT+SB203580组细胞凋亡率均高于对照组(P<0.01);与DTT组相比,SB203580+DTT组凋亡率下降(P<0.01)。DTT组PP38水平高于对照组(P<0.01)。结论:DTT可诱导人食管癌Eca109细胞凋亡,P38磷酸化起促进凋亡的作用。

lncRNA NUP50-AS1在食管鳞癌组织中的表达及其对Eca109细胞恶性生物学行为的影响

目的:探讨长链非编码RNA(long non-coding RNA, lncRNA)NUP50-AS1在食管鳞状细胞癌(esophageal squamous cell cancer, ESCC)组织及细胞株中的表达及其对人食管癌Eca109细胞增殖、迁移和侵袭的影响。方法:选取自2015年1月至2016年12月河北医科大学第四医院生物标本库的49例ESCC手术患者的癌组织和相应癌旁组织,qRT-PCR检测ESCC癌组织、癌旁组织及5种食管癌细胞株(TE1、TE13、Eca109、Kyse150和Kyse170)中NUP50-AS1表达水平。shRNA转染NUP50-AS1后,选用sh2-NUP50-AS1进行后续功能实验。采用MTS法、克隆形成实验检测敲减NUP50-AS1表达对Eca109细胞增殖的影响,划痕实验检测敲减NUP50-AS1表达对细胞迁移的影响,Transwell小室实验检测敲减NUP50-AS1表达对细胞侵袭的影响。结果:NUP50-AS1在ESCC组织中的相对表达量显著高于癌旁组织(2.003±0.870 vs 1.000±0.000,P<0.05);NUP50-AS1在ESCC组织中的表达水平与淋巴结转移及TNM分期相关(均P<0.01),NUP50-AS1在5株食管癌细胞系中相对表达量均明显上调(P<0.05),其中Eca109细胞的NUP50-AS1表达水平最高。转染后,sh2-NUP50-AS1转染组干扰效率最高,敲低NUP50-AS1可明显抑制Eca109细胞增殖、迁移和侵袭能力。结论:ESCC组织中lncRNA NUP50-AS1表达明显高于癌旁组织,且与癌症分期和淋巴结转移有关,敲减其表达明显抑制食管癌细胞增殖、迁移和侵袭能力,NUP50-AS1的高表达可能与ESCC的发生发展密切相关。

IL-27基因对Eca109细胞在裸鼠体内的成瘤抑制作用及其机制

背景与目的:细胞因子为主的肿瘤生物治疗已成为肿瘤研究领域热点之一。本研究观察白细胞介素(interleukin,IL)-27基因转染人食管癌Eca109细胞株后在裸鼠体内的成瘤抑制作用及其机制。方法:以逆转录病毒为载体,采用基因转染的方法用G418梯度筛选法建立转染IL-27基因的Eca109细胞,RT-PCR检测其基因导入情况,ELISA法检测IL-27的分泌和其诱导外周血单个核细胞(peripheral blood mononuclear cells,PBMC)产生γ-干扰素(interferon,IFN)的能力,MTT法观察Eca109/IL-27细胞生长情况。将Eca109/IL-27、Eca109/LXSN和Eca109细胞接种于裸鼠皮下,观察其成瘤性、移植瘤的生长情况并计算抑瘤率。流式细胞技术检测移植瘤组织肿瘤浸润淋巴细胞(tumor infiltrating lymphocyte,TIL)中CD16、FasL的表达和肿瘤细胞上Fas的表达。结果:RT-PCR示Eca109/IL-27细胞中有IL-27p28和IL-27EBI3亚基基因表达,Eca109/LXSN和Eca109细胞中未见表达(P<0.01),从而成功建立稳定转染的Eca109/IL-27细胞株,ELISA检测Eca109/IL-27中IL-27的分泌量高于Eca109/LXSN和Eca109细胞(P<0.01)。IL-27基因转染不影响人食管癌细胞株的体外生长(P>0.05),Eca109/IL-27诱导PBMC产生IFN-γ含量高于Eca109/LXSN和Eca109[(56.28±1.61)pg/mL vs.(12.70±0.82)pg/mL]和(11.06±0.64)pg/mL,P<0.01),Eca109/IL-27移植瘤体积较Eca109和Eca109/LXSN减小,瘤重减轻,有抑瘤作用(P<0.05);Eca109/IL-27细胞接种的肿瘤组织TIL中CD16阳性率升高,FasL的表达增高(P<0.05),肿瘤细胞表面Fas表达增加(P<0.05)。结论:IL-27基因修饰Eca109细胞在裸鼠体内产生了抑制肿瘤生长的作用,其机制可能是通过活化自然杀伤细胞,以Fas/FasL的途径产生的。

LINC01140通过miR-452-5p/Wnt/β-catenin轴调控食管鳞状细胞癌Eca109细胞的增殖与侵袭

目的:探讨长链非编码RNA(lncRNA)LINC01140在食管鳞状细胞癌(esophageal squamous cell carcinoma,ESCC)组织及细胞中的表达及其对Eca109细胞增殖与侵袭的影响及其分子机制。方法:选取2012年3月至2015年5月河北医科大学第四医院收治的133例ESCC患者的临床资料和GEPIA数据库中收集的182例ESCC组织及286例食管正常黏膜组织的LINC01140表达数据,以及ESCC细胞系Kyse150、Eca109和TE13。用qPCR法检测癌组织和细胞中LINC01140的表达水平,分析其表达水平与患者临床病理特征及预后的关系。分别将pcDNA3.1-LINC01140、阴性对照(pcDNA3.1-NC)或miR-452-5p mimic及阴性对照(miR-NC)转染到Eca109细胞,MTS、Transwell实验分别检测细胞的增殖与侵袭能力。用双荧光报告基因实验及TOP/FOP报告基因系统检测LINC01140与miR-452-5p的靶向结合作用及LINC01140对Wnt/β-catenin通路活化水平的影响。结果:LINC01140在ESCC组织和细胞中表达均显著下调(均P<0.01),LINC01140低表达与ESCC患者年龄、淋巴结转移、TNM分期及OS密切相关(均P<0.05)。LINC01140过表达明显抑制Eca109细胞的增殖及侵袭能力(均P<0.01)。机制研究表明,LINC01140可能通过竞争结合miR-452-5p影响Wnt/β-catenin信号通路的活化水平继而调控Eca109细胞的恶性生物学行为。结论:LINC01140通过靶向miR-452-5p/Wnt/β-catenin轴促进ESCC细胞的增殖与侵袭能力,其有望成为ESCC患者靶向治疗的潜在靶点及预后评估的标志物。