共查询到17条相似文献,搜索用时 105 毫秒
1.
用尿沉淀细胞DNA甲基化状态的分析检测膀胱癌 总被引:3,自引:0,他引:3
目的:确定尿沉淀细胞DNA中的13个肿瘤相关基因启动子的甲基化谱式分析在膀胱癌诊断中的价值。方法:用定性甲基化特异性(methylation specific polymerase chain reaction,MSP)的方法,对92例临床确诊的膀胱癌患者、23例非肿瘤性尿路疾病患者、6例脑外科患者、7例健康志愿者检测了尿沉淀细胞DNA中肿瘤相关基因启动子的甲基化状态。结果:在临床确诊的92例膀胱癌患者中被检测的13个基因的高甲基化状态出现频率显著高于23例非肿瘤性尿路疾病患者,差异有统计学意义(P〈0.05)。而6例脑外科患者和7例正常健康人的尿沉淀细胞DNA中,上述基因均为去甲基化状态。若以任一个基因高甲基化为膀胱癌的指征,88.0%(81/92例)的膀胱癌可被检出。结论:MSP法分析尿沉淀细胞DNA中肿瘤相关基因启动子的甲基化状态可有效地检出膀胱癌。 相似文献
2.
抗凋亡基因bcl-2启动子CpG岛的高甲基化状态见于28.3%(13/46例)的膀胱癌患者尿沉淀细胞DNA 总被引:1,自引:1,他引:1
目的:检测上海地区膀胱癌患者尿沉淀细胞中3个肿瘤相关基因启动子CpG岛的甲基化谱式异常频率,继而评估其应用前景。方法:采用甲基化特异性PCR方法分析尿沉淀细胞DNA中DAPK1、bcl2和hTERT3个基因的启动子CpG岛甲基化状态,并通过RTPCR方法评估DAPK1基因在膀胱癌细胞系中的表达状态。结果:对膀胱癌细胞系中DAPK1基因的启动子CpG岛甲基化状态及其表达(mRNA水平上)所做的分析,确立了高甲基化状态与表达静息化之间的相关性。对46例临床确诊的膀胱癌患者和84例非膀胱癌对照(包括前46例术后的36例)的尿沉淀细胞中DNA甲基化的分析发现,仅bcl2基因的高甲基化见之于28.3%(13/46例)的膀胱癌患者,而84例的对照中均为去甲基化状态。结论:在美国膀胱癌患者尿沉淀细胞中频发DNA高甲基化的靶点在上海地区膀胱癌患者人群中频率很低,因此寻找在后者中频发DNA高甲基化的新靶点实属必要。 相似文献
3.
尿脱落细胞微卫星DNA改变在膀胱癌早期诊断中的应用 总被引:5,自引:0,他引:5
目的 利用检测尿脱落细胞微卫星DNA序列(microsatellite,MS)改变,建立早期诊断膀胱癌的方法。方法 选择10对微卫星MS引物,利用聚合酶链反应(PCR)方法,以自身外周血和膀胱癌组织为对照,检测28例膀胱癌患者尿脱落细胞中MS的失杂合(loss of heterozygosity,LOH)和不稳定性(microsatellite instability,MIN)。结果 28例膀胱癌患者中,24例(85.7%)尿脱落细胞至少在1个MS位点存在LOH或MIN改变,3例(10.7%)脱落细胞学检查阳性患者尿脱落细胞均检出LOH或MIN。同一患者尿脱落细胞与癌组织LOH改变一致率为94.1%。15例正常人悄脱落细胞中未见MS的改变。结论 利用检测尿脱落细胞MS改变诊断膀胱癌,比常规的细胞学检查更敏感、更 相似文献
4.
DNA甲基化的测定及其在肿瘤诊断中的意义 总被引:1,自引:0,他引:1
DNA甲基化的测定及其在肿瘤诊断中的意义房静远,江绍基上海第二医科大学仁济医院上海市消化疾病研究所(上海200001)真核细胞在转录水平的基因调控作用之一,是DNA特殊部位的甲基修饰作用。DNA甲基化(DNAmethylation)状态的维持与基因转... 相似文献
5.
目的:比较膀胱癌患者尿液脱落细胞中XIAP表达的RT-PCR检测法和常规尿脱落细胞病理学检测在膀胱癌诊断中的临床价值。方法:采用逆转录聚合酶链反应技术(RT-PCR)检测51例膀胱尿路上皮癌患者尿液脱落细胞中XIAP-mRNA的表达,同时行常规尿脱落细胞病理学检测,20例非肿瘤人员作为对照组。结果:实验组51例尿脱落细胞XIAP-mRNA RT-PCR检测阳性27例(53%),尿脱落细胞学病理学检测阳性12例(24%),对照组20例尿脱落细胞XIAP-mRNA检测阳性1例(5.0%),对照组尿脱落细胞病理学检测阳性0例(0%)。实验组RT-PCR检测膀胱尿路上皮癌患者尿脱落细胞中XIAP表达的敏感性高于尿脱落细胞病理学检测,差异有极显著统计学意义(P〈0.01),实验组RT-PCR检测膀胱尿路上皮癌患者尿中XIAP表达的敏感性显著高于非肿瘤对照组,差异有极显著统计学意义(P〈0.01)。结论:膀胱尿路上皮癌患者尿脱落细胞中XIAP表达的RT-PCR检测法较常规尿脱落细胞病理学检测更敏感,临床上作为膀胱癌的筛选方法,有一定的临床价值。 相似文献
6.
目的:比较膀胱癌患者尿液脱落细胞中XIAP表达的RT-PCR检测法和常规尿脱落细胞病理学检测在膀胱癌诊断中的临床价值。方法:采用逆转录聚合酶链反应技术(RT-PCR)检测51例膀胱尿路上皮癌患者尿液脱落细胞中XIAP-mRNA的表达,同时行常规尿脱落细胞病理学检测,20例非肿瘤人员作为对照组。结果:实验组51例尿脱落细胞XIAP-mRNA RT-PCR检测阳性27例(53%),尿脱落细胞学病理学检测阳性12例(24%),对照组20例尿脱落细胞XIAP-mRNA检测阳性1例(5.0%),对照组尿脱落细胞病理学检测阳性0例(0%)。实验组RT-PCR检测膀胱尿路上皮癌患者尿脱落细胞中XIAP表达的敏感性高于尿脱落细胞病理学检测,差异有极显著统计学意义(P<0.01),实验组RT-PCR检测膀胱尿路上皮癌患者尿中XIAP表达的敏感性显著高于非肿瘤对照组,差异有极显著统计学意义(P<0.01)。结论:膀胱尿路上皮癌患者尿脱落细胞中XIAP表达的RT-PCR检测法较常规尿脱落细胞病理学检测更敏感,临床上作为膀胱癌的筛选方法,有一定的临床价值。 相似文献
7.
细胞角蛋白20对膀胱癌早期诊断的前瞻性研究 总被引:2,自引:0,他引:2
目的:评估细胞角蛋白20(CK20)标志物作为膀胱癌早期诊断及临床监测的价值。方法:对62例患者的尿液进行尿脱落细胞学及CK20标志物免疫荧光检测的前瞻性研究。分析参数包括肿瘤数目、大小及WHO分级,术前或活检前尿脱落细胞学和CK20标志物。结果:病理活检证实15例移行细胞癌中,CK20为13例阳性,2例阴性;47例非膀胱癌中,CK20标志物2例假阳性。与尿脱落细胞学比较,CK20标志物对膀胱移行细胞癌诊断的特异性和阳性预报值更高,分别为96.0%比82.5%(U=2.18,P<0.05),86.7%比52.4%(U=2.16,P<0.05);但两者在敏感性和阴性预报值间无显著性差异(U值分别为:0.91和1.02,P>0.05)。CK20表达与肿瘤分级间无明显相关性。结论:CK20是诊断膀胱移行细胞癌的一种良好标志物,其特异性明显优于尿脱落细胞学。 相似文献
8.
膀胱癌HPSE基因启动子区低甲基化与临床病理特征相关性的研究 总被引:1,自引:0,他引:1
目的:探讨乙酰肝素酶(HPSE)基因启动子区甲基化与膀胱癌临床病理特征的相关性。方法:运用甲基化特异性聚合酶链反应(MSP)法检测27例膀胱癌标本及15例正常膀胱组织中HPSE基因启动子甲基化状态,并分析HPSE基因甲基化状态与不同临床病理特征的关系。结果:59.26%(16/27)膀胱癌组织HPSE基因启动子区发生低甲基化改变,另外2例甚至为完全去甲基化改变;而仅有3例(20.00%)正常膀胱组织HPSE基因启动子区发生低甲基化,Х^2=5.999,P=0.014。在17例伴淋巴结转移的患者中,发生HPSE基因低甲基化改变15例(88.23%),而在10例无淋巴结转移的患者中,发生HPSE基因低甲基化改变1例(10.00%)。HPSE低甲基化阳性率随淋巴转移而增高,Х^2=12.887,P=0.004。不同性别、年龄、瘤体大小、病理分级和临床分期与HPSE基因低甲基化无明显相关性,P〉0.05。结论:HPSE基因启动子区低甲基化为频发事件,提示与膀胱癌患者的不良预后相关,可作为膀胱癌判断预后的生物学标志。 相似文献
9.
目的 评估细胞角蛋白 2 0mRNA(CK2 0mRNA)是否可以作为膀胱癌临床诊断的一种有用标志物。方法 对 84例肉眼血尿患者的尿液进行尿脱落细胞学及CK2 0mRNA标记物RT/PCR检测。分析参数包括肿瘤数目、大小及WHO分级 ,术前或活检前尿脱落细胞学和CK2 0mRNA标志物。结果 病理活检证实 2 2例移行细胞癌中 ,CK2 0mRNA 18例为阳性 ,4例阴性 ;6 2例非膀胱癌患者中 ,CK2 0mRNA标志物 2例假阳性。与尿脱落细胞学比较 ,CK2 0mRNA标志物对膀胱移行细胞癌诊断的特异性和阳性预报值更高 ,分别为 96 .8%比 77.4 % (U =3.2 1,P <0 .0 1) ,90 %比 5 1.7% (U =2 .81,P <0 .0 1) ;但两者在敏感性和阴性预报值间无显著性差异 (U值分别为 :1.0 4和 1.2 1,P >0 .0 5 )。CK2 0mRNA表达与肿瘤分级间无明显相关性。结论 通过RT/PCR方法检测CK2 0mRNA是诊断膀胱移行细胞癌的一种良好生物标志物 ,其特异性明显优于尿脱落细胞学。 相似文献
10.
目的探讨P16基因甲基化在浅表性膀胱移行细胞癌发生早期的临床意义。方法取42例膀胱移行细胞癌组织及配对尿液标本,以其中9例的对侧正常膀胱黏膜组织作对照,采用甲基化特异性PCR方法检测P16基因CpG岛甲基化状态。结果35例肿瘤组织标本,18例P16基因CpG岛存在甲基化状态,占51.4%(18/35);尿液标本中,16例P16基因CpG岛存在甲基化状态,占45.7%(16/35)。Log istic回归分析显示年龄、性别、是否吸烟、合并其他疾病、肿瘤的临床分期和病理分型等因素对P16基因甲基化无影响(P〉0.05)。20例浅表性膀胱移行细胞癌患者的尿液标本中发现P16基因甲基化10例,其配对的浅表性膀胱移行细胞癌组织中均检出P16基因甲基化,正常人和非尿路肿瘤患者尿液中未检出到P16基因甲基化,尿液P16基因甲基化在浅表性膀胱移行细胞癌中的阳性预测值和特异度均为100%,假阳性为0%,灵敏度为90.91%。正常人组和非尿路肿瘤组与浅表性膀胱移行细胞癌组尿液中P16基因甲基化比较差异有统计学意义(P〈0.001),9例正常组织对照均未发现P16基因CpG岛甲基化。结论P16基因甲基化与年龄、性别、肿瘤的分级分期无相关性;尿液P16基因异常甲基化可成为浅表性膀胱移行细胞癌早期诊断的分子生物学标志。 相似文献
11.
目的:探讨尿细胞角蛋白检测与尿脱落细胞学检查在膀胱移行细胞癌诊断中的价值。方法:136例怀疑膀胱癌者,进行尿细胞角蛋白8和18的含量(UBC值)。检测与尿细胞学检查,其中87例经组织学证实为膀胱移行细胞癌。比较两者诊断膀胱癌的敏感性和特异性。结果:尿细胞角蛋白的敏感性为70.1%,特异性为73.3%;尿细胞学的敏感性为42.5%,特异性为83.7%。尿细胞角蛋白在膀胱癌不同分级和分期中的敏感性优于尿细胞学(P<0.05)。结论:尿细胞角蛋白的检测在早期诊断膀胱癌方面优于尿细胞学检查,可作为膀胱癌的早期检测指标。 相似文献
12.
CpG hypermethylation of promoter region and inactivation of E-cadherin gene in human bladder cancer 总被引:8,自引:0,他引:8
Ribeiro-Filho LA Franks J Sasaki M Shiina H Li LC Nojima D Arap S Carroll P Enokida H Nakagawa M Yonezawa S Dahiya R 《Molecular carcinogenesis》2002,34(4):187-198
Several studies have shown that E-cadherin expression is lost during malignant transformation. We hypothesized that CpG methylation in the promoter region may inactivate the expression of the E-cadherin gene in human bladder cancer. Normal and bladder cancer samples from 51 patients were compared in terms of E-cadherin gene expression and methylation status by immunohistochemistry, methylation-specific polymerase chain reaction (MSP), and bisulfite genome-sequencing techniques. Ten different CpG sites (nt 863, 865, 873, 879, 887, 892, 901, 918, 920, and 940) in the promoter region were studied. Thirty-five of 51 (69%) bladder cancer samples lacked E-cadherin expression, whereas only six of 51 (12%) normal bladder samples lacked E-cadherin immunoreactivity. MSP analysis of bladder cancer samples suggested that 43 of 51 (84%) showed methylation of the promoter region, whereas only 12 of 51 (24%) normal bladder samples showed hypermethylation. Sodium bisulfite genome-sequencing analysis revealed that of 10 CpG sites, two sites (nt 892 and nt 940) showed 100% methylation in all the cancer samples analyzed. Other CpG sites were partially methylated (47-91%). Normal tissue showed only 12% methylation (range, 1-33%) on various CpG sites. Also supporting these data, E-cadherin-negative bladder cancer cell lines restored expression of the E-cadherin gene after treatment with the demethylating agent 5-aza-2'-deoxycytidine. The present study showed that CpG hypermethylation was an important mechanism of E-cadherin gene inactivation in bladder cancer and also that specific CpG sites consistently presented higher methylation levels than others. These findings may provide a better strategy for the diagnosis and management of bladder cancer. 相似文献
13.
Makito Miyake Yasushi Nakai Satoshi Anai Yoshihiro Tatsumi Masaomi Kuwada Sayuri Onishi Yoshitomo Chihara Nobumichi Tanaka Yoshihiko Hirao Kiyohide Fujimoto 《Cancer science》2014,105(5):616-622
Bladder urothelial carcinoma is diagnosed and followed up after transurethral resection using a combination of cystoscopy, urine cytology and urine biomarkers at regular intervals. However, cystoscopy can overlook flat lesions like carcinoma in situ, and the sensitivity of urinary tests is poor in low‐grade tumors. There is an emergent need for an objective and easy urinary diagnostic test for the management of bladder cancer. In this study, three different modalities for 5‐aminolevulinic acid (ALA)‐based photodynamic diagnostic tests were used. We developed a compact‐size, desktop‐type device quantifying red fluorescence in cell suspensions, named “Cellular Fluorescence Analysis Unit” (CFAU). Urine samples from 58 patients with bladder cancer were centrifuged, and urine sediments were then treated with ALA. ALA‐treated sediments were subjected to three fluorescence detection assays, including the CFAU assay. The overall sensitivities of conventional cytology, BTA, NMP22, fluorescence cytology, fluorescent spectrophotometric assay and CFAU assay were 48%, 33%, 40%, 86%, 86% and 87%, respectively. Three different ALA‐based assays showed high sensitivity and specificity. The ALA‐based assay detected low‐grade and low‐stage bladder urothelial cells at shigher rate (68–80% sensitivity) than conventional urine cytology, BTA and NMP22 (8–20% sensitivity). Our findings demonstrate that the ALA‐based fluorescence detection assay is promising tool for the management of bladder cancer. Development of a rapid and automated device for ALA‐based photodynamic assay is necessary to avoid the variability induced by troublesome steps and low stability of specimens. 相似文献
14.
尿液检查在膀胱癌诊断和术后复发监测中的现状及进展 总被引:1,自引:0,他引:1
膀胱癌是我国男性泌尿生殖系统肿瘤中的最常见肿瘤.膀胱镜检查是诊断和治疗后随访的最主要手段,但其往往会带给患者痛苦和恐惧.无创性的尿液检查替代膀胱镜诊断膀胱癌、监测复发及判断预后,一直是研究的热点.除尿细胞学外,目前通过尿液检查诊断和监测膀胱癌复发主要有尿核基质蛋白22、膀胱肿瘤抗原、免疫-细胞检查法、纤维素和纤维蛋白降解产物及荧光原位杂交技术等方法,但敏感性和特异性均不十分理想.检测尿液的端粒酶、透明质酸和透明质酸酶的方法其敏感性和特异性较好,但尚未经多中心的研究证实.对膀胱癌尿液中新的肿瘤标志物的初步研究结果表明,微卫星体异常、一些基因启动子的异常甲基化、细胞角蛋白、survivin等在膀胱癌的诊断中有较大的应用价值,但目前这些方法均有其局限性.合理地联合应用上述无创性尿液分析手段,可望推迟或减少膀胱镜检查,但尚难以取代膀胱镜. 相似文献
15.
Mercedes Ingelmo‐Torres Cristina Gazquez María José Ribal Antonio Alcaraz 《International journal of cancer. Journal international du cancer》2013,133(11):2631-2641
Current standard methods used to detect and monitor bladder urothelial cell carcinoma (UCC) are invasive or have low sensitivity. The incorporation into clinical practice of a non‐invasive tool for UCC assessment would enormously improve patients' quality of life and outcome. This study aimed to examine the microRNA (miRNA) expression profiles in urines of UCC patients in order to develop a non‐invasive accurate and reliable tool to diagnose and provide information on the aggressiveness of the tumor. We performed a global miRNA expression profiling analysis of the urinary cells from 40 UCC patients and controls using TaqMan® Human MicroRNA Array followed by validation of 22 selected potentially diagnostic and prognostic miRNAs in a separate cohort of 277 samples using a miRCURY LNA? qPCR system. miRNA‐based signatures were developed by multivariate logistic regression analysis and internally cross‐validated. In the initial cohort of patients, we identified 40 and 30 aberrantly expressed miRNA in UCC compared with control urines and in high compared with low grade tumors, respectively. Quantification of 22 key miRNAs in an independent cohort resulted in the identification of a six miRNA diagnostic signature with a sensitivity of 84.8% and specificity of 86.5% (AUC = 0.92) and a two miRNA prognostic model with a sensitivity of 84.95% and a specificity of 74.14% (AUC = 0.83). Internal cross‐validation analysis confirmed the accuracy rates of both models, reinforcing the strength of our findings. Although the data needs to be externally validated, miRNA analysis in urine appears to be a valuable tool for the non‐invasive assessment of UCC. 相似文献
16.
目的:研究贲门腺癌(gastric cardiac adenocarcinoma,GCA)中E-钙黏蛋白(E—cadherin)的基因甲基化状态及其蛋白表达情况。方法:分别应用巢式甲基化特异性PCR(methylation specific PCR,MSP)方法及免疫组织化学SP法检测贲门癌组织及相应癌旁组织的甲基化和蛋白表达情况。结果:92例贲门癌组织中有63例E—cadherin发生了甲基化,甲基化率为68.5%,显著高于癌旁正常组织(P〈0.001);Ⅲ期和Ⅳ期的发生率明显高于Ⅰ期和Ⅱ期患者(P=0.01);低分化腺癌组发生甲基化的比率显著高于中、高分化腺癌组(P〈0.01)。92例贲门癌组织中有51例蛋白表达呈明显的异质性.贲门癌组织的E-cadherin蛋白表达率为44.6%,与相应癌旁正常组织相比差异有统计学意义(P〈0.001)。Ⅲ期和Ⅳ期患者的蛋白表达明显低于Ⅰ期和Ⅱ期患者(P〈0.01);低分化腺癌组的蛋白表达率也低于中、高分化腺癌组,差异有统计学意义(P〈0.05)。结论:E—cadherin基因启动子区发生甲基化导致的基因沉默可能是贲门腺癌发生的机制之一,可作为反映贲门腺癌生物学行为的指标。 相似文献