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1.
外源性p16基因对人前列腺癌的作用   总被引:3,自引:3,他引:2  
目的:研究外源性p16基因对人前列腺癌PC-3M细胞系生长及致瘤性的抑制作用,探索前列腺癌基因治疗的新途径.方法:利用携带约800 bp的外源性p16 cDNA的真核表达质粒,通过脂质体介导将其导入人前列腺癌PC-3M细胞系中,用G418筛选阳性克隆,经流式细胞仪及细胞生长曲线测定等方法研究p16基因对人前列腺癌细胞周期生长特性的影响,并观察导入外源性p16基因的人前列腺癌细胞PC-3M对裸鼠致瘤能力的影响.结果:野生型p16基因转染到有p16基因缺失的人前列腺癌细胞PC-3M上,细胞周期明显变化,细胞从G1期到S期发生抑制,细胞增殖活性降低.结论:转染外源性p16基因可阻止人前列腺癌细胞由G1期进入S期,并使肿瘤恶性增殖受到抑制.  相似文献
2.
目的研究PTEN/MMAC1/TEP1、TGF-β1在前列腺癌及前列腺增生中的表达探讨前列腺癌组织中PTEN/MMAC1/TEP1、TGF-β的表达与临床病理特征和生物学行为的关系及其意义。方法前列腺癌标本26例,前列腺增生标本18例,均为存档石蜡切片。应用原位杂交技术研究PTEN/MMAC1/TEP1表达水平,应用免疫组化研究PTEN/MMAC1/TEP1、TGF-β1表达。结果用原位杂交方法:前列腺癌组织中PTEN/MMAC1/TEP1表达42.31%,前列腺增生组织中的表达94.44%(P<0.01)。而免疫组化方法前列腺癌组织表达为34.62%,前列腺增生为94.44%(P<0.01)。组织学分级为Ⅰ、Ⅱ级的表达为72.72%高于Ⅲ级的20.00%(P<0.05)。临床分期A-C期的表达为66.67%,D期为21.43%(P<0.05)。表达为阳性的血清PSA浓度均值为(29.36±1.74)高于阴性的(15.92±2.06)(P<0.01);TGF-β1表达在前列腺癌组织为50.39%,在前列腺增生组织为11.11%(P<0.01)。组织学分级为Ⅰ、Ⅱ级的表达为27.27%低于Ⅲ级的73.33%(P...  相似文献
3.
目的:观察内皮素A受体拮抗剂BQ123对人前列腺癌(PCA)PC3细胞株增殖与凋亡的影响,探讨内皮素A受体拮抗剂对PCA细胞的体外抗肿瘤效应。方法:采用四甲基偶氮唑蓝(MTT)比色法、划痕损伤实验、细胞迁移实验观察BQ123对人PCA PC3细胞株增殖的抑制效应,利用Annexin V-FITC/PI染色和流式细胞术检测BQ123诱导肿瘤细胞凋亡的作用及其与细胞周期的关系。结果:BQ123对PCA PC3细胞株有抑制作用,并表现出良好的时效关系。细胞凋亡和细胞周期实验表明,BQ123可诱导PC3细胞株的凋亡,其诱导细胞凋亡的作用与细胞周期无关。结论:BQ123对PCA PC3细胞株增殖的抑制效应具有时间依赖性,并可诱导细胞凋亡,可为PCA的治疗提供一种新的思路。  相似文献
4.
血清c-PSA及 C/T在提高前列腺癌诊断特异性中的探讨   总被引:3,自引:2,他引:1  
目的 研究复合前列腺特异性抗原(c-PSA)及相关指标在鉴别诊断前列腺癌和良性前列腺增生中的应用价值,提高前列腺癌诊断特异性.方法 分析了70例男性,经B超、病理诊断证实18例为前列腺癌(Pca),27例为良性前列腺增生(BPH),25例为正常对照组.Bayer ACS:180化学发光法测得c-PSA、t-PSA,计算c-PSA/t-PSA值(C/T).结果 t检验比较Pca和BPH组的c-PSA、t-PSA、C/T和Age值,前两者有显著性差异(P《0.01),后两者无显著性差异(P》0.05).分别计算Pca和BPH组的c-PSA、t-PSA的直线相关系数r,Pca组r=0.981 2, Pca组回归方程为c-PSA=0.935 4×t-PSA-2.91, 高度相关.BPH组r=0.410 9.在100%敏感性时,c-PSA 3.75 μg/L、t-PSA 4.0 μg/L、C/T=0.65、c-PSA 7.5 μg/L加(C/T=0.65)的特异性分别为42.3%、38.5%、36.5%、75.0%.结论 前列腺癌比BPH的c-PSA 和t-PSA相关度高.在保持灵敏度100%时,若结合c-PSA 7.5 μg/L加(C/T=0.65)指标,将明显提高特异性到75.0%.  相似文献
5.
目的 探讨前列腺癌细胞中Aurora A表达与细胞对紫杉醇敏感性的相关性,明确Aurora A表达是否影响紫杉醇对前列腺癌的治疗效果.方法 以激素非依赖性前列腺癌细胞Du145为研究对象,通过转染Aurora A全长基因得到稳定高表达Aurora A 的细胞系Du145-Aurora A,细胞用不同浓度紫杉醇处理,用MTT细胞增殖实验检测细胞生长抑制率,用流式细胞仪分析细胞凋亡情况,比较Aurora A表达上调后细胞生长抑制率和细胞凋亡率的变化.同时,用核酶技术使细胞Aurora A表达下调,检测Aurora A表达下调后细胞生长抑制率和细胞凋亡率的变化.结果 Aurora A表达上调使紫杉醇对细胞的生长抑制率和细胞凋亡率均降低(P<0.01),而Aurora A表达下调使紫杉醇对细胞的生长抑制率和细胞凋亡率均增高(P<0.01).结论 人前列腺癌细胞中Aurora A表达与细胞对紫杉醇敏感性具有相关性,抑制Aurora A可望提高紫杉醇对前列腺癌的治疗效果.  相似文献
6.
Background  Overexpression of Bcl-2 protein in cancer cells can inhibit programmed cell death and engender chemoresistance. Bcl-2 antisense oligonucleotide (G3139) has shown its antitumor effects enhanced in preclinical models when combined with taxol-based chemotherapy. This study aimed to investigate the efficacy of G3139 combined with epirubicin in the androgen-independent prostate cancer.
Methods  PC3 prostate cancer cell line was cultured and treated with epirubicin and Bcl-2 antisense oligonucleotide alone or in combination. The effects of therapeutic agents on cells were determined by the MTT assay. Expression of Bcl-2 mRNA and protein was documented by RT-PCR and Western blotting. Apoptosis induction was confirmed by flow cytometric analysis.
Results  Bcl-2 antisense oligonucleotide alone produced no cytotoxic effects and the combination of Bcl-2 antisense oligonucleotide with epirubicin sensitized PC-3 cells to the killing effects of chemotherapy. A marked down-regulation of Bcl-2 mRNA and protein was observed after antisense and epirubicin cotreatment. A statistically significantly higher fraction of apoptotic cells was detected by flow-cytometric analysis after epirubicin treatment with prior antisense Bcl-2 transfenction, as compared with mono antisense Bcl-2 or epirubicin treatment.
Conclusion  These data suggested that inhibition of Bcl-2 expression combined with epirubicin may be an attractive therapeutic strategy in hormone-refractory prostate cancer.
  相似文献
7.
青蒿琥酯和TRAIL对前列腺癌细胞凋亡诱导作用的实验研究   总被引:2,自引:2,他引:0  
目的探讨青蒿琥酯和肿瘤坏死因子相关的凋亡诱导配体(TRAIL)对前列腺癌细胞(PC-3、LNCaP)凋亡的诱导作用。方法培养前列腺癌PC-3、LNCaP细胞,分别加入不同浓度的青蒿琥酯和TRAIL,随机分为7个组:对照组、青蒿琥酯Ⅰ组(低剂量组)、青蒿琥酯Ⅱ组(高剂量组)、TRAILⅠ组(低剂量组)、TRAILⅡ组(高剂量组)、TRAIL(1 ng/mL)加青蒿琥酯(1mmol/L)Ⅰ组及TRAIL(1 ng/mL)加青蒿琥酯(5 mmol/L)Ⅱ组。流式细胞仪检测青蒿琥酯和TRAIL诱导前列腺癌细胞凋亡的凋亡率。结果青蒿琥酯和TRAIL均可增加前列腺癌细胞凋亡的凋亡率,二者联合使用诱导的前列腺癌细胞的凋亡率明显高于两种药物单独使用。结论青蒿琥酯与TRAIL联合使用对前列腺癌存在诱导凋亡的协同作用。青蒿琥酯能诱导提高前列腺癌细胞对TRAIL的敏感性,加强TRAIL的诱导肿瘤细胞凋亡的作用。  相似文献
8.
EGCG对前列腺癌PC-3细胞生长增殖的影响   总被引:2,自引:0,他引:2  
目的探讨表没食子儿茶素没食子酯酸(EGCG)对前列腺癌PC-3细胞细胞增殖和细胞周期的影响。方法MTT法检测EGCG对前列腺癌PC-3细胞生长和增殖的抑制作用;流式细胞仪DNA含量分析法探讨EGCG对前列腺癌PC-3细胞周期的影响。结果与对照组相比,3组不同浓度EGCG均能明显抑制前列腺癌PC-3细胞生长,G0~G1期细胞增加。结论EGCG可将前列腺癌PC-3细胞阻滞于G0~G1期,抑制细胞增殖。  相似文献
9.
Background Aging of population in Macau has become a serious problem and we are diagnosing more and more patients with prostate cancer. To investigate the effect of ethnicity and environment on incidence of prostate carcinoma, we compared the difference of biopsy and postoperative pathology of prostate between indigenous Chinese (Chinese) and Chinese of Portuguese descent (Portuguese) with elevated serologic prostate specific antigen (PSA) and incidence of prostate carcinoma in Macau.
Methods Between 1999 and 2006, prostate biopsy was performed in a random sample of 462 patients with elevated serologic PSA who, on followup, were diagnosed in this hospital with benign prostate hyperplasia. Of these, 416 were indigenous Chinese, 46 Portuguese. Based on demographic statistics by Macau government for 2005, we compared differences in incidences of prostate carcinoma, positive rate of random prostate biopsy in patients with elevated serologic PSA, factors related to serological PSA and pathological grade and stage between both ethnic groups.
Results Prostate carcinoma was diagnosed on biopsy in 178 cases. Positive biopsies of prostate carcinoma were present in 160 Chinese with positive rate of 38.5% and in 18 Portuguese with 39.1%. For patients diagnosed with prostate carcinoma, there was no significant difference in age, incidence, grade of cancerous cells, stage of the disease, incidence of inflammation of prostatic tissues or prostatic intraepithelial neoplasia (PIN) related to elevated PSA between the groups (All P〉0.05).
Conclusions There was no significant difference in incidence or characteristics of prostate carcinoma between people of Portuguese and Chinese descent in Macau based on our limited data. Long term residence in the same environment may be associated with the incidence and progression of prostate carcinoma in Portuguese living in Macau, but further rigorous epidemiological investigation and analysis of risk factors about prostate carcinoma are needed to corroborate this conc  相似文献
10.
Background Incidence of prostate cancer has been increasing in recent decades. In the year 2005, prostate cancer became the second most common cancer in males in Macau. The purpose of this report was to review and summarize the clinical features and prognosis of the 54 patients undergoing radical prostatectomy in Macau Special Administrative Region (SAR), China.
Methods From November 2000 to November 2006, retropubic radical prostatectomy were performed in 54 cases for the treatment of prostate cancer. The mean age of patients was 69.8 years (range from 54 to 79). The preoperative prostate specific antigen (PSA) level, postoperative pathologic stage and Gleason's score, operation duration, intraoperative bleeding and intraoperative and postoperative complications were reported. The follow-up duration was 3 months to 6.25 years with a mean of 2.1 years. Postoperative parameters including PSA alteration, biochemical recurrence, local recurrence, distant metastasis and mortality were observed.
Results Most of the patients in our study were diagnosed as localized prostate cancer. The patients' preoperative serum PSA was 0-4.0 ng/ml (16.7%), 4.0-10.0 ng/ml (51.8%), 10.1-20.0 ng/ml (24.1%) and above 20.0 ng/ml (7.4%). The TNM stage T1a + T1b comprised 7.6% of patients, stage T2a + T2b comprised 20.3%, stage T2c 38.9%, stage T3a 20.3% and over T3a only 12.9%. There were 9.5% cases with Gleason scores of 2-4, 41.5% with scores of 5-6, 30.2% with scores of 7 and 18.8% with scores of 8-10. The average operative duration was 216 minutes and the average intraoperative bleeding was 760 ml. Intraoperative complications included one massive hemorrhage (1.9%), one rectal injury (1.9%) and one obturator nerve injury (1.9%). Early postoperative complications consisted of urinary incontinence (14 cases, 25.9%), bladder neck stricture (5 cases, 9.3%), acute urinary retention (4 cases, 7.4%), pelvic effusion (2 cases, 3.8%), lymphocele (1 case, 1.9%) and vesicorect  相似文献
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