醋酸棉酚对Raji细胞增殖和凋亡的影响

目的 观察醋酸棉酚对人Burkitt淋巴瘤细胞株Raji细胞增殖和凋亡的影响.方法 采用台盼蓝染色和噻唑蓝(MTT)法观察醋酸棉酚对Raji细胞生长存活的影响,瑞氏染色法观察药物处理后细胞形态学变化,琼脂糖凝胶电泳和Annexin V-FITC标记流式细胞仪检测细胞凋亡,流式细胞仪分析细胞周期、检测细胞凋亡率及Bcl-2蛋白表达水平变化,比色法测定Raji细胞Caspase-3样蛋白酶活性.结果 5 μmol/L以上浓度醋酸棉酚能抑制Raji细胞生长增殖并诱导其凋亡,效应与药物浓度及给药时间呈正相关.醋酸棉酚作用后,Raji细胞被阻滞于G_0/G_1期.比色法显示Caspase-3样蛋白酶活化.流式细胞仪检测到Bcl-2蛋白表达下调,且与Caspase-3活化在时间上存在同步趋势.结论 醋酸棉酚能抑制aaji细胞增殖并诱导凋亡,其原因可能与调节细胞周期及下调Bcl-2蛋白表达有关.     

苦参碱对前列腺癌PC-3M细胞生长抑制和凋亡的影响

目的:探讨苦参碱治疗前列腺癌的可行性及机制。方法:用不同药物浓度苦参碱诱导PC-3M细胞不同时间后,在相差倒置显微镜观察细胞形态;用MTT法测细胞的增殖抑制情况;用流式细胞仪(FCM)进行细胞凋亡率检测;RT-PCR法检测PC-3M细胞内bcl-2、bax基因表达水平。结果:用苦参碱干预后随着药物浓度增加PC-3M细胞株生长明显受抑制;在FCM上可见凋亡率逐渐增加;PC-3M细胞中bcl-2 mRNA表达水平逐渐下调,bax mRNA表达水平逐渐上调,且呈时间-浓度依赖性。结论:苦参碱体外能有效抑制前列腺癌细胞株生长,其机制可能与诱导细胞凋亡、下调bcl-2表达及上调bax水平有关。     

醋酸棉酚诱导膀胱癌T24细胞凋亡的研究

目的　研究棉酚对膀胱癌T2 4 细胞的抑制作用和诱导凋亡作用 ,探讨其作用机制。方法　将不同浓度的醋酸棉酚作用于人T2 4 膀胱癌细胞 ,利用MTT法检测其有效作用浓度、瑞氏染色、流式细胞仪 ,观察T2 4 细胞的凋亡情况。结果　MTT法测得其IC50 值为 12 6.3 μmol·L-1,浓度为 5 0～ 3 0 0 μmol·L-1的棉酚具有诱导T2 4 细胞凋亡的作用 ,随着药物作用时间的延长凋亡率增加。结论　棉酚抗癌作用机制之一是诱导人T2 4 膀胱癌细胞凋亡     

C反应蛋白调节bcl-2/bax蛋白表达诱导人脐静脉内皮细胞凋亡

目的观察不同浓度C反应蛋白对体外培养的人脐静脉内皮细胞（Human umbilical vein endothelial cells,hUVEC）凋亡的影响及其分子机制。方法体外培养人脐静脉内皮细胞,用吖啶橙/溴化已啶荧光染色观察凋亡细胞形态。四甲基偶氮唑蓝比色法（MTT）分别测定与不同浓度C反应蛋白（5mg/L、10mg/L、20mg/L）作用12、24、48h后hUVEC的增殖率,流式细胞仪和Western blotting分别检测与不同浓度C反应蛋白作用24h后的细胞早期凋亡率及bcl-2/bax蛋白表达水平。结果随着C反应蛋白浓度的增加,hUVEC的MTT值逐渐降低,而细胞早期凋亡率则逐渐升高。与对照组相比,24h后高C反应蛋白组MTT值明显下降（P〈0.05）,而细胞早期凋亡率显著增加（P〈0.01）。内皮细胞在高C反应蛋白作用24h后,bcl-2蛋白表达减弱,bax蛋白表达增强,它们的表达量与对照组相比差异有统计学意义（P〈0.05）。结论 C反应蛋白可能通过调节bcl-2/bax蛋白表达诱导人内皮细胞凋亡。     

β-淀粉样肽（25-35）对PC12细胞bax和bcl-2基因表达的影响

目的：观察β-淀粉样肽25-35（β-amyloid peptide 25-35,Aβ25-35）诱导PC12细胞凋亡和对bax及bcl-2基因表达的影响。方法：采用MTT法检测PC12细胞的存活率;DNA电泳法观察细胞凋亡时特异性梯状条带;Hochest33258-PI荧光染色观察细胞核形态学改变;RT-PCR检测bax和bcl-2基因mRNA表达变化,Western blot检测Bax和Bcl-2蛋白表达变化。结果：随着Aβ25-35浓度的增加,PC12细胞存活率逐渐降低;DNA电泳呈凋亡特异性梯状条带;荧光染色可见细胞核碎裂、核固缩等凋亡特征;bax mRNA及Bax蛋白表达增加,bcl-2 mRNA及Bcl-2蛋白表达降低。结论：在Aβ25-35诱导PC12细胞凋亡过程中,Bax和Bcl-2可能起重要作用。     

紫草素诱导人结肠癌细胞SW620凋亡及机制研究

目的探讨紫草素诱导人结肠癌细胞株SW620凋亡及分子机制。方法体外培养人结肠癌细胞株SW620,加入终浓度分别为2.5～15μmol/L的紫草素。采用MTT法测定紫草素对肿瘤细胞的增殖抑制率,Annexin V-FITC/PI双标法检测细胞凋亡率,Western blot方法测定对bcl-2、bax蛋白表达水平。结果紫草素随时间和浓度的增加对SW620细胞增殖抑制率增加,细胞凋亡率增加（P〈0.05）。Western blot法检测发现bax蛋白表达升高同时bcl-2蛋白表达下降。结论紫草素有抑制结肠癌细胞增殖和诱导凋亡的作用,可以通过调控bax和bcl-2蛋白的表达经线粒体途径诱导细胞凋亡。     

洛铂对SKOV3细胞凋亡及bax、bcl-2基因表达的影响

目的研究洛泊对体外培养的浆液性卵巢癌细胞SKOV3凋亡作用及探讨其对凋亡基因bcl-2和bax表达的影响。方法体外培养卵巢癌细胞SKOV3,用MTT比色法检测洛铂对SKOV3细胞株的增殖抑制作用以及流式细胞仪检测洛铂对SKOV3细胞株的凋亡率,流式细胞仪检测凋亡相关蛋白bax、bcl-2的表达。结果体外培养卵巢癌SKOV3细胞经不同浓度洛泊处理后细胞生长明显受到抑制,洛泊作用于卵巢癌SKOV3细胞可诱导细胞的凋亡,同时,随着洛铂浓度的增加,bax基因的表达增加,而bcl-2表达减少。结论卵巢癌SKOV3细胞对洛泊具有药物敏感性,洛泊可诱导卵巢癌细胞的凋亡,bax蛋白的表达增加和bcl-2蛋白表达的减少可能是洛泊诱导卵巢癌细胞的凋亡机制之一。     

一种新型含硒化合物诱导PC-3前列腺癌细胞凋亡及其体内抑瘤作用的研究

目的　探讨新型含硒化合物BBSKE(1,2 [二 (1,2 苯并异硒唑 3(2H) 酮 ) ]乙烷 )对PC 3前列腺癌细胞的增殖及凋亡的影响 ,观察其对小鼠前列腺癌的体内抑瘤作用。方法　培养PC 3前列腺癌细胞 ,用MTT法检测了不同浓度的BBSKE对其增殖的影响 ,用荧光显微镜、DNA电泳和流式细胞仪观察BBSKE对细胞凋亡的诱导作用 ,并检测BBSKE对PC 3细胞bcl 2和bax蛋白表达水平及半胱氨蛋白水解酶 3活性的影响。用TRAMP C2小鼠前列腺癌细胞皮下注射C5 7BL/ 6小鼠 ,建立小鼠前列腺癌模型 ,观察BBSKE在小鼠体内的抗前列腺癌作用。结果　BBSKE可以显著抑制PC 3细胞的体外增殖 ,其 4 8h的IC50 值为 17 90 μmol/L ,而阳性对照组顺铂为 15 0 μmol/L。同时BBSKE可以诱导PC 3细胞凋亡 ,2 0 μmol/L的BBSKE作用PC 3细胞 4 8h凋亡发生率达 2 6 32 % ,显著高于未经处理的对照组的 1 75 % (P <0 0 1)。细胞中bcl 2表达减低 ,bax表达无明显变化 ,半胱氨蛋白水解酶 3活性显著增高。动物实验也表明其对小鼠体内前列腺癌的生长有抑制作用 ,抑瘤率达 4 0 % ,顺铂对照组为 4 8%。结论　新型含硒化合物BBSKE可以抑制PC 3细胞增殖并促进其凋亡 ,其作用可能是通过降低细胞内的bcl 2 ,增加半胱氨蛋白水解酶 3活性而实现的 ;在前列腺癌的动物模     

莪术油注射液通过上调bax基因下调bcl-2基因诱导人子宫内膜癌细胞(HEC-1-B)凋亡

目的:探究莪术油注射液通过上调bax基因下调bcl-2基因诱导人子宫内膜癌细胞(HEC-1-B)凋亡的机制。方法:用不同浓度的莪术油注射液处理人子宫内膜癌细胞(HEC-1-B),MTT法检测不同时间段HEC-1-B细胞的凋亡率,Real Time RT-PCR检测不同浓度处理后bax基因和bcl-2基因转录的mRNA的表达情况。结果:随着莪术油注射液浓度增高和时间的延长,HEC-1-B细胞的凋亡率逐渐增高,比较差异均有统计学意义(P0.05);随着浓度的增高bax基因mRNA表达水平逐渐增高,bcl-2基因表达水平逐渐降低(P0.05)。结论:莪术油注射液通过上调bax基因,下调bcl-2基因促进人子宫内膜癌细胞(HEC-1-B)凋亡,剂量越大,时间越长,促凋亡作用越明显。     

螺旋藻多糖诱导BEL7404细胞凋亡的研究

目的：研究螺旋藻多糖对肝癌细胞凋亡的影响,以探讨其抗肝癌的机制。方法：以不同浓度（300、500、1000mg/L）的螺旋藻多糖处理BEL7404细胞,用倒置显微镜观察BEL7404细胞的形态变化;并以流式细胞仪测定BEL7404细胞的凋亡情况;免疫细胞化学法检测螺旋藻多糖处理BEL7404细胞后凋亡相关蛋白bax、bcl-2、Apaf-1表达的变化。结果：在形态学观察试验中,螺旋藻多糖使BEL7404细胞24h后出现凋亡,其凋亡率随着浓度的增加而增加;螺旋藻多糖也可使凋亡相关蛋白bcl-2表达降低,bax、Apaf-1蛋白表达增加。结论：螺旋藻多糖具有诱导肿瘤细胞凋亡作用,其作用机制可能是通过下调bcl-2蛋白表达,上调bax、Apaf-1表达来诱导细胞凋亡。     

3,3-diindolylmethane enhances the inhibitory effect of idarubicin on the growth of human prostate cancer cells

OBJECTIVE: To study the effects of idarubicin (IDA) combined with 3, 3-diindolylmethane (DIM) on the growth inhibition of human prostate cancer cells. METHODS: Human prostate cancer cells of the line PC-3M were cultured and then divided into the following groups: control group with solvent added into the culture fluid; IDA groups, with IDA of the terminal concentrations of 0.5, 1 or 5 mg/L added into the culture fluid; DIM groups, with DIM of the terminal concentrations of 30, 60 or 100 micromol/L added into the culture fluid; and DIM + IDA groups, with 0. 5 mg/L IDA and DIM 30, 60 or 100 micromol/L added into the culture fluid. 48 h later the cell growth inhibition rate was detected by MTT assay. Flow cytometry and acridine orange staining were used to detect the cell cycle and apoptosis. RT-PCR and Western blotting were used to detect the mRNA and protein expression of caspase 9, an apoptosis gene. RESULTS: Both IDA and DIM dose-dependently inhibited the growth of the PC-3M cells. The growth inhibition rate of the 60 micromol/L DIM + 0.5 mg/L IDA group was 69.9%, almost 10 times as that of the 0.5 mg/L IDA group. The apoptosis rate of the 60 micromol/L DIM + 0. 5 mg/L IDA group was 47.0%, significantly higher than that of the 0.5 mg/L IDA group (3.2%, P < 0.05). RT-PCR and Western blotting showed that the combination of DIM and IDA significantly enhanced the mRNA and protein expression of caspase 9. CONCLUSION: DIM enhances the growth inhibition effect of IDA on human prostate cancer cells by the mechanism of induction of apoptosis.     

DIM增强去甲氧柔红霉素对人前列腺癌细胞生长的抑制作用

目的 观察3,3-二吲哚基甲烷(DIM)与去甲氧柔红霉素(IDA)联合应用对人前列腺癌细胞(PC-3M)的生长抑制的作用并探讨其机制.方法 应用MTT法检测生长抑制率;流式细胞术及吖啶橙染色分析PC-3M细胞凋亡及细胞周期变化;分别用RT-PCR和Western印迹检测凋亡相关的半胱氨酸蛋白水解酶9(caspase 9)基因和蛋白的表达.结果 0.5 mg/L的IDA与60 μmol/L的DIM联用,使0.5 mg/L的IDA对肿瘤细胞生长抑制率由27.8%提高到69.9%;诱导凋亡的效应由3.2%提高到47.0%,相当10倍剂量(5 mg/L)IDA产生的效应.RT-PCR和Western印迹结果显示,两药联用明显增强caspase 9基因和蛋白的表达水平.结论 DIM能显著增强IDA对PC-3M细胞的生长抑制作用,其机制与凋亡诱导效应有关.     

人参皂苷Rg3对人宫颈癌Hela细胞凋亡及Bcl-2/bax基因mRNA表达的影响

目的探讨人参皂苷Rg3对人宫颈癌Hela细胞凋亡的影响及对凋亡相关基因的作用。方法培养人宫颈癌Hela细胞,用不同浓度Rg3进行干预,用Giemsa染色观察细胞形态学改变,流式细胞仪方法定量检测细胞的凋亡及细胞周期的变化,用RT-PCR法检测凋亡相关基因Bcl-2/bax表达。结果 Rg3对Hela细胞增殖的抑制率随作用时间的延长和药物浓度的增加而增加;Rg3作用后Hela细胞出现了典型的凋亡形态学变化,可见凋亡小体;不同浓度的Rg3处理细胞48 h后,流式细胞术(FCM)显示细胞的凋亡呈剂量依赖性;同时细胞被阻断在G2/M期,细胞周期发生明显改变;Rg3作用后的Hela细胞的凋亡相关基因Bcl-2表达降低,bax基因表达升高。结论 Rg3能抑制Hela细胞增殖,诱导其凋亡,且Rg3诱导Hela细胞凋亡是通过下调Bc1-2表达和上调bax表达,而达到抗肿瘤的作用。     

Induction of SiHa Cells Cells Apoptosis by Nanometer Realgar Suspension and Its Mechanism

The effects of nanometer realgar suspension on proliferation and apoptosis of human uterine cervix cancer cell line SiHa cells and oncogenic genes HPV16E6/E7 were investigated. A "micro-jet efflux" strategy was used for the preparation of nanometer realgar suspension. SiHa cells were treated with nanometer Realgar suspension in various concentrations (6.25,12.5,25 and 50mg/L) for different durations (12,24,48 and 72h). The inhibitive effect of nanometer realgar suspension on growth of SiHa cells was detected by MIT method. Special morphological changes of apoptosis were observed by transmission electron microscopy (TEM) and DNA fragments electrophoresis. The apoptotic rate was quantified by flow cytometry (FCM). The expression of HPV16E6/E7 mRNA and protein was assayed by RT-PCR and Western blot respectively. The results showed after being treated with 25-50mg/L nanometer realgar suspension for 48h, the survival rate of SiHa cells was decreased, and apoptotic rate markedly increased in a time- and concentration-dependent manner. TEM and DNA electrophoresis revealed the special morphological changes of apoptosis. The apoptotic rate of SiHa cells treated with nanometer realgar suspension was significantly higher than in the control group (P<0.01), and G0/G1 phase arrest appeared following treatment with nanometer realgar suspension in 25 and 50mg/L for 48h.RT-PCR and Western blot assay indicated that nanometer realgar suspension reduced the HPV16E6/E7 gene expression. Nanometer realgar suspension could inhibit the proliferation and induce apoptosis of SiHa cells. The mechanism may be related to the down-regulation of the HPV16E6/E7 gene expression.     

Induction of SiHa Cells Apoptosis by Nanometer Realgar Suspension and Its Mechanism

The effects of nanometer realgar uterine cervix cancer cell line SiHa cells and suspension on proliferation and apoptosis of human oncogenic genes HPV16E6/E7 were investigated. A ＂micro-jet effiux＂ strategy was used for the preparation of nanometer realgar suspension. SiHa cells were treated with nanometer Realgar suspension in various concentrations （6.25, 12.5, 25 and 50 mg/L） for different durations （12, 24, 48 and 72 h）. The inhibitive effect of nanometer realgar suspension on growth of SiHa cells was detected by MTT method. Special morphological changes of apoptosis were observed by transmission electron microscopy （TEM） and DNA fragments electrophoresis. The apoptotic rate was quantified by flow cytometry （FCM）. The expression of HPV 16E6/E7 mRNA and protein was assayed by RT-PCR and Western blot respectively. The results showed after being treated with 25--50 mg/L nanometer realgar suspension for 48 h, the survival rate of SiHa cells was decreased, and apoptotic rate markedly increased in a time- and concentration-dependent manner. TEM and DNA electrophoresis revealed the special morphological changes of apoptosis. The apoptotic rate of SiHa cells treated with nanometer realgar suspension was significantly higher than in the control group （P〈0.01）, and G0/G1 phase arrest appeared following treatment with nanometer realgar suspension in 25 and 50 mg/L for 48 h. RT-PCR and Western blot assay indicated that nanometer realgar suspension reduced the HPV16E6/E7 gene expression. Nanometer realgar suspension could inhibit the proliferation and induce apoptosis of SiHa cells. The mechanism may be related to the down-regulation of the HPV16E6/E7 gene expression.     

姜黄素联合多烯紫杉醇诱导PC-3细胞凋亡的实验研究

目的探讨姜黄素联合多烯紫杉醇对人前列腺癌PC-3细胞凋亡的影响及其作用机制。方法将体外培养的PC-3细胞分为对照组(仅加培养基)、姜黄素组(5.0μmol/L姜黄素处理)、多烯紫杉醇组(2.5nmol/L多烯紫杉醇处理)及联合组(5.0μmol/L姜黄素与2.5nmol/L多烯紫杉醇联合处理),作用24h。用流式细胞仪分析PC-3细胞凋亡率,逆转录聚合酶链反应(RT-PCR)和Western blot法分别检测Bcl-2及Bax mRNA和蛋白的表达情况。结果姜黄素和多烯紫杉醇均可诱导PC-3细胞凋亡,二者联合用药组的细胞凋亡率明显高于单药组(P<0.05);RT-PCR及Western blot显示姜黄素和多烯紫杉醇都可明显下调Bcl-2mRNA和蛋白的表达率,而上调Bax mRNA和蛋白表达率,且联合组细胞Bax与Bcl-2表达的改变更明显。结论姜黄素和多烯紫杉醇可能通过下调Bcl-2,上调Bax的表达协同诱导PC-3细胞的凋亡。     

DAPT抑制RM-1细胞增殖的实验研究

目的研究Notch信号通路特异性阻断剂DAPT对小鼠前列腺癌RM-1细胞增殖的影响。方法体外培养RM-1细胞,实验组以不同浓度DAPT（0.25、0.5、1、2、5μmol/L）处理,对照组不加DAPT;利用MTT法检测细胞增殖,流式细胞术检测细胞周期（PI法）,RT-PCR法检测Notch1、Jagged1基因表达。结果与对照组比较,0.25μmol/L剂量组对RM-1细胞增殖、周期、Notch1及Jagged1 mRNA表达的影响无差异;0.5、1、2、5μmol/L剂量组均能显著抑制RM-1细胞增殖,随着DAPT浓度的增加,G0/G1期细胞比例逐渐增多,S期细胞比例逐渐减少,G2/M期细胞比例无明显差异,Notch1、Jagged1 mRNA的表达逐渐下调。结论当DAPT浓度≥0.5μmol/L时能够抑制RM-1细胞的增殖,且呈剂量依赖性,其机制可能与诱导细胞G0/G1期阻滞、Notch1及Jagged1 mRNA的表达下调有关。     

ZM-66, a New Podophyllotoxin Derivative Inhibits Proliferation and Induces Apoptosis in K562/ADM Cells

Objective To investigate the anti-tumor effect of ZM-66 on multidrug-resistant leukemic cell line K562/ADM. Methods The K562/ADM cells were treated with varying concentrations （0, 1, 2, 4×10^-3 mmol/L） of ZM-66 or etoposide for 24 hours. The proliferation was detected by Sulforhodamine B Sodium Salt （SRB） assay and apoptosis was detected by flow cytometry analysis and fluorescent staining. In addition, the expression levels of p53 and bax genes in K562/ADM cells were detected by RT-PCR analysis. The level of P-glycoprotein （P-gp）, P53 and Bax protein in K562/ADM cells were detected by Western blot assay. Results SRB assay demonstrated that etoposide had little inhibitory effect on K562/ADM cells, whereas ZM-66 （1, 2, 4×10^-3 mmol/L） had significantly inhibitory effect on K562/ADM cells （all P〈0.01）. The acridine orange/propidium iodide dual staining showed that there were typical condensation of chromatin and nuclear fragmentation nuclei with red color in ZM-66 treated cells. Flow cytometric analysis showed that there was a significantly increase of apoptotic cells i~ K562/KDM cells after treated with ZM-66. RT-PCR showed that the p53 and bax mRNA expression levels in K562/ADM cells treated with ZM-66 at 1, 2, 4×10^-3 mmol/L were higher than those in the cell without treatment. Western blot showed that the P53 and Bax protein expression levels in K562/ADM cells treated with ZM-66 at 2, 4x 10 s mmol/L were higher than those in the cell without treatment. But the P-gp protein expression level in K562/ADM cells treated with ZM-66 at 2, 4×10^-3 mmol/L was gradually lower than those in the cell without treatment. Conclusion ZM-66 is able to induce cell death by apoptosis in vitro, as a result of the reverse of theapoptosis resistance in drug-resistant K562/ADM cells by modulating expression of key factors associated with apoptosis induction.     

小鼠胚胎干细胞分泌因子对前列腺癌细胞作用的体外研究

目的 研究小鼠胚胎干细胞(ESC)分泌因子对前列腺癌细胞RM-1生物学特性的影响,并探讨其作用机制。方法 采用Transwell小室在体外建立ESC联合小鼠胚胎成纤维细胞(MEF)与RM-1细胞的非接触式共培养体系作为实验干预(实验组),同时建立MEF与RM-1细胞的共培养体系作为阴性对照(对照组)。共培养72 h后,检测实验组与对照组RM-1细胞的增殖水平,比较两组细胞的形态学、细胞周期、凋亡水平、迁移与侵袭能力的差异。结果 与对照组比较,实验组RM-1细胞的形态表现为排布稀疏,分裂减少,死亡增多,部分细胞呈现凋亡迹象;实验组RM-1细胞增殖减慢(P<0.01),细胞周期存在G₁→S期阻滞且凋亡增加,以晚期凋亡为主(P均<0.01);实验组RM-1细胞的迁移和侵袭能力减弱(P均<0.05)。结论 ESC分泌因子可通过阻滞RM-1细胞周期、促进其凋亡使RM-1细胞的增殖减慢,同时减弱其迁移与侵袭能力而发挥抗肿瘤作用。