α-细辛醚上调细胞色素C及Caspase-3表达影响食管癌Eca-109细胞的生物学行为

目的:分析α-细辛醚上调细胞色素C(cytochrome C,cytC)及Caspase-3表达对食管癌Eca-109细胞生物学行为的影响。方法:将食管癌Eca-109细胞随机等量分为4组,即低、中及高剂量(分别给予25、50及100 mg/L的α-细辛醚),另随机取等量细胞加入等体积培养液作为空白组,培养48 h后通过平板克隆实验检测4组细胞增殖情况,Annexin V/PI法检测细胞凋亡情况,RT-qPCR及Western Blot法检测细胞中cytC及Caspase-3 mRNA及蛋白表达。结果:(1)细胞克隆数在空白组最高,低剂量组显著高于高剂量组;凋亡率在空白组最低,低剂量组显著低于高剂量组。(2)4组细胞迁移至小室下的细胞数空白组>低剂量组>中剂量组>高剂量组。(3)CytC及Caspase-3蛋白在高剂量组表达显著高于空白组及低剂量组,且中剂量组表达高于空白组。(4)CytC及Caspase-3 mRNA的表达:高剂量组>中剂量组>低剂量组>空白组,差异均有统计学意义(均P<0.05)。结论:α-细辛醚抑制Eca-109细胞增殖及侵袭,并且可能通过上调cytC及Caspase-3表达促进调亡。

对映-贝壳杉烷型二萜化合物Pseurata H对人食道癌ECA-109细胞生长的影响

为了研究对映-贝壳杉烷型二萜化合物Pseurata H对人食道癌ECA-109细胞的增殖抑制和诱导凋亡的作用,利用倒置显微镜观察法和CCK-8检测Pseurata H对ECA-109细胞生长的影响;利用考马斯亮蓝染色法和吖啶橙/溴化乙啶(AO/EB)双染法检测药物对细胞的张力纤维损伤和细胞核形态的影响.结果显示,用浓度分别为3.125μmol/L、6.25μmol/L、12.5μmol/L、25μmol/L的Pseurata H作用ECA-109细胞24 h后,ECA-109细胞生长均受到抑制,Pseurata H对ECA-109细胞的半抑制浓度值(IC 50)为3.22μmol/L,当浓度6.25μmol/L的药物作用细胞24 h后,细胞数量减少、形态开始变圆脱落、微丝减少且核仁凝结,随着浓度增加,现象越明显.由此可见,二萜化合物Pseurata H在体外能抑制食道癌ECA-109细胞生长,具有时间-剂量依赖效应.

右美托咪定对食管癌Eca-109细胞LINC00982表达及生物学行为的影响

目的:探讨右美托咪定对食管癌Eca-109细胞LINC00982表达及生物学行为的影响及其可能作用机制。方法:以0、25、50、100μg/L右美托咪定处理的Eca-109细胞分别为对照组和右美托咪定低、中、高浓度组。pcDNA、pcDNA-LINC00982分别转染至Eca-109细胞,作为pcDNA和pcDNA-LINC00982组;si-NC、si-LINC00982分别转染至Eca-109细胞后加入100μg/L右美托咪定处理24 h,作为右美托咪定+si-NC组和右美托咪定+si-LINC00982组。分别应用CCK-8法、流式细胞术、平板克隆形成实验、划痕和Transwell实验检测各组细胞增殖、凋亡、克隆形成、迁移及侵袭情况;采用Western blot检测各组细胞Bax、E-cadherin、Bcl-2和N-cadherin蛋白的表达。采用qRT-PCR检测各组细胞LINC00982的表达。结果:与对照组比较,右美托咪定低、中、高浓度组Eca-109细胞增殖抑制率、细胞凋亡率、Bax和E-cadherin蛋白以及LINC00982表达水平升高,细胞克隆形成数、迁移及侵袭细胞数减少,划痕愈合率和Bcl-2、N-cadherin蛋白表达水平降低(P均<0.05);与pcDNA组比较,pcDNA-LINC00982组Eca-109细胞增殖抑制率、细胞凋亡率、Bax和E-cadherin蛋白表达水平升高,细胞克隆形成数、迁移及侵袭细胞数减少,划痕愈合率和Bcl-2、N-cadherin蛋白表达水平降低(P均<0.05);与右美托咪定+si-NC组比较,右美托咪定+si-LINC00982组Eca-109细胞增殖抑制率、细胞凋亡率和Bax、E-cadherin蛋白表达水平降低,细胞克隆形成数、迁移及侵袭细胞数增多,划痕愈合率和Bcl-2、N-cadherin蛋白表达水平升高(P均<0.05)。结论:右美托咪定可能通过上调LINC00982的表达而抑制食管癌细胞增殖、迁移及侵袭,并促进细胞凋亡。

miR-216b-5p靶向ATG5介导自噬逆转食管癌Eca109细胞的顺铂耐药性

目的:探讨miR-216b-5p对食管癌Eca109细胞顺铂(DDP)耐药性的影响及其作用机制。方法:采用qPCR法检测miR-216b-5p在食管癌细胞TE-1、KYSE-150、Eca109和耐药细胞Eca109/DDP中的表达水平。利用脂质体转染技术分别将miR-216b-5p mimic及mimic NC、自噬相关蛋白5(ATG5)过表达质粒转染到Eca109/DDP细胞中,用CCK-8、EdU法和FCM分别检测转染后细胞的增殖和凋亡;mRFP-eGFP-LC3双荧光标记实验检测mRFP-eGFP-LC3慢病毒感染后各组细胞自噬发生情况,WB法检测自噬相关蛋白LC3、Beclin 1和P62表达。用荧光素酶报告基因实验验证miR-216b-5p与ATG5的靶向关系,WB法检测ATG5的表达。建立裸鼠Eca109/DDP细胞移植瘤模型,观察miR-216b-5p过表达对移植瘤生长的影响。结果:miR-216b-5p在TE-1、KYSE-150、Eca109和Eca109/DDP细胞中均呈低表达(均P<0.05)。过表达miR-216b-5p可显著抑制Eca109/DDP细胞的增殖并诱导凋亡(均P<0.05),减少细胞中自噬小体数量(P<0.05),下调LC3Ⅱ/LC3Ⅰ比值和Beclin 1蛋白水平、上调P62蛋白水平(均P<0.05)。双荧光素酶报告基因实验证实miR-216b-5p靶向并负调控ATG5的表达(P<0.05),过表达ATG5可使miR-216b-5p mimic对Eca109/DDP细胞增殖、自噬的抑制作用和凋亡的诱导作用明显减弱(均P<0.05),自噬相关蛋白P62表达降低、LC3Ⅱ/LC3Ⅰ比值和Beclin 1表达升高(均P<0.05)。荷瘤实验结果表明,miR-216b-5p过表达可显著抑制裸鼠移植瘤的生长(P<0.05)。结论:miR-216b-5p过表达可逆转食管癌Eca109/DDP细胞对DDP的耐药性,其机制可能与靶向负调控ATG5表达并影响细胞自噬有关。

ATP/P2X7轴介导的K^(+)外排促进NDV感染的ECA109细胞中NLRP3炎性小体激活

目的探究新城疫病毒(NDV)感染食管癌ECA109细胞后,NLRP3炎性小体是否激活、其激活是否与K^(+)外排有关及ATP/P2X7轴对NLRP3炎性小体激活的影响。方法Western blot检测NLRP3和IL-1β表达情况;ELISA检测上清液中IL-1β含量;荧光免疫技术检测ASC斑点的形成情况;荧光探针技术检测细胞内K^(+)浓度变化;使用ATP酶、ATP及P2X7受体抑制剂进行干预,研究其在NLRP3炎性小体激活中的作用。结果与control组比较,NDV F3感染细胞后,细胞内NLRP3、IL-1β和ASC蛋白表达上调;胞内钾离子浓度随感染时间延长而降低(P<0.05)。P2X7受体抑制剂干预后,胞内K^(+)外流受阻,随抑制剂浓度的增加,K^(+)外流在10 mol/L处受最大抑制(P<0.05)。ATP酶及ATP干预结果显示,ATP酶抑制K^(+)外流,ATP促进K^(+)外流。Western blot结果显示,与control组比较,抑制P2X7受体,NLRP3和IL-1β蛋白表达下调;ATP酶干预细胞后,NLRP3和IL-1β表达降低;ATP干预细胞后,NLRP3、IL-1β蛋白表达上调(P<0.05)。结论NDV F3感染ECA109细胞能激活NLRP3炎性小体,其机制可能与ATP/P2X7轴有关。

白藜芦醇通过铁死亡途径逆转食管癌细胞Eca109/DDP化疗耐药

背景白藜芦醇不仅具有抗肿瘤作用,其还能增强多种化疗药物的化疗敏感性,但其对食管癌耐药细胞的顺铂敏感性的作用尚不清楚.目的探讨白藜芦醇逆转食管癌细胞Eca109/DDP的耐药效应并从铁死亡的角度分析其潜在的作用机制.方法采用MTT法确定白藜芦醇和顺铂的最佳作用时间和浓度;检测细胞增殖、细胞内丙二醛(malondialdehyde,MDA)、谷胱甘肽(glutathione,GSH)、活性氧(reactive oxygen species,ROS)及铁离子的水平;Western blot检测铁死亡相关调控因子酰基辅酶A合成酶长链家族成员4(acyl coenzyme A synthetase long chain family member 4,ACSL4)、铁蛋白重链(ferritin heavy chain,FTH)、谷胱甘肽过氧化物酶4(glutathione peroxidase 4,GPX4)和肿瘤蛋白53(tumor protein 53,P53)的蛋白表达情况.结果MTT检测结果显示,相较于单用顺铂,联用白藜芦醇对Eca109/DDP细胞的生长抑制作用较为显著(P<0.05).此外,白藜芦醇和顺铂联用可显著降低Eca109/DDP细胞克隆形成数(P<0.05),增加细胞内铁离子、MDA和ROS水平(P<0.05),降低GSH水平(P<0.05).铁死亡抑制剂(ferrostatin-1,Fer-1)和铁离子螯合剂(deferoxamine,DFO)可部分逆转白藜芦醇对细胞增殖的抑制作用(P<0.05).Western blot的结果显示相较于其他组,白藜芦醇和顺铂联用组的FTH和GPX4的蛋白表达显著降低(P<0.05),而ACSL4和P53的蛋白表达显著增加(P<0.05).结论白藜芦醇可通过铁死亡抑制Eca109/DDP细胞的增殖并逆转顺铂耐药.

β-榄香铜酸对人食管癌细胞Eca-109的抑制作用

目的探究β-榄香铜酸对人食管癌细胞Eca-109增殖、迁移、侵袭的影响及作用机制。方法使用不同浓度的β-榄香铜酸(0、20、40、60μmol/L)处理Eca-109细胞,首先进行MTT、平板克隆、细胞划痕、transwell迁移、transwell侵袭实验检测β-榄香铜酸对Eca-109的细胞增殖、迁移、侵袭的影响;之后在60μmol/L浓度组使用铁死亡抑制剂Ferrostatin-1(Fer-1)干预探索其作用机制。使用试剂盒检测Eca-109细胞中Fe^(2+)、ROS、lipid ROS、GSH、MDA含量,使用Western blot实验检测Eca-109细胞中GPX4、PTGS2和4-HNE的蛋白表达。结果β-榄香铜酸可呈剂量依赖性抑制Eca-109的细胞增殖、克隆形成、迁移、侵袭,激活Eca-109中铁死亡通路蛋白PTGS2和4-HNE,导致GPX4失活,出现铁依赖性的脂质过氧化。Ferrostatin-1可抑制整个进程,从而减少Eca-109细胞的铁死亡。结论β-榄香铜酸可通过铁死亡通路抑制人食管癌细胞Eca-109,有望成为潜在抗食管癌的药物。

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.

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.

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.

芝麻酚通过AMPK/SIRT1/NF-κB信号通路调控食管鳞状细胞癌Eca109细胞的自噬和凋亡

目的:探讨芝麻酚(SEM)通过腺苷酸活化蛋白激酶(AMPK)/沉默信息调节因子1(SIRT1)/核因子κB(NF-κB)通路影响食管鳞状细胞癌(ESCC)Eca109细胞自噬和凋亡的机制。方法:用不同浓度的SEM(0、1.5625、3.125、6.25、12.5、25、50、100、200、400μmol/L)分别处理Eca109细胞、人食管上皮细胞HEEpiC 48 h,CCK-8法检测细胞增殖率,筛选适宜的SEM浓度用于后续实验。将Eca109细胞分为对照组(CK组,0μmol/L)、低剂量SEM组(SEM-L组,25μmol/L)、中剂量SEM组(SEM-M组,50μmol/L)、高剂量SEM组(SEM-H组,100μmol/L)、高剂量SEM+Compound C(AMPK抑制剂)组(SEM-H+Compound C组,100μmol/L+10μmol/L),所有各组Eca109细胞在对应的药物浓度下处理48 h后,CCK-8法检测Eca109细胞增殖,流式细胞术检测细胞凋亡,透射电镜观察Eca109细胞内自噬小体,WB法检测Eca109细胞中微管相关蛋白1轻链3(LC3)-Ⅱ/LC3-Ⅰ、Beclin-1、B淋巴细胞瘤2(Bcl2)、Bcl2相关X蛋白(BAX)、p-AMPK、SIRT1、p-NF-κB p65的表达。结果:通过预实验选择SEM实验浓度为25、50、100μmol/L用于正式研究。在SEM处理下,与CK组比较,SEM-L组、SEM-M组、SEM-H组Eca109细胞的增殖水平(24、48 h)和Bcl2、p-NF-κB p65蛋白表达均显著降低,细胞凋亡率和自噬小体数量、LC3-Ⅱ/LC3-Ⅰ、Beclin-1、BAX、p-AMPK、SIRT1蛋白表达显著升高,且呈剂量依赖性(均P<0.05);与SEM-H组比较,SEM-H+Compound C组Eca109细胞增殖水平(24、48 h)和Bcl2、p-NF-κB p65蛋白表达均显著升高,细胞凋亡率和自噬小体数量、LC3-Ⅱ/LC3-Ⅰ、Beclin-1、BAX、p-AMPK、SIRT1蛋白表达均显著降低(均P<0.05)。结论:SEM可能通过激活AMPK/SIRT1信号通路而抑制NF-κB活性来促进Eca109细胞自噬与凋亡。

微RNA-205与人食管癌放射治疗抵抗细胞株Eca-109R放射抗性的相关性

目的探讨人食管癌放射治疗抵抗细胞株Eca-109R中微RNA(miR)-205的表达水平与放射抗性的相关性。方法取人食管鳞状细胞癌细胞株Eca-109,采用多次逐渐递增剂量的射线照射建立人食管癌放射治疗抵抗细胞株Eca-109R;另取Eca-109细胞,待细胞培养至融合度达到50%~70%时将miR-205 mimics转染入Eca-109细胞,形成Eca-109 miR-205过表达细胞。根据照射剂量将Eca-109细胞、Eca-109R细胞和Eca-109 miR-205过表达细胞分别分为0 Gy组、2 Gy组、4 Gy组、6 Gy组、8 Gy组、10 Gy组。用倒置显微镜观察Eca-109和Eca-109R细胞的形态,细胞计数试剂盒-8实验检测Eca-109细胞、Eca-109R细胞和Eca-109 miR-205过表达细胞的存活率;细胞克隆形成实验检测Eca-109细胞、Eca-109R细胞和Eca-109 miR-205过表达细胞的增殖情况;反转录聚合酶链式反应检测Eca-109细胞、Eca-109R细胞和Eca-109 miR-205过表达细胞中miR-205的表达水平。结果Eca-109细胞形态均一,大小一致,大多呈片状或梭状,折光性良好;Eca-109R细胞可见少量多角形细胞,伴有颗粒感,折光性差。在0 Gy组,Eca-109R细胞、Eca-109 miR-205过表达细胞与Eca-109细胞的存活率和细胞增殖能力比较差异无统计学意义(P>0.05)。在2、4、6 Gy组,Eca-109R细胞、Eca-109 miR-205过表达细胞的存活率和细胞增殖能力显著高于Eca-109细胞(P<0.05)。在8 Gy组,Eca-109R细胞的存活率和细胞增殖能力显著高于Eca-109细胞(P<0.05);Eca-109 miR-205过表达细胞与Eca-109细胞的存活率和细胞增殖能力比较差异无统计学意义(P>0.05)。在10 Gy组,Eca-109R细胞、Eca-109 miR-205过表达细胞与Eca-109细胞的存活率和细胞增殖能力比较差异无统计学意义(P>0.05)。在0 Gy组,Eca-109R细胞、Eca-109 miR-205过表达细胞中miR-205的相对表达量显著高于Eca-109细胞(P<0.05)。在4 Gy组,Eca-109R细胞中miR-205的相对表达量显著高于Eca-109细胞(P<0.05)。4 Gy组的Eca-109细胞中miR-205的相对表达量显著高于0 Gy组中Eca-109细胞(P<0.05);4 Gy组的Eca-109R细胞中miR-205的相对表达量显著高于0 Gy组的Eca-109R细胞(P<0.05)。结论miR-205的表达与人食管癌放射治疗抵抗细胞株Eca-109R的放射抗性具有相关性,过表达miR-205可提高食管癌细胞的放射抗性。

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.

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.

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.

丹皮酚体内外抗人食管癌Eca-109细胞增殖及诱导凋亡的作用

目的研究丹皮酚(paeonol,Pae)在体内外对人食管癌细胞Eca-109的抑瘤作用及其对细胞凋亡的影响。方法采用噻唑蓝(MTT)体外试验法和灌胃给药体内抗肿瘤试验。光镜及电镜观察各组的肿瘤组织的形态学变化。应用末端脱氧核苷酸转移酶介导的缺口末端标记(TUNEL)法测定细胞凋亡指数。结果丹皮酚在体外对Eca-109细胞有明显的细胞毒作用,半数抑制浓度(IC50)为0.342mmol·L-1;体内灌胃给予丹皮酚25、50、100和200mg·kg-1对裸鼠移植人食管癌Eca-109的抑制率分别为10.67%、23.54%、27.91%和34.46%;顺铂5mg·kg-1组抑瘤率为58.71%;丹皮酚在100mg·kg-1剂量下与顺铂5mg·kg-1联合用药抑制率为77.91%。光镜下用药组可见较多凋亡的肿瘤细胞。透射电镜下可见肿瘤细胞核染色质浓缩边聚、胞质浓缩、核碎裂以及凋亡小体形成等典型的凋亡表现。用药组凋亡指数较对照组明显增加。结论丹皮酚在体内外具有抑制人食管癌Eca-109细胞增殖及诱导其凋亡作用。

8-Br-cAMP对人食管癌Eca-109细胞生长相关基因表达的影响

目的探讨８－Ｂｒ－ｃＡＭＰ对人Ｅｃａ－１０９细胞与生长相关基因表达的影响。方法体外培育的人食管癌Ｅｃａ－１０９细胞受８－Ｂｒ－ｃＡＭＰ处理后，用原位杂交、免疫组织化学及ＲＮＡ、蛋白质斑点印迹技术研究了与细胞生长相关的几种基因的表达变化。结果８－Ｂｒ－ｃＡＭＰ可减弱ＥＧＦＲ、Ｈ－ｒａｓ、ｃ－ｍｙｃ、突变型ｐ５３等基因的表达，增强野生型ｐ５３基因表达和ｐ２１ＷＡＦ１蛋白的表达。结论８－Ｂｒ－ｃＡＭＰ可通过影响有关信号传递和细胞周期进程基因表达而抑制细胞生长。

8-Br-cAMP和槲皮素对Eca-109细胞凋亡中P38和Caspase-3表达的影响

目的 :探讨 8 Br cAMP和槲皮素对Eca 10 9细胞凋亡中P38、Caspase 3表达的影响。方法 :将贴壁培养的Eca 10 9细胞随机分为 3组 :①对照组 :只加DMEM(Sigma)培养液 (含体积分数 10 %胎牛血清 )培养 4 8h。②Br组 :终浓度为 2× 10 -5mol/L 8 Br cAMP的培养液培养 4 8h。③Q组 :终浓度为 4 3μmol/L槲皮素的培养液培养 4 8h。对以上 3组细胞以TUNEL法染色计数细胞凋亡率。以免疫组化方法观察 3组细胞的P38MAPK IR和Caspase 3 IR反应性。结果 :Br组及Q组细胞凋亡率高于对照组 ;Br组及Q组细胞的P38MAPK IR高于对照组 ;Br组及Q组细胞的Caspase 3 IR亦高于对照组。P38MAPK IR与Caspase 3 IR呈正相关。P均 <0 .0 5。结论 :P38MAPK及Caspase 3参与了 8 Br cAMP及槲皮素诱导的Eca 10

8-Br-cAMP和槲皮素对Eca-109细胞周期及凋亡的影响

目的 :观察 8 Br cAMP和槲皮素 (quercetin)对Eca 10 9细胞周期及凋亡的影响。方法 :将贴壁培养的Eca 10 9细胞随机分成 3组 ,Br组 :加 8 Br cAMP至终浓度为 2× 10 5mol/L ;Q组 :加槲皮素至终浓度为 4 3μmol/L ;C组 :不加任何药物 ,只加入新培养液培养。 3组在同等条件下继续培养 4 8h。采用流式细胞仪检测细胞的周期 ,采用TUNEL法检测细胞凋亡百分率 ,采用DNA琼脂糖凝胶电泳法观察细胞DNA降解情况。结果 :2实验组细胞中G2 M期细胞比例较对照组显著上升 (P <0 .0 1)。细胞凋亡百分率 :2实验组显著高于对照组 (P <0 .0 1) ;Br组和Q组相比 ,差异无统计学意义 (P >0 .0 5 )。DNA琼脂糖凝胶电泳中Br组和Q组皆呈DNA“梯样型”带 ,对照组未呈现DNA降解。结论 :8 Br cAMP和槲皮素皆可阻滞Eca 10 9细胞于G2 M期 ,并进一步诱导Eca 10 9细胞凋亡。

α-细辛醚对食管癌Eca-109细胞线粒体凋亡通路的影响

目的探讨α-细辛醚对人食管癌Eca-109细胞线粒体凋亡通路Cyt-c、Smac及Caspase3 mRNA和蛋白表达水平的影响。方法体外培养的人食管癌Eca-109细胞设为阴性对照组和α-细辛醚组,α-细辛醚终浓度分别为25,50,100μg·m L^(-1),培养48 h后使用荧光倒置显微镜观察细胞凋亡形态改变,采用TRIzol法提取细胞总RNA,实时荧光定量聚合酶链反应检测细胞Cyt-c、Smac及Caspase3 mRNA的表达,Western blotting检测其蛋白表达,选取β-actin进行相对定量分析。结果α-细辛醚组细胞形态发生明显凋亡改变;与阴性对照组比较,α-细辛醚组细胞Cyt-c、Smac及Caspase3mRNA和蛋白的表达量均明显增加(P<0.05)。结论α-细辛醚可通过调节线粒体凋亡途径相关基因Cyt-c、Smac及Caspase3的表达增加诱导Eca-109细胞凋亡。