沙利度胺对前列腺癌PC3细胞的体外作用及机制研究

目的 研究沙利度胺对激素非依赖性前列腺癌(AIPC)细胞株PC-3体外生长的抑制作用及其可能的机制.方法 将不同浓度的沙利度胺作用于AIPC细胞株PC-3,采用CCK-8法检测沙利度胺对PC-3细胞的增殖抑制作用;流式细胞仪检测凋亡率;通过RT-PCR法检测沙利度胺处理前后PC-3细胞中低氧诱导因子-1(HIF-1α)和血管内皮生长因子(VEGF) mRNA的表达水平;Western blot检测沙利度胺作用后HIF-1α、VEGF、Bcl-2、Bax蛋白的表达水平.结果 不同浓度的沙利度胺作用于PC-3细胞后,细胞增殖水平明显下降(P＜0.05),且沙利度胺对PC-3细胞增殖的抑制作用呈浓度-时间依赖性.流式细胞仪检测结果表明不同浓度的沙利度胺诱导PC-3细胞发生凋亡,和对照组相比差异有统计学意义(P＜0.05).随着沙利度胺浓度的增加,PC-3细胞中HIF-1 α、VEGF mRNA的表达逐渐下调;HIF-1α、VEGF和Bcl-2蛋白的含量逐渐下降,而Bax蛋白的含量逐渐增加.结论 沙利度胺可能通过诱导AIPC细胞的凋亡和抑制肿瘤血管的生成而发挥双重抗肿瘤生长的作用.     

下调PAR基因表达对前列腺癌PC3细胞凋亡及凋亡相关蛋白Bcl-2/Bax的影响

目的:本研究以RNA干扰技术下调PAR(prostate androgen regulated)基因表达,探讨其对前列腺癌PC3细胞增殖、凋亡及其相关蛋白Bcl-2/Bax表达水平的影响。方法:PC3细胞转染靶向PAR基因的siRNA,MTT法检测细胞增殖,用流式细胞术检测细胞凋亡,Western印迹检测Bcl-2和Bax蛋白表达水平。结果:PC3细胞PAR基因表达水平下调,此时处于G2-M期的细胞增加,为(29.95±3.25)%;细胞凋亡率亦明显增加,为(20.61±2.73)%,与对照组比较差异有显著性意义(P<0.01),同时Bcl-2蛋白表达下降,Bax表达水平升高,Bax/Bcl-2比值升高。结论:PAR基因表达下调可诱导细胞G2-M期阻滞和凋亡,其机制为抑制凋亡相关蛋白Bcl-2表达,同时促进Bax表达。     

粉防己碱对激素非依赖性人前列腺癌细胞株PC-3增殖和凋亡影响的研究

目的 探讨粉防己碱(TET)对激素非依赖性人前列腺癌细胞株PC-3细胞增殖抑制和凋亡作用及其机制。方法 应用CCK法观察不同浓度TET（1、2、4、8 μg/mL）对人前列腺癌细胞株PC-3生长的抑制作用;用Annexin-V与PI双染法流式细胞术分析TET对PC-3细胞凋亡的影响;RT-PCR检测TET对人前列腺癌细胞株PC-3 IL-8表达水平的影响。结果 TET对前列腺癌PC-3细胞株增殖有抑制作用,其抑制效应呈剂量依赖性。不同浓度TET作用48 h后,前列腺癌PC-3细胞株的凋亡率随着浓度的增高而升高,差异具有统计学意义（P<0.01）。不同浓度TET作用48 h后IL-8 mRNA表达水平随着浓度的增加而降低,差异具有统计学意义（P<0.01）。结论 TET能抑制人前列腺癌细胞株PC-3细胞增殖,并促进人前列腺癌细胞株PC-3的细胞凋亡,其作用机制可能与其下调IL-8 mRNA表达有关。     

热休克蛋白90抑制剂对PC-3M细胞杀伤效应的研究

目的:观察热休克蛋白90(HSP90)抑制剂对前列腺癌PC-3M细胞增殖活性、细胞周期和凋亡的影响,初步探讨其作用机制.方法:采用四甲基偶氮唑盐(MTT)比色法检测不同浓度的HSP90抑制剂对PC-3M细胞增殖的影响;采用细胞免疫化学测定HSP90抑制剂对PC-3M细胞HER-2表达的影响;采用流式细胞分析术(FCM)检测细胞凋亡和细胞周期.结果:高浓度(500 nmol/L)HSP90抑制剂可杀伤PC-3M细胞,低浓度(10、50、125、250 nmol/L)条件下则主要发挥生长抑制作用.HSP90抑制剂可使PC-3M细胞HER-2表达水平降低,并在500 nmol/L浓度时诱导细胞凋亡.结论:HSP90抑制剂较为明显地抑制PC-3M细胞生长,并在高浓度时杀伤癌细胞;其作用机制可能与下调HER-2的表达有关.     

哺乳动物雷帕霉素靶蛋白抑制剂对前列腺癌激素非依赖型细胞株化疗敏感性的影响

目的:研究哺乳动物雷帕霉素靶蛋白(mTOR)抑制剂CCI-779对激素非依赖型前列腺癌PC-3细胞株化疗敏感性的影响。方法:前列腺癌PC-3细胞培养至对数生长期,CCI-779、紫杉醇单独及联合给药,对照组中加入等体积的培养液;MTT法检测3组药物对PC-3的生长抑制作用,流式细胞术(FCM)检测细胞周期的改变和凋亡率。结果:MTT法显示,与对照组相比,各组药物均可显著抑制PC-3细胞增殖,联合用药能显著增强这种抑制效果;FCM检测发现CCI-779和紫杉醇使PC-3细胞主要阻滞在G1-S期,而联合用药使PC-3细胞主要阻滞在G0/G1期;与对照组相比,药物组PC-3细胞凋亡率均显著增加(P<0.01)。结论:mTOR抑制剂CCI-779能抑制PC-3细胞增殖,增加对前列腺癌的化疗敏感性。     

Apogossypolone诱导前列腺癌PC-3细胞自噬的机制

目的:研究ApoG2对前列腺癌PC-3细胞在体外的作用机制.方法;采用AO染色、TUNEL染色、半定量RT-PCR、Western blot、Caspase-3,-8活性测定等方法研究ApoG2对PC-3细胞的自噬与凋亡的诱导作用.结果:ApoG2可明显抑制PC-3细胞增殖；诱导细胞自噬,加入自噬抑制剂3-MA可增强其诱导凋亡作用；ApoG2作用后,PC-5细胞中Bcl-2 mRNA表达水平降低；Bak mRNA表达水平升高；caspase-3、caspase -8的活性升高.结论:ApoG2诱导PC-3细胞发生自噬,其作用机制可能与Bcl-2下调、Bak上调有关.     

冬凌草甲素和survivin反义核苷酸对前列腺癌细胞作用的研究

目的探讨冬凌草甲素联合survivin反义核苷酸(反义链)对前列腺癌PC-3细胞株增殖和凋亡以及survivin m RNA和蛋白的影响。方法常规培养PC-3细胞,用四甲基偶氮唑盐法(MTT法)检测survivin反义链联合冬凌草甲素对PC-3细胞增殖的影响;流式细胞仪(FCM)检测PC-3细胞凋亡率;以Calcu Syn药效学软件计算联合指数(CI)评价survivin反义链联合凌草甲素对PC-3细胞的联合效应,并通过荧光定量PCR和Western blot方法检测PC-3细胞survivin基因和蛋白表达变化。结果 survivin反义链转染PC-3细胞后,可以显著抑制PC-3细胞增殖,且能诱导PC-3细胞凋亡;冬凌草甲素联合survivin反义链对PC-3细胞增殖抑制率较两者单用组明显增强,显示出协同效应(Fa0.8);冬凌草甲素和survivin反义链联用对PC-3细胞凋亡诱导作用更为显著(P0.01);荧光定量PCR及Western blot显示反义链和冬凌草甲素均使survivin m RNA和蛋白表达下降,两者联合使survivin m RNA和蛋白表达下降更明显(P0.01)。结论 survivin基因反义链和冬凌草甲素均能明显抑制PC-3增殖、诱导细胞凋亡和下调survivin基因和蛋白表达;两者联合作用有协同效应。     

三氧化二砷对激素非依赖性前列腺癌PC-3细胞株Bcl-2、Bax表达的影响

目的了解三氧化二砷对激素非依赖性前列腺癌PC-3细胞株细胞增殖、细胞凋亡及bcl-2、bax基因表达的影响。方法分别以1、2、3、6、10μmol/L的三氧化二砷作用于PC-3细胞,48h后对细胞增殖活性、细胞凋亡及细胞bcl-2、bax基因表达的变化进行检测。结果各浓度的三氧化二砷均可抑制PC-3细胞增殖,并具有剂量依赖性。3、6、10μmol/L的三氧化二砷还可诱导PC-3细胞凋亡,计算细胞凋亡率分别为11．8%、12．7%、29．6%。逆转录聚合酶链反应(RT-PCR)检测PC-3细胞中bcl-2、bax表达的相对强度,发现bcl-2的表达强度随三氧化二砷浓度的升高而逐渐降低(P＜0．01),而bax表达强度变化不明显(P＞0．05)。结论三氧化二砷可有效抑制PC-3细胞增殖,诱导PC-3细胞凋亡,这一过程与三氧化二砷抑制PC- 3细胞中bcl-2的表达有关。     

法舒地尔对前列腺癌PC3细胞增殖与凋亡的影响

目的 观察法舒地尔对人前列腺癌PC3细胞增殖和凋亡的影响及作用机制.方法 不同浓度法舒地尔、顺铂及两药联合干预PC3细胞,MTT法检测细胞增殖情况,流式细胞术检测细胞凋亡,Western Blot法检测Rock Ⅰ、Bcl-2、Caspase-3蛋白的表达情况.结果 与对照组相比,法舒地尔、顺铂单独或联合作用PC3细胞均可抑制细胞增殖,两药联合后抑制效果更显著;法舒地尔、顺铂联合用药可明显增强PC3细胞的凋亡;凋亡相关蛋白Bcl-2表达下调,Caspase-3表达上调,法舒地尔可明显下调Rock Ⅰ蛋白表达.结论 法舒地尔可促进PC3细胞凋亡,其作用机制可能与法舒地尔抑制Rho激酶的表达有关.     

反义K-ras基因对胰腺癌细胞增殖和凋亡的影响

目的 探讨反义K-ras癌基因对胰腺癌细胞增殖和凋亡及Fas/FasL、Bcl-2、Bax表达的影响.方法 将重组逆转录病毒载体pLXSN转染包装细胞PT-67,获得重组逆转录病毒.在细胞和动物水平将该重组逆转录病毒分别感染PC-3和BxPC-3胰腺癌细胞,经G418筛选获得稳定细胞系,应用MTT、流式细胞仪和免疫组化法分别研究其增殖、凋亡及其相关基因表达情况.结果 成功制备含反义K-ras基因的重组逆转录病毒.感染含反义K-ras基因重组病毒后,胰腺癌PC-3细胞和移植瘤(有K-ras基因第12密码子点突变GGT→GTT)增殖受到抑制,G<,0/1>期细胞增加而S期细胞明显减少,细胞凋亡增加.免疫组化显示含反义K-ras癌基因逆转录病毒感染后PC-3细胞Bax/Bcl-2比值升高,Fas表达上调.结论 反义K-ras基因可使胰腺癌细胞及移植瘤增殖受到抑制,并可通过上调Bax/Bcl一2比值和(或)促进Fas表达诱导细胞凋亡.     

Dichloroacetate (DCA) sensitizes both wild-type and over expressing Bcl-2 prostate cancer cells in vitro to radiation

BACKGROUND: Bcl-2 protects cells from apoptosis and provides a survival advantage to cells over-expressing this oncogene. In addition, over expression of Bcl-2 renders cell resistant to radiation therapy. Recently, dichloroacetate (DCA) was proven to potentiate the apoptotic machinery by interacting with Bcl-2. In this study, we investigated whether treating human prostate cancer cells with DCA could modulate Bcl-2 expression and if the modulation in Bcl-2 expression could render the Bcl-2 over expressing cells more susceptible to cytotoxicity effects of radiation. METHODS: PC-3-Bcl-2 and PC-3-Neo human prostate cancer cells treated with DCA in addition to irradiation were analyzed in vitro for changes in proliferation, clonogenic survival, apoptosis, cell cycle phase distribution, mitochondrial membrane potential, and expression of Bcl-2, Bcl-xL, Bax, or Bak proteins. RESULTS: DCA alone produced significant cytotoxic effects and was associated with G1 cell cycle arrest. Furthermore, DCA was associated with an increased rate of apoptosis. The combination of DCA with irradiation sensitized both cell lines to radiation's killing effects. Treatment of PC-3-Bcl-2 or PC-3-Neo with DCA and irradiation resulted in marked changes in various members of the Bcl-2 family. In addition, DCA therapy resulted in a significant change in mitochondria membrane potential, thus supporting the notion that DCAs effect is on the mitochondria. CONCLUSIONS: This is the first study to demonstrate DCA can effectively sensitize wild-type and over expressing Bcl-2 human prostate cancer cells to radiation by modulating the expression of key members of the Bcl-2 family. Together, these findings warrant further evaluation of the combination of DCA and irradiation.     

龙葵碱对前列腺癌细胞系PC-3的体外抑制作用

目的:探讨龙葵碱对雄激素非依赖型人前列腺癌PC-3细胞的体外抑制作用及其机制。方法:分别用0、30、40、50μg/ml浓度的龙葵碱作用PC-3细胞,12、24、48 h后应用CCK-8法检测细胞生长活性、24 h后流式细胞仪测定细胞周期及细胞凋亡变化,荧光显微镜观察细胞凋亡,24 h后应用Western印迹方法检测细胞内IкBα和Bcl-2蛋白的表达。结果:龙葵碱能显著抑制PC-3细胞的生长,呈剂量与时间依赖性,不同浓度龙葵碱组之间与不同作用时间组之间的差异具有显著性意义(P均<0.05)。龙葵碱诱导PC-3细胞出现S期阻滞(P<0.05),各浓度组凋亡细胞比例均高于对照组,差异有显著意义(P均<0.05);不同浓度龙葵碱作用后,可以上调细胞内IкBα蛋白表达,下调Bcl-2蛋白的表达。结论:龙葵碱可以通过抑制PC-3细胞增殖、诱导凋亡、活化PC-3细胞中IкBα蛋白以及抑制Bcl-2蛋白表达等机制发挥抗前列腺癌作用。     

Omi/HtrA2对前列腺癌细胞的促凋亡作用

目的检测人前列腺癌细胞（PC-3M）中Omi／HtrA2的表达情况，并构建其小干扰RNA（siRNA）表达载体。探讨Omi／HtrA2对PC-3M凋亡的影响。方法以细胞免疫组织化学和逆转录-聚合酶链反应（RT-PCR）法检测Omi／HtrA2在前列腺癌细胞系（PC-3M）和正常前列腺细胞中的表达。利用软件辅助设计Omi／HtrA2特异性siRNA序列。体外合成后将其克隆入真核表达载体psiRNA-hHlneo。以脂质体法转染psiRNA-Omi／HtrA2载体至PC-3M中，以RToPCR和Western blot法检测psiRNA-Omi／HtrA2对Omi／HtrA2转录和表达的沉默效应。用噻唑蓝（MTT）比色法和流式细胞法检测siRNA导致Omi／HtrA2基因沉默后。PC-3M细胞凋亡的变化。结果细胞免疫组织化学和RT-PCR均显示Omi／HtrA2在PC3M细胞中高表达。酶切和DNA测序证实合成的siR-NA基因序列正确。并已被准确克隆入psiRNA-hHlneo载体中。psiRNA-Omi／HtrA2载体可特异性抑制PC3M细胞中Omi／HtrA2的表达。转染psiRNA-Omi／HtrA2载体的PC-3M细胞凋亡下调。结论促凋亡因子Omi／HtrA2可导致前列腺癌细胞凋亡，Omi／HtrA2的表达对前列腺癌的发展有重要作用。     

The role of survivin and Bcl-2 in zinc-induced apoptosis in prostate cancer cells

ObjectivesTo study the effects of zinc treatment on the gene expression levels of survivin and Bcl-2 in prostate cancer cells.Materials and methodsThe effects of zinc exposure on apoptosis were assessed using two human prostate cancer cell lines, LNCaP and PC-3. Zinc-induced apoptosis was measured by Annexin V staining. The direct effect of zinc on the expression levels of zinc transporters (ZnT-1 and ZnT-4) and apoptosis-related genes (Bax, Bcl-2, and survivin) was determined by RT-PCR analysis.ResultsWhen LNCaP and PC-3 cells were exposed to various concentrations of zinc sulfate for 48 hors, their growth was inhibited in a dose-dependent manner. The levels of zinc in both cell lines treated with zinc sulfate for 24 hours were higher than in untreated cells. Exposure to zinc induced apoptosis and necrosis in LNCaP and PC-3 cells. Apoptosis became more extensive as the treatment time with zinc increased. There was a significant increase in the gene expression levels of ZnT-1 and ZnT-4 in both cell lines treated with zinc sulfate compared with untreated cells. The expression of Bax mRNA was up-regulated, while the expression of Bcl-2 and survivin were decreased in both cell lines following zinc treatment.ConclusionsExposure to zinc sulfate in human prostate cancer cells increased intracellular levels of zinc, which resulted in increased apoptosis. The apoptogenic effect of elevated concentration of zinc could be due either to increased expression of zinc transporters and increased levels of Bax or decreased Bcl-2 and survivin expression.     

Apigenin drives the production of reactive oxygen species and initiates a mitochondrial mediated cell death pathway in prostate epithelial cells

BACKGROUND: Phytoestrogens may reduce tumorigenesis in prostate cancer. We screened five phytoestrogens for their effect on cell growth and apoptosis in PWR-1E, LNCaP, PC-3, and DU145 prostate epithelial cells in vitro. METHODS: We assessed cell number, proliferation, and apoptosis using crystal violet assays, flow cytometric analysis, and TUNEL. Focusing specifically on apigenin we assessed the ability of calpain, serine protease, caspase, estrogen receptor, and ceramide synthase inhibitors to block apigenin induced apoptosis. We also analyzed caspase 3, 7, 8, 9, Bcl-2, Bax, Bid, and cytochrome C by Western analysis, and mitochondrial permeability and reactive oxygen species production by flow cytometry using mitosensor(TM) and DCFH-DA, respectively. RESULTS: Apigenin and silybinin significantly reduced cell number, with apigenin inducing apoptosis in PWR-1E, LNCaP, PC-3, and DU145 cells. The PC-3 and DU145 cells were less susceptible to apigenin induced apoptosis then LNCaP and PWR-1E cells. The induction of apoptosis by apigenin was caspase dependent. Apigenin generated reactive oxygen species, a loss of mitochondrial Bcl-2 expression, mitochondrial permeability, cytochrome C release, and the cleavage of caspase 3, 7, 8, and 9 and the concomitant cleavage of the inhibitor of apoptosis protein, cIAP-2. The overexpression of Bcl-2 in LNCaP B10 cells reduced the apoptotic effects of apigenin. CONCLUSIONS: Apigenin induces cell death in prostate epithelial cells using a mitochondrial mediated cell death pathway. Bcl-2 has a role in inhibiting apigenin induced cell death in prostate epithelial cells.     

白花丹素体外诱导前列腺癌PC-3细胞凋亡的研究

目的 探讨白花丹素对前列腺癌PC-3细胞增殖、凋亡的作用及其和RelA(p65)表达的关系.方法 应用不同浓度梯度的白花丹素(1、5、1O、15、20 μmol/L)共同培养PC-3细胞24、48 h,噻唑蓝(MTT)比色法检测PC-3细胞增殖活力,双染流式细胞仪检测凋亡细胞,透射电镜观察超微病理变化,计算药物半数抑制浓度(IC50).逆转录-聚合酶链反应(RT-PCR)法扩增检测RelA(p65).结果 24 h组在10～20 μmol/L,48 h组在5～20 μmol/L时均出现生长抑制,IC50分别为12.88、3.71 μmol/L.双染流式细胞仪检测显示PC-3随作用浓度的上升凋亡率增加并呈现浓度依赖关系.透射电镜观察作用后PC-3呈现典型凋亡表现.RT-PCR结果提示其细胞凋亡率同Rel A(p65)表达呈负相关.结论 白花丹素体外实验可能通过抑制Rel A(p65)表达诱导PC-3的凋亡.     

Taxol synergizes with antioxidants in inhibiting hormal refractory prostate cancer cell growth

Taxanes are chemotherapeutic agents commonly used to treat various carcinomas. Dietary antioxidants, such as vitamin E, green tea extracts, and isoflavones have been used against prostate cancer, and exhibit anticancer effects both in vitro and in vivo. We evaluated the combined effect of taxol (paclitaxel) with pyrrolidine dithiocarbamate, vitamin E, epigallocatechin gallate, and genistein in killing hormone-refractory prostate cancer cells. Those agents were tested on the hormone-refractory prostate cancer cell line PC-3, and the viability of the cells was determined using MTT {3 (4, 5-dimethylthiazo-2-yl)-2, 5-diphenyl tetrazolium} assay after drug treatment. PC-3 cells were sensitive to these drugs with 50% inhibitory concentrations of 0.1, 23, 220, 1122, and 260 microM, for taxol, pyrrolidine dithiocarbamate, epigallocatechin gallate, genistein, and vitamin E, respectively. Genistein, pyrrolidine dithiocarbamate, and epigallocatechin gallate showed synergistic cytotoxicity to PC-3 cells when combined with 0.01 microM taxol. Only high concentration of vitamin E showed a synergistic effect with this dose of taxol. Further study revealed that 3 combinations could induce sub-G1 phase of cell cycle, induce apoptosis, and increase caspase activity and decrease Bcl-2 expression simultaneously. In conclusion, in addition to vitamin E, incorporation of these antioxidants with taxan-based cytotoxic therapies offers encouraging strategies for combating hormone-refractory prostate cancers.     

刺参黏多糖诱导人肝癌细胞凋亡的实验研究

目的 观察刺参酸性黏多糖(SJAMP)体外诱导人肝癌细胞HepG2凋亡的情况,并初步探讨SJAMP对HepG2细胞中Bcl-2和nm23-H1表达有何作用,为其能否应用于肝癌的临床治疗提供理论依据和可行性评估.方法 体外培养人肝癌细胞HepG2,用不同浓度的刺参黏多糖(0.25、0.5、1.0、2.0、4.0g/L)培养人肝癌细胞HepG2.采用细胞毒试验(MTT法)检测HepG2细胞抑制率,蛋白印迹法(western blot)检测相关蛋白Bcl-2和nm23-H1 的变化. 结果 (1)MTT细胞毒试验证实SJAMP能明显抑制人肝癌细胞HepG2细胞的生长,且呈时间和浓度依赖性.(2)western blot试验中,与空白组相比,SJAMP处理组、对照组(5-FU)及共同作用组HepG2细胞中Bcl-2蛋白表达均明显降低(P<0.05),nm23-H1蛋白的表达则明显升高(P<0.05). 结论 (1)SJAMP可通过抑制细胞增生并诱导凋亡来抑制人肝癌细胞HepG2的生长;(2)SJAMP可诱导人HepG2细胞中Bcl-2和nm23-H1蛋白含量的改变来发挥其抗肿瘤作用.     

肿瘤坏死因子相关凋亡诱导配体对Omi/HtrA2不同表达水平前列腺癌细胞的促凋亡作用

目的 观察肿瘤坏死因子相关凋亡诱导配体(TRAIL)对前列腺癌细胞(PC-3M)不同丝氨酸蛋白酶Omi/HtrA2表达水平的促凋亡作用.方法 构建其小分子干扰RNA(siRNA)表达载体,辅助设计Omi/HtrA2特异性siRNA序列.合成后克隆入真核表达载体psiRNA-hH1neo.脂质体法转染psiRNA-Omi/HtrA2载体至PC-3M中,检测Omi/HtrA2在PC-3M细胞中的表达及psiRNA-Omi/HtrA2对Omi/HtrA2沉默效应后的转录和表达.用原位末端转移酶标记技术检测Omi/HtrA2基因沉默后,计算不同浓度TRAIL(50、100、200、500 μg/L)下PC-3M细胞凋亡指数(AI).结果 Omi/HtrA2在PC-3M细胞中高表达.酶切和DNA测序证实siRNA基因序列正确,且准确克隆入psiR-NA-hH1neo载体中.psiRNA-Omi/HtrA2载体可特异性抑制PC-3M细胞中Omi/HtrA2的表达.不同浓度TRAIL(50、100、200、500 μg/L)对转染psiRNA-Omi/HtrA2载体后PC-3M细胞AI分别为7.23、14.87、22.65、31.78.而未转染组分别为15.28、24.17、36.33、47.76.两组之间差异有统计学意义(P<0.05).结论 Omi/HtrA2在前列腺癌细胞凋亡过程中起重要作用,TRAIL促进前列腺癌细胞的凋亡,其效果与TRAIL浓度及Omi/HtrA2表达水平相关.