Fas基因转导胃癌细胞的表达

目的将Ｆａｓ基因导入胃癌细胞，建立Ｆａｓ基因表达株，并比较转导前后ｍＲＮＡ与蛋白的表达水平．方法采用分子克隆技术将Ｆａｓ基因插入真核表达载体ｐＢＫＣＭＶ的多克隆克隆位点之间，以脂质体介导法将目的基因导入受体细胞ＳＧＣ７９０１，用Ｇ４１８筛选克隆细胞；以Ｓｏｕｔｈｅｒｎｂｌｏｔ，Ｎｏｒｔｈｅｒｎｂｌｏｔ，Ｗｅｓｔｅｒｎｂｌｏｔ检测Ｆａｓ基因的表达．结果成功地构建了真核表达载体ｐＢＫＦａｓｃＤＮＡ．转导细胞后，从１×１０５细胞中筛选出１００个抗性克隆以上，转导率大于０１％，随机挑选２个克隆扩增培养，获得了１株稳定的抗性细胞，从而有效地建立了Ｆａｓ基因表达株（ＳＧＣ７９０１Ｆａｓｃｅｌｓ）．杂交结果表明，转导株与非转导株均有ｃＤＮＡ的表达，但转导株在ｍＲＮＡ及蛋白水平的表达均明显高于非转导株．结论Ｆａｓ基因在胃癌细胞中处于低表达状态；通过真核表达载体的介导，Ｆａｓ基因导入胃癌细胞后，能有效地表达ＦａｓｍＲＮＡ及其蛋白．     

肝癌凋亡相关抗原的表达与原位末端标记的关系

目的探讨Ｆａｓ等凋亡相关抗原在肝细胞癌（ＨＣＣ）的表达及其与凋亡的关系．方法剖腹ＨＣＣ３０例，标本作Ｆａｓ，Ｂａｘ，Ｉｃｅ，Ｂｃｌ２免疫组化和原位末端标记（ＩＳＥＬ）．结果ＩＳＥＬ与ＨＥ的凋亡形态及定位基本吻合，ＨＣＣ有小片及大片的凋亡；凋亡与坏死形态不同，且坏死ＩＳＥＬ阴性，可与凋亡鉴别．凋亡及健全癌细胞Ｆａｓ，Ｂａｘ阳性率均较高．癌旁及正常肝的Ｆａｓ，Ｂａｘ均较ＨＣＣ者低．Ｂｃｌ２在ＨＣＣ表达甚低．结论凋亡的ＨＣＣ组织Ｆａｓ表达高，较健全癌细胞、癌旁及正常肝组织的表达为高     

C-myc,Bcl-2与胃癌生物学行为和细胞凋亡

目的探讨癌基因Ｂｃｌ２，Ｃｍｙｃ的表达变化与胃癌生物学行为和细胞凋亡的关系．方法采用免疫组化ＬＳＡＢ法，检测６０例原发性胃癌组织（男３８例，女２２例，年龄３７岁～７５岁）癌基因Ｂｃｌ２，Ｃｍｙｃ蛋白的表达变化；在普通光学显微镜下对受检组织的ＨＥ片进行形态学测量和凋亡细胞计数．结果受检组织６０例中，Ｃｍｙｃ阳性表达３７例（６２％），其表达与分化程度和临床分期呈显著性相关，且Ｃｍｙｃ阳性组织细胞凋亡指数（０７±０３）明显高于阴性组织（０３±０２）；所检标本中，Ｂｃｌ２阳性表达率为６８％（４１／６０），其中高分化胃癌的阳性表达率明显高于低分化胃癌（３２％ｖｓ９％）（Ｐ＜００５），阳性Ｂｃｌ２组织与阴性Ｂｃｌ２组织比较，前者凋亡指数明显低于后者（０４±０３ｖｓ０９±０５）（Ｐ＜００５）．结论Ｃｍｙｃ与Ｂｃｌ２基因的异常表达是胃癌生物学行为的重要影响因素，二者在胃癌形成过程中均起着一定的作用，并对细胞增生与凋亡有重要调节作用．     

一氧化氮对血管平滑肌细胞中Bcl-2、Bax、P53和Fas蛋白表达的影响

一氧化氨能抑制血管平滑肌细胞增殖和诱导其调亡。为深入了解一氧化氨对血管平滑肌细胞的生物学效应及其作用机制。本实验应用ＡＣＡＳ５７０共聚焦激光扫描显微镜系统，通过荧光免疫细胞化学方法，对一氧化氮作用下血管平滑肌细胞中调亡相关蛋白Ｂｃｌ－２、Ｂａｘ、Ｐ５３及Ｆａｓ的表达进行了定量检测。结果发现，一氧化氮能使血管平滑肌细胞中Ｂｃｌ－２表达降低，而使Ｂａｘ、Ｐ５３和Ｆａｓ表达升高。这些结果进一步证明了一氧化氮能诱导血管平滑肌细胞凋亡。同时，也说明Ｂｃｌ－２、Ｂａｘ、Ｐ５３和Ｆａｓ可能参与一氧化氨诱导的血管平滑肌细胞增殖抑制及调亡发生。     

病毒性肝炎患者肝组织中bcl-2蛋白的表达

目的探讨抗凋亡基因ｂｃｌ－２蛋白与Ｆａｓ抗原在病毒性肝炎肝组织中表达和分布的关系。方法采用免疫组织化学双标记技术，以ｂｃｌ－２癌蛋白单克隆抗体、抗－ＨＢｓ单克隆抗体及抗－Ｆａｓ多克隆抗体，检测８７例急、慢性肝炎患者肝组织中ｂｃｌ－２、Ｆａｓ及ＨＢｓＡｇ的表达和分布。结果６２例（７１．３％）肝细胞中检出ｂｃｌ－２癌蛋白，阳性物质主要表达于肝细胞胞浆内，少数位于核膜。在急性轻型肝炎，阳性细胞于小叶内弥散分布；在慢性肝炎则多聚集在碎屑样坏死周围。Ｆａｓ抗原的检出率为７５．９％（６６／８７），其阳性细胞的分布类同ｂｃｌ－２阳性肝细胞，但不如后者广泛。ｂｃｌ－２／Ｆａｓ双标记染色显示较多的肝细胞有两种抗原的双表达。结论乙型病毒性肝炎肝组织中ｂｃｌ－２的表达和分布与Ｆａｓ抗原密切相关，ｂｃｌ－２原癌基因可能具有抑制Ｆａｓ介导肝细胞凋亡的作用。     

重组反义c-myc 腺病毒对人胃癌细胞的体内及体外分子治疗

目的研究重组反义ｃｍｙｃ腺病毒对胃癌细胞的体内外生物学作用．方法采用ＬａｃＺ基因Ｘｇａｌ染色、ＭＴＴ,ＤＮＡ梯度降解试验、原位末端标记、流式细胞仪、ＰＣＲ分析、裸鼠致瘤性、裸鼠皮下移植瘤模型实验等方法,对反义ｃｍｙｃ重组腺病毒在人胃癌ＳＧＣ７９０１细胞系中的作用进行体内外研究．结果ＡｄＡＳｃｍｙｃ对ＳＧＣ７９０１细胞能产生明显的生长抑制作用,ＭＴＴ显示生长抑制率为４４１％．ＤＮＡ梯度降解试验、原位末端标记、流式细胞仪显示ＡｄＡＳｃｍｙｃ诱导了ＳＧＣ７９０１细胞凋亡．经ＡｄＡＳｃｍｙｃ处理的ＳＧＣ７９０１细胞裸鼠致瘤性消失．ＡｄＡＳｃｍｙｃ对裸鼠皮下移植瘤模型瘤内注射能有效降低肿瘤的生长速度,生长抑制率为６８９％．结论ＡｄＡＳｃｍｙｃ对胃癌细胞具有显著的体内外生长抑制及凋亡诱导作用     

奥曲肽和表皮生长因子受体单克隆抗体诱导人胃癌细胞凋亡

目的：定量检测奥曲肽（ＳＭＳ）和表皮生长因子受体单克隆抗体（ＥＧＦＲＭＣＡｂ）对人胃癌细胞系 ＳＧＣ－７９０１的诱 导凋亡作用。方法：将不同浓度的ＳＭＳ和ＥＧＦＲＭｃＡｂ与胃癌细胞共同孵育，用流式细胞术分析其细胞凋亡情况。 结果：ＳＭＳ ５ × １０－５和ＥＧＦＲＭｃＡｂ１：１００与胃癌细胞共同孵育７２ ｈ，胃癌细胞凋亡率分别为７．９６％和７．４９％，与对 照组（１．１９％湘比，有显著差异ｐ＜０．０５）。结论：诱导细胞凋亡是胃肠肽类激素发挥其抗肿瘤作用的重要途径之一。     

凋亡相关基因在非小细胞肺癌组织中表达的研究

目的　探讨ｂｃｌ２ 、ｂａｘ、Ｆａｓ、ＦａｓＬ凋亡相关基因在非小细胞肺癌中表达及与肿瘤临床病理学的关系。方法　采用免疫组织化学方法检测４５ 例非小细胞肺癌中ｂｃｌ２、ｂａｘ、Ｆａｓ 和ＦａｓＬ的表达。结果　２３ 例（５１ ％）ｂｃｌ２ 阳性,３８ 例（８４％ ）ｂａｘ 阳性（ Ｐ＜ ０－０１） ,二者之间表达无明显关系,但Ｆａｓ 与ＦａｓＬ之间表达呈正相关（Ｐ＜０－０１） 。ｂｃｌ２ 蛋白表达率随肿瘤期别进展而降低（ Ｐ＜ ０－０５） ,ｂａｘ 蛋白在低分化癌中表达减少（Ｐ＜０－０５） ,ＦａｓＬ在肺腺癌细胞中表达较高（Ｐ＜ ０－０１） 。ｂｃｌ２ 和ｂａｘ 蛋白同时表达阳性与肺癌ＴＮＭ 分期显著相关（Ｐ＜０－０５） ,ｂｃｌ２ 蛋白单一表达与细胞分化有关（ Ｐ＝０－０３３）。结论ｂｃｌ２、ｂａｘ、Ｆａｓ 和ＦａｓＬ可能通过不同途径参与了非小细胞肺癌组织中细胞凋亡的调节,并在肿瘤的发生与发展中发挥重要作用。     

顺铂诱导人胃癌SGC-7901细胞

目的探讨顺铂对胃癌（ＳＧＣ７９０１）细胞凋亡的诱导作用，以揭示顺铂治疗胃癌的作用机制．方法选用不同剂量顺铂与人胃癌细胞系ＳＧＣ７９０１共同孵育不同时间后，应用光镜、电镜进行细胞形态学观察；细胞ＤＮＡ经特异性荧光染色后，用流式细胞仪分析细胞周期变化．结果细胞经顺铂处理后浓缩、深染、致密的染色质沿核膜下凝集、有凋亡小体形成．细胞周期分析Ｇ１期峰前出现典型的细胞凋亡峰，以２５ｍｇ／Ｌ顺铂作用２４ｈ，５０ｍｇ／Ｌ作用１６ｈ为例，定量分析凋亡细胞发生率分别为９３％和１４９％．结论顺铂可通过诱导人胃癌细胞系ＳＧＣ７９０１发生细胞凋亡达到消灭肿瘤细胞的目的．     

肝细胞癌P53，Bcl-2蛋白的表达和细胞凋亡

目的探讨肝细胞癌（ＨＣＣ）中细胞凋亡情况及其与Ｐ５３和Ｂｃｌ２蛋白表达的关系．方法细胞凋亡采用原位细胞凋亡检测法Ｐ５３和Ｂｃｌ２蛋白表达采用免疫组化方法．细胞凋亡与Ｐ５３，Ｂｃｌ２蛋白表达的关系采用双标记法进行检测．结果ＨＣＣ７０例，癌组织和癌周组织中细胞凋亡指数（１０００个细胞中）分别为３６±２０和１０６±３６．Ｂｃｌ２和突变型Ｐ５３蛋白检出率分别为２２９％和４２９％．Ｂｃｌ２主要表达在癌周组织中，抑制肝细胞凋亡；而Ｐ５３则仅表达在癌组织，抑制癌细胞凋亡．双染色显示细胞凋亡与Ｐ５３或Ｂｃｌ２不同时在一个细胞中表达．结论ＨＣＣ癌细胞凋亡减弱．突变型Ｐ５３蛋白是癌细胞凋亡减弱的主要原因，而Ｂｃｌ２则可能在维持ＨＣＣ的肝脏功能方面具有重要作用．     

Transduction of Fas gene or Bcl-2 antisense RNA sensitizes cultured drug resistant gastric cancer cells to chemotherapeutic drugs

ＩＮＴＲＯＤＵＣＴＩＯＮＣｈｅｍｏｔｈｅｒａｐｙｉｓｏｎｅｏｆｔｈｅｍａｊｏｒｍｅｔｈｏｄｓｉｎｔｕｍｏｒｔｒｅａｔｍｅｎｔ,ｂｕｔｉｔｏｆｔｅｎｄｏｅｓｎｏｔｗｏｒｋｄｕｅｔｏｍｕｌｔｉｄｒｕｇｒｅｓｉｓｔａｎｃｅ（ＭＤＲ）．Ｒｅｃｅｎｔｓｔｕｄｉ...     

Anti‐cancer activity of anti‐p185HER‐2 ricin A chain immunotoxin on gastric cancer cells

Background and Aim: Overexpression of the human epidermal growth factor receptor 2 (HER‐2) protein has been detected in gastric cancer and has been associated with an unfavorable prognosis. We investigated the anti‐cancer effects of anti‐p185^HER‐2 ricin A chain (RTA) immunotoxin, alone or in combination with 5‐flurouracil on SGC7901‐HER‐2+ cells. Methods: SGC7901‐HER‐2+ cells were obtained by transfecting SGC7901 cells with HER‐2‐pcDNA3.1. Anti‐p185^HER‐2‐RTA was prepared by chemical conjugation of anti‐HER‐2 monoclonal antibody (mAb) and RTA. The SGC7901‐HER‐2+ cells were incubated with RTA, anti‐p185^HER‐2‐RTA, and/or 5‐flurouracil. The effects of drugs on cells were evaluated by MTT assay and Annexin V‐fluorescein isothiocyanate and propidium iodide double staining flow cytometry. The expression of caspase‐3, caspase‐9, cyclooxygenase‐2, and nuclear factor‐κB/p65 were assayed by western blot. SGC7901‐HER‐2+ cells were transplanted into BALB/c nude mice to produce solid tumors in an attempt to study the immunotoxin activity in vivo. Results: In vitro, anti‐p185^HER‐2‐RTA inhibited cell growth and induced apoptosis in SGC7901‐HER‐2+ cells. Anti‐p185^HER‐2‐RTA enhanced caspase‐3 and caspase‐9 activity, while downregulating the expression of cyclooxygenase‐2 and nuclear factor‐κB/p65. Its combination with 5‐flurouracil further inhibited the growth of SGC7901‐HER‐2+ cells. In vivo, our data showed that anti‐p185^HER‐2‐RTA significantly inhibited the growth of SGC7901‐HER‐2+ cells‐transplanted tumors. Conclusions: Anti‐p185^HER‐2‐RTA inhibits the growth of SGC7901‐HER‐2+ cells. The effect may be related to the activation of caspase‐3 and caspase‐9 and inhibition of cyclooxygenase‐2 and nuclear factor‐κB/p65. Anti‐p185^HER‐2‐RTA plus 5‐FU enhance anti‐cancer activity, suggesting useful clues for further study for the treatment of HER‐2 positive gastric cancers.     

Effect of parthenolide on proliferation and apoptosis in gastric cancer cell line SGC7901

OBJECTIVE: To investigate the effect of parthenolide (PAR) on proliferation and apoptosis in gastric cancer cell line SGC7901. METHODS: Human gastric cancer cell line SGC7901 cells were incubated with various concentration of PAR. After various periods of incubation, the proliferation of SGC7901 cells was assessed by 3‐(4,5‐Dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium bromide methyl thiazolyl tetrazolium (MTT) assay. Apoptosis was measured by the annexin V‐fluorescein isothiocyanate fluoresceine isothiocyanate (FITC)/propidium iodide (PI) double labeled staining method and the morphology of the cell was observed under a fluorescent microscope. Mitochondrial potential was measured by flow cytometry after Rhodamine 123 staining. The expressions of cytochrome C and the Bcl‐2 family of proteins, including Bcl‐2, Bax, Bid and tBid were measured by Western blot. Caspase 3 and 8 activities were measured by enzyme‐linked immunosorbent assay. RESULTS: Treatment with PAR induced apoptosis as confirmed by annexin V‐FITC/PI assay. PAR‐induced apoptosis was associated with intracellular events including the decline of mitochondrial potential, increased release of cytochrome C from the mitochondria, decreased expression of Bcl‐2, increased expression of Bax, Bid and tBid and activation of caspase 3 and 8. CONCLUSION: These results suggest that possibly via activation of the mitochondrial pathway, PAR causes mitochondrial damage leading to the release of cytochrome C and by regulating the expression of the Bcl‐2 family of proteins and activating caspases which leads to results in apoptotic cell death in SGC7901 cells. Our results might be helpful in formulating new therapeutic approaches using Chinese herbal medicine.     

Multidrug resistance reversal in human gastric carcinoma cells by neferine

AIIVI: To investigate the reversal effect of neferine on multidrug resistance in human gastric carcinoma cell line. METHODS: Cells of a human gastric cancer cells line, SGC7901, and its vincristine (VCR) -resistant variant, SGC7901/VCR, were cultivated with or without neferine and/or VCR. The cytotoxic effect of VCR was evaluated by the MTT assay. Cell apoptosis induced by VCR was determined by flow cytometry(FCM). The expression of P-glycoprotein (P-gp) and a multidrug-resistance-associated protein (MRP) in cells was examined by immunofluorescence and FCM. RESULTS: Neferine at the concentration from 2.5 μmol/L to 10 μmol/L had no cytotoxicity to SGC7901 cells, and its variant SGC7901/VCR cells. The ICso of VCR against SGC7901 and SGC7901/VCR cells was 0.059 μg/mL and 2.32 μg/mL, respectively, indicating that SGC7901/VCR cells were 39 times more resistant to VCR than its parent SGC7 901 cells. After treatment with neferine at concentrations of 2.5, 5 and 10 μmol/L, the IC50 of VCR to SGC7901/VCR cell line decreased to 0.340, 0.128 and 0.053 μg/mL, respectively,thus, increased the chemosensitivity by 6.8-, 18.1- and 43.8-fold, respectively. SGC7901/VCR cells were apoptosis resistant to VCR. Neferine (2.5, 5 and 10 μmol/L) promoted the VCR-induced apoptosis of SGC7901/VCR cells in a dosedependent manner. The expressions of P-gp and MRP were strongly positive in SGC7901/VCR cells, which were significantly down-regulated after treatment with neferine (10 μmol/L)for 24 h. CONCLUSION: Neferine reverses multidrug resistance of human gastric carcinoma SGC7901/VCR cells, which may be associated with the down-regulations of P-gp and MRP expression in SGC701/VCR cells.     

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。     

Molecular therapy with recombinant antisense c-myc adenovirus for human gastric carcinoma cells in vitro and in vivo

BACKGROUND AND AIMS: This study used a recombinant antisense c-myc adenovirus (Ad-ASc-myc) to evaluate how alterations of c-myc expression in the SGC7901 human gastric carcinoma cells could influence the proliferation, apoptosis and the growth of human gastric tumors in nude mice. METHODS: The human gastric carcinoma cell line, SGC7901, treated with Ad-ASc-myc or adenovirus recombinants carrying LacZ gene (Ad-LacZ) were analyzed by using X-gal stain, MTT, DNA ladder, TUNEL assay, flow cytometric analysis, polymerase chain reaction and western blot in vitro. The tumorigenicity and experimental therapy in nude mice models were assessed in vivo. RESULTS: The Ad-ASc-myc could strongly inhibit cell growth and induce apoptosis in SGC7901 cells. The proliferation of the Ad-ASc-myc-infected SGC7901 cells was reduced by 44.1%. The mechanism of killing gastric carcinoma cells by Ad-ASc-myc was found to be apoptosis, which was detected by the use of a DNA ladder, TUNEL and flow cytometric analysis. Infection of Ad-ASc-myc in nude mice showed that all three mice failed to form tumors from the 7 to 30 day period, compared with injection of Ad-LacZ and parent SGC7901 cells. Experimental therapy on the nude mice bearing subcutaneous tumors of SGC7901 cells showed that intratumor instillation of Ad-ASc-myc inhibited the growth of the tumors. Recombinant antisense c-myc adenovirus-treated tumors were inhibited by 68.9%, compared with tumors injected with Ad-LacZ and control (LacZ and phosphate-buffered saline). CONCLUSION: The expression of Ad-ASc-myc can inhibit growth and induce apoptosis of gastric cancer cells in vitro and in vivo and thus is a potential clinical utility in gene therapy for the treatment of gastric carcinoma.     

EGFR单抗联合GIK细胞治疗胃癌的实验研究

单克隆抗体靶向药物和细胞免疫治疗在恶性肿瘤的治疗中越来越显现出巨大的潜力,但二者联合应用在胃癌治疗中的作用尚未明确。目的：通过体外和体内实验初步探讨表皮生长因子受体（EGFR）单抗（西妥昔单抗）联合细胞因子诱导的杀伤细胞（CIK细胞）对胃癌的治疗作用。方法：经免疫细胞化学方法证实人胃腺癌细胞株SGC7901高表达EGFR后．观察EGFR单抗对CIK细胞与SGC7901细胞结合率的影响。设置EGFR单抗联合CIK细胞组、单纯CIK细胞组和单纯EGFR单抗组,以MTT法检测各组对SGC7901细胞的杀伤率．应用裸鼠移植瘤模型观察各组抑瘤率。结果：EGFR单抗未能显著提高CIK细胞与SGC7901细胞的结合率。EGFR单抗联合CIK细胞对SGC7901细胞的杀伤率和裸鼠移植瘤抑制率显著高于两者单用（P〈0．05）。结论：EGFR单抗与CIK细胞联合对胃癌的疗效较两者单用显著提高．     

Effect of RNA Interference Inhibiting the Expression of the FUBP1 Gene on Biological Function of Gastric Cancer Cell Line SGC7901

Background: The research aimed to observe the effect of gene silencing on the proliferation, migration, cell cycle, apoptosis, and other biological functions of human gastric cancer cells with RNA interference inhibiting the expression of the far upstream element-binding protein 1 (FUBP1) in the gastric cancer cell line SGC7901.Methods: The shRNA lentivirus vector of the target gene FUBP1 was constructed to transfect the gastric cancer cell line SGC7901. The qRT-PCR and western blot assays were used to detect the expression levels of FUBP1 mRNA and protein in the gastric cancer cells. The CCK-8 assay was used to detect the proliferation of gastric cancer cells. The cell scratch assay and the transwell assays were used to detect the migration of gastric cancer cells. Flow cytometry was used to detect cell cycle distribution and apoptosis.Results: The shRNA lentiviral vector of FUBP1 was successfully transfected into the gastric cancer cell line SGC7901, and could effectively reduce the expression of mRNA and protein of FUBP1. The silencing of FUBP1 could inhibit the gastric cancer cell proliferation and affect the distribution of the cell cycle, resulting in S-phase arrest and cell growth inhibition. However, FUBP1 silencing has no significant effect on cell apoptosis and migration.Conclusions: The expression of FUBP1 can be inhibited specifically and effectively by RNA interference technology, which can significantly affect the biological function of the gastric cancer cell line SGC7901.     

The therapeutic effects of recombinant adenovirus RA538 on human gastric carcinoma cells in vitro and in vivo

AIM:To evaluate the potential of RA-538 gene therapy for gastric carcinoma.METHODS:Human gastric carcinoma cell line SGC7901 treated with Ad-RA538 or Ad-LacZ were analysed by X-gal stain, MTT, DNA ladder, Tunel, flow cytometric analysis, PCR, and Western Blot in vitro. The tumorigenicity and experimental therapy in nude mice model were assessed in vivo.RESULTS:Ad-LacZ could efficiently transfer the LacZ gene into SGC7901 cells. X-gal-positive cells at MOI 25, 50, 100, and 200 were 90%, 100%, 100%, and 100% respectively. Ad-RA538 could strongly inhibit cell growth and induced apoptosis in SGC7901 cells.The proliferation of the Ad-RA538-infected SGC7901 cells was reduced by 76.3%.The mechanism of killing of gastric carcinoma cells by Ad-RA538 was found to be apoptosis by DNA ladder,Tunel and flow cytometric analysis.The tumorigenicity in nude mice using Ad-RA538 showed that all three mice failed to form tumor from 7 to 30 days compared with Ad-LacZ and parent SGC7901 cells. Experimental therapy on the nude mice model bearing subcutaneous tumor of SGC7901 cells showed that intratumor instillation of Ad-RA538 inhibited the growth of the tumors. Ad-RA538-treated tumors were inhibited by 60.66%, compared with that of the tumor injected with Ad-LacZ and mock.CONCLUSION: The expression of Ad RA538 can inhibit growth and induce apoptosis of gastric cancer cell in vitro and in vivo. Ad RA538 can be used potentially in gene therapy for gastric carcinoma.