环氧合酶-2选择性抑制剂NS-398诱导食管癌细胞EC 9706凋亡及其机制的探讨

目的 观察环氧合酶-2(COX-2)选择性抑制剂NS一398对食管癌细胞株EC 9706增殖及凋亡的影响,砌究其对凋亡抑制蛋白Survivin和Caspase-3表达的影响,探讨NS-398诱导Ec 9706细胞凋亡的作用机制.方法 NS-398作用EC 9706细胞后,MTT法测定NS-398对人食管癌EC 9706细胞增殖的抑制率;DNA片段分析法和流式细胞仪检测细胞凋亡;免疫细胞化学检测Survivin和Caspase-3蛋白表达变化.结果 NS-398(10～100μmol/L)对EC 9706细胞生长有抑制作用,随浓度升高、时间延长抑制作用增强,并诱导EC 9706细胞凋亡,呈剂量-时间效应关系;NS-398可降佴Survivin蛋白表达,增加Caspase-3蛋白表达.结论 NS-398可诱导人食管癌细胞株EC 9706凋亡,其机制可能与下调Survivin表达及激活Capase-3表达有关.     

NS-398对人胃癌细胞株增殖及COX-2表达的影响

目的 体外观察选择性环氧化酶2(COX-2)抑制剂NS-398对人胃癌细胞株SGC7901细胞增殖及COX-2表达的影响。方法 采用噻唑蓝(MTT)法观察NS-398对SGC7901细胞增殖的影响，流式细胞仪(FCM)研究NS-398对SGC790l细胞凋亡的作用．免疫细胞化学观察COX-2蛋白的表达。结果 体外NS-398能减少SGC790l细胞株COX-2的表达．对SGC7901有细胞毒作用．可增加细胞凋亡率。结论 体外NS-398对SGC7901细胞增殖有抑制作用。可能与抑制COX-2表达及诱导细胞凋亡有关。     

环氧合酶抑制剂NS-398抑制食管癌干细胞增强放射敏感性的研究

放射治疗是目前食管癌的主要治疗手段,但疗效欠佳,放射增敏成为肿瘤研究的热点.有研究发现食管癌的放射治疗效果不理想与食管癌干细胞的放射治疗抵抗性、高侵袭转移性有关.到目前为止,尚未发现食管癌干细胞的特异性标志物.本实验选择目前较为常用的侧群( side puplation,SP)细胞分析法[1 ]来研究食管癌干细胞,并检测食管癌Eca-109细胞的存活和生长情况,以明确环氧合酶(COX)抑制剂NS-398对食管癌细胞的放射增敏机制.     

环氧化酶-2选择性抑制剂抑制人食管癌细胞的生长及其诱导凋亡

目的:探讨NS-398对食管癌细胞的生物学效应及可能的作用机制.方法:常规方法培养食管癌Eca-109和TE-13细胞,以不同浓度NS-398(5,10,20,40,80 μmol/L)处理24,48,72 h.采用四甲基唑蓝法(MTT)检测NS-398对Eca-109和TE-13细胞生长的抑制作用;流式细胞仪(FCM)检测细胞凋亡及COX-2,Bcl-2,Bax蛋白的表达;TUNEL法检测2种细胞凋亡情况;用放射免疫分析(RIA)检测培养液上清中前列腺素E2(PGE2)含量.结果:NS-398可抑制2种细胞的生长,并随药物浓度的增高及作用时间的延长抑制率逐渐增高,并使2种细胞产生的PGE2明显降低.NS-398使2种细胞G0/G1期细胞显著增多,S期细胞显著减少(Eca-109:F=22.39,P＜0.01;TE-13:F=46.99,P＜0.01),并引起了明显的细胞凋亡.NS-398使2种细胞COX-2和Bcl-2表达显著减少,而Bax表达显著增高.COX-2和Bcl-2的表达呈显著正相关(Eca-109:r=0.925,P＜0.01;TE-13:r=0.925,P＜0.01),COX-2和Bax表达呈显著负相关(Eca-109:r=-0.937,P＜0.01;TE-13:r=-0.703,P＜0.01)、Bax和bcl-2表达呈显著负相关(Eca-109:r=-0.926,P＜0.01;TE-13:r=-0.753,P＜0.01).结论:NS-398可抑制食管癌细胞的增殖并可诱导其凋亡,应用COX-2选择性抑制剂对食管癌进行化学预防或辅助治疗具有可能性.     

NS-398对HepG2细胞增殖的抑制作用及机制探讨

目的探讨氮-2,环己氧-4,硝基苯—甲基磺胺（NS-398）对肝癌细胞株HepG2细胞的生长抑制作用及其机制。方法分别用100、200、300、400μmol/L的NS-398处理HepG2细胞,用MTT法测算肿瘤细胞抑制率,流式细胞仪检测细胞周期及细胞凋亡率,用免疫组化和Westernblot检测细胞的血管生长因子（VEGF）。结果NS-398呈剂量依赖性的方式抑制HepG2细胞增殖,并诱导其凋亡,随着NS-398浓度增大,S期细胞明显减少,有G1期细胞累积现象,其24h半数有效剂量（IC50）为300μmol/L。NS-398浓度为200μmol/L以上时HepG2细胞VEGF的表达与对照组相比,P〈0.01。结论NS-398对肝癌细胞增殖有抑制作用,并诱导其凋亡,可能与G1阻滞以及VEGF的表达受抑制有关。     

选择性环氧合酶-2抑制剂NS-398抑制胃癌细胞P-糖蛋白表达

目的 探讨选择性环氧合酶-2（COX-2）抑制剂NS-398对胃癌细胞株SGC-7901 P-糖蛋白（P-gp）表达的影响。方法 胃癌细胞株SGC-7901经浓度分别为0、10、100μmol／L的NS-398处理后，酶联免疫吸附试验检测NS-398对胃癌细胞前列腺素E2（PGF2）分泌的影响，24、48h后用RT-PCR检测多药耐药（mdr）1 mRNA表达，48h后用免疫细胞化学染色法检测P-gp表达。结果 NS-398可显著抑制胃癌细胞株SGC-7901 PGE2分泌，并呈浓度依赖性（P〈0．05）。不同浓度NS-398作用于细胞后，胃癌细胞株SGC-7901的mdr1／P-gp表达受不同程度抑制，100μmol／L的NS-398对mdr1 mRNA表达抑制作用强于10μmol／L（P〈0．01）。不同浓度药物与测量时间为交互作用．作用48h与24h相比，NS-398对mdr1 mRNA表达的抑制作用更强（P〈0．01）。结论 NS-398可抑制SGC-7901的mdr1／Pgp表达，且呈剂量效应关系。NS-398可能通过抑制COX-2活性，抑制COX-2下游产物PGE2表达，从而抑制P-gp表达。选择性COX-2抑制削可能有助于减轻肿瘤细胞对化疗药物的耐药性。     

选择性环氧合酶-2抑制剂NS-398对人肝癌细胞株HepG2增殖和凋亡的影响

目的探讨选择性环氧合酶-2抑制剂NS-398对人肝癌HepG2细胞株的生长抑制、诱导凋亡及其对bcl-2表达的影响。方法采用MTT法检测细胞增殖，流式细胞术检测细胞周期、凋亡及凋亡相关蛋白bcl-2的表达。结果NS-398抑制HepG2的增殖活性，经20、40、80和160μmol／L的NS-398处理细胞48h后，其抑制率分别为6．72％、16．21％、20．86％和25．34％，呈剂量依赖效应关系；细胞经160bLmol／L的NS-398处理24h、48h和72h后，G。／G1期细胞由76．07±0．75％分别减少至62．27±0．74％、59．17±1．47％和53．03±1．60％（P〈0．05），S期细胞由11．40±0．79％分别增加至13．23±0．81％、16．20±1．95％和16．60±1．25％（P〈0．05），G2／M期细胞无明显变化；凋亡细胞增多，凋亡率分别为8．47％、16．3％和23．9％；细胞经160μmol／L的NS-398处理48h后bcl-2蛋白与对照组比，表达下调（P〈0．01）。结论NS-398对人肝癌细胞株HepG2有抑制增殖、诱导凋亡作用，细胞凋亡的机制可能与细胞凋亡相关基因bcl-2表达下调有关。     

环氧合酶-2抑制剂增强食管癌放射敏感性的机制

食管癌是常见的消化系统恶性肿瘤,发病率较高,早期症状不典型,多数患者就诊时已属晚期.放射治疗是重要的晚期食管癌治疗方法.我们的前期研究已证实,食管鳞癌细胞株EC9706高表达环氧合酶-2(COX-2),COX-2选择性抑制剂NS398剂量-效应和时间-效应依赖地增加其放射敏感性[1],但确切机制尚不明确.     

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。     

构建shRNA真核表达质粒抑制CXCR4对人食管癌细胞Eca-109迁移的影响

目的 构建人CXCR4 mRNA的shRNA真核表达载体质粒,特异性抑制人食管癌细胞CXCR4的表达,并筛选抑制效果理想的质粒,研究对食管癌细胞迁移的影响.方法 以人CXCR4 mRNA编码区中3条不同序列作为RNA干扰靶点,分别构建3个shRNA真核表达载体质粒GYJ-1、GYJ-2、GYJ-3,并进行测序.用脂质体转染人食管癌细胞株Eca109,实时定量逆转录-聚合酶链反应（RT-PCR）检测mRNA水平.应用细胞划痕试验研究干扰质粒对食管癌细胞迁移的影响.结果 GYJ-1呈高效特异地抑制人CXCR4的表达;而GYJ-2及GYJ-3抑制效果较GYJ-1差.GYJ-1显著抑制食管癌细胞的迁移.结论 通过构建CXCR4的shRNA真核表达载体导入食管癌细胞,可有效抑制人食管癌细胞中CXCR4的表达,并影响食管癌细胞的迁移.     

Sunitinib modulates the radiosensitivity of esophageal squamous cell carcinoma cells in vitro

This study aims to explore the radiosensitivity of sunitinib on esophageal cancer cell lines. For in vitro studies, human esophageal squamous cell carcinoma (ESCC) cell lines were treated with sunitinib 24 hours before irradiation. ESCC cell lines were treated with sunitinib with or without radiation. Cell proliferation was detected by Cell Counting Kit 8 assay. Radiosensitization was evaluated by clonogenic survival assay. Cell apoptosis and cell cycle analysis were detected by flow cytometry. Deoxyribonucleic acid (DNA) double‐strand breaks were performed by immunocytofluorescence analysis. Western blot analysis was used to determine the effect of sunitinib on radiation induced signal transduction. Sunitinib potently sensitized ESCC cells to radiation with a sensitization enhancement ratio of 1.13–1.72. Furthermore, sunitinib increased radiation induced DNA double‐strand breaks, promoted the apoptosis of ESCC cells and induced the G2/M arrest. Radiosensitization was accompanied with enhanced apoptosis and regulated by the intrinsic pathway of apoptosis. Sunitinib sensitized ESCC cells to the cytotoxic effects of radiation. This compound is promising for future clinical trials with chemoradiation in esophageal cancer.     

JNK MAPK信号通路在食管癌细胞系Eca-109细胞中的作用机制

目的探讨c-jun氨基末端激酶1/2（c-jun N-teuninal kinase,JNK 1/2）信号通路在食管癌细胞系Eca-109细胞中的作用。方法体外培养Eca-109细胞,以特异性JNK信号转导通路抑制剂SP600125处理Eca-109细胞;RT-PCR的方法检测JNK1和JNK2基因的表达,Western blot法检测JNK和p-JNK蛋白的表达,MTT（3-（4,5-Dimethylthiazol-2-yl）-2,5-di-phenyltetrazolium bromide）法检测细胞增殖,流式细胞术检测细胞凋亡。结果 Eca-109细胞经SP600125分别处理24h和48 h后,分别与对照组比较,JNK1 mRNA的表达无统计学差异（均P〉0.05）,JNK2 mRNA的表达也无统计学差异（均P〉0.05）,但活化的JNK即P-JNK1/2蛋白的表达显著减少,细胞的增殖显著被抑制,细胞的凋亡率有统计学差异（均P〈0.05）。结论 JNK信号通路可能在Eca-109细胞的发生发展中发挥重要作用。     

Identification of candidate genes involved in the radiosensitivity of esophageal cancer cells by microarray analysis

SUMMARY.  Radiotherapy plays a key role in the control of tumor growth in esophageal cancer patients. To identify the patients who will benefit most from radiation therapy, it is important to know the genes that are involved in the radiosensitivity of esophageal cancer cells. Hence, we examined the global gene expression in radiosensitive and radioresistant esophageal squamous cell carcinoma cell lines. Radiosensitivities of 13 esophageal cancer cell lines were measured. RNA was extracted from each esophageal cancer cell line and a normal esophageal epithelial cell line, and the global gene expression profiles were analyzed using a 34 594-spot oligonucleotide microarray. In the clonogenic assay, one cell line (TE-11) was identified to be highly sensitive to radiation, while the other cell lines were found to be relatively radioresistant. We identified 71 candidate genes that were differentially expressed in TE-11 by microarray analysis. The up-regulated genes included CABPR, FABP5, DSC2, GPX2, NME, CBR3, DOCK8, and ABCC5, while the down-regulated genes included RPA1, LDOC1, NDN, and SKP1A. Our investigation provided comprehensive information on genes related to radiosensitivity of esophageal cancer cells; this information can serve as a basis for further functional studies.     

Influence on radiosensitivity of lung glandular cancer cells when ERCC1 gene silenced by targeted siRNA

Objective:To identify the influence on radiosensitivity of lung glandular cancer cells when excisions repair cross-complementing group1(ERCC1) gene was silenced by targeted siR NA.Methods:siR NA which targeting to ERCC1 and control siR NA was designed and synthesized.The human lung glandular cancer SPC-A-1 cells was transfected.A total of 56 nude mice were divided into two groups,and two kinds of SPC-A-1 cells were transplanted to armpit of right forelimb,to establish the nude mice subcutaneous xenotransplanted tumor model of human lung glandular cancer cells.After the tumor was developed,the nude mice were randomly divided into four groups and accepted different doses of X-Ray radiation,then the change of tumor volume,survival time of mice in every group were recorded and the average lifetime was calculated.Twenty-one days later of X-ray experiment,two mice were taken and sacrificed in each group and the tumors organizations were stripped.The cell apoptosis rate and cell cycle distributions were obtained by FCM(flow cytometry).Results:The volume of tumor which ERCC1 gene was silenced was less than single irradiation group after X-ray irradiation,and the growth speed was slower and the lifetime of mice was lengthened as well(P0.05).The cells apoptosis rate and the rate of G2/M cells which ERCC1 gene was silenced were higher than the same dose control group and the rate of G_1 cells were lower,which indicated that the cells could be stopped at G_2/M point,the cell proliferation was inhibited,the cell apoptosis was promoted and the radiation sensitivity was improved after the ERCC1 was silenced.Conclusions:The radiation sensitivity of lung glandular tumor could be improved after the ERCC1 gene was silenced by siR NA.     

^18F-FETNIM在食管癌ECa109细胞乏氧监测中的应用

目的探讨乏氧显像剂^18F-氟赤式硝基咪唑（^18F—FETNIM）在食管癌细胞ECa109乏氧监测中的应用价值。方法传代至2～3代的ECa109细胞,常氧环境下分别予以0、2、4、6、8Gyx线照射,加入等量”F．FETNIM显像剂后分别于5、30、60、120、180min用γ井型测量仪测定其放射性计数,计算摄取率。结果^18F—FETNIM在ECa100细胞中的摄取,0Gy组细胞的摄取率随时间延长而增高,180min达最高,其余各组细胞随照射剂量增加,摄取率峰值逐渐前移,且峰值均高于0Gy组。结论^18F—FETNIM可用于食管癌细胞乏氧情况监测,为临床优化化疗方案提供依据。     

Value of long non-coding RNA Rpph1 in esophageal cancer and its effect on cancer cell sensitivity to radiotherapy

BACKGROUND Esophageal cancer is a common digestive tract tumor that is generally treated with radiotherapy. Poor responses to radiotherapy in most patients generally result in local radiotherapy failure, so it is essential to find new radiosensitizers that can enhance the response of cancer cells to radiotherapy and improve the survival of esophageal cancer patients with radiation resistance. The long noncoding RNA(lnc RNA) Rpph1 is highly expressed in human gastric cancer tissues, and represses breast cancer cell proliferation and tumorigenesis.However, the expression of lnc RNA Rpph1 in esophageal cancer and its relationship with radio-sensitivity has not been studied.AIM To explore the value of lnc RNA Rpph1 in esophageal cancer and its effect on cancer cell sensitivity to radiotherapy.METHODS Eighty-three patients with esophageal cancer admitted to Qilu Hospital of Shandong University and 90 healthy participants who received physical examinations were collected as research participants. The expression of Rpph1 was determined by q RT-PCR. si RNA-NC and si RNA-Rpph1 were transfected into esophageal cancer cell lines, and cells without transfection were designated as the blank control group. Cell survival was tested by colony formation assays,and the levels of proteins related to apoptosis and epithelial-mesenchymal transitions were determined by Western blot assays. Cell proliferation was assessed by MTT assays, cell apoptosis by flow cytometry, and cell migration by wound-healing assays. Changes in cell cycle distribution were monitored.RESULTSRpph1 was highly expressed in esophageal carcinoma, making it a promising marker for the diagnosis of esophageal cancer. Rpph1 could also be used to distinguish different short-term responses, T stages, N stages, and clinical stages of esophageal cancer patients. The results of 3-year overall survival favored patients with lower Rpph1 expression over patients with higher Rpph1 expression(P 0.05). In vitro and in vivo experiments showed that silencing Rpph1 expression led to higher sensitivity of esophageal cancer cells to radiotherapy, stronger apoptosis in esophageal cancer cells induced by radiotherapy, higher expression of Bax and caspase-3, and lower expression of Bcl-2(Bax, caspase-3, and Bcl-2 are apoptosis-related proteins). Additionally,silencing Rpph1 attenuated radiation-induced G2/M phase arrest, and significantly inhibited the expression of proteins involved in cell proliferation,migration, and epithelial-mesenchymal transition regulation in esophageal cancer cells.CONCLUSION Rpph1 is highly expressed in esophageal cancer. Silencing Rpph1 expression can promote cell apoptosis, inhibit cell proliferation and migration, and increase radio-sensitivity.     

人胃癌细胞株MGC-803侧群细胞的分选与生物学特征

目的 从人胃癌细胞株MGC-803中分离侧群(SP)细胞,研究其生物学特征.方法 利用流式细胞分选术(FACS)从MGC-803细胞株中分选出SP细胞和非SP细胞亚群进行培养,采用克隆形成实验比较两组亚群细胞的体外增殖能力,NOD/SCID鼠成瘤实验检测两组亚群细胞体内成瘤能力.结果 FACS结果显示,细胞株MGC-803中SP细胞亚群占总细胞的0.3％ ～ 1.2％;SP细胞体外克隆形成率为(0.862±0.050)％,非SP细胞体外克隆形成率为(0.325 ±0.207)％,两者比较P＜0.05;SP细胞最低成瘤数量是1×103/只,非SP细胞为5×103/只.结论 人胃癌细胞株MGC-803中存在SP细胞,其生物学特性与干细胞基本符合.     

rshCD_（40）L、IFN-γ对食管癌Eca109、Eca9706、TE13细胞增殖和凋亡的影响

目的观察可溶性重组人CD40L（rshCD40L）、IFN-γ对食管癌Eca109、Eca 9706、TE13细胞增殖和凋亡的影响。方法取正常培养的食管鳞癌细胞株Eca109、Eca 9706、TE13,分别用PBS、100 U/ml IFN-γ、100 ng/ml rsh-CD40L、100 U/ml IFN-γ＋100 ng/ml rshCD40L培养,分别为A、B、C、D组。用MTT法测算各组细胞增殖抑制率,用TUNEL法检测细胞凋亡率。结果 C组Eca109、Eca9706、TE13细胞增殖抑制率分别为40.6%±4.2%、31.5%±5.7%、44.6%±6.7%,明显高于A、B组（P均〈0.05）;D组分别为56.7%±4.9%、41.2%±6.2%、51.6%±5.2%,均高于C组（P均〈0.05）。C组Eca109、Eca9706、TE13细胞凋亡率分别为33.6%±3.7%、30.5%±2.8%和37.6%±4.9%,明显高于A、B组（P均〈0.05）;D组分别为43.7%±4.7%、34.2%±5.1%、41.5%±5.7%,均高于C组（P均〈0.05）。结论 rshCD40L能促进食管癌Eca109、Eca9706、TE13细胞凋亡,并抑制其增殖。IFN-γ可增强这一作用。     

BAG-1基因沉默对非小细胞肺癌放射敏感性的影响及机制

目的探讨BAG-1基因与非小细胞肺癌放射敏感性的关系,为非小细胞肺癌个体化治疗提供理论依据。方法对A549肺腺癌细胞、H460大细胞癌及NCL-H520鳞癌细胞三株非小细胞肺癌细胞株及人胚肾细胞株HEK293行细胞放射敏感性试验,采用Western blot法检测各细胞株中BAG-1蛋白表达情况。选择其中对放射线相对较抗拒、BAG-1蛋白表达最高的A549细胞株,构建干扰载体pGCsi-BAG-1并筛选BAG-1基因沉默细胞株,用shRNA-2转染,酶标仪检测细胞生长情况,流式细胞仪检测细胞凋亡率,放射敏感性试验观察细胞对放射线的敏感性。结果 shRNA-2转染的细胞株生长受到抑制,且随时间延长抑制作用明显,而阴性对照质粒转染的A549细胞株生长无明显变化;6 Gy射线照射后24 h,shRNA-2转染细胞凋亡率为(49.6±4.23)%,未转染的A549细胞为(15.3±2.11)%,阴性对照质粒转染细胞为(14.8±3.55)%,shRNA-2转染细胞凋亡率较未转染细胞增加了3.2倍(P<0.01),而阴性对照转染细胞与未转染细胞间相比差异无统计学意义;亲本A549细胞和阴性对照转染细胞之间的放射敏感性无差异(P>0.05)。而shRNA-2转染细胞的放射敏感性明显增加,与前二者比较差异有显著性(P<0.05)。结论 BAG-1基因沉默可增强非小细胞肺癌放射敏感性,可能机制为BAG-1基因沉默后抑制细胞生长,抗凋亡作用减弱,细胞内BAG-1分布发生改变,细胞对射线更敏感。     

Brucea javanica oil emulsion improves the effect of radiotherapy on esophageal cancer cells by inhibiting cyclin D1-CDK4/6 axis

BACKGROUND Esophageal cancer is one of the most common cancers around the world, and it has high incidence and mortality rates. The conventional therapy for esophageal cancer is radiotherapy, although its effect is highly limited by the resistance of esophageal cancer cells. Thus, strong radiosensitizers can be very crucial during radiotherapy against esophageal cancer. Brucea javanica oil emulsion (BJOE) is a widely used drug against various cancers, such as liver, colon, and ovarian cancer. However, its anti-cancer effect and mechanism and the use of BJOE as a radiosensitizer have not been explored in esophageal cancer. AIM To evaluate the anti-cancer effect and mechanism of BJOE and explore the potential use of BJOE as a radiosensitizer during radiotherapy. METHODS The inhibitory effect of BJOE and its enhancement function with radiation on cell viability were examined with the calculated half-maximal effective concentration and half-maximal lethal concentration. The influence of BJOE on cell migration and invasion were measured with EC109 and JAR cells by wound-healing and transwell assay. Clonogenesis and apoptotic rate, which was measured by Hoechst staining, were investigated to confirm its enhancement function with radiation. To investigate the molecular pathway underlying the effect of BJOE, the expressions of several apoptosis- and cycle-related proteins was detected by western blotting.cell lines more than normal cell lines, and it markedly reduced migration and invasion in esophageal cancer cells (EC109 and JAR). Moreover, it promoted cell apoptosis and enhanced the effect of radiotherapy against esophageal cancerous cells. In the viability test, the values of half-maximal effective concentration and half-maximal lethal concentration were reduced. Compared to the control, only around 1/5 colonies formed when using BJOE and radiation together in the clonogenic assay. The apoptotic rate in EC109 was obviously promoted when BJOE was added during radiotherapy. Our study suggests that the expression of the apoptosis-proteins Bax and p21 were increased, while the expression of Bcl-2 was stable. Further detection of downstream proteins revealed that the expression of cyclin D1 and cyclin-dependent kinase 4/6 were significantly decreased. CONCLUSION BJOE has a strong anti-cancer effect on esophageal cancer and can be used as a radiosensitizer to promote apoptosis in cancerous esophageal cells via the cyclin D1-cyclin-dependent kinase 4/6 axis.