温阳活血退黄方对阴黄证大鼠肝细胞凋亡及bcl-2和bax蛋白表达的影响

目的：观察温阳活血退黄方对阴黄证大鼠肝细胞凋亡，相关调控基因bcl—2、bax蛋白表达的影响。方法：72只大鼠随机分为6组：正常对照组，阴黄证模型组，阳黄对照组，阴黄证模型加温阳活血退黄方高、低剂量组，菌陈术附汤组。采用TUNEL和免疫组化法检测大鼠肝细胞凋亡和bcl—2、bax蛋白表达。结果：阴黄模型组大鼠肝细胞凋亡程度明显高于阳黄模型组及正常对照组(P＜0．01)，温阳活血退黄方高剂量组肝细胞凋亡程度明显低于阴黄模型组(P＜0．05)。温阳活血退黄方高、低剂量组肝组织bcl—2蛋白表达明显高于阴黄模型组(P＜0．0l，＜0．05)，且其bax蛋白表达明显低于阴黄模型组(P＜0．01，＜0．05)，体现较好量效关系。结论：温阳活血退黄方可能通过促进bcl—2蛋白表达抑制bax蛋白表达阻断阴黄证大鼠肝细胞凋亡，可能是其治疗阴黄证的机制之一。     

Dissection of the genetic programs of p53-mediated G1 growth arrest and apoptosis: blocking p53-induced apoptosis unmasks G1 arrest

Employing the myeloblastic leukemia M1 cell line, which does not express endogenous p53, and genetically engineered variants, it was recently shown that activation of p53, using a p53 temperature- sensitive mutant transgene (p53ts), resulted in rapid apoptosis that was delayed by high level ectopic expression of bcl-2. In this report, advantage has been taken of these M1 variants to investigate the relationship between p53-mediated G1 arrest and apoptosis. Flow cytometric cell cycle analysis has provided evidence that activation of wild-type (wt) p53 function in M1 cells resulted in the induction of G1 growth arrest; this was clearly seen in the M1p53/bcl-2 cells because of the delay in apoptosis that unmasked p53-induced G1 growth arrest. This finding was further corroborated at the molecular level by analysis of the expression and function of key cell cycle regulatory genes in M1p53 versus M1p53/bcl-2 cells after the activation of wt p53 function; events that take place at early times during the p53-induced G1 arrest occur in both the M1p53 and the M1p53/bcl-2 cells, whereas later events occur only in the M1p53/bcl-2 cells, which undergo delayed apoptosis, thereby allowing the cells to complete G1 arrest. Finally, it was observed that a spectrum of p53 target genes implicated in p53- induced growth suppression and apoptosis were similarly regulated, either induced (gadd45, waf1, mdm2, and bax) or suppressed (c-myc and bcl-2), after activation of wt p53 function in M1p53 and M1p53/bcl-2 cells. Taken together, these findings show that wt p53 can simultaneously induce the genetic programs of both G1 growth arrest and apoptosis within the same cell type, in which the genetic program of cell death can proceed in either G1-arrested (M1p53/bcl-2) or cycling (M1p53) cells. These findings increase our understanding of the functions of p53 as a tumor suppressor and how alterations in these functions could contribute to malignancy.     

小鼠白血病Cyclin G和其它相关蛋白表达及凋亡研究

目的：探讨在白血病细胞中细胞周期素zCyclin)G,Cyclin D,P16,P21,P53等基因的蛋白表达水平和白血病细胞周期变化。方法：建立白血病模型（L615）；采用免疫组织化学法检测小鼠的Cyclin G、P53、P21、Cyclin D、P16和C－fos、bcl-2的表达；流式细胞术检测小鼠白血病细胞的凋亡率和细胞周期。结果；阳性组和复发组的Cyclin G、Cyclin D、C－fos表达明显高于正常组和化疗组（P＜0．05），P16则相反（P＜0．01）；P21在四组中的表达差异无显著性意义（P＞0．05）；阳性组和复发组P53的表达为阴性，而化疗组与正常组表达差异无显著性意义（P＞0．05）；bcl-2四组表达差异无显著性意义（P＞0．05）；化疗组和阳性组的细胞凋亡率均较正常组增高（P＜0．05），且化疗组的凋亡率比阳性组的明显增高（P＜0．01）。结论：白血病的发生、发展可能与Cyclin G、Cyclin D、C－fos基因的高表达，P16低表达有关。     

Transforming growth factor beta and tumor necrosis factor alpha inhibit both apoptosis and proliferation of activated rat hepatic stellate cells.

Transforming growth factor beta (TGF-beta) as well as tumor necrosis factor alpha (TNF-alpha) gene expression are up-regulated in chronically inflamed liver. These cytokines were investigated for their influence on apoptosis and proliferation of activated hepatic stellate cells (HSCs). Spontaneous apoptosis in activated HSC was significantly down-regulated by 53% +/- 8% (P <.01) under the influence of TGF-beta and by 28% +/- 2% (P <.05) under the influence of TNF-alpha. TGF-beta and TNF-alpha significantly reduced expression of CD95L in activated HSCs, whereas CD95 expression remained unchanged. Furthermore, HSC apoptosis induced by CD95-agonistic antibodies was reduced from 96% +/- 2% to 51 +/- 7% (P <.01) by TGF-beta, and from 96% +/- 2% to 58 +/- 2% (P <.01) by TNF-alpha, suggesting that intracellular antiapoptotic mechanisms may also be activated by both cytokines. During activation, HSC cultures showed a reduced portion of cells in the G0/G1 phase and a strong increment of G2-phase cells. This increment was significantly inhibited (G1 arrest) by administration of TGF-beta and/or TNF-alpha to activated cells. In liver sections of chronically damaged rat liver (CCl4 model), using desmin and CD95L as markers for activated HSC, most of these cells did not show apoptotic signs (TUNEL-negative). Taken together, these findings indicate that TGF-beta and/or TNF-alpha both inhibit proliferation and also apoptosis in activated HSC in vitro. Both processes seem to be linked to each other, and their inhibition could represent the mechanism responsible for prolonged survival of activated HSC in chronic liver damage in vivo.     

外源性 TGF-β1对原代急性早幼粒细胞白血病细胞凋亡的影响及机制探讨

目的观察外源性转化生长因子β1（TGF—β1）对原代急性早幼粒细胞白血病细胞（APL）凋亡的影响,并探讨其可能机制。方法将APL细胞分为4组,对照组不加任何药物,实验组用终浓度为t、5、10ng／mLTGF-B,处理（实验1、2、3组）,分别处理24、48、72h,采用瑞氏一吉姆萨染色法检测细胞凋亡,流式细胞仪检测细胞周期,免疫组化法检测TGF-β1、P27Kipl、CyclinE、bcl-2蛋白,RT—PCR技术检测TGF—β1、P27Kipl、CyclinE、bcl-2mRNA。结果与对照组比较,实验1、2、3组24、48h细胞凋亡率升高（P均〈0．05）;与同组24h比较,实验1、2、3组48h细胞凋亡率升高（P均〈0．05）。对照组细胞培养48h未见明显细胞周期阻滞;与对照组比较,实验1组48h细胞周期阻滞于G。期,实验2、3组APL细胞周期明显阻滞于G,期。与对照组比较,实验2组TGF-β1、P27Kipl蛋白水平升高,CyclinE、bcl-2蛋白降低（P均〈0．05）。1’、2’β—actin条带亮度相同,实验2组（2道）P27Kipl mRNA条带亮度与对照组（1道）相同,P27Kipl mRNA水平较对照组变化不明显;1’、2’β-actin条带亮度相同,实验2组（2道）条带亮度明显高于对照组（1道）;实验2组CyclinE条带与对照组比较亮度减低,CyclinE表达下调。结论外源性TGF—β1通过上调TGF-β1、P27Kipl及下调CyclinE、bcl-2作用,诱导细胞发生凋亡,使细胞阻滞于G1期。     

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。     

c-myc and bcl-2 modulate p53 function by altering p53 subcellular trafficking during the cell cycle.

We have studied the ability of c-myc and bcl-2 oncogenes to modulate p53 function. Our studies show that coincident expression of human Bcl-2 protein with p53 prolongs survival of murine erythroleukemia cells. This effect was associated with a loss of the G1 specificity of p53-mediated cell cycle arrest. Furthermore, we found that the c-myc and bcl-2 genes cooperate to inhibit p53 functions. Coexpression of bcl-2 and c-myc can totally overcome p53-induced apoptosis and cell cycle arrest by altering the subcellular trafficking of p53 during the cell cycle: the p53 remains in the cytoplasm of the cotransfected cells during a critical period in G1. This finding suggests a mechanism by which normal hematopoietic progenitors can survive and proliferate despite p53 expression and by which the inappropriate expression of bcl-2 and c-myc can cooperate in transformation.     

Flavopiridol对人尤文肉瘤VH-64细胞株增殖与凋亡的影响

目的观察小分子细胞周期蛋白激酶抑制剂Flavopiridol（FP）对人尤文肉瘤VH-64细胞株增殖与凋亡的影响,初步探讨FP对尤文肉瘤的体外抗肿瘤活性。方法将FP作用于VH-64细胞株,光学显微镜观察其形态变化,MTT法测定FP对VH-64细胞增殖的抑制率,流式细胞仪及DNA凝胶电泳法检测细胞凋亡, Western blot检测bcl-2、bax和caspase-8的蛋白表达变化。结果MTT实验显示,FP对VH-64细胞株增殖有抑制作用,其抑制效应具有时间及浓度依赖特点;琼脂糖凝胶电泳及流式细胞计数分析表明,FP可诱导细胞凋亡,并导致G0／G1期阻滞;免疫印迹检测显示,FP对bel-2及bax的表达无影响,但活性型caspase-8表达被上调。结论FP可诱导人尤文肉瘤VH-64细胞株凋亡,其作用不依赖于bcl-2／bax基因的变化,caspase-8路径的激活可能为其机制之一。     

丁型肝炎患者肝组织中Bcl-2、Bax和肝细胞凋亡表达

目的 探讨bcl-2、bax及肝细胞凋亡在丁型肝炎发病机理中的作用。方法 采用免疫组织化学单、双标记染色和TUNEL技术、检测77例丁型肝炎患者肝组织HDAg、bcl-1、bax及肝细胞凋亡表达，以67例乙型肝炎作对照，结果 bcl-2和bax均以肝细胞浆表达为主。HDAg以肝细胞核表达为主。HDAg和Bax与凋亡细胞表达及分布有相关性，三成分在各型肝炎中的表达强度差异有显著意义（P＜0.05）。结论 HDAg、bax和肝细胞凋亡表达强度和阳性细胞分布均与肝组织炎症活动及病理损害程度相关，HDV感染可诱导肝细胞表达bax，增强肝细胞凋亡，这一机制在丁型肝炎发病机理中可能有一定重要作用。     

缺血预处理抑制减体积肝移植大鼠早期肝细胞凋亡的研究

目的探讨缺血预处理（IPC）对减体积肝移植大鼠再灌注损伤早期细胞凋亡的影响。方法建立50%减体积大鼠肝移植模型,将72只成年雄性SD大鼠随机分为两组：对照组和IPC组,检测术后2、6、24 h血清丙氨酸转氨酶（ALT）水平变化及组织病理学变化;TUNEL法检测术后24 h肝细胞凋亡指数;免疫组织化学检测bcl-2和caspase-3蛋白表达。结果与对照组比较,IPC组术后6、24 h ALT水平下降,术后24 h肝损伤减轻,肝细胞凋亡指数、caspase-3表达均下降,而抗凋亡蛋白bcl-2表达增加（P均〈0.01）。结论 IPC明显减轻减体积肝移植术后再灌注损伤,其机制与通过上调bcl-2、下调caspase-3蛋白表达,从而抑制肝脏细胞凋亡相关。     

Thyroid hormone regulation of apoptosis induced by retinoic acid in promyeloleukemic HL-60 cells: studies with retinoic acid receptor-specific and retinoid x receptor-specific ligands.

3,5,3'-Triiodo-L-thyronine (T3) potentiates apoptosis during the all-trans-retinoic acid-induced differentiation of promyeloleukemic HL-60 cells. We examined whether the retinoid receptor-specific thyroid hormone action is present during differentiation of HL-60 cells in this study. We used two distinct retinoid receptor agonists. T3 potentiates G1 arrest induced by Am80, a retinoic acid receptor (RAR)-specific agonist, but had no effect on G1 arrest induced by HX600, a retinoid x receptor (RXR)-specific agonist. Am80 alone induces the apoptosis, and T3 enhances it. Although HX600 alone fails to increase the apoptotic fraction, T3 enables the compounds to induce apoptosis. Am80-induced expression of CD11b, a marker for the differentiation, is enhanced by T3. However, T3 or HX600 or both do not affect the expression of CD11b. T3 does not alter the amount of mRNAs of various members of the bcl-2 family. T3, however, enhances the Am80-induced expression of bfl-1 and suppression of bcl-2. In contrast, T3 does not alter either bfl-1 and bcl-2 expression in the presence of HX600. Our observations suggest that cooperative action of T3 with an RXR-specific ligand is different from that with an RAR ligand in cellular apoptotic regulation and that thyroid hormone may be available as a chemotherapeutic agent in acute leukemia.     

基质细胞衍生因子-1及其受体对大鼠主动脉血管平滑肌细胞增殖与凋亡的影响

目的研究基质细胞衍生因子-1(SDF-1)对氧化低密度脂蛋白(ox-LDL)诱导的血管平滑肌细胞(VSMC)增殖与凋亡的影响。方法选用体外培养的大鼠主动脉VSMC,并分为正常对照组、ox-LDL组[动脉粥样硬化(AS)模型]、SDF-1组(AS模型+SDF-1)、SDF-1+12G5组(AS模型+SDF-1+CXCR4单克隆抗体)和12G5组(AS模型+CXCR4单克隆抗体),应用MTT法测VSMC细胞增殖,TUNEL法测细胞凋亡率,RT-PCR法测凋亡基因bax、bcl-2mRNA的表达。结果ox-LDL组的增殖率0.38±0.01,明显高于正常对照组0.28±0.02(P<0.01),明显低于SDF-1组0.44±0.02(P<0.01),与SDF-1+12G5组和12G5组比较差异无显著性(P>0.05);ox-LDL组的凋亡率24.2±2.4,高于正常对照组19.8±2.7和SDF-1组20.7±2.8(P<0.05),而与SDF-1+12G5组和12G5组比较差异无显著性(P>0.05);ox-LDL组bcl-2和bax的比值明显低于正常对照组和SDF-1组(P<0.01),而与SDF-1+12G5组和12G5组差异无显著性(P>0.05)。结论SDF-1可明显促进ox-LDL诱导的VSMC增殖,并抑制细胞凋亡;SDF-1及其受体CXCR4构成的生物学轴可能通过bcl-2/bax途径影响VSMC凋亡。     

白藜芦醇对实验性兔骨关节炎软骨细胞凋亡及bcl-2 bax表达的影响

目的 研究白藜芦醇对兔实验性骨关节炎(OA)软骨细胞凋亡及凋亡调控基因bcl-2、bax表达的影响,探讨其治疗OA的机制.方法 30只新西兰大白兔随机平分为5组,A组(健康对照组)、B组(模型对照组)、C组(白藜芦醇高剂量干预组)、D组(白藜芦醇中剂量干预组)、E组(白藜芦醇低剂量干预组).除A组外,其他各组均以Hulth法复制膝OA模型.术后第4周开始,A组、B组每天以5 ml含0.1%二甲基亚砜的蒸馏水灌胃;白藜芦醇干预各组每天以相应剂量白藜芦醇溶液(浓度为60 mg/ml)灌胃,C、D、E组日剂量分别为120、60、30mg·kg-1·d-1,连续6周.第10周处死大白兔,取右膝关节股骨内髁内侧软骨,软骨组织切片用脱氧核糖核苷酸末端转移酶介导的缺口末端标记(TUNEL)法观察软骨细胞凋亡,免疫组织化学法观察软骨细胞bcl-2和bax的表达.结果 ①模型对照组关节软骨细胞凋亡率明显高于健康对照组;白藜芦醇干预各组可不同程度地降低OA软骨细胞凋亡率,差异有统计学意义(P＜0.05),且呈剂量依赖性.②与健康对照组相比,模型对照组关节软骨细胞bcl-2和bax阳性率均升高(P＜0.01),bcl-2/bax的比值降低;白藜芦醇干预后,bcl-2阳性率升高更为明显(P＜0.01);而bax阳性率有不同程度降低(P＜0.01);bcl-2/bax的比值均不同程度提高(P＜0.01).结论 白藜芦醇通过上调bcl-2的表达,下调bax的表达,提高bcl-2/bax的比值,以抑制兔实验性OA中软骨细胞的过度凋亡,达到保护软骨,防治OA的目的 .     

低Se低VE诱导肝细胞凋亡及相关基因所起的作用

目的 研究低硒（Ｓｅ）低维生素Ｅ（ＶＥ）能否诱导大鼠肝细胞凋亡及相关基因ｐ５３、ｂｃｌ－２和ｃ－ｍｙｃ所起的作用。方法 以天然的和人工半合成的低Ｓｅ低ＶＥ饲料喂养大鼠１７周,采用末端脱氧核苷酸转移酶介导的缺口末端标记（ＴＵＮＥＬ）检测肝细胞凋亡,采用免疫组化法检测肝细胞ｐ５３、ｂｃｌ－２和ｃ－ｍｙｃ蛋白。结果 与补Ｓｅ和ＶＥ组大鼠相比,低Ｓｅ低ＶＥ组大鼠肝细胞凋亡显著增加;ｐ５３和ｃ－ｍｙｃ蛋白增     

凋亡相关基因caspase-9,bax及bcl-2在大肠癌中的表达及其意义

目的探讨凋亡相关基因easpase-9,bax和bel-2在大肠癌中的表达及其在大肠癌发生、发展中的可能作用及相互关系。方法应用免疫组化S-P法检测20例正常大肠黏膜、48例大肠腺瘤及56例大肠癌中的caspase-9、bax和bcl-2蛋白的表达。用TUNEL 法检测细胞凋亡。结果正常大肠黏膜、大肠腺瘤和大肠癌中caspase-9的阳性表达率分别为5．00％、33．33％、64．29％,其表达率在三者间差异有显著性(P<0．01)。bax在三种组织中的表达率分别为5．00％、35．42％、62．50％,三者间差异有显著性(P<0．01)。bcl-2 在三者中的阳性表达率分别为15．00％、87．50％、60．71％,三者间差异亦有显著性(P<0．01)。caspase-9,bax和bcl-2的表达与大肠癌的分化程度有关(P<0．01),与Dukes分期无关(P>05)。正常大肠黏膜、腺瘤和大肠癌中细胞凋亡指数差异有显著性(P<0．01),细胞凋亡指数与肿瘤的分化程度有关(P<0．01),与Dukes分期无关(P>0．05)。caspase-9、bax和bcl-2的表达与细胞凋亡指数有密切联系 (P<0．01)。结论肿瘤早期阶段的细胞凋亡异常,可能是大肠癌的发病原因之一。bcl-2和bax通过调节caspase-9参与大肠癌的发生。     

Fas antigen expression on hepatocytes predicts the short- and long-term response to interferon therapy in patients with chronic hepatitis C

BACKGROUND: Interaction between Fas antigen on hepatocytes and Fas ligand on cytotoxic T cells induces apoptosis, a major mechanism of hepatitis C virus (HCV) -induced hepatocyte injury. We investigated the usefulness of Fas expression on hepatocytes as a predictor of short-and long-term response to interferon (IFN) therapy in 72 patients with chronic hepatitis C. METHODS: Ten million units of recombinant IFN-alpha2b were administered daily for the first 2 weeks, and three times a week for another 22 weeks. The short-term efficacy of IFN therapy was evaluated after 12-month follow-up from cessation of treatment. We also examined the long-term response to IFN at 56.6 +/- 10.8 (mean +/- s) months after termination of IFN therapy in 55 of 72 patients. RESULTS: Univariate analysis showed that serum HCV-RNA levels, HCV genotype and Fas expression significantly correlated with the short-term efficacy of IFN therapy (P = 0.005, 0.006, and 0.04, respectively). Fas antigen expression did not correlate with serum HCV-RNA levels (P = 0.286), but significantly correlated with HCV genotype (P = 0.003). Multivariate analysis indicated that Fas expression and serum HCV-RNA levels were independent determinants of the short-term response to IFN therapy. Combined together, Fas expression and serum HCV-RNA levels accurately predicted the short-term response to IFN therapy. On the other hand, in 55 patients who were examined the long-term response to IFN, about 60% of Fas-positive patients were HCV-RNA negative, whereas 30% of Fas-negative patients were HCV-RNA negative (P = 0.04). Among Fas-positive patients, the percentage of those with serum ALT levels persistently lower than twice the normal upper limit in long-term study (81.8%; 9/11) was significantly higher than those in short-term study even among patients who failed to show elimination of HCV-RNA (36.4%; 4/11, P = 0.03). CONCLUSION: Our results indicate that Fas expression on hepatocytes is a good predictor of the short-and long-term response to IFN therapy.     

三氧化二砷对肺腺癌化学治疗敏感性的影响及其机制

目的　研究三氧化二砷 (As2 O3)对肺腺癌细胞生长过程及化学治疗 (简称化疗 )敏感性的影响。方法　应用四甲基偶氮唑蓝 (MTT)比色、免疫组织化学、流式细胞仪、逆转录 聚合酶链反应(RT PCR)等方法 ,观察不同浓度As2 O3 对人肺腺癌A549细胞株生长、化疗敏感性、细胞周期 ,及凋亡基因Fas/FasL、抗凋亡基因B淋巴细胞白血病 2 (bcl 2 )和多药耐药相关蛋白 (MRP)、肺耐药蛋白 (LRP)表达水平的影响。结果　 1、2 μmol/L的As2 O3 对人肺腺癌A549细胞株的生长抑制作用较弱 ,但能显著提高A549细胞对顺铂的敏感性 (P <0 .0 5)、提高A549在G1期细胞的比率 ,上调Fas、下调bcl 2及MRP、LRP的表达水平。 5μmol/L的As2 O3 对人肺腺癌A549细胞有一定的抑制作用 ,并可上调bcl 2、MRP、LRP的表达水平 ,但不能提高A549细胞对顺铂的敏感性。结论　低浓度的As2 O3 可能通过提高A549细胞在G1期的比率 ,上调Fas基因和下调bcl 2、MRP、LRP基因的表达水平 ,提高肺腺瘤细胞对化疗的敏感性     

XAF1基因诱导胰腺癌细胞株BxPC3凋亡的实验研究

目的 探讨Ad5/F35腺病毒介导的XAF1基因诱导胰腺癌细胞BxPC3凋亡及其可能的作用机制.方法 将前期构建的重组腺病毒Ad5/F35-XAF1感染胰腺癌细胞BxPc3.采用半定量RTPCR、蛋白质印迹检测法检测感染前后BxPC3细胞XAF1 mRNA和蛋白表达的变化;运用Annexin-V/PI和TUNEL法检测细胞的凋亡率;免疫蛋白印迹法检测细胞Caspase-3、PARP、Caspase-8和Bcl-2蛋白的表达.结果 Ad5/F35-XAF1感染后,BxPC3细胞的XAF1 mRNA和蛋白表达明显增高,与空白组和Ad5/F35-Null对照组比较,差异显著(P＜0.05);两种方法 检测的细胞凋亡率分别为(19.90±3.09)%、(9.29±2.13)%,较Ad5/F35-Null组的(6.72±0.76)%、(2.73±0.51)%和空白组的(7.22±1.53)%、(1.56±0.47)%均有显著差异(P＜0.01);Caspase-3、PARP、Caspase-8蛋白表达显著增强,Bcl-2表达降低.结论 Ad5F35-XAF1重组腺病毒感染胰腺癌细胞BxPC-3能明显诱导细胞的凋亡,其机制可能是激活死亡受体途径和线粒体途径.