血清miR-6861-5p检测在乳腺癌临床诊治中的价值探讨

  目的  研究miR-6861-5p在乳腺癌患者血清中的表达,并探讨miR-6861-5p表达在乳腺癌患者临床诊治中的价值。  方法  通过实时荧光定量PCR法（RT-qPCR）检测2012年1月至2015年6月山东省德州市第二人民医院112例乳腺癌患者、37例乳腺良性病变和53例健康女性血清miR-6861-5p相对表达量,分析血清miR-6861-5p表达与乳腺癌患者临床病理和术后复发之间的关系,并探讨其表达对乳腺癌的临床诊断价值。  结果  乳腺癌患者血清miR-6861-5p相对表达量为（7.99±1.63）,显著高于良性病变患者（6.45±1.06）（P＜0.05）和健康研究对象（6.43±1.28）（P＜0.05）;血清miR-6861-5p表达与乳腺癌患者淋巴结转移、肿瘤组织ER、PR和HER-2表达、TNM分期、分子分型以及组织学分期显著相关（均P＜0.05）;肿瘤切除后乳腺癌患者血清miR-6861-5p表达量显著降低;治疗前血清miR-6861-5p诊断乳腺癌的敏感度和特异度分别为69.6%和77.8%,且与乳腺癌患者术后复发率有关。  结论  miR-6861-5p在乳腺癌患者血清中表达上调,是术前乳腺癌诊断、肿瘤分期、癌细胞转移和术后监测乳腺癌复发的潜在生物标志物。      

血清中miR-155与乳腺癌的相关性

目的分析血清中miR-155的表达水平,探讨其与乳腺癌临床病理特征之间的关系。方法收集2010年12月至2011年4月入院的67例女性患者（乳腺癌45例,非乳腺癌22例）的血液标本,分离血清并提取miRNA,通过荧光实时定量PCR法检测血清中miR-155的表达水平,分析其与乳腺癌临床病理特征间的相关性。结果乳腺癌患者相比非乳腺癌患者,腋窝淋巴结转移阳性乳腺癌患者相比阴性患者血清中miR-155表达水平均上调（均P〈0．05）;在乳腺癌患者中,肿瘤大小为T1的相比T2和r乃患者,I、Ⅱ期相比Ⅲ期患者,ER、PR阳性相比阴性患者血清中的miR-155表达水平均下调（均P〈0．05）。结论血清中miR．155的表达水平与乳腺癌及其临床病理特征密切相关。miR-155可成为新-代的乳腺癌标志物,并为乳腺癌发病机制及治疗和预后判断研究提供-个新方向。     

MicroRNA-100在胃癌患者血清中的表达及临床意义

  目的  探讨MicroRNA-100（miR-100）在胃癌患者血清中的表达及临床意义。  方法  选择蚌埠医学院第一附属医院手术及随访资料完整的胃癌患者（40例）和健康对照者（40例）为研究对象,提取血清总miRNA,在建立了稳定、敏感的血清miR-100绝对定量检测方法（qRT-PCR）的基础上,检测胃癌和健康对照者血清中miR-100表达水平。分析胃癌和健康对照者血清中miR-100表达差异及血清中miR-100表达水平与胃癌临床病理参数的关系。  结果  胃癌患者血清中miR-100的表达水平为（2.78±1.92）fmol/L,显著高于健康对照者[（0.19±0.15）fmol/L,P < 0.01],同时miR-100的受试者工作特征曲线显示,血清miR-100对胃癌诊断具有良好的特异度和敏感度（曲线下面积0.985）;进一步分析发现:血清中miR-100的表达与性别、年龄、肿瘤直径大小、浸润深度、分化程度、淋巴结转移数量、TNM分期等无明显差异（P > 0.05）。  结论  血清miR-100的检测可能有助于胃癌的诊断。      

乳腺癌中BAG-1 EGFR和PARP-1的表达及其临床意义

  目的  观察乳腺癌组织芯片中BAG-1、EGFR和PARP-1的表达及其与临床病理指标的相关性,并探讨其临床意义。  方法  采用免疫组织化学法对159例组织芯片中乳腺癌和癌旁组织点行BAG-l、EGFR及PARP-1蛋白检测,同时分析其与临床病理指标的相关性。  结果  乳腺癌组织中BAG-1、EGFR、PARP-1蛋白表达水平显著高于癌旁组织（P < 0.05）。BAG-1蛋白表达水平与年龄、肿瘤部位、淋巴结转移数目、临床分期均无明显相关性,但与肿瘤大小、组织学分级、ER、PR和HER-2表达以及分子分型有关（P < 0.05）;EGFR蛋白表达水平与肿瘤大小、临床分期以及分子分型有明显相关性（P < 0.05）;PARP-1与组织学分级、淋巴结转移数目、ER表达以及分子分型有关（P < 0.05）。119例病例中BAG-1蛋白表达与EGFR、PARP-1蛋白表达无明显相关性,但在三阴性乳腺癌（TNBC）中BAG-1蛋白表达与PARP-1蛋白表达呈正相关（P < 0.05）。单因素分析结果显示,BAG-1、PARP-1蛋白表达和分子分型是影响乳腺癌患者预后的因素。多因素分析结果显示,BAG-1、PARP-1蛋白表达是影响乳腺癌患者预后的独立危险因素。  结论  乳腺癌中BAG-1、EGFR和PARP-1蛋白高表达提示其可能参与乳腺癌的发生发展,BAG-1、EGFR和PARP-1高表达可作为乳腺癌诊治和预后的生物指标。      

TACC3 mRNA及蛋白在乳腺癌中的表达及其临床意义

  目的  探讨转录相关酸性卷曲蛋白3（transforming acidic coiled-coil proteins, TACC3）mRNA和蛋白在乳腺癌中的表达及其临床意义。  方法  收集手术切除乳腺癌及癌旁正常组织标本各85例, 进行免疫组织化学染色、RT-PCR、Western blot的检测。  结果  乳腺癌组织中的TACC3 mRNA和蛋白的表达水平高于癌旁组织（P < 0.05）, 且TACC3的表达与乳腺癌的分化程度、肿瘤直径、淋巴结的转移、P53表达相关, 而与患者的年龄、是否绝经、ER、PR、Ki-67、HER-2等无明显相关。  结论  TACC3在乳腺癌中的表达程度与临床病理特征有关, 在乳腺癌发生发展过程中可能具有一定的作用。      

80例结肠癌患者血浆、组织中microRNA 100/200c表达水平与临床病理的相关性

摘 要：［目的］ 研究结肠癌患者血浆、组织中小分子非编码RNA (microRNA,miRNA) 100/200c表达水平与临床病理的相关性。［方法］ 用实时定量PCR方法测定确诊为结肠癌的80例患者血浆miRNA 100、结肠癌组织中miRNA 200c表达水平并与其在正常人群血浆及癌旁正常组织中的表达进行比较。［结果］ 结肠癌患者血浆中miRNA 100的表达水平显著性低于正常人群（P=0.014）,结肠癌组织中miRNA 200c表达量显著性低于癌旁正常组织（P=0.0002）;结肠癌患者血浆中miRNA 100相对表达量与肿瘤分化程度、发生转移、临床分期显著性相关（P＜0.05）,且miRNA 100表达高低与患者的肿瘤直径,临床分期、淋巴结转移相关（P<0.05）;结肠癌组织中miRNA 200c表达量与发生转移、临床分期显著性相关（P＜0.05）,miRNA2000表达高低与肿瘤直径大小相关（P＜0.05）。［结论］ 与在正常组织或血浆中相比,miRNA 100/200c在结肠癌中表达量降低,与肿瘤远处转移、淋巴结转移、临床分期等病理参数密切相关。     

乳腺癌端粒酶活性及多项生物学指标表达与临床相关性分析研究

目的研究乳腺癌组织中端粒酶活性的表达,探讨端粒酶活性与ER、PR、CerbB-2、PCNA及Cath-D的相关性,分析其与乳腺癌肿瘤大小、临床分期、病理组织学分型及淋巴结转移的关系.方法采用PCR-ELISA法和免疫组化技术,检测乳腺癌组织中的端粒酶活性,ER、PR、CerbB-2、PCNA及Cath-D的蛋白表达水平.结果在乳腺癌组织中端粒酶活性、ER、PR、CerbB-2、PCNA及Cath-D阳性表达率分别为82.0%、67.5%、65.0%、65.0%、77.5%、52.5%.端粒酶活性与乳腺癌肿瘤大小、临床分期、淋巴结转移有相关性,与病理组织学分型无相关性.端粒酶活性与ER有相关性,与PR、CerbB-2、PCNA 、Cath-D的表达无相关性.结论端粒酶活性与ER水平、肿瘤大小、临床分期、淋巴结转移有相关性,可作为评估乳腺癌预后的分子生物学指标.     

同期腋窝转移淋巴结受体检测在激素受体阴性乳腺癌中的临床意义

  目的   探讨同期腋淋巴结转移病灶雌激素受体（estrogen receptor,ER）和孕激素受体（progesterone receptor,PR）补测在激素受体阴性浸润性乳腺癌中的临床意义。   方法   观察2012年7月至2013年1月,重庆医科大学附属第一医院内分泌乳腺外科门诊随访及住院患者中补测激素受体阴性乳腺癌同期腋淋巴结转移病灶ER和PR的表达情况,所有标本（包括原发癌病灶及同期腋淋巴结转移病灶）的免疫组织化学检测均由重庆医科大学病理检测中心进行,根据检测报告,原发病灶阴性而腋淋巴结转移病灶ER和/或PR阳性者补加内分泌治疗。   结果   56例激素受体阴性乳腺癌中,同期腋淋巴结转移病灶ER阳性8例（14.3%）,PR阳性2例（3.6 %）,ER和PR均阳性3例（5.4%）,共13例（23.3%）因补查腋淋巴结转移病灶ER和/或PR变阳性而在随访中加用内分泌治疗。肿瘤原发病灶与腋转移淋巴结ER和PR均阴性43例（76.7%）,即肿瘤原发癌病灶与腋转移淋巴结ER和PR均为阴性表达的总符合率为76.7%,不一致率为23.3%。   结论   受体阴性浸润性乳腺癌原发病灶与腋淋巴结转移病灶ER和PR表达具有一定的不一致性,对原发癌病灶激素受体阴性乳腺癌患者应检查其同期腋淋巴结转移病灶受体的表达,可能筛查出原发病灶受体阴性而复发转移病灶受体阳性患者,及时加用内分泌治疗,提高该类患者的疗效,亦可解释部分激素受体阴性而内分泌治疗也有一定疗效的原因。      

AR在不同ER状态乳腺癌中的表达及临床病理意义

  目的  探讨雄激素受体（AR）在不同雌激素受体（ER）状态乳腺癌中的表达与临床病理特征间的关系及预后。  方法  从乳腺浸润性导管癌ER阳性和阴性病例中分别随机选取111例（ER+组）与113例（ER-组）,共计224例。采用免疫组化方法检测AR、ER、PR、HER-2、Ki-67、P53表达,对不同ER状态乳腺癌中AR表达与临床病理资料及预后因素进行分析。  结果  AR在浸润性导管癌中的阳性表达率为67.9%（152/224）,ER+组和ER-组分别为80.2%（89/111）、55.8%（63/113）。ER+组中AR的表达与肿瘤大小、组织学分级、pTNM分期和有无淋巴结转移相关（P < 0.05）;在ER-组中AR的表达与组织学分级、HER-2表达、绝经状态相关（P < 0.05）。单因素生存分析显示在ER+组和ER-组AR阳性者均具有较好的预后（P < 0.001,P=0.046）,Cox多因素回归分析显示在ER+组AR表达可作为影响无瘤生存的独立因素。  结论  AR可以作为指导临床内分泌治疗新的靶标,为不同ER状态乳腺癌激素治疗提供依据。      

乳腺癌外周血标记物NPY1R的检测及临床意义

  目的  鉴定一种新的检测乳腺癌循环癌细胞的肿瘤标记物NPY1R(neuropeptide Y receptor Y1)。探讨NPY1R在乳腺癌外周血中的表达水平及其与临床病理学特征的关系。  方法  通过肿瘤基因组解剖计划(cancer genome anatomy project, CGAP)数据库的数字基因表达演示工具(digital gene expression displayer, DGED), 发现了一种新的乳腺癌外周血标记物NPY1R。采用实时半定量巢式PCR技术, 检测了142例乳腺癌和60例正常人外周血中NPY1R的表达水平, 并进一步分析了NPY1R表达与乳腺癌临床病理特征的相关性。对131例患者随访38个月, 观察NPY1R的表达对乳腺癌患者生存时间的影响。  结果  证实NPY1R在142例乳腺癌外周血中的表达水平明显高于正常组(P < 0.01)。并且, NPY1R在外周血中的表达水平与临床分期、淋巴结转移和ER、PR、HER2具有相关性(P < 0.05)。131例随访患者中, NPY1R表达阳性组的生存率显著低于阴性组(P < 0.01)。  结论  NPY1R是外周血循环癌细胞一种新的肿瘤标记物, 可作为判断乳腺癌转移和预后的评估指标。      

血清外泌体miR-148a联合miR-106a检测用于胃癌筛查的研究探讨

  目的  寻找合适的外泌体miRNA作为肿瘤生物标志物，辅助临床进行胃癌筛查。  方法  将miR-148a及miR-106a作为潜在标志物，研究两种miRNA在癌组织及癌旁组织表达的差异性。选取2017年9月至2018年9月在福建省立医院诊治的初诊胃癌术后标本共37对（胃癌组织及癌旁组织）进行组织学miRNA检测。选取初诊胃癌患者83例为胃癌组，良性病变的患者78例为对照组，全部进行血清外泌体miRNA检测。  结果  与癌旁组织相比，癌组织中miR-148a表达水平降低，miR-106a表达水平升高，联合检测2-△△CP[△CP=CP_{（miR-148a）}-CP_{（miR-106a）}]值降低。与对照组相比，胃癌患者中血清外泌体miR-106a表达水平降低，联合检测2-△△CP值升高。血清外泌体联合检测2-△△CP值对胃癌组和对照组鉴别的曲线下面积[AUC为0.844（95%CI:0.782~0.905，P < 0.001）]，大于miR-148a及miR-106a单独检测，其cut-off值为0.315 3，敏感度为91，6%，特异度为64.1%。  结论  血清外泌体miR-148a联合miR-106a检测的2-△△CP值可以作为胃癌筛查的手段。      

Analysis of miR-205 and miR-155 expression in the blood of breast cancer patients

The purpose of this study was to identify and validate circulating microRNAs (miRNAs) in human plasma for use as breast cancer (BC) biomarkers and to analyze their relationship to clinicopathologic features and its preliminary biological function. Genome-wide expression profiling of miRNAs in BC was investigated by microarray analysis. miR-155 was up-regulated greater than two-fold in BC compared with Normal Adjacent Tissue (NAT), whereas let-7b, miR-381, miR-10b, miR-125a-5p, miR-335, miR-205 and miR-145 were down- regulated greater than two-fold. Our hypothesis was that circulating miRNAs are also present and differentially expressed in the serum of BC patients compared to controls. Using real-time PCR (RT-PCR), we analyzed miR-205 and miR-155 in archived serum from 30 participants, 20 with breast cancer and 10 healthy people. miR-205 was down-regulated in BC patient serum while miR-155 was up-regulated. Furthermore, we analyzed the relationship between the expression levels of these two miRNAs and the clinicopathologic parameters of BC patients. High expression of miR155 was associated with clinical stage, molecular type, Ki-67 and p53 in BC patients (P<0.05). By contrast, we found no significant correlation between miR-205 and BC patient clinicopathologic parameters. Functional analysis showed that ectopic expression of miR-205 significantly inhibits cell proliferation and promotes apoptosis. miR-205 was down-regulated and miR-155 was up-regulated in BC patient serum. miR-155 was positive correlated with clinical stage and ki-67 and negatively correlated with p53 status.     

Expression of microRNAs in the urine of patients with bladder cancer

BackgroundMicroRNAs (miRNA) have been implicated to play an important role in the pathogenesis of a variety of cancers. We studied the levels of miRNAs related to epithelial-mesenchymal transition (EMT) in the urine of patients with bladder cancer.MethodThe expression of the miR-200 family, miR-205, miR-192, miR-155, and miR-146a in the urine sediment and supernatant of 51 patients with bladder cancer and in 24 controls was determined by real-time quantitative polymerase chain reaction.ResultsCompared with controls, the patients with bladder cancer had a lower expression of the miR-200 family, miR-192, and miR-155 in the urinary sediment; lower expression of miR-192; and higher expression of miR-155 in the urinary supernatant. The expression of the miR-200 family, miR-205, and miR-192 in the urine sediment significantly correlated with urinary expression of EMT markers, including zinc finger E-box-binding homeobox 1, vimentin, transforming growth factor β1, and Ras homolog gene family, member A. Furthermore, the levels of miR-200c and miR-141 in the urine sediment became normalized after surgery.ConclusionWe found that the urinary miR-200 family, miR-155, miR-192, and miR-205 levels are depressed in patients with bladder cancer. The level of these miRNA targets in urine has the potential to be developed as noninvasive markers for bladder cancer.     

Plasma Circulating Mirnas Profiling for Identification of Potential Breast Cancer Early Detection Biomarkers

Objective: This study aimed to characterize the miRNA expression profiles from plasma samples of our local breast cancer patients in comparison to healthy control by using miRNA PCR Array. Methods: In this study, plasma miRNA profiles from eight early-stage breast cancer patients and nine age-matched (± 2 years) healthy controls were characterized by miRNA array-based approach, followed by differential gene expression analysis, Independent T-test and construction of Receiver Operating Characteristic (ROC) curve to determine the capability of the assays to discriminate between breast cancer and the healthy control. Results: Based on the 372-miRNAs microarray profiling, a set of 40 differential miRNAs was extracted regarding to the fold change value at 2 and above. We further sub grouped 40 miRNAs of breast cancer patients that were significantly expressed at 2-fold change and higher. In this set, we discovered that 24 miRNAs were significantly upregulated and 16 miRNAs were significantly downregulated in breast cancer patients, as compared to the miRNA expression of healthy subjects. ROC curve analysis revealed that seven miRNAs (miR-125b-5p, miR-142-3p, miR-145-5p, miR-193a-5p, miR-27b-3p, miR-22-5p and miR-423-5p) had area under curve (AUC) value > 0.7 (AUC p-value < 0.05). Overlapping findings from differential gene expression analysis, ROC analysis, and Independent T-Test resulted in three miRNAs (miR-27b-3p, miR-22-5p, miR-145-5p). Cohen’s effect size for these three miRNAs was large with d value are more than 0.95. Conclusion: miR-27b-3p, miR-22-5p, miR-145-5p could be potential biomarkers to distinguish breast cancer patients from healthy controls. A validation study for these three miRNAs in an external set of samples is ongoing.     

Clinical significance of miR-155 expression in breast cancer and effects of miR-155 ASO on cell viability and apoptosis

Accumulating evidence shows that mircroRNAs (miRNAs) play a vital role in tumorigenesis. miR-155 is one of the most multifunctional miRNAs whose overexpression has been found to be associated with different types of cancer including breast cancer. To further determine the potential involvement of miR-155 in breast cancer, we evaluated the expression levels of miR-155 by real-time PCR and correlated the results with clinicopathological features. Matched non-tumor and tumor tissues of 42 infiltrating ductal carcinomas and 3 infiltrating lobular carcinomas were analyzed for miR-155 expression by real-time PCR. Further, we used an antisense technique to inhibit miR-155 expression in vitro. WST-8 test was performed to evaluate cell viability and apoptosis assay was used to investigate the effect of the miR-155 antisense oligonucleotide (miR-155 ASO) on HS578T cell death. The expression levels of miR-155 were significantly higher in tumor tissues than the levels in matched non-tumor tissues (P<0.001). Up-regulated miR-155 expression was associated with lymph node positivity (P=0.034), higher proliferation index (Ki-67 >10%) (P=0.019) and advanced breast cancer TNM clinical stage (P=0.002). Interestingly, we next found that miR-155 expression levels had close relations with ER status (P=0.041) and PR status (P=0.029). Transfection efficiency detected by flow cytometry was higher than 70%, the WST-8 test showed that viability of HS578T cells was greatly reduced after transfection with miR-155 ASO compared with the scramble (SCR) group or the liposome group. The Annexin V-FITC/PI assay also indicated that transfection with miR-155 ASO promoted apoptosis.     

血清外泌体miRNAs联合CA72-4在胃癌诊断中的价值分析

  目的  筛选胃癌患者及健康人血清外泌体miRNAs,探究miRNAs联合肿瘤标记物在胃癌诊断中的价值。  方法  选取2020年4月至2021年4月在苏州大学附属第一医院确诊胃癌的46例患者为胃癌组,同期20例健康体检者为对照组,收集两组血清标本,行血清外泌体miRNAs测序,筛选并验证差异性表达的miRNAs,将验证后的miRNAs表达水平、肿瘤标志物数值与胃癌诊断行Spearman相关分析,并绘制受试者工作特征（receiver operating characteristic ,ROC）曲线,分别分析外泌体miRNAs、CA72-4及两者联合在胃癌诊断中的价值。  结果  两组血清外泌体共筛选出376个差异表达的miRNAs,经q-PCR验证,仅4个miRNAs差异具有统计学意义,采用ROC曲线判断外泌体miRNAs在胃癌诊断中的效能:miR-1323、miR-26a-5p、miR-202-3p、miR-96-5p诊断胃癌的曲线下面积（area under curve,AUC）分别为0.908、0.815、0.570、0.547,灵敏度分别为71.7%、67.4%、30.4%、19.6%,特异度分别100%、85.0%、90.0%、100%。Spearman相关分析结果提示:miR-26a-5p、miR-1323和CA72-4与胃癌诊断相关,ROC曲线显示:miR-26a-5p、miR-1323和CA72-4三者联合诊断的曲线下面积为0.967,高于三者单独诊断效能,其灵敏度和特异度分别为87.0%、100%。  结论  联合检测血清外泌体miR-26a-5p、miR-1323和CA72-4的表达水平,在胃癌诊断中具有潜在价值。      

非小细胞肺癌吉非替尼耐药相关miRNAs的筛选鉴定

  目的  miRNA是一类通过结合mRNA调节基因表达的非编码单链小分子RNA,本研究目的是探讨非小细胞肺癌（NSCLC）中miRNA与吉非替尼耐药的关系。  方法  CCK8法检测NSCLC吉非替尼耐药细胞PC9/GR相对于亲本细胞PC9的耐药倍数;miRNA芯片检测PC9/GR与PC9中miRNA的表达差异;RT-PCR验证miRNA芯片结果。将差异表达的miRNA模拟物/抑制剂转染至PC9/GR中,观察其对吉非替尼敏感性的影响。  结果  吉非替尼对PC9和PC9/GR的IC₅₀值分别为42.89 nmoL/L和3.87 μ moL/L,耐药倍数为90.23倍。miRNA芯片结果显示,PC9/GR与PC9比较55条有差异表达miRNAs（P < 0.01）,其中在PC9/GR上调的miRNAs有21条,包括miRNA-1 246、miRNA-125b等;下调的miRNAs有34条,包括miRNA-224、miRNA-125a~5p等。RT-PCR进一步验证其中9条miRNAs,有8条与芯片结果趋势一致。将上述8条miRNAs的模拟物/抑制剂转染至PC9/GR中,发现miRNA-125a~5p模拟物可降低吉非替尼敏感性。  结论  PC9/GR与PC9的miRNA表达存在差异,miRNA可能与NSCLC吉非替尼耐药相关,miRNA-125a~5p可促进PC9/GR对吉非替尼产生耐药。