Clinicopathological and prognostic significance of microRNA-107 and its relationship to DICER1 mRNA expression in gastric cancer

microRNAs (miRNAs) are small non-coding RNAs that regulate target gene expression. It is known that miRNA-107 (miR-107) promotes cancer invasion and metastasis. However, the relationship between clinicopathological factors and the prognostic significance of miR-107 for gastric cancer patients remains elusive. In this study, we evaluated the prognostic value of miR-107 using tissue samples from gastric cancer patients. Furthermore, the relationship between miR-107 and the mRNA levels of its target gene DICER1 was examined. The expression levels of miR-107 and DICER1 mRNA in tumor tissues and adjacent normal tissues of 161 gastric cancer patients were examined (TNM stage I, 29 patients; stage II, 31 patients; stage III, 51 patients and stage IV, 50 patients). miR-107 levels were measured by Taqman microRNA assays, and DICER1 mRNA levels were measured by the Taqman real-time RT-PCR method. In the analysis by real-time PCR-based miRNA arrays using pooled RNA samples from five gastric cancer patients, expression of miR-107, miR-21, miR-196a, miR-26b, miR-9, miR-142-3p, miR-30b, miR-150, miR-191 and miR-17 was found to be upregulation. The mean expression level of miR-107 was significantly higher in the tumor tissues compared to that of normal tissues. In the comparison of clinicopathological factors, miR-107 expression showed significant association with depth of tumor invasion, lymph node metastasis and stage. In Kaplan-Meier survival curve analysis, overall survival rates (OS) and disease-free survival rates (DFS) of patients with high miR-107 expression were significantly worse than those of patients with low miR-107 expression. In the Cox multivariate analysis, it was shown that miR-107 expression in gastric cancer tissues was an independent prognostic factor for OS and DFS. Significant inverse correlations were demonstrated between miR-107 and DICER1 mRNA. Our results indicate that miR-107 may be useful as an effective biomarker for prediction of a poor prognosis in gastric cancer patients.     

MiRNA expression signature for potentially predicting the prognosis of ovarian serous carcinoma

One of the best prognostic predictors for patients with epithelial ovarian cancer is the Federation of Obstetrics and Gynecology (FIGO) stage at diagnosis. Advanced-stage ovarian serous carcinoma (OSC) generally have poor prognosis. The goal of this study is to develop and validate a miRNA expression profile that can differentiate the OSC at early and advanced stages and study its correlation with the prognosis of OSC. To identify a unique microRNA (miRNA) pattern associated with the progression of OSC at early and advanced stages, a miRNA microarray was performed using Chinese tumor bank specimens of patients with OSC stage I or III in a retrospective analysis. The expression of four dysregulated miRNAs was validated using quantitative real-time polymerase chain reaction (qRT-PCR) in an external cohort of 51 cases of OSC samples at stages I and III. Kaplan–Meier analysis was performed to analyze the correlation between the expression of some miRNAs and prognosis. Of the 768 miRNAs analyzed in the microarray, 26 miRNAs were significantly either up- or downregulated, with at least a 2-fold difference, in OSC stage I compared with stage III. The qRT-PCR results showed that miR-510, miR-509-5p, and miR-508-3p were significantly downregulated and that miR-483-5p was upregulated in stage III OSC compared with stage I, which was consistent with the microarray results. Kaplan–Meier analysis showed low miR-510 expression, low miR-509-5p expression, and advanced FIGO stage, and chemotherapy resistance were significantly associated with poorer overall survival (P?<?0.05). Our results suggest that miRNAs may play a role in the progression of OSC, and miR-510 and miR-509-5p may be considered novel-candidate clinical biomarkers for predicting OSC outcome.     

miR-141-3p在胃癌组织和患者血浆中的表达及其临床意义

目的:检测miR-141-3p在胃癌组织及患者血浆中的表达水平,探讨其表达水平与患者病理特征和预后的关系.方法:收集河北医科大学第四医院普外科2012年5月至2013年1月胃癌根治性手术切除的组织标本及术前外周静脉血标本44例,每例标本采集肿瘤组织(非坏死部分)和配对的癌旁组织.采用实时荧光定量PCR法检测miR-141-3p在胃癌组织、癌旁组织、血浆及健康志愿者血浆(25例)的表达情况,分析miR-141-3p的表达水平与胃癌患者DFS及临床病理特征的关系.结果:miR-141-3p在胃癌组织中的表达明显降低,在血浆中的表达水平明显升高(均P＜0.01).在胃癌组织中miR-141-3p高表达组DFS明显高于低表达组(21.8 vs 10.3个月,P＜0.01),且miR-141-3p在癌组织中的表达水平与患者DFS呈正相关(P＜0.01).在血浆中miR-141-3p的高表达组DFS明显低于低表达组(9.1 vs 21.0个月,P＜0.01),且miR-141-3p血浆中的表达水平与患者DFS呈负相关(P＜0.01).miR-141-3p在胃癌患者血浆中表达水平与肿瘤TNM分期、淋巴结转移及脉管瘤栓相关(P＜0.01).结论:miR-141-3p在胃癌组织中表达显著降低且与患者预后呈正相关,其在患者血浆中表达显著升高且与患者预后呈负相关,表明miR-141-3p可作为胃癌早诊早治及患者临床预后判定的潜在标志物.     

MicroRNA profiling and prediction of recurrence/relapse-free survival in stage I lung cancer

About 30% stage I non-small cell lung cancer (NSCLC) patients undergoing resection will recur. Robust prognostic markers are required to better manage therapy options. MicroRNAs (miRNAs) are a class of small non-coding RNAs of 19-25 nt and play important roles in gene regulation in human cancers. The purpose of this study is to identify miRNA expression profiles that would better predict prognosis of stage I NSCLC. MiRNAs extracted from 527 stage I NSCLC patients were profiled on the human miRNA expression profiling v2 panel (Illumina). The expression profiles were analyzed for their association with cancer subtypes, lung cancer brain metastasis and recurrence/relapse free survival (RFS). MiRNA expression patterns between lung adenocarcinoma and squamous cell carcinoma differed significantly with 171 miRNAs, including Let-7 family members and miR-205. Ten miRNAs associated with brain metastasis were identified including miR-145*, which inhibit cell invasion and metastasis. Two miRNA signatures that are highly predictive of RFS were identified. The first contained 34 miRNAs derived from 357 stage I NSCLC patients independent of cancer subtype, whereas the second containing 27 miRNAs was adenocarcinoma specific. Both signatures were validated using formalin-fixed paraffin embedded and/or fresh frozen tissues in independent data set with 170 stage I patients. Our findings have important prognostic or therapeutic implications for the management of stage I lung cancer patients. The identified miRNAs hold great potential as targets for histology-specific treatment or prevention and treatment of recurrent disease.     

Association of miR-193b Down-regulation and miR-196a up-Regulation with Clinicopathological Features and Prognosis in Gastric Cancer

Dysregulated expression of microRNAs (miRNAs) has been shown to be closely associated with tumordevelopment, progression, and carcinogenesis. However, their clinical implications for gastric cancer remainelusive. To investigate the hypothesis that genome-wide alternations of miRNAs differentiate gastric cancer tissuesfrom those matched adjacent non-tumor tissues (ANTTs), miRNA arrays were employed to examine miRNAexpression profiles for the 5-pair discovery stage, and the quantitative real-time polymerase chain reaction (qRTPCR)was applied to validate candidate miRNAs for 48-pair validation stage. Furthermore, the relationshipbetween altered miRNA and clinicopathological features and prognosis of gastric cancer was explored. Amonga total of 1,146 miRNAs analyzed, 16 miRNAs were found to be significantly different expressed in tissues fromgastric cancer compared to ANTTs (p<0.05). qRT-PCR further confirmed the variation in expression of miR-193band miR-196a in the validation stage. Down-expression of miR-193b was significantly correlated with Laurentype, differentiation, UICC stage, invasion, and metastasis of gastric cancer (p<0.05), while over-expression ofmiR-196a was significantly associated with poor differentiation (p=0.022). Moreover, binary logistic regressionanalysis demonstrated that the UICC stage was a significant risk factor for down-expression of miR-193b (adjustedOR=8.69; 95%CI=1.06-56.91; p=0.043). Additionally, Kaplan-Meier survival curves indicated that patientswith a high fold-change of down-regulated miR-193b had a significantly shorter survival time (n=19; mediansurvival=29 months) compared to patients with a low fold-change of down-regulated miR-193b (n=29; mediansurvival=54 months) (p=0.001). Overall survival time of patients with a low fold-change of up-regulated miR-196a (n=27; median survival=52 months) was significantly longer than that of patients with a high fold-changeof up-regulated miR-196a (n=21; median survival=46 months) (p=0.003). Hence, miR-193b and miR-196a maybe applied as novel and promising prognostic markers in gastric cancer.     

Down Regulated Expression Levels of miR-27b and miR-451a as a Potential Biomarker for Triple Negative Breast Cancer Patients Undergoing TAC Chemotherapy

Background: Triple negative breast cancer (TNBC) is associated with poor prognosis, aggressive phenotype(s) of tumours, partial chemotherapy response, and lack of clinically proven therapies. MicroRNAs (miRNAs) can target and modulate key genes that are involved in TNBC chemotherapy. Deregulated miRNA expression is highly involved in anti-cancer drug resistance phenotype and thus, miRNAs tend to be promising candidates for prediction of chemotherapy response and recurrence. Aim: This study aimed to investigate the expression levels of selected miRNAs (miR-21, miR-27b, miR-34a, miR-182, miR-200c and miR-451a) in cancerous and normal adjacent tissues of TNBC patients and to correlate with the clinicopathological data. Methods: Forty-one (41) FFPE tissue block of histopathologically confirmed TNBC patients was collected. Total RNA from the cancerous and adjacent non-cancerous tissues were isolated, transcribed, and pre-amplified. The relative expression level of miRNAs in tumour and normal adjacent tissues of TNBC patients was analysed using qRT-PCR. Results: Out of six miRNAs studied, the relative expression of miR-27b and miR-451a were found to be significantly lower in cancerous as compared to normal adjacent tissues of TNBC patients. In addition, a significant down regulation of miR-451a was also observed in infiltrating ductal carcinoma subtype, stages I and II, in both grade II and III, premenopausal and postmenopausal as well as in those with positive axillary lymph node metastases. Conclusion: The results suggest the possible utilization of miR-27b and miR-451a expression levels as potential predictive risk markers for TNBC patients undergoing TAC chemotherapy.     

DNA hypermethylation of microRNA-34b/c has prognostic value for stage Ⅰ non-small cell lung cancer

Lung cancer is the leading cause of cancer-related death in the world and approximately 30-40% of patients with stage Ⅰ non-small cell lung cancer (NSCLC) die of recurrent disease. miRNA expression profiles can be diagnostic and prognostic markers of lung cancer. Recently, miR-34 family has been shown to be part of the p53 pathway which is frequently involved in lung cancer, and the expression of miR-34 has been reported to be regulated by DNA methylation. In present study, we investigated the correlation between DNA methylation status of miR-34 family and recurrence of stage Ⅰ NSCLC patients. miR-34a and miR-34b/c promoter methylation status were determined by nested methylation-specific PCR in FFPE tumor tissues from 161 patients of stage Ⅰ NSCLC. Furthermore, mature miR-34b and miR-34c expression were analyzed by qRT-PCR in the same panel tissues. Our results revealed that aberrant DNA methylation of miR-34b/c was correlated with a high probability of recurrence (p = 0.026) and associated with poor overall survival (p = 0.010) and disease-free survival (p = 0.017). No significant association was found for miR-34a methylation. Multivariate analysis showed that promoter hypermethylation of miR-34b/c was an independent prognostic factor of stage Ⅰ NSCLC. Moreover, no significant association between mature miR-34b and miR-34c expression and DNA methylation status was found. In conclusion, we have identified promoter hypermethylation of miR-34b/c as a relatively common event in NSCLC and might be a potential prognostic factor for stage Ⅰ NSCLC.     

microRNA Expression Profile in Patients with Stage II Colorectal Cancer: A Turkish Referral Center Study

Background: There are increasing data about microRNAs (miRNA) in the literature, providing abundantevidence that they play important roles in pathogenesis and development of colorectal cancer. In this study, weaimed to investigate the miRNA expression profiles in surgically resected specimens of patients with recurrentand non-recurrent colorectal cancer. Materials and Methods: The study population included 40 patients withstage II colorectal cancer (20 patients with recurrent tumors, and 20 sex and age matched patients withoutrecurrence), who underwent curative colectomy between 2004 and 2011 without adjuvant therapy. Expression of16 miRNAs (miRNA-9, 21, 30d, 31, 106a, 127, 133a, 133b, 135b, 143, 145, 155, 182, 200a, 200c, 362) was verifiedby quantitative real-time polymerase chain reaction (qRT-PCR) in all resected colon cancer tissue samples andin corresponding normal colonic tissues. Data analyses were carried out using SPSS 15 software. Values werestatistically significantly changed in 40 cancer tissues when compared to the corresponding 40 normal colonictissues (p<0.001). MiR-30d, miR-133a, miR-143, miR-145 and miR-362 expression was statistically significantlydownregulated in 40 resected colorectal cancer tissue samples (p<0.001). When we compared subgroups,miRNA expression profiles of 20 recurrent cancer tissues were similar to all 40 cancer tissues. However in 20non-recurrent cancer tissues, miR-133a expression was not significantly downregulated, moreover miR-133bexpression was significantly upregulated (p<0.05). Conclusions: Our study revealed dysregulation of expressionof ten miRNAs in Turkish colon cancer patients. These miRNAs may be used as potential biomarkers for earlydetection, screening and surveillance of colorectal cancer, with functional effects on tumor cell behavior.     

miR-93-5p和miR-27a-3p在直肠癌组织中的表达及其意义

目的 探讨在直肠癌组织中呈现出特异性表达的miRNA与临床病理分期、肿瘤浸润深度、淋巴结转移等参数之间的关系及其可能的意义。方法 用微阵列基因芯片技术分析未经任何术前放化疗的71例直肠癌患者癌组织与癌旁组织间miRNA表达的区别,筛选出上调的miR-93-5p和下调的miR-27a-3p,扩大样本量后进行qRT-PCR验证,随后进行多种临床病理参数分析并探讨其可能存在的意义。结果 miR-27a-3p的表达在芯片检测中呈现出低表达,但在PCR验证时呈现出了高表达,且数据较为离散;miR-93-5p在两种检测方法中均显示出高表达的特性(癌组织表达量是癌旁组织的3.165倍,P=0.006),并与肿瘤体积(P=0.004)、治疗前癌胚抗原水平(P=0.001)及淋巴结转移数目(r=0.534,P=0.005)具有相关性,其中与治疗前癌胚抗原水平及淋巴结转移阳性组受侵数目存在正相关。结论 在直肠癌组织中存在特异性表达的miRNA。根据miR-93-5p和miR-27a-3p在直肠癌组织中的表达特点,miR-93-5p有望作为新型生物标记物,为直肠癌的临床诊疗提供参考价值。     

Identification of recurrence-related microRNAs in hepatocellular carcinoma following liver transplantation

Tumor recurrence-related microRNAs (miRNAs) in hepatocellular carcinoma (HCC) following orthotopic liver transplantation (OLT) are not clear yet. This study was designed to determine whether altered miRNA expression is associated with HCC recurrence and prognosis following OLT. 18 miRNAs, including 6 up-regulated and 12 down-regulated miRNAs were identified by microarray in primary HCC samples of patients who had developed HCC recurrence (n = 5) compared to those with non-recurrence (n = 5) following OLT by using p < 0.05 as cutoff value. The six most significantly altered miRNAs (fold change ≥ 2: miR-19a, miR-886-5p, miR-126, miR-223, miR-24 and miR-147) were further confirmed by qRT-PCR in the remaining 105 HCC samples. In receiver-operating characteristic curve analysis, this six miRNAs were of high sensitivity and specificity in predicting HCC recurrence. Using Cox regression and risk score analysis, we built a six-miRNA signature based on their qRT-PCR readings for the prediction of outcome of HCC following OLT. Kaplan-Meier and Cox proportional regression revealed this six-miRNA signature was a significant independent predictor of overall survival (log-rank p = 0.020) and recurrence-free survival (log-rank p < 0.001). Finally, the data were further reconfirmed in an independent cohort of 50 patients from another transplant center. In addition, bioinformatics Gene Ontology and pathway analysis were also performed to better understand the critical roles of these miRNAs in HCC recurrence. Our study, in addition to suggesting a different miRNA expression pattern between HCC samples of patients with recurrence and those with non-recurrence, proposes that this six-miRNA signature may serve as biomarker for prognosis of HCC patients following OLT.     

循环miR-29a和miR-150与非小细胞肺癌胸部放射治疗剂量的相关性

目的:探讨非小细胞肺癌（non-small cell lung cancer,NSCLC）胸部放射治疗剂量与循环血miR-29a和miR-150的相关性。方法:收集56例2014年1月至2015年12月在我院接受放射治疗的诊断为NSCLC的患者,其中5例NSCLC患者在0、20、40、60 Gy辐照后用miRNA芯片检测循环血miRNA表达差异;51例NSCLC患者在0、20、40 Gy辐照后用实时定量PCR验证循环血中候选miRNA表达;医用直线加速器（2 Gy/天,连续处理3天）辐照A549和MRC5细胞,实时定量PCR检测细胞内和细胞上清外泌体miR-29a和miR-150的表达。结果:miRNA芯片筛选出随着患者放疗剂量的增加而差异表达的10个miRNA（miR-29a、miR-150、miR-142、miR-342、miR-125b、miR-101、miR-425、miR-338、miR-126、miR-15b）。验证发现验证组患者0、20、40 Gy辐照后循环血miR-29a和miR-150表达具有统计学差异（P<0.05）。验证组循环miR-29a和miR-150分别与V5、V20、MLD、Mean Eso呈负相关。A549及MRC5细胞辐照3天后细胞内miR-29a和miR-150表达显著增加（P<0.05）,细胞上清外泌体中表达显著下降（P<0.05）。结论:循环血miR-29a和miR-150与NSCLC胸部放射治疗剂量相关。     

MicroRNA-30a inhibits cell migration and invasion by downregulating vimentin expression and is a potential prognostic marker in breast cancer

Tumor recurrence and metastasis result in an unfavorable prognosis for cancer patients. Recent studies have suggested that specific microRNAs (miRNAs) may play important roles in the development of cancer cells. However, prognostic markers and the outcome prediction of the miRNA signature in breast cancer patients have not been comprehensively assessed. The aim of this study was to identify miRNA biomarkers relating to clinicopathological features and outcome of breast cancer. A miRNA microarray analysis was performed on breast tumors of different lymph node metastasis status and with different progression signatures, indicated by overexpression of cyclin D1 and β-catenin genes, to identify miRNAs showing a significant difference in expression. The functional interaction between the candidate miRNA, miR-30a, and the target gene, Vim, which codes for vimentin, a protein involved in epithelial-mesenchymal transition, was examined using the luciferase reporter assay, western blotting, and migration and invasion assays. The association between the decreased miR-30a levels and breast cancer progression was examined in a survival analysis. miR-30a negatively regulated vimentin expression by binding to the 3'-untranslated region of Vim. Overexpression of miR-30a suppressed the migration and invasiveness phenotypes of breast cancer cell lines. Moreover, reduced tumor expression of miR-30a in breast cancer patients was associated with an unfavorable outcome, including late tumor stage, lymph node metastasis, and worse progression (mortality and recurrence) (p < 0.05). In conclusion, these findings suggest a role for miR-30a in inhibiting breast tumor invasiveness and metastasis. The finding that miR-30a downmodulates vimentin expression might provide a therapeutic target for the treatment of breast cancer.     

miR-520a在结肠癌组织中的表达及意义

目的:探讨miR-520a在结肠腺瘤性息肉、结肠癌及癌旁组织中的表达变化,并分析miR-520a在结肠癌中的表达与临床病理特征的关系。方法:采用实时荧光定量PCR（qRT-PCR）检测30例结肠腺瘤组织和55例结肠癌及其癌旁组织中miR-520a的表达,分析结肠癌中miR-520a的表达与临床病理特征之间的关系。结果:miR-520a在结肠癌组织中的表达明显低于结肠腺瘤,而结肠腺瘤中的表达明显低于癌旁组织（P＜0.05）。在结肠癌中,miR-520a的表达与肿瘤分化程度、淋巴转移、TNM分期、远处转移均显著相关（P＜0.05）。结论:miR-520a在结肠癌中低表达,提示其可能发挥抑癌基因的功能。     

miR-155和TGFβR2在结肠癌中的表达及临床意义

目的:探讨结肠癌组织中微小RNA-155（miR-155）与转化生长因子β受体Ⅱ（TGFβR2）的表达及其临床意义。方法:选取接受手术治疗的97例结肠癌患者为研究对象,将癌组织及其癌旁组织标本分别作为结肠癌组、正常组。采用qRT-PCR法检测两组miR-155与TGFβR2 mRNA相对表达量,免疫组化法检测组织中TGFβR2蛋白表达。根据miR-155检测结果的平均值分组,高于平均值为高表达组,低于平均值为低表达组,根据免疫组化检测结果将TGFβR2分为阳性表达组与阴性表达组,观察其与患者临床病理参数的关系。采用Pearson法分析miR-155与TGFβR2的相关性;Kaplan-Meier对结肠癌患者3年的生存情况进行分析。结果:与正常组相比,结肠癌组miR-155表达水平显著升高（P＜0.05）,而TGFβR2 mRNA及蛋白表达显著降低（P＜0.05）;miR-155、TGFβR2表达均与淋巴结转移、临床分期、组织分化程度、浸润深度显著相关（P＜0.05）;miR-155与TGFβR2呈显著负相关（P＜0.05）;miR-155低表达组PFS、OS均显著高于高表达组（P＜0.05）,TGFβR2阳性表达组PFS、OS均显著高于阴性表达组（P＜0.05）。结论:结肠癌组织中高表达的miR-155与低表达的TGFβR2均可作为预测癌症进展情况的有效指标,二者呈负相关且异常表达均与患者预后不良密切相关。     

结肠癌患者手术前后血浆miR-21表达水平变化及其临床意义

目的 探讨结肠癌患者手术前后血浆miR-21表达水平变化及其临床意义。方法 实时荧光定量聚合酶链反应法（real-time quantitative PCR, qRT-PCR）检测结肠癌患者与健康对照组血浆中miR-21 的表达情况,以及与临床病理参数的关系;另外检测结肠癌患者手术前一周、手术后一周和术后一月血浆中miR-21的表达水平变化。 结果 40例结肠癌患者手术前血浆中miR-21表达水平较对照组差异具有统计学意义（P<0.05）;并与肿瘤的分化程度、临床分期、淋巴结转移及远处转移有关（P <0.05）,而与年龄和性别无相关性（P>0.05）;与术前相比,术后一周和一月血浆中miR-21的表达明显降低,差异有统计学意义（P<0.05）。 结论 结肠癌患者血浆中miR-21的表达情况,可作为结肠癌潜在的生物标志物,有望成为一种新的有效辅助诊断结肠癌及判断预后的方法。     

Long Non-Coding RNA lincRNA-ROR Promotes the Progression of Colon Cancer and Holds Prognostic Value by Associating with miR-145

Large intergenic non-coding RNA ribonucleic acids-ROR (lincRNA-ROR) has been reported to exert impacts on the maintenance of induced pluripotent stem cells and embryonic stem cells, and play important roles in human hepatocellular cancer. It contributes to tumorigenesis and metastasis and functions as a competing endogenous RNA (ceRNA) by sponging miR-145 in breast cancer. However, its clinical significance and prognostic value in colon cancer remain unknown. The aim of the present study was to clarify the clinicopathological role and prognostic value of lincRNA-ROR and miR-145 in colon cancer. In the present study, qRT-PCR was performed to measure the expression levels of lincRNA-ROR in colon cancer tissues and cell lines. Then, the clinicopathological significance and prognostic value of lincRNA-ROR were analyzed. LincRNA-ROR expression correlated with pT stage, pN stage, AJCC stage and vascular invasion. Knockdown of lincRNA-ROR restored the expression of miR-145, and had a significant influence on colon cancer cell proliferation, migration and invasion. Patients of the high lincRNA-ROR/low miR-145 group had significantly poorer outcomes than those of the low lincRNA-ROR/high miR-145 group. Taken together, Overexpression of lincRNA-ROR combined with depletion of miR-145 may exert crucial impact on colon cancer prognosis evaluation and treatment.     

结核分枝杆菌感染的肺癌患者血清中lncRNA CCAT2、miR-20a的表达及其临床意义

目的:检测结核分枝杆菌（MTB）感染肺癌患者血清结肠癌相关转录因子2（lncRNA CCAT2）、miR-20a的表达,分析其临床意义。方法:选取2013年6月至2015年1月本院收治的肺癌患者104例为研究对象,其中MTB感染患者54例,未感染患者50例,同期选取本院健康体检者55例为对照组;实时荧光定量PCR（qRT-PCR）检测所有受试者血清lncRNA CCAT2、miR-20a表达水平;并对所有肺癌患者进行5年内随访,记录患者生存状态;Kaplan-Meier生存曲线分析lncRNA CCAT2、miR-20a与MTB感染肺癌患者及非MTB感染肺癌患者预后的关系;COX回归分析肺癌患者预后的危险因素。结果:与对照组比较,肺癌患者血清lncRNA CCAT2、miR-20a表达水平均显著升高（P＜0.05）,与非MTB感染肺癌患者比较,MTB感染患者lncRNA CCAT2、miR-20a表达水平均显著升高（P＜0.05）;肺癌患者血清lncRNA CCAT2和miR-20a表达与患者MTB感染、临床分期及组织分级有关;多因素COX分析表明,MTB感染、临床分期、组织分级、血清lncRNA CCAT2、miR-20a表达水平是影响肺癌患者预后的危险因素（P＜0.05）;对肺癌患者出院后随访,MTB感染患者和非MTB感染患者lncRNA CCAT2高表达组5年内生存率（12.9%、17.9%）均低于低表达组（21.7%、36.4%）,miR-20a高表达组5年内生存率（13.8%、18.5%）均低于低表达组（20.0%、34.8%）,MTB感染肺癌患者累积生存率（16.7%）低于非MTB感染肺癌患者（26.0%）。结论:lncRNA CCAT2、miR-20a可能参与MTB感染肺癌患者的预后,可能是MTB感染肺癌患者预后的生物标志物。     

结直肠癌中医辨证分型与miR-29、miR-34a表达的相关性分析

目的:探究结直肠癌患者血清miR-29、miR-34a表达水平及其与中医辨证分型的相关性。方法:选取2014年06月至2015年06月本院收治的127例结直肠癌患者作为研究对象（结直肠癌组）,并根据中医辨证分型标准分为湿热内蕴型21例、气滞血瘀型40例、脾肾阳虚型29例、气血两虚型18例、肝肾阴虚型19例;另选取同期在本院体检的127例健康者作为健康对照组。采用实时荧光定量PCR（qRT-PCR）技术检测血清miR-29、miR-34a表达水平,并进行比较;采用Pearson法分析血清miR-29与miR-34a表达水平的相关性;采用Logistic回归模型分析影响结直肠癌患者不良预后发生的危险因素。结果:结直肠癌组患者血清miR-29、miR-34a表达水平均明显低于健康对照组（P＜0.05）。低分化、浸润程度T3-T4、TNM分期Ⅲ-Ⅳ期、淋巴结转移、远处转移患者血清miR-29、miR-34a表达水平明显低于高中分化、浸润程度T1-T2、TNM分期Ⅰ-Ⅱ期、无淋巴结转移、无远处转移患者（P＜0.05）。结直肠癌患者血清miR-29与miR-34a表达水平呈正相关（r=0.529,P=0.000）。低分化、浸润程度T3-T4、TNM分期Ⅲ-Ⅳ期、淋巴结转移、低miR-29水平、低miR-34a水平是影响结直肠癌患者不良预后发生的危险因素（P＜0.05）。脾肾阳虚型、气滞血瘀型、湿热内蕴型预后不良患者比例依次明显增加（P＜0.05）。肝肾阴虚型、气血两虚型、脾肾阳虚型、气滞血瘀型、湿热内蕴型结直肠癌患者血清miR-34a表达水平依次显著降低（P＜0.05）,miR-29表达水平差异无统计学意义（P＞0.05）。结论:结直肠癌患者血清中miR-29、miR-34a低表达,与肿瘤分期升高、分化程度降低、浸润程度增加、淋巴结转移、远处转移、不良预后等密切相关,且miR-34a对结直肠癌不同中医辨证分型有一定的分型参考意义。