重组腺病毒Ad—hTERTp—HSV—TK载体的构建及抗肝癌实验研究

目的构建hTERT启动子调控的HSV—TK基因重组腺病毒载体系统,观察Ad—hTERTp—HSV-TK／GCV自杀基因系统对肝癌细胞的杀伤作用。方法将穿梭质粒pSU-Tp-TK与腺病毒骨架质粒pBHGE3共转导至HEK293细胞,利用细胞内同源重组法构建出hTERT启动子调控的携带TK基因的复制缺陷型腺病毒Ad—hTERTp—HSV—TK载体系统;将不同感染复数（MOI=1、10、100、1000）的重组腺病毒Ad—hTERTp—HSV—TK感染肝癌细胞HepG2及正常肝细胞L-02,加入不同浓度的GCV（0、1、10、100、1000ug／ml）,MTT、法检测细胞活性。结果HEK293细胞出现病毒空斑,提取病毒DNA,经PCR鉴定正确后扩增、纯化,滴度为1．5×10^10pfu／ml;MTT法检测到Ad—hTERTp—HSV-TK／GCV能靶向杀死肝癌细胞HepG2,且细胞存活率随着病毒滴度和GCV浓度的增加而降低。结论该实验构建的Ad—hTERTp—HSV—TK载体系统,可靶向抑制肝癌细胞HepG2,而对正常肝细胞L-02几乎无影响。     

miR-888在肝癌细胞中的表达水平及作用机制

目的:检测miR-888在肝癌细胞中的表达情况,并进一步在分子水平研究其相关作用机制。方法:实时荧光定量PCR(qRT-PCR)检测肝癌细胞系中miR-888的表达情况;细胞计数试剂盒-8(cell counting kit-8,CCK-8)法检测miR-888对Huh7细胞活性的影响;平板克隆形成实验、细胞凋亡实验、Transwell实验检测miR-888对Huh7细胞集落形成、细胞凋亡、迁移和侵袭能力的影响;荧光素酶报告检测miR-888与候选基因RB1的靶向关系,qRT-PCR 和免疫印迹实验（Western blotting）检测RB1 mRNA 和pRB蛋白水平的改变。结果:肝癌细胞中miR-888的表达高于正常肝细胞;CCK-8法显示转染miR-888 inhibitors后Huh7细胞在72 h后增殖能力明显低于miR-NC组（P<0.05）;平板克隆形成实验、Transwell实验（迁移和侵袭）显示转染miR-888 inhibitors后Huh7细胞的克隆形成能力、迁移及侵袭能力明显低于miR-NC组（P<0.05）;细胞凋亡实验显示转染miR-888 inhibitors后Huh7细胞的凋亡能力明显高于miR-NC组（P<0.05）;荧光素酶报告实验证实 miR-888可以抑制含有其结合位点的荧光报告基因的活性,而对突变体质粒没有影响。过表达或抑制 miR-888 对 RB1 mRNA 水平无明显影响,但却对其蛋白水平有负性调节作用。结论:miR-888在肝癌细胞中表达升高,可能通过下调RB1表达促进肝癌细胞侵袭和迁移。     

腺病毒介导的p27kip1cDNA对胃癌细胞增殖的影响

目的　研究 p2 7基因对人胃癌细胞SGC 790 1的抗增殖作用。方法　构建重组体腺病毒Ad p2 7kip1并转染SGC 790 1细胞 ,绘制细胞生长曲线 ,克隆形成实验 ,免疫组化检测PCNA的表达情况。 结果　成功构建Ad p2 7kip1 ,病毒滴度为 1 .2 4× 1 0 12 pfu/ml,在MOI≥ 5 0时 ,即可达到 1 0 0 %的转导效率。在SGC 790 1细胞中表达 ,能抑制其生长和集落形成 ,Ad p2 7kip1和对照组PCNA标记指数分别为 3 5 .2 %及78.6% (P <0 .0 1 )。结论　p2 7可有效抑制胃癌细胞的增殖活性 ,这为采用 p2 7kip1cDNA基因治疗胃癌奠定了基础。     

蜂毒素基因重组腺病毒对肝癌细胞的杀伤作用

目的：构建携蜂毒素基因及甲胎蛋白（AFP）启动子（rAFP)的重组腺病毒载体，探讨rAFP驱动的蜂毒素基因在体外对肝癌细胞的特异性杀伤作用。方法：人工合成蜂毒素基因，置于rAFP之后，用细菌内高效同源重组法将目的基因重组入腺病毒质粒中，转染人胚肾293细胞进行腺病毒包装；采用MTT法测定蜂毒素基因转染对AFP阳性，阴性肝癌细胞及正常肝细胞增殖的影响。结果：携蜂毒素基因重组腺病毒载体构建成功，MTT实验证明携蜂毒素基因重组腺病毒转染后，AFP阳性肝癌细胞的增殖受到明显抑制，而对AFP阴性肝癌细胞及正常肝细胞无明显影响；无蜂毒素基因的重组腺病毒转染，则对各种细胞增殖均无抑制作用。结论：表达rAFP驱动的蜂毒素基因的重组腺病毒在体外可特异性地杀伤AFP阳性肝癌细胞。     

腺病毒介导的p27kip1cDNA对胃癌细胞增殖的影响

 目的　研究 p2 7基因对人胃癌细胞SGC 790 1的抗增殖作用。方法　构建重组体腺病毒Ad p2 7kip1并转染SGC 790 1细胞 ,绘制细胞生长曲线 ,克隆形成实验 ,免疫组化检测PCNA的表达情况。 结果　成功构建Ad p2 7kip1 ,病毒滴度为 1 .2 4× 1 0 12 pfu/ml,在MOI≥ 5 0时 ,即可达到 1 0 0 %的转导效率。在SGC 790 1细胞中表达 ,能抑制其生长和集落形成 ,Ad p2 7kip1和对照组PCNA标记指数分别为 3 5 .2 %及78.6% (P <0 .0 1 )。结论　p2 7可有效抑制胃癌细胞的增殖活性 ,这为采用 p2 7kip1cDNA基因治疗胃癌奠定了基础。     

携带mda-7基因的复制缺陷型腺病毒通过促进线粒体释放促凋亡蛋白杀伤肝癌细胞

目的 探讨黑色素瘤分化相关基因7/白介素24(mda-7/IL-24)基因选择性杀伤肝癌细胞的机制.方法 应用携带mda-7基因的复制缺陷型腺病毒Ad.mda-7感染正常肝细胞L02和肝癌细胞HepG2.通过逆转录聚合酶链反应(RT-PCR)、酶联免疫吸附实验(ELISA)及Western blot方法,观察mda-7/IL-24基因的表达;应用Hoeehst染色和流式细胞仪观察mda-7/IL-24对肝癌细胞的杀伤作用;采用RT-PCR和Western blot方法,观察Bcl-2家族和caspase-9基因表达的变化,分离不同感染时点细胞内线粒体和胞浆蛋白,并检测线粒体释放促凋亡蛋白细胞色素C(Cyt-C)和Smac/DIABLO的变化过程.结果 Ad.mda-7能介导mda-7/IL-24在两种细胞株中的高效表达.能选择性杀伤肝癌细胞,感染24 h后,HepG2细胞凋亡率为24.0%±4.6%,而对正常的肝细胞没有影响.RT-PCR和亚细胞蛋白的分析结果显示,胞浆内Bel-2和Bcl-xL的表达在HepG2细胞中明显下降,而在L02细胞中的表达无变化,Bax在肝癌细胞中的表达明显增强,Bak的表达无变化;Ad.mda-7能促进细胞线粒体释放cyt-C和Smac/DIABLO蛋白,并促进caspase-9的表达.结论 Ad.mda-7能选择性杀伤肝癌细胞HepG2,通过促进线粒体促凋亡蛋白的释放而诱导肝癌细胞凋亡.     

腺病毒介导的siRNA下调c-Met表达抑制肝癌细胞生长

 目的 探讨重组腺病毒介导的siRNA技术下调c Met表达对c Met过表达肝癌细胞在体外生长和成瘤性的影响。方法 用重组腺病毒介导的siRNA技术下调c Met的表达；通过Western blot检测蛋白质的表达水平；以MTT法和细胞计数法检测细胞的生长和增殖情况；以流式细胞术检测细胞周期变化情况；以软琼脂克隆形成实验考察细胞的克隆形成能力。结果 重组腺病毒介导的siRNA可使HCCLM3细胞c Met的表达量下调90%以上。下调c Met表达可使HCCLM3细胞生长停留在G1/G0期，增殖速率下降30%以上；下调c Met表达可使HCCLM3细胞克隆形成能力下降约78%（P<0.01）。结论 重组腺病毒介导的siRNA下调c Met表达具潜在的肝癌基因治疗价值。     

MicroRNA-10a通过靶向作用E2F3抑制肝癌细胞的增殖

目的：探讨微小RNA-10a（microRNA-10a,miR-10a）对肝癌细胞增殖的影响及其作用机制。方法：收集广西医科大学附属肿瘤医院肿瘤科2001年10月至2005年7月144例肝癌患者手术切除的肝癌组织和癌旁组织（距癌灶组织边缘2~5 cm）标本,Real-time PCR法分析144例肝癌组织及癌旁组织中miR-10a的表达量。在肝癌细胞（QGY-7701、Huh7、PCL/PRF/5）中转染miR-10a 模拟物,Real-time PCR法检测转染后细胞miR-10a的表达水平;CCK-8法检测过表达miR-10a的肝癌细胞的增殖水平,流式细胞术检测过表达miR-10a的肝癌细胞的凋亡和细胞周期;生物信息学预测并以Western blotting检测过表达miR-10a的肝癌细胞中转录因子E2F3的表达量。结果：与癌旁组织相比,肝癌组织中的miR-10a显著低表达\[（-9.89±168） vs （-7.84±1.97）, P =0.000\]。转染miR-10a模拟物后肝癌细胞系中miR-10a的表达量是转染对照小RNA组或空白组细胞的16倍左右。过表达miR-10a可显著抑制7种肝癌细胞（QGY-7701、QGY-7703、Huh7、PCL/PRF/5、HepG2、BeL-7402、SMMC-7721）的增殖（均 P <0.05）,并引起肝癌细胞细胞周期G1/S期阻滞,但并不能诱导肝癌细胞发生凋亡。生物信息学预测显示E2F3是miR-10a可能的靶分子,Western blotting检测显示过表达miR-10a可明显抑制肝癌细胞中E2F3的表达\[（0.50±0.12) vs (0.79±0.21), P <0.05\]。结论：人肝癌组织中低表达miR-10a,转染miR-10a模拟物后多种肝癌细胞的增殖均受到明显抑制,其机制可能与miR-10a靶向作用转录因子E2F3并阻滞肝癌细胞细胞周期于G1/S期有关。     

miR-181a对人食管癌TE11细胞增殖、迁移和侵袭能力的影响

目的:通过构建miR-181a的真核表达载体,研究其对人食管癌TE11细胞增殖、迁移和侵袭能力的影响。方法:以95C细胞基因组DNA为模板,扩增得到miR-181a前体序列,插入表达载体pcDNA3.1(+)克隆获得pcDNA3.1(+)-miR-181a。将真核表达载体pcDNA3.1(+)-miR-181a转染到TE11细胞中,并采用实时荧光定量-PCR(real-time fluorogentic quantitative-PCR,RFQ-PCR)对其表达情况进行验证。分别采用MTT法、细胞划痕法和Boyden小室法检测转染重组质粒pcDNA3.1(+)-miR-181a对TE11细胞增殖能力、迁移能力和侵袭能力的影响。结果:成功构建了插入miR-181a基因片段的真核表达载体pcDNA3.1(+)-miR-181a;RFQ-PCR检测结果表明,转染pcDNA3.1(+)-miR-181a的TE11细胞能够过表达成熟的miR-181a(P<0.05)。过表达miR-181a的TE11细胞增殖能力、迁移能力和细胞侵袭能力均明显增强。结论:miR-181a在TE11细胞中过表达能够增加细胞的增殖、迁移和侵袭能力,为进一步深入研究miR-181a在肿瘤中的作用机制提供了实验依据。     

肝癌细胞中定向表达p16基因的腺病毒载体的构建及其活性表达

目的：克隆AFP启动子和p16基因全长cDNA,构建在肝癌细胞中定向表达p16基因的腺病毒载体,研究p16基因表达对肝癌细胞的影响。方法：采用分子生物学技术手段,克隆AFP启动子和p16基因全长cDNA,将其插入腺病毒载体质粒中,并在293细胞中重组出携带p16基因的腺病毒AdAFP-p16。Western Blot检测p16基因在肝癌细胞中的特异性表达。细胞病变效应（CPE）观察p16基因表达对肝癌细胞生长的抑制作用。结果：AdAFP-p16能够介导p16基因在肝癌细胞中特异性表达,而对正常细胞中p16的表达没有影响;p16基因表达能够特异性抑制肝癌细胞的生长。结论：采用AFP启动子可以实现p16基因的肝癌细胞中定向而特异性表达,提高基因表达产物在肿瘤局部的浓度,有利于提高治疗效果。     

Enhanced antitumor efficacy of a novel fiber chimeric oncolytic adenovirus expressing p53 on hepatocellular carcinoma

Oncolytic adenoviruses may offer a new treatment option and improve the prognosis for patients with hepatocellular carcinoma (HCC). However, the antitumor efficacy of oncolytic adenoviruses on HCC cells is compromised due to low expression of the adenovirus serotype 5 (Ad5) receptor on the target cells. In this study we showed that all HCC cell lines and clinical samples expressed high level of CD46, the receptor for Adenovirus 35 (Ad35) and constructed new fiber chimeric oncolytic adenoviruses with or without a p53 gene expression cassette, SG635-p53 and SG635, respectively. These variants were derived from the previously described Ad5 vectors SG600-p53 and SG600 by replacing the Ad5 fiber with a chimeric Ad5/35 fiber. It was found that the 5/35 fiber chimeric adenovirus vector (Ad5/35-EGFP) demonstrated significantly improved transduction in all tested HCC cell lines compared with the Ad5 vector (Ad5-EGFP). The new fiber chimeric oncolytic adenoviruses produced more progeny viruses in HCC cells than did the Ad5-based viruses but replicated weakly in normal fibroblast BJ cells. In addition, SG635-p53 mediated a higher level of transgenic expression than SG600-p53 in Hep3B and Huh7 cells and showed a markedly enhanced antitumor effect on HCC cells in vitro compared with SG635 or SG600-p53 without causing significant cytotoxicity to normal cells. Antitumor activity of SG635-p53 was shown in Hep3B subcutaneous xenograft tumor models following intratumoral injection, resulting in significant inhibition of tumor growth and prolonged survival of animals. Our data suggest that SG635-p53, as a fiber chimeric oncolytic adenovirus in combination with p53 expression, may serve as a novel, promising and safe anticancer agent for the treatment of HCC.     

Tripartite motif-containing 3 (TRIM3) inhibits tumor growth and metastasis of liver cancer

Background:Reduced expression of tripartite motif-containing 3 (TRIM3) has been reported to be involved in the pathogenesis of human glioblastoma.In our previous research,we found that TRIM3 expression was markedly reduced in human primary hepatocellular carcinoma (HCC) tissues and that low TRIM3 expression was associated with short survival of HCC patients.However,the role of TRIM3 in liver cancer remains unknown.This study aimed to investigate the function of TRIM3 in liver cancer cells.Methods:The protein levels of TRIM3 in five liver cancer cell lines (SK-Hep1,Hep3B,Huh7,HepG2,Bel-7402) and one normal liver cell line (L02) were detected with Western blotting.HepG2 and Bel-7402 cells with IowTRIM3 expression were infected with recombinant lentiviruses overexpressing TRIM3 (LV-TRIM3),whereas Huh7 and Hep3B cells with high TRIM3 expression were transfected with TRIM3-targeted small interfering RNA (siTRIM3).The functions of TRIM3 in the proliferation,colony formation,cell cycle,migration,invasion,and apoptosis of the above cell lines were examined.The effect of TRIM3 on tumor growth and metastases in nude mice was also investigated.Results:TRIM3 was overexpressed in HepG2 and Bel-7402 cells with LV-TRIM3 infection,which further reduced proliferation,colony formation,migration,and invasion of both cell lines.Cell cycle analysis showed thatTRIM3 overexpression induced G0/G1 phase arrest in HepG2 and Bel-7402 cells.Moreover,apoptosis was not increased in HepG2 or Bel-7402 cells overexpressing TRIM3.Contrarily,silencing TRIM3 expression in Huh7 and Hep3B cells by siTRIM3 led to significantly decreased percentages of both cells in the G0/G1 phase and promoted cell proliferation,colony formation,migration,and invasion.In vivo experiment results confirmed thatTRIM3 overexpression suppressed tumor growth and metastasis.Conclusions:TRIM3 plays a tumor-suppressing role in the regulation of liver cancer development by reducing cell proliferation through cell cycle arrest at the G0/G1 phase.     

miR-132在食管癌细胞系KYSE150 中对靶基因FOXA1的调控作用

 目的构建miR-132真核表达载体和融合靶基因FOXA1表达载体,在食管癌细胞KYSE150中验证miR-132对靶基因 FOXA1的调控作用。方法根据miR-132序列在基因组中的位置及其上下游序列,以EC9706细胞基因组DNA为模板,扩 增包含miR-132前体序列,克隆到pMD18-T Simple中,经BamHⅠ和EcoRⅠ酶切后亚克隆到质粒pcDNA3.1(+)上;通过 Real-time PCR检测转染重组表达载体pcDNA3.1-miR-132的KYSE150成熟miR-132的表达水平。用生物信息学软件对 miR-132的靶基因进行预测,将候选靶基因FOXA1的3′UTR区融合到pMIR荧光素酶基因下游,通过双荧光素酶报告基 因检测分析miR-132对靶基因FOXA1的调控作用。将pCDNA3.1-miR-132表达质粒转染人食管癌细胞KYSE150,通过 Western blot检测miR-132对FOXA1蛋白表达的影响。结果成功构建了miR-132真核表达载体,Real-time PCR验证表 明pCDNA3.1-miR-132在KYSE150细胞中能够显著地过表达成熟miR-132。生物信息学预测FOXA1可能是miR-132的靶基 因。双荧光素酶报告基因分析表明miR-132能够作用于FOXA1的3′UTR。Western blot进一步证实miR-132能够抑制 内源性FOXA1蛋白的表达。结论FOXA1是miR-132直接调控的靶基因。     

miR-513a-5p慢病毒载体的构建及其对人骨肉瘤细胞放疗敏感性的影响

目的:构建miR-513a-5p慢病毒过表达载体,转染人骨肉瘤细胞株,观察miR-513a-5p对人骨肉瘤细胞放疗敏感性的影响。方法:PCR法扩增人miR-513a-5p基因,克隆入pLentis-CMV-GFP-MCS-PGK-PURO载体获得重组质粒pLentis-miR513a,双酶切鉴定并测序后将正确的重组质粒和对照质粒转染293FT细胞制备慢病毒,分别转染骨肉瘤HOS和U2OS细胞,qRT-PCR法及荧光显微镜鉴定转染结果。克隆形成实验、MTT法检测miR-513a-5p高表达HOS和U2OS细胞在X射线照射下细胞存活情况。结果:双酶切及测序结果确定成功构建miR-513a-5p慢病毒载体pLentis-miR513a。qRT-PCR结果提示,转染骨肉瘤细胞株后miR-513a-5p表达显著升高。克隆形成实验结果显示miR-513a-5p高表达后骨肉瘤细胞在X射线照射下细胞增殖减慢。MTT结果提示miR-513a-5p高表达骨肉瘤细胞经X射线照射后细胞存活减少。结论:成功构建了miR-513a-5p慢病毒载体,建立了高效稳定表达miR-513a-5p的骨肉瘤细胞株,高表达miR-513a-5p能显著增加X射线照射后骨肉瘤细胞的放疗敏感性。     

Induction of Apoptosis by IGFBP3 Overexpression in Hepatocellular Carcinoma Cells

Background: The insulin-like growth factor (IGF) system comprises a group of proteins that play key rolesin regulating cell growth, differentiation, and apoptosis in a variety of cellular systems. The aim of this studywas to investigate the role of insulin-like growth factor binding protein 3 (IGFBP3) in hepatocellular carcinoma.Materials and Methods: Expression of IGF2, IGFBP3, and PTEN was analyzed by qRT-PCR. Lentivirus vectorswere used to overexpress IGFBP3 in hepatocellular carcinoma cell (HCC) lines. The effect of IGFBP3 onproliferation was investigated by MTT and colony formation assays. Results: Expression of IGF2, IGFBP3, andPTEN in several HCC cell lines was lower than in normal cell lines. After 5-aza-2’-deoxycytidine/trichostatin Atreatment, significant demethylation of the promoter region of IGFBP3 was observed in HCC cells. Overexpressionof IGFBP3 induced apoptosis and reduced colony formation in HUH7 cells. Conclusions: Expression of IGF2,IGFBP3, and PTEN in several HCC cell lines was lower than in normal cell lines. After 5-aza-2’-deoxycytidine/trichostatin A treatment, significant demethylation of the promoter region of IGFBP3 was observed in HCCcells. Overexpression of IGFBP3 induced apoptosis and reduced colony formation in HUH7 cells.     

Epidermal growth factor receptor vIII enhances tumorigenicity and resistance to 5-fluorouracil in human hepatocellular carcinoma

We investigated whether EGFRvIII contributes to tumorigenicity and resistance to 5-FU in HCC cell lines. Our results show that several HCC cell lines have EGFRvIII expression. EGFRvIII-positive HCC cells grew more rapidly and had a lower sensitivity to 5-FU than EGFRvIII-negative HCC cells. For further analysis of the biological characteristics of EGFRvIII, an EGFRvIII or EGFR expression cassette was introduced into the HCC cell line, Huh-7. Compared with Huh-7 cells and Huh7-EGFR cells, Huh7-EGFRvIII not only exhibit significantly increase of cell growth in vitro and in vivo but also show enhanced migration in vitro. Furthermore, 5-FU has significantly lower inhibition effect on Huh7-EGFRvIII cells then on both Huh-7 and Huh7-EGFR cells in vitro and in vivo. Collectively, these results demonstrate that EGFRvIII plays a pivotal role in tumorigenicity and enhanced 5-FU resistance of HCC.     

miR-638用于治疗乙肝相关肝癌可能性的实验研究

目的:探讨miR-638用于治疗乙肝相关肝癌的可能性。方法:qRT-PCR方法检测miR-638在乙肝、肝癌患者及正常人群血清中的表达差异,并分析血清miR-638的表达水平与其它血清指标的相关性。上调乙肝病毒(HBV)稳定复制的HepG2.2.15肝癌细胞株中miR-638的表达水平, MTT法和细胞克隆实验检测miR-638过表达对HepG2.2.15细胞增殖的影响;ELISA和qRT-PCR方法检测细胞培养上清液中HBsAg、HBeAg和HBV DNA的表达水平。结果:miR-638在乙肝及肝癌患者血清中的表达水平均显著低于正常人群（P＜0.000 1）;在乙肝及肝癌患者血清中miR-638的表达水平,总体间与HBV DNA、谷草转氨酶（AST）及谷丙转氨酶（ALT）水平呈显著负相关（P值分别为0.026、<0.001和0.003）。MTT分析及集落形成实验显示miR-638能够显著抑制HepG2.2.15细胞的增殖及集落形成能力。miR-638表达上调后,HBsAg（P＜0.05）、HBeAg（P＜0.05）和HBV DNA水平（P＜0.001）较miR-ctrl组均显著下降。结论:miR-638在HBV复制过程中发挥作用,miR-638过表达可同时抑制HepG2.2.15细胞的增殖能力和HBV的复制。     

HBx蛋白羧基端缺失对肝癌细胞生物学行为的影响

背景与目的:肝癌组织内普遍存在着截短表达的HBx蛋白,这种蛋白可能与肝癌的发生有关,本研究探讨截短表达的HBx蛋白和野生型HBx对人肝癌细胞Huh7生物学行为的影响。方法:脂质体法介导HBx突变体和野生型HBx重组体转染HBV(-)的Huh7细胞。PCR方法扩增Neo基因检测质粒DNA片段插入。通过MTT、平板克隆形成实验、流式细胞仪和裸鼠成瘤实验检测稳定转染细胞的生物学活性。结果:HBx3′-20和HBx3′-40组细胞生长速度较HBx3′-30组明显增快(P<0.05);HBx3′-20组[(17.34±2.77)%]和HBx3′-40组[(18.36±2.61)%]克隆形成率明显较HBx3′-30组[(7.31±1.44)%]和pcDNA3组[(6.87±2.38)%]高(P<0.05)。细胞周期检测结果显示,对比于野生型HBx组,HBx3′-20组和HBx3′-40组蛋白的表达能加速Huh7细胞由G0/G1期到S期的进程[S期:(36.96±1.82)%vs.(46.20±3.23)%,(53.99±4.02)%,P<0.05],相反,HBx3′-10和HBx3′-30组则出现G1期阻滞,而HBx组与pcDNA3空载体组间[(38.60±1.15)%]在S期无明显变化。裸鼠成瘤实验显示,HBx3′-40组[(3.19±0.34)cm3]成瘤体积明显大于HBx3′-30组[(1.58±0.27)cm3]、HBx组[(1.75±0.15)cm3]和pcDNA3组[(1.67±0.12)cm3],各组瘤重存在显著性差异(P<0.01)。结论:对比野生型HBx组,HBx3′-20和HBx3′-40对Huh7细胞的生长具有明显促增殖作用,HBx3′-30组显示出抑制作用。HBx通过缺失突变修饰其生物学功能,在原发性肝癌发生、发展过程中起着重要作用。