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老年女性乳癌组织中Bcl-2蛋白表达及临床意义
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作者 姜楠 王欣 +2 位作者 马萍 张国芬 李向利 《青岛大学学报(医学版)》 CAS 2024年第4期513-517,共5页
目的探讨B细胞淋巴瘤-2(Bcl-2)在老年女性乳癌组织中的表达及其与病人临床病理特征和预后的关系。方法采用免疫组织化学方法检测92例老年女性乳癌组织中Bcl-2蛋白的表达,分析Bcl-2蛋白在老年女性乳癌组织中表达与病人临床病理特征及预... 目的探讨B细胞淋巴瘤-2(Bcl-2)在老年女性乳癌组织中的表达及其与病人临床病理特征和预后的关系。方法采用免疫组织化学方法检测92例老年女性乳癌组织中Bcl-2蛋白的表达,分析Bcl-2蛋白在老年女性乳癌组织中表达与病人临床病理特征及预后的关系。结果Bcl-2蛋白在老年女性乳癌组织中的阳性表达率为80.4%。Bcl-2的表达与肿瘤大小、淋巴结转移、TNM分期、组织学分级和脉管瘤栓相关(χ^(2)=4.459~11.607,P<0.05)。分子特征分析结果显示,Bcl-2表达与病人的雌激素受体、人表皮生长因子受体-2表达和分子分型相关(χ^(2)=14.572~19.390,P<0.05)。生存分析显示,Bcl-2的表达与病人无进展生存率及总生存率无关(P>0.05)。结论检测Bcl-2蛋白的表达对于判断老年女性乳癌预后和指导治疗具有临床参考价值。 展开更多
关键词 乳腺肿瘤 老年人 基因 bcl-2 预后 免疫组织化学 病理学 临床
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基于caspase-3/Bcl-2/Bax信号通路探究SMAC基因对肺腺癌细胞紫杉醇敏感度及细胞活性的影响 被引量:4
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作者 陈康 陈颖 +2 位作者 牛宗新 康莉 祖里培亚·艾拜都拉 《肿瘤防治研究》 CAS 2023年第4期357-363,共7页
目的基于caspase-3/Bcl2/Bax信号通路探究SMAC基因对肺腺癌细胞紫杉醇敏感度及细胞活性的影响。方法建立肺腺癌紫杉醇耐药细胞株A549/Taxol,将细胞分为pcDNANC组(转染pcDNA-NC空白载体)、pcDNA-SMAC组(转染pcDNA-SMAC载体)、siRNA-NC组... 目的基于caspase-3/Bcl2/Bax信号通路探究SMAC基因对肺腺癌细胞紫杉醇敏感度及细胞活性的影响。方法建立肺腺癌紫杉醇耐药细胞株A549/Taxol,将细胞分为pcDNANC组(转染pcDNA-NC空白载体)、pcDNA-SMAC组(转染pcDNA-SMAC载体)、siRNA-NC组(转染siRNANC空病毒载体)和siRNA-SMAC组(转染siRNA-SMAC慢病毒载体)。qRT-PCR法检测细胞中SMAC mRNA表达;MTT法检测细胞敏感度;克隆实验法检测细胞增殖能力;Transwell法检测细胞侵袭能力;流式细胞术检测细胞凋亡能力;Western blot法检测细胞中caspase-3、Bcl-2和Bax蛋白表达。结果肺腺癌A549细胞较BEAS-2B正常细胞中SMAC mRNA表达明显降低(P<0.05)。pcDNA-SMAC组较pcDNA-NC组细胞中SMAC mRNA表达显著升高(P<0.05)。和siRNA-NC组相比,siRNA-SMAC组细胞中SMAC mRNA表达显著降低(P<0.05)。和pcDNA-NC组相比,pcDNA-SMAC组细胞IC_(50)、细胞克隆数、细胞侵袭能力及Bcl-2蛋白和Bcl-2/Bax比值均显著降低,细胞耐药指数逆转倍数为2.51倍,细胞凋亡能力及caspase-3和Bax蛋白表达明显高于pcDNA-NC组(P<0.05)。和siRNA-NC组相比,siRNA-SMAC组细胞IC_(50)、细胞克隆数、细胞侵袭能力及Bcl-2蛋白和Bcl-2/Bax比值均显著升高,细胞凋亡能力及caspase-3和Bax蛋白表达明显降低(P<0.05)。结论高表达SMAC可增加肺腺癌细胞的紫杉醇敏感度、抑制细胞增长和侵袭、促进细胞凋亡,且对caspase-3/Bcl-2/Bax信号通路有一定调控作用。 展开更多
关键词 caspase-3/bcl-2/Bax SMAC 肺腺癌 紫杉醇 增殖 侵袭 凋亡
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晚期胃癌患者参一胶囊联合化疗治疗前后血清Bcl⁃2、Bax、Fas与预后的相关性
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作者 徐丽君 韩毛毛 郑畅 《分子诊断与治疗杂志》 2024年第11期2046-2049,2054,共5页
目的研究晚期胃癌患者血清B细胞淋巴瘤⁃2基因(Bcl⁃2)、Bcl⁃2相关X蛋白(Bax)、自杀相关因子(Fas)与参一胶囊联合化疗治疗预后的相关性。方法选择2019年1月至2023年4月在安徽省颍上县人民医院进行参一胶囊联合化疗的72例晚期胃癌患者患者... 目的研究晚期胃癌患者血清B细胞淋巴瘤⁃2基因(Bcl⁃2)、Bcl⁃2相关X蛋白(Bax)、自杀相关因子(Fas)与参一胶囊联合化疗治疗预后的相关性。方法选择2019年1月至2023年4月在安徽省颍上县人民医院进行参一胶囊联合化疗的72例晚期胃癌患者患者并进行1年随访,随访期间存活的患者作为预后良好组(n=48)、死亡的患者作为预后不良组(n=24)。比较两组患者治疗前各项临床资料及血清Bcl⁃2、Bax、Fas水平的差异,采用logistic回归分析预后的影响因素,采用受试者工作特征(ROC)曲线分析血清Bcl⁃2、Bax、Fas对预后的预测效能。结果预后不良组晚期患者参一胶囊联合化疗治疗前的血清癌胚抗原、糖类抗原199、Bcl⁃2水平高于预后良好组,差异有统计学意义(t=4.749、5.032、6.033,P<0.05);血清Bax、Fas水平低于预后良好组,差异有统计学意义(t=5.067、7.018,P<0.05)。治疗前血清Bcl⁃2水平升高是晚期胃癌患者参一胶囊联合化疗治疗预后不良的危险因素,Bax、Fas水平升高是晚期胃癌患者参一胶囊联合化疗治疗预后不良的保护因素(P<0.05)。血清Bcl⁃2、Bax、Fas及血清Bcl⁃2+Bax+Fas均对晚期胃癌患者参一胶囊联合化疗治疗的预后具有预测价值,血清Bcl⁃2+Bax+Fas预测预后的灵敏度和特异度均为87.5%。结论血清Bcl⁃2增加、Bax和Fas降低与晚期胃癌患者参一胶囊联合化疗治疗预后不良有关,治疗前血清Bcl⁃2+Bax+Fas对预后具有预测价值。 展开更多
关键词 晚期胃癌 参一胶囊 B细胞淋巴瘤⁃2基因 bcl2相关X蛋白 自杀相关因子
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miR-204-5p靶向调控BCL2L2促进急性肝衰竭大鼠肝细胞凋亡的研究
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作者 王坤 朱传龙 +3 位作者 田健美 孔小行 成芳芳 李嫣 《医学研究杂志》 2023年第7期136-141,共6页
目的探讨miR-204-5p在急性肝衰竭大鼠肝组织中的表达情况及其促进肝细胞凋亡的的作用及潜在机制。方法根据随机数字表法将32只SD大鼠分为4组,即对照组(0h)、模型组(24、48、72h),每组8只。模型组腹腔注射D-氨基半乳糖联合脂多糖诱导急... 目的探讨miR-204-5p在急性肝衰竭大鼠肝组织中的表达情况及其促进肝细胞凋亡的的作用及潜在机制。方法根据随机数字表法将32只SD大鼠分为4组,即对照组(0h)、模型组(24、48、72h),每组8只。模型组腹腔注射D-氨基半乳糖联合脂多糖诱导急性肝衰竭,对照组为腹腔内注射等量的0.9%氯化钠溶液。分别取对照组及模型组造模完成后24、48、72h大鼠静脉血及肝组织,ELISA检测血清丙氨酸氨基转移酶(alanine aminotransferase,ALT)、天冬氨酸基转移酶(aspartate aminotransferase,AST)、总胆红素(total bilirubin,TBIL)的水平,通过HE、TUNEL染色法行肝组织病理学检查和肝细胞凋亡观察。生物信息学工具预测miR-204-5p的靶基因,采用双荧光素酶报告基因实验验证两者的靶向关系。RT-PCR和Western blot法检测肝组织中miR-204-5p、BCL2L2的表达情况。结果与对照组比较,模型组随着造模时间的延长,ALT、AST、TBIL值逐渐升高,肝组织坏死程度、炎性细胞浸润逐渐加重,肝细胞凋亡指数逐渐升高。RT-PCR结果显示,随着造模时间的延长,miR-204-5p基因的相对表达水平逐渐升高,而BCL2L2基因的相对表达水平逐渐降低;Western blot法检测结果亦显示,BCL2L2蛋白表达水平逐渐降低(P均<0.05)。miR-204-5p和BCL2L2之间存在靶向关系,miR-204-5p能够靶向调控BCL2L2表达。结论miR-204-5p可能通过靶向调控BCL2L2促进肝细胞凋亡,进而促进急性肝衰竭疾病的发生、发展。 展开更多
关键词 急性肝衰竭 微小RNA-204-5p bcl2L2 凋亡
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miR-153-3p靶向结合BCL2基因调控鼻咽癌细胞增殖、凋亡和周期的实验研究
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作者 李霞 穆建梅 +3 位作者 王志婕 闫小会 马瑞霞 陈晓平 《宁夏医学杂志》 CAS 2023年第5期385-388,F0002,共5页
目的探讨miR-153-3p调控鼻咽癌细胞增殖、凋亡和周期的作用。方法利用生物信息学软件对miR-153-3p的候选靶基因进行预测。实时荧光定量PCR和Western blotting分别检测miR-153-3p对细胞内mRNA和蛋白表达的影响。用密理博MUSETM细胞检测... 目的探讨miR-153-3p调控鼻咽癌细胞增殖、凋亡和周期的作用。方法利用生物信息学软件对miR-153-3p的候选靶基因进行预测。实时荧光定量PCR和Western blotting分别检测miR-153-3p对细胞内mRNA和蛋白表达的影响。用密理博MUSETM细胞检测仪对细胞周期和细胞凋亡情况进行检测。用CCK8法和克隆技术形成实验检测细胞增殖能力。结果生物信息学预测结果显示,miR-153-3p与BCL2分子之间存在一个高可信度的结合区。miR-153-3p mimic能上调miR-153-3p的表达,降低BCL2蛋白的表达。与对照组相比,过表达miR-153-3p的6-10B细胞的凋亡明显增加,增殖能力受到显著抑制。结论miR-153-3p通过下调BCL2的表达,能够促进鼻咽癌细胞凋亡,抑制其增殖。 展开更多
关键词 鼻咽癌 miR-153-3p bcl2基因 细胞凋亡和增殖 6-10B细胞
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基于PI3K/AKT/Bcl-2信号通路探讨加味柴胡当归汤抑制肝星状细胞纤维化的机制 被引量:1
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作者 孙素红 周晓玲 +2 位作者 李泽鹏 吴腾 孙东琪 《中国老年学杂志》 CAS 北大核心 2023年第20期5019-5023,共5页
目的探究加味柴胡当归汤对肝星状细胞纤维化的抑制作用及其通过调控磷脂酰肌醇3激酶(PI3K)/蛋白激酶B(AKT)/B细胞淋巴瘤(Bcl)-2信号通路抗肝纤维化的机制。方法培养永生化的大鼠肝星状细胞(HSC-T6),设置正常对照组(不作干预)、模型组[... 目的探究加味柴胡当归汤对肝星状细胞纤维化的抑制作用及其通过调控磷脂酰肌醇3激酶(PI3K)/蛋白激酶B(AKT)/B细胞淋巴瘤(Bcl)-2信号通路抗肝纤维化的机制。方法培养永生化的大鼠肝星状细胞(HSC-T6),设置正常对照组(不作干预)、模型组[血小板衍生生长因子(PDGF)-BB干预],中药组(PDGF-BB+含药血清干预),激动剂+中药组(PDGF-BB+HY-101625+含药血清干预),抑制剂+中药组(PDGF-BB+LY294002+含药血清干预),采取不同干预方式进行实验。使用CCK-8试剂盒和细胞凋亡试剂盒检测细胞增殖活性和凋亡水平;采用酶联免疫吸附试验(ELISA)检测细胞α-平滑肌肌动蛋白(α-SMA)、Ⅰ型胶原(COL-Ⅰ)、基质金属蛋白酶(MMP)-2、MMP-9、MMP组织抑制剂(TIMP)-1表达水平;进行Western印迹实验分析细胞中Bcl-2、Bcl-2相关X蛋白(Bax)、半胱氨酸蛋白酶(Caspase)-3、Caspase-9、哺乳动物雷帕霉素靶蛋白(mTOR)表达;利用qRT-聚合酶链反应(PCR)法测定细胞中PI3K、p-PI3K、AKT、p-AKT mRNA表达。结果与正常对照组相比,模型组细胞增殖活性、α-SMA、COL-Ⅰ、TIMP-1、Bcl-2表达及PI3K、AKT、mTOR磷酸化水平显著升高,凋亡率、MMP-2、MMP-9、Bax、Caspase-3和Caspase-9表达显著降低(P<0.05)。与模型组相比,中药组、激动剂+中药组、抑制剂+中药组细胞增殖活性、Bcl-2、α-SMA、COL-Ⅰ、TIMP-1表达及PI3K、AKT、mTOR磷酸化水平明显降低,凋亡率、MMP-2、MMP-9、Bax、Caspase-3和Caspase-9表达水平明显升高(P<0.05)。结论加味柴胡当归汤可通过调控PI3K/AKT/Bcl-2信号通路,抑制肝星状细胞活化,逆转肝纤维化进程。 展开更多
关键词 加味柴胡当归汤 肝星状细胞 肝纤维化 磷脂酰肌醇3激酶(PI3K)/蛋白激酶B(AKT)/B细胞淋巴瘤(bcl)-2信号通路 细胞外基质
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Transduction of Fas gene or Bcl-2 antisense RNA sensitizes cultured drug resistant gastric cancer cells to chemotherapeutic drugs 被引量:23
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作者 XIAO Bing, SHI Yong Quan, ZHAO Yan Qiu, YOU Han, WANG Zuo You, LIU Xian Ling, YIN Fang, QIAO Tai Dong and FAN Dai Ming 《World Journal of Gastroenterology》 SCIE CAS CSCD 1998年第5期58-62,共5页
AIM To compare the expression level of Fas gene and Bcl-2 gene in gastric cancer cells SGC7901 and gastric cancer MDR (multidrug resistant) cells SGC7901/VCR, to transduce Fas cDNA and Bcl-2 antisense nucleic acid int... AIM To compare the expression level of Fas gene and Bcl-2 gene in gastric cancer cells SGC7901 and gastric cancer MDR (multidrug resistant) cells SGC7901/VCR, to transduce Fas cDNA and Bcl-2 antisense nucleic acid into SGC7901/VCR cells respectively, and to observe the expression of two genes in transfectants and non-transfectants as well as their drug sensitivity.METHODS Eukaryotic expression vector pBK-Fas cDNA and pDOR-anti Bcl-2 were constructed and transfected into SGC7901/VCR cells by lipofectamine, respectively. Northern blot and Western blot were used to detect the expression of mRNA and protein in SGC7901/VCR and SGC7901 cells and transfectants, and drug sensitivity of transfectants for VCR, CDDP and 5-FU was analyzed with MTT assay.RESULTS After gene transfection, 80 for Fas and 120 for antisense Bcl-2 drug-resistant clones were selected from 2×105 cells, transfection rate being 0.04% and 0.06%. Two clones of SGC7901 Fas/VCR cells and SGC7901 anti Bcl-2/VCR cells were randomly selected for further incubation. Hybridization results showed that the expression level of Fas mRNA and protein in SGC7901/VCR cells was much lower, but that of Bcl-2 mRNA and protein was higher than that in SGC7901 cells. The expression of Fas mRNA and protein in SGC7901 Fas/VCR cells was higher, and of Bcl-2 mRNA and protein was lower in SGC7901 anti Bcl-2/VCR cells than that in non-transfectants. MTT assay showed that transfectants were more sensitive to VCR, CDDP, 5-FU than non-transfectants.CONCLUSION Bcl-2 gene displayed high expression while Fas gene had low expression in drug resistant gastric cancer cells. Expression of Bcl-2 protein was effectively blocked in SGC7901 anti Bcl-2/VCR cells by gene transfection. In contrast, the expression of Fas mRNA and protein in SGC7901 Fas/VCR cells increased. Fas gene and Bcl-2 antisense nucleic acid transfection sensitized drug resistant gastric cancer cells to chemotherapeutic drugs. These results suggest cell apoptosis plays an important role in the mechanism of MDR, and enhancing apoptosis might reverse MDR. 展开更多
关键词 stomach neoplasms FAS gene bcl 2 gene ANTISENSE nucleic acid DRUG resistance multiple gene TRANSDUCTION apoptosis
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Altered Oncogene Activity Contributes to Compensation for Antisense Suppression of Bcl-2 and Tumor Resistance 被引量:1
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作者 Marvin Rubenstein Courtney M. P. Hollowell Patrick Guinan 《Open Journal of Apoptosis》 2015年第3期62-70,共9页
Antisense oligonucleotides (oligos) have targeted growth regulatory proteins in prostate cancer models. To identify compensatory alterations in the expression of non-targeted genes we evaluate mono- and bispecific oli... Antisense oligonucleotides (oligos) have targeted growth regulatory proteins in prostate cancer models. To identify compensatory alterations in the expression of non-targeted genes we evaluate mono- and bispecific oligos targeting and equally suppressing the expression of the apoptosis inhibitory protein bcl-2. Bcl-2 is chosen because oligos directed towards it have entered clinical trials to restore apoptosis in cancer patients. Treated LNCaP cells compensate for the diminished bcl-2 by suppressing caspase-3 (an apoptosis promoter) while enhancing expression of AKT-1 (another apoptosis inhibitor), androgen receptor (AR) and its (p300 and IL-6) coactivators. Additional proteins are enhanced including PD-1, its ligand PD-L1 (immune checkpoint blockade markers) and fas-ligand, which activate apoptosis through the signal transduction, along with suppressor protein p53, polymerase transcription mediator MED-12 and signal transducer STAT-3. These alterations in expression may contribute to a greatly enhanced expression of the proliferation marker KI-67. This suggests that therapeutic approaches to restore apoptosis through suppression of bcl-2 lead to an altered expression in non-targeted genes involving apoptosis, androgen sensitivity, transcriptional activity and immune responsiveness, leads to an increase in proliferation (and a more androgen driven aggressive phenotype). In this study we evaluate the expression of two oncogenes (v-myc and K-ras) and find a large and significant enhancement of v-myc activity, which is produced by oligos targeting bcl-2 at the 5’ position. For K-ras, although significant suppression is produced by the bispecific targeting bcl-2 at the 3’ position, the percent change is relatively small compared with other compensatory alterations we have measured, and much less than in v-myc. Therefore, for the two oncogenes being evaluated, only increased v-myc activity is probably large enough to contribute to increased tumor aggressiveness in compensation for bcl-2 suppression. 展开更多
关键词 ANTISENSE OLIGONUCLEOTIDES Prostate Cancer bcl-2 gene COMPENSATION Therapy
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Effects of Bcl-2 Gene Interference on the Apoptosis,Proliferation and Progesterone Secretion of Goose Follicular Granulosa Cells
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作者 CHEN Xiu-ping CHEN Feng-jian +2 位作者 JIANG Xun-ping LI Zhao-guo DING Jia-tong 《畜牧兽医学报》 CAS CSCD 北大核心 2009年第S1期51-56,共6页
Based on published sequences for chicken Bcl-2,three siRNAs(small interfering RNA)were designed,and expression vectors were constructed and transfected into goose granulosa cells cultured in vitro.Bcl-2 protein,apop... Based on published sequences for chicken Bcl-2,three siRNAs(small interfering RNA)were designed,and expression vectors were constructed and transfected into goose granulosa cells cultured in vitro.Bcl-2 protein,apoptosis and proliferation of granulosa cells,48 h after the transf ection,were analyzed by flow cytometry,and progesterone(P)secreted into the culture medium was measured by radioimmunoassay.In addition,apoptosis and Bcl-2 protein level were assessed in untreated granulosa cells from the four largest preovulatory follicles(F<sub>1</sub><sup>F</sup><sub>4</sub>),the smallest preovulatory follicles(SPF),small yellow follicles(SYF)and atretic follicles.The highest level of Bcl-2 protein was observed in granulosa cells from SPF,and levels in cells from healthy follicles were significantly higher than those of atretic follicles(P【0.05).Bcl-2 protein levels in cells subjected to RNAi were significantly lower than those of controls(P【0.05),while apoptosis indices(AI),proliferation indices(PI)and P secretion in the RNAi treatments were higher than those of controls(P【0.05). 展开更多
关键词 bcl-2 gene RNA INTERFERENCE APOPTOSIS GRANULOSA cell PROGESTERONE
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Bcl-2 GENE REARRANGEMENT DETERMINED BY PCR AS AMEAN TO DETECT MINIMAL RESIDUAL DISEASE INMALIGNANT LYMPHOMAS
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作者 向直富 卢玉英 +3 位作者 赖永榕 陈燕 李慧玉 邹萍 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 1999年第1期49-52,共4页
Objective: To develop a sensitive method to detect minimal residual disease and to elucidate the significance of bcl-2 gene rearrangement in diagnosis and treatment of malignant lymphoma. Methods: Using polymerase cha... Objective: To develop a sensitive method to detect minimal residual disease and to elucidate the significance of bcl-2 gene rearrangement in diagnosis and treatment of malignant lymphoma. Methods: Using polymerase chain reaction (PCR) to detect bcl-2 gene rearrangement and using serial dilution method to define the sensitivity of PCR. Results: In 9 different malignant lymphoma cell lines, Su-DHL-4 and Su-DHL-6 were shown bcl-2(MBR)/JH rearrangement, the sensitivity of PCR was 1:105. In 16 patients with follicular lymphoma, the peripheral blood and bone marrow were PCR positive in 4 cases both at initial diagnosis and after complete remission. Conclusion: Detection of bcl-2 gene rearrangement by PCR provides a sensitive and specific assay of minimal residual disease. It is helpful to improve staging of disease, prognosis and evaluation of the treatment results. 展开更多
关键词 LYMPHOMA Polymerase chain reaction bcl-2 gene gene rearrangement
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Study on the Regulation of Bcl-2 Gene on Rat Spermatogenic Cells Apoptosis in Transcription Level
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作者 董强 杨宇如 +3 位作者 黄明孔 李虹 张卫东 徐震波 《Journal of Reproduction and Contraception》 CAS 2000年第4期187-193,共7页
Objective To detect the change of Bcl 2 gene expression in the apopototic process of spermatogenic cells in rat with vasoligation and vasostomy, and to find out the relationship between the transcription of Bcl 2 a... Objective To detect the change of Bcl 2 gene expression in the apopototic process of spermatogenic cells in rat with vasoligation and vasostomy, and to find out the relationship between the transcription of Bcl 2 and the apoptosis of spermatognic cells Materials & Methods Sixty adult male Sprague Dawley rats in 3 groups were operated with vasoligation and vasostomy. Then hybridization in situ with hypersensitive Bcl 2 RNA probe was used to detect the change of Bcl 2 mRNA. Results The transcription of Bcl 2 gene in spermatogenic cells was obviously inhibited in the vasoligation group compared with that in the control group (P<0.05), and the transcription in the vasostomy group showed no difference from that of the control group. Conclusion Bcl 2 gene has an anti apoptotic effect in rats with vasostomy, and there was a transcriptional regulation of Bcl 2 gene in rat spermatogenic cell during the period of pre vasoligation to post vasoligation and to post vasosotomy. 展开更多
关键词 RAT spermatogenic cell bcl-2 gene TRANSCRIPTION
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Silencing of Bcl-2 gene expression by siRNA transfection in- hibits the protective effect of fluvastatin against cell apoptosis in human aortic endothelial cells
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作者 Wenwen Zhong Yang Liu Jian Li Hui Tian 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2008年第1期33-38,共6页
Objective To study the protective effect of fluvastatin,one of the HMG-CoA reductase inhibitors (statins),against oxygen radical-induced oxidative damages in human aortic endothelial cell,and the role of Bcl-2 in this... Objective To study the protective effect of fluvastatin,one of the HMG-CoA reductase inhibitors (statins),against oxygen radical-induced oxidative damages in human aortic endothelial cell,and the role of Bcl-2 in this protection.Methods Human aortic endothelial cells with or without Bcl-2 siRNA transfection were subjected to 1-100 nM of fluvastatin and 100 la hydrogen peroxide for 24 hours.Bcl-2 mRNA and protein expression were measured by Taqman quantitative PCR and Western blotting.Cell apoptosis was measured by normal and fluorescent microscopy and Cell Death Detection ELISA.Results In the Bcl-2-expressed cells,fluvastatin significantly reversed hydrogen peroxide-induced microscopic apoptosis and apoptotic DNA fragmentation,which were accompanied by a markedly upregulation of Bcl-2 expression by fluvastatin.However,the endothelial protection by fluvastatin was completely lost in Bcl-2 siRNA transfected cells.Conclusion Fluvastatin protects human endothelial cells against oxygen radical-induced cell apoptosis in vitro,and this protection seemed to be mediated in a Bcl-2 dependent pathway.(J Geriatr Cardil 12008;5:33-38) 展开更多
关键词 fluvastatin bcl-2 gene silencing apoptosis
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DETECTION OF BCL-2 GENE MAJOR BREAKPOINT REGION REARRANGEMENT IN HUMAN B-CELL LYMPHOMAS
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作者 强雅维 施秉银 《Academic Journal of Xi'an Jiaotong University》 2000年第1期5-11,共7页
Objective To investigate the frequency of t(14; 18) in different subtypes of B-cell lymphomas and the ability or the polymerase chain reaction(PCR) to detect this rearrangement in frozen samples. Methods 1o7 cases of ... Objective To investigate the frequency of t(14; 18) in different subtypes of B-cell lymphomas and the ability or the polymerase chain reaction(PCR) to detect this rearrangement in frozen samples. Methods 1o7 cases of B-cell lymphomas were studied uslng DNA extracted from rresh-frozen tissues. The DNA samples were amplified by PCR for bcl-2 MBR/JH. The products of bcl-2/JH rearrangement were hybridized with an internal olignucleotide probe or bcl-2 MBR. Results The rearranged bcl-2MBR/JH gene was detected in 13 of the 25(52. o% ) follicular center lymphomas, according to REAL classification: 8 of 11 (72. 7%) grade 1, 2 of 5(40. 0%) grade I, and 3 of 90 (33. 3%) grade, 17 of 82(2o. 8%) cases or difruse large B-cell lymphomas were found to have detectable bel-2 MBR/J. rearrangement- Conclusion The rrequency or bcl-2 MBR/JH rearrangement in diffuse large B-cell lymphomas is significantly lower than those in follicular center lympkomas(X2= 9. 28, P <o. oo5), suggesting that bcl2/JH rearrangements occur mainly in follicular center lymphomas. in addition, the result of reconstruction experiments suggest that amplification or bcl-2 MBR/JH rearrangements by PCR is both sensitive and specific for detection of t (14; 18 ) translocation. 展开更多
关键词 bcl-2 gene major breakpoint region (MBR) polymerase chain reaction(PCR) B-cell lymphomas
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Detection of apoptotic cells and immunohistochemical study of bcl-2 and p53 gene protein in primary gastric mucosa-associated lymphoid tissue (MALT) lymphoma
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作者 肖华亮 王东 +1 位作者 李增鹏 牟江洪 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2000年第3期71-75,共5页
To identify the apoptotic cells in gastric MALT lymphoma and its relationship between bcl-2 and p53 gene expression. Methods: TdT-mediated dUTP biotin Nick End labeling (TUNEL) and immuno-histochemistry ABC method we... To identify the apoptotic cells in gastric MALT lymphoma and its relationship between bcl-2 and p53 gene expression. Methods: TdT-mediated dUTP biotin Nick End labeling (TUNEL) and immuno-histochemistry ABC method were used to display apoptotic cells and the gene protein expression of bcl-2 and p53 independently. Results: Apoptotic indices (AI) in high-grade MALT lymphomas were significantly higher than in mixed-grade group and low-grade group (P<0.05). Bcl-2 was expressed in 83% of low-grade tumors, 61.6% of the median-grade tumors and 43.7% of high-grade tumors. An inverse correlation was observed between the expression of bcl-2 and apoptotic indices. Only 27 cases were p53 positive. The frequency of p53 positivity was significantly increased as the histologic grade advanced (P<0.05). There was also an inverse correlation between the expression of bcl-2 and p53. Conclusion: Apoptosis may be important in tumors development and transmission. p53 and bcl-2 were important regulatory genes of apoptosis and may be associated with transformation from low- grade to high-grade lymphomas. 展开更多
关键词 apoptosis IMMUNOHISTOCHEMISTRY geneS p53 bcl-2 mucosa-associated lymphoid tissue lymphoma
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电针对大鼠脑缺血再灌注损伤后细胞凋亡相关基因Bcl-2、Bax表达的影响 被引量:23
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作者 范茜茜 董勤 +3 位作者 沈梅红 李茜 赵小文 吴锦萍 《中国老年学杂志》 CAS 北大核心 2017年第5期1041-1043,共3页
目的探讨电针对脑缺血再灌注大鼠皮质细胞凋亡相关蛋白Bcl-2、Bax及其mRNA表达的影响。方法雄性清洁级SD大鼠72只,采用随机数字表法分为假手术组、模型组和电针组各24只。用改良Longa线栓法制作大鼠右侧大脑中动脉脑缺血模型,缺血2 h,... 目的探讨电针对脑缺血再灌注大鼠皮质细胞凋亡相关蛋白Bcl-2、Bax及其mRNA表达的影响。方法雄性清洁级SD大鼠72只,采用随机数字表法分为假手术组、模型组和电针组各24只。用改良Longa线栓法制作大鼠右侧大脑中动脉脑缺血模型,缺血2 h,于再灌注开始后电针组针刺"百会"和"大椎"穴。各组于缺血再灌注24 h后行神经行为学评分和脑含水量测定,免疫组化染色法检测缺损侧皮层组织Bcl-2、Bax的蛋白表达,qRT-PCR检测Bcl-2 mRNA、Bax mRNA表达的变化。结果模型组、电针组神经行为学评分均低于假手术组(P<0.01),与模型组比较,电针组的神经行为学评分升高(P<0.05)。与假手术组比较,模型组脑含水量明显增高(P<0.01),电针组的差异无统计学意义(P>0.05),较之模型组,电针组的脑含水量显蓍降低(P<0.01)。与假手术组比较,模型组、电针组Bcl-2蛋白及mRNA的表达均显著增多(P<0.05或P<0.01),电针组又高于模型组(P<0.05);较之假手术组,模型组Bax蛋白及mRNA表达显著上升(P<0.01),电针组无明显差异(P>0.05),电针组较模型组显著降低(P<0.01);Bcl-2/Bax及Bcl-2 mRNA/Baxm RNA的比值,模型组降低而电针组升高(P<0.01)。结论电针可以通过提升Bcl-2/Bax的比值使抗凋亡基因占据优势,从而抑制缺血再灌注区的细胞凋亡,减轻脑水肿,促进神经功能恢复。 展开更多
关键词 电针 脑缺血再灌注 细胞凋亡 bcl-2 BAX
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六味地黄丸对OLETF大鼠胰腺凋亡相关基因bcl-2和Bax表达的影响 被引量:22
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作者 薛耀明 罗仁 +3 位作者 朱波 张燕 潘永华 李晨钟 《中西医结合学报》 CAS 2005年第6期455-458,共4页
目的:探讨六味地黄丸对自发性2型糖尿病大鼠胰腺组织凋亡相关基因bcl-2和Bax表达的影响。方法:OLETF大鼠(自发性2型糖尿病)40只,随机分为六味地黄丸治疗组和模型组,每组20只;另同系LETO大鼠(非糖尿病)10只作为正常对照组。六味地黄丸治... 目的:探讨六味地黄丸对自发性2型糖尿病大鼠胰腺组织凋亡相关基因bcl-2和Bax表达的影响。方法:OLETF大鼠(自发性2型糖尿病)40只,随机分为六味地黄丸治疗组和模型组,每组20只;另同系LETO大鼠(非糖尿病)10只作为正常对照组。六味地黄丸治疗组于大鼠8周龄起,用六味地黄丸按2.4 g.kg-1.d-1灌胃,余组用等量蒸馏水灌胃。每周记录大鼠体质量;采用口服葡萄糖耐量试验监测血糖;定期处死大鼠,分离胰腺并称重;采用逆转录-聚合酶链反应检测bcl-2和Bax在胰腺组织中的表达。结果:大鼠40周龄时,六味地黄丸治疗组bcl-2 mRNA的表达水平为(1.25±0.07),较模型组(1.01±0.16)明显增高(P<0.01);Bax mRNA的表达水平为(0.57±0.11),较模型组(1.18±0.28)有明显降低(P<0.01)。六味地黄丸治疗组的胰腺/体重比,较模型组增高,但差异无统计学意义。六味地黄丸治疗组的糖负荷能力明显高于模型组(P<0.05或P<0.01)。结论:六味地黄丸在转录水平可上调bcl-2 mRNA的表达,下调Bax mRNA的表达,可能具有抗细胞凋亡的作用。 展开更多
关键词 糖尿病 2 凋亡 基因 bcl-2 基因 Bax 六味地黄汤 大鼠 OLETF
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川芎嗪对缺血/再灌注损伤大鼠肾脏细胞凋亡及Bcl-2和Bax表达的影响 被引量:20
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作者 王汉民 吴雄飞 +2 位作者 谭华 陈光磊 李锋 《第四军医大学学报》 北大核心 2006年第20期1884-1887,共4页
目的:观察川芎嗪对急性缺血/再灌注(I/R)损伤大鼠肾脏细胞凋亡及凋亡相关蛋白的影响,探讨川芎嗪对急性肾I/R损伤保护作用的可能机制.方法:将40只Wistar大鼠夹闭双侧肾动脉45min再灌注24h,制备成急性肾I/R损伤动物模型,随机分为假手术对... 目的:观察川芎嗪对急性缺血/再灌注(I/R)损伤大鼠肾脏细胞凋亡及凋亡相关蛋白的影响,探讨川芎嗪对急性肾I/R损伤保护作用的可能机制.方法:将40只Wistar大鼠夹闭双侧肾动脉45min再灌注24h,制备成急性肾I/R损伤动物模型,随机分为假手术对照组、I/R组、川芎嗪治疗组和川芎嗪预防组,采用原位末端标记法检测细胞凋亡指数,免疫组化法测定Bcl-2,Bax表达,电镜观察肾组织细胞超微结构.结果:I/R组较假手术对照组肾小管细胞凋亡指数明显增多(28.8±4.6vs1.9±0.5,P<0.01),Bax表达显著增强(162.6±17.1vs182.7±12.8,P<0.01),Bcl-2/Bax显著降低(1.1±0.1vs1.0±0.1,P<0.01);川芎嗪预防组较I/R组肾小管凋亡细胞数明显减少(13.6±2.9vs28.8±4.6,P<0.05),Bax表达明显减弱(179.1±12.7vs162.6±17.1,P<0.05),Bcl-2表达明显增强(166.6±15.1vs178.7±13.0,P<0.05),Bcl-2/Bax显著增高(0.9±0.1vs1.1±0.1,P<0.05).结论:川芎嗪对急性肾I/R损伤具有保护作用,其作用机制可能是通过调节凋亡相关基因Bcl-2和Bax介导的I/R损伤肾脏细胞凋亡而实现. 展开更多
关键词 川芎嗪 再灌注损伤 细胞凋亡 基因 bcl-2 基因 Bax
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迷迭香精油诱导肝癌HepG2细胞凋亡后bcl-2和bax基因表达变化的研究 被引量:15
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作者 魏凤香 刘君星 +2 位作者 王琳 李红枝 罗佳滨 《中药材》 CAS CSCD 北大核心 2008年第6期877-879,共3页
目的:探讨凋亡相关基因bcl-2和bax在迷迭香精油诱导肝癌HepG2细胞凋亡后表达的变化。方法:水蒸气蒸馏法提取迷迭备精油,GC-MS鉴定其成分。采用免疫组化法检测bcl-2蛋白和bax蛋白表达。结果:不同浓度的迷迭香精油处理细胞12、24、48 h后b... 目的:探讨凋亡相关基因bcl-2和bax在迷迭香精油诱导肝癌HepG2细胞凋亡后表达的变化。方法:水蒸气蒸馏法提取迷迭备精油,GC-MS鉴定其成分。采用免疫组化法检测bcl-2蛋白和bax蛋白表达。结果:不同浓度的迷迭香精油处理细胞12、24、48 h后bcl-2蛋白的表达降低,bax蛋白的表达升高,与对照组比较均有显著性差异,并且均现时间和剂量依赖性。结论:迷迭香精油诱导肝癌HepG2细胞凋亡与凋亡调控基因bax表达增强,bcl-2表达减少有关。 展开更多
关键词 迷迭香精油 肝癌 HEPG2细胞 BAX基因 bcl-2基因
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NF-κB、bcl-2、bax在胃不典型增生、胃癌中的表达及其意义 被引量:12
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作者 崔涛 刘莹 +2 位作者 朱祖安 费素娟 李凤朝 《山东大学学报(医学版)》 CAS 北大核心 2006年第7期689-693,共5页
目的:探讨核因子κB(nuclear factor kappa B,NFκ-B)、bcl-2及bax在胃不典型增生及胃癌中的表达及在胃癌发生中的作用。方法:采用免疫组化Power Vision两步法检测84例胃癌和54例胃不典型增生组织中NFκ-B、bcl-2及bax的表达,TNNEL法染... 目的:探讨核因子κB(nuclear factor kappa B,NFκ-B)、bcl-2及bax在胃不典型增生及胃癌中的表达及在胃癌发生中的作用。方法:采用免疫组化Power Vision两步法检测84例胃癌和54例胃不典型增生组织中NFκ-B、bcl-2及bax的表达,TNNEL法染色检测凋亡指标的改变。结果:NFκ-B、bcl-2、bax在84例胃癌组织中的阳性表达率分别为59.52%、52.38%、16.67%,在33例胃轻度不典型增生组织中阳性表达率分别为24.24%、21.21%、33.33%,三者在胃癌与轻度不典型增生组之间差异有统计学意义(P<0.05)。NFκ-B、bcl-2表达与肿瘤的大小相关(P<0.05),NFκ-B与bcl-2之间呈正相关(P<0.05)。在轻度不典型增生、重度不典型增生与胃癌组织中AI分别为(1.29±0.50)%、(0.96±0.36)%、(0.70±0.43)%,轻度不典型增生与重度不典型增生、胃癌之间差异均有统计学意义(P<0.05)。结论:在胃癌中NFκ-B可通过上调bcl-2的表达、改变bcl-2与bax的比值而抑制肿瘤细胞凋亡,进而影响肿瘤的生长、浸润、转移。 展开更多
关键词 胃肿瘤 胃不典型增生 NF-ΚB 基因 bcl-2 BAX
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米非司酮对人早孕期蜕膜细胞凋亡及其调控基因bcl-2/bax的影响 被引量:15
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作者 丁峰 傅国强 +2 位作者 邢福祺 陈士岭 刘以训 《现代妇产科进展》 CSCD 2002年第1期36-38,共3页
目的 :探讨米非司酮对早孕期蜕膜组织细胞bcl 2 /bax的影响及与妊娠终止的关系。方法 :用琼脂糖凝胶电泳、TUNEL法检测凋亡的发生及凋亡细胞的定位 ,用免疫组化法检测bcl 2 /bax蛋白的表达和相互关系。结果 :(1)正常早孕 4 0 + 天蜕膜... 目的 :探讨米非司酮对早孕期蜕膜组织细胞bcl 2 /bax的影响及与妊娠终止的关系。方法 :用琼脂糖凝胶电泳、TUNEL法检测凋亡的发生及凋亡细胞的定位 ,用免疫组化法检测bcl 2 /bax蛋白的表达和相互关系。结果 :(1)正常早孕 4 0 + 天蜕膜组织细胞大量凋亡 ,bcl 2蛋白表达量较低 ,bax蛋白有较强表达 ;(2 )正常早孕 5 0 + 天 ,凋亡细胞明显减少 ,bcl 2的表达显著增强 ,bax蛋白表达减弱 ;(3)早孕 5 0 + 天应用米非司酮 ,蜕膜组织出现大量凋亡细胞及明显凋亡带 ,bcl 2蛋白表达明显降低 ,bax蛋白表达较前明显增强。结论 :早孕期米非司酮流产的机制可能与蜕膜组织细胞凋亡异常相关 ,bcl 2 /bax途径可能是其诱导早孕期蜕膜细胞凋亡的重要因素。 展开更多
关键词 蜕膜 细胞凋亡 米非司酮 bcl-2 基因 bax 早孕
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