miR-15a-5p和miR-16-5p在骨肉瘤组织中的表达分析

目的:使用microRNAs基因芯片及实时定量PCR法测定骨肉瘤组织中miR-15a-5p和miR-16-5p的相对表达含量,并与瘤旁组织对比,分析骨肉瘤细胞内miR-15a-5p和miR-16-5p的表达变化。方法:选取34例骨肉瘤组织蜡块样本,使用microRNAs基因芯片观察miR-15a-5p和miR-16-5p在骨肉瘤和瘤旁组织内的表达差异;实时定量PCR法测定骨肉瘤组织和瘤旁组织中miR-15a-5p和miR-16-5p的相对表达含量,并将两种结果对比分析。结果:microRNAs基因芯片结果显示,在骨肉瘤组织中,miR-15a-5p在肿瘤中的表达较瘤旁组织低1.79倍,miR-16-5p较瘤旁组织低1.62倍。实时定量PCR实验结果表明,miR-15a-5p和miR-16-5p表达较瘤旁组织降低,差异有统计学意义(P0.05)。经过统计学计算,miR-15a-5p在肿瘤中的表达较瘤旁组织低3.14倍,miR-16-5p较瘤旁组织低5.65倍。结论:在骨肉瘤中,miR-15a-5p和miR-16-5p表达含量降低,提示这两种microRNAs在骨肉瘤中可能做为抑癌因子存在。     

miR-324-5p、miR-605-3p在脑胶质瘤组织的表达及与临床病理参数和预后的关系

摘要 目的：探讨微小核糖核酸（miRNA）-324-5p、miR-605-3p在脑胶质瘤组织的表达及与临床病理参数和预后的关系。方法：选取2018年1月～2019年12月徐州医科大学附属医院收治的90例脑胶质瘤患者。收集术中部分瘤组织和瘤旁组织,采用实时荧光定量聚合酶链式反应（qRT-PCR）检测miR-324-5p、miR-605-3p表达。根据脑胶质瘤组织中miR-324-5p、miR-605-3p表达的平均值分为高表达组和低表达组,采用Kaplan-Meier法分析不同miR-324-5p、miR-605-3p表达脑胶质瘤患者生存情况,采用多因素Cox回归分析脑胶质瘤患者预后的影响因素。结果：与瘤旁组织比较,脑胶质瘤组织中miR-324-5p、miR-605-3p表达降低（P＜0.05）。不同分化程度、淋巴结转移、世界卫生组织（WHO）中枢神经系统肿瘤分类的脑胶质瘤患者miR-324-5p、miR-605-3p表达比较有差异（P＜0.05）。90例脑胶质瘤患者3年总生存率为36.67%（33/90）。Kaplan-Meier生存曲线分析显示,miR-324-5p高表达组、miR-605-3p高表达组总生存率高于miR-324-5p低表达组、miR-605-3p低表达组（P＜0.05）。多因素Cox回归分析显示,低分化、淋巴结转移和WHO中枢神经系统肿瘤分类Ⅲ～Ⅳ级为脑胶质瘤患者死亡的独立危险因素,miR-324-5p和miR-605-3p升高为独立保护因素（P＜0.05）。结论：脑胶质瘤组织中miR-324-5p、miR-605-3p呈低表达,与分化程度、淋巴结转移、WHO中枢神经系统肿瘤分类有关,miR-324-5p、miR-605-3p低表达还可导致不良预后。     

上皮性卵巢癌组织miR-338-3p、miR-1294的表达及临床意义

摘要 目的：探讨上皮性卵巢癌组织中微小RNA（miR）-338-3p、miR-1294表达与患者临床病理参数的关系,并分析其表达对上皮性卵巢癌预后的影响。方法：收集2010年6月～2015年6月我院行手术治疗的上皮性卵巢癌患者的石蜡组织样本（癌组织和癌旁正常组织）,实时荧光定量PCR（RT-PCR）技术检测组织样本中miR-338-3p、miR-1294的表达情况;分析癌组织中miR-338-3p、miR-1294表达与患者临床病理参数的关系;Kaplan-Meier生存曲线分析miR-338-3p、miR-1294表达与患者预后的关系;Cox回归模型分析上皮性卵巢癌患者的预后影响因素。结果：与癌旁正常组织相比,上皮性卵巢癌组织中miR-338-3p、miR-1294表达均降低（均P<0.05）;miR-338-3p表达与组织学分级、淋巴结转移、FIGO分期相关（均P<0.05）;miR-1294表达与肿瘤直径、淋巴结转移、FIGO分期相关（均P<0.05）。Kaplan-Meier生存曲线结果显示,miR-338-3p低表达组患者、miR-1294低表达组患者的预后较差（均P<0.05）。Cox回归模型分析结果显示,淋巴结转移、较高FIGO分期、miR-338-3p低表达、miR-1294低表达是上皮性卵巢癌预后的危险因素（均P<0.05）。结论：上皮性卵巢癌组织中miR-338-3p、miR-1294均低表达,且均与较差临床病理参数、预后不良相关;miR-338-3p、miR-1294可能是上皮性卵巢癌患者预后预测的潜在指标。     

miR-142-3p is a tumor suppressor that inhibits estrogen receptor expression in ER-positive breast cancer

Estrogen receptors (ERs) are involved in the development of many types of malignant tumors, in particular, breast cancer. Among others, ERs affect cell growth, proliferation, and differentiation. The microRNA (miRNA) miR-142-3p has been shown to inhibit carcinogenesis by regulating various cellular processes, including cell cycle progression, cell migration, apoptosis, and invasion. It does so via targeting molecules involved in a range of signaling pathways. We surgically collected 20 ER-positive breast cancer samples, each with matched adjacent normal breast tissue, and measured the expression of miR-142-3p via quantitative real-time polymerase chain reaction (qRT-PCR). Bioinformatics methods, luciferase reporter assay, qRT-PCR, and western blot analysis were used to assess whether miR-142-3p could target ESR1, which encodes the estrogen receptor, in ER-positive breast cancer cells and patient samples. We also restored miRNA expression and performed cell viability, cytotoxicity, and colony formation assays. Western blot analysis and qRT-PCR were used to study the expression of apoptosis and stemness markers. We found that miR-142-3p is downregulated in ER-positive breast cancers. Restoration of miR-142-3p expression in ER-positive breast cancer cells reduced cell viability, induced apoptosis via the intrinsic pathway and decreased both colony formation and the expression of stem cell markers. Bioinformatic analysis predicted miR-142-3p could bind to 3′-untranslated region ESR1 messenger RNA (mRNA). Consistently, we demonstrated that miR-142-3p reduced luciferase activity in ER-positive breast cancer cells, and decreased ESR1 expression in both mRNA and protein levels. The results revealed miR-142-3p and ESR1 expression correlated negatively in ER-positive breast cancer samples. The results suggest miR-142-3p acts as a tumor suppressor via multiple mechanisms. Thus, restoration of miR-142-3p expression, for example, via miRNA replacement therapy, may represent an effective strategy for the treatment of ER-positive breast cancer patients.     

HOXC13-AS promotes breast cancer cell growth through regulating miR-497-5p/PTEN axis

Dysregulated long noncoding RNAs (lncRNAs) remains to be explored in tumorigenesis. LncRNA HOXC13 antisense RNA (HOXC13-AS) has been found as an oncogene in many cancers; however, the role of HOXC13-AS in breast cancer still elusive. In this study, the HOXC13-AS levels and its role in cell proliferation was first measured by real-time quantitative polymerase chain reaction, Cell Counting Kit-8 assay, and colony formation assay. It showed that HOXC13-AS was increased in breast cancer tissues compared with the adjacent normal tissues and upregulated HOXC13-AS promoted the growth of breast cancer cells. Then, we found that the miR-497-5p levels were downregulated in cancer tissues compared with the adjacent tissues and miR-497-5p suppressed breast cancer cell proliferation. Further study showed that HOXC13-AS could function as a “sponge” for miR-497-5p then suppress miR-497-5p expression. Moreover, we next identified that Phosphatase and Tensin homolog (PTEN) is the target of miR-497-5p. Overexpression of miR-497-5p by chemical mimics decreased the expression of PTEN, while downregulation of miR-497-5p by HOXC13-AS rescued the expression of PTEN. Finally, we showed that HOXC13-AS promoted the proliferation of breast cancer cells and tumor growth through miR-497-5p/PTEN axis in vitro and in vivo. Hence, we conclude that HOXC13-AS, which is significantly upregulated in breast cancers, promoted cell proliferation through the suppressed miR-497-5p and further upregulated PTEN.     

基于生物信息学分析研究miR-182-5p通过靶向调控EP300促进乳腺癌细胞的侵袭和转移

近期研究表明,miR-182-5p对多种癌症的侵袭和转移具有重要作用,但其在乳腺癌侵袭转移中的研究相对较少。本研究通过网上在线microRNA分析工具下载乳腺癌组织及正常乳腺组织表达比较的数据集,分析发现在GSE4589、GSE38167、GSE61438等3个数据库中,在乳腺癌组织中存在26个相同的microRNA,其中8个上调,而我们实验验证发现hsa-miR-182在8例病理组织中的表达上调差异最显著(P=0.001),选定目的基因hsa-miR-182;qRT-PCR检测细胞中miR-182-5p的表达,结果显示,与MCF-10A相比,miR-182-5p在MDA-MB-231、T47D、MDA-MB-453、MCF-7中表达上调(P<0.05);转染miR-182-5p干扰质粒,qRT-PCR检测细胞中miR-182-5p的表达情况。结果显示,miR-182-5p表达显著降低(P=0.003),提示转染成功;Transwell侵袭结果显示,MDAMB-231细胞敲低miR-182-5p,与对照组相比,体外侵袭能力明显降低(P=0.002);Western印迹检测转染miR-182-5p干扰质粒时,MDA-MB-231中上皮-间质转化(epithelial-mesenchymal transition,EMT)相关标志物的表达情况,结果显示,与对照组相比,敲低miR-182-5p使细胞中上皮-钙黏着蛋白(E-cadherin)表达上调,神经-钙黏着蛋白(N-cadherin)、波形蛋白(vimentin)表达下调。为研究探讨miR-182-5p的靶蛋白,采用在线预测软件预测可能与miR-182-5p结合的靶蛋白,cytoscape构建蛋白质互作网络图并筛选出hub基因;双荧光素酶结果证实,miR-182-5p可与EP300靶向结合(P=0.001);采用qRT-PCR、Western印迹检测转染miR-182-5p干扰质粒后EP300在mRNA及蛋白质水平的表达,结果显示,与对照组相比,在敲低miR-182-5p组中EP300在mRNA及蛋白质的表达上调(P=0.001)。综上所述,miR-182-5p可靶向调节EP300,促进乳腺癌细胞的侵袭与转移。     

MicroRNA miR-21 overexpression in human breast cancer is associated with advanced clinical stage, lymph node metastasis and patient poor prognosis

To investigate the global expression profile of miRNAs in primary breast cancer (BC) and normal adjacent tumor tissues (NATs) and its potential relevance to clinicopathological characteristics and patient survival, the genome-wide expression profiling of miRNAs in BC was investigated using a microarray containing 435 mature human miRNA oligonucleotide probes. Nine miRNAs of hsa-miR-21, hsa-miR-365, hsa-miR-181b, hsa-let-7f, hsa-miR-155, hsa-miR-29b, hsa-miR-181d, hsa-miR-98, and hsa-miR-29c were observed to be up-regulated greater than twofold in BC compared with NAT, whereas seven miRNAs of hsa-miR-497, hsa-miR-31, hsa-miR-355, hsa-miR-320, rno-mir-140, hsa-miR-127 and hsa-miR-30a-3p were observed to be down-regulated greater than twofold. The most significantly up-regulated miRNAs, hsa-mir-21 (miR-21), was quantitatively analyzed by TaqMan real-time PCR in 113 BC tumors. Interestingly, among the 113 BC cases, high level expression of miR-21 was significantly correlated with advanced clinical stage (P = 0.006, Fisher's exact text), lymph node metastasis (P = 0.007, Fisher's exact text), and shortened survival of the patients (hazard ratio [HR]=5.476, P < 0.001). Multivariate Cox regression analysis revealed this prognostic impact (HR=4.133, P = 0.001) to be independent of disease stage (HR=2.226, P = 0.013) and histological grade (HR=3.681, P = 0.033). This study could identify the differentiated miRNAs expression profile in BC and reveal that miR-21 overexpression was correlated with specific breast cancer biopathologic features, such as advanced tumor stage, lymph node metastasis, and poor survival of the patients, indicating that miR-21 may serve as a molecular prognostic marker for BC and disease progression.     

MORC4 is a novel breast cancer oncogene regulated by miR-193b-3p

A better understanding of breast cancer pathogenesis would contribute to improved diagnosis and therapy and potentially decreased mortality rates. Here, we found that the MORC family CW-type zinc finger 4 (MORC4) overexpression in breast cancer tissues is associated with poor survival, and the short-interfering RNA knockdown of MORC4 suppresses the growth of breast cancer cells by promoting apoptosis. To investigate the mechanisms associated with MORC4 upregulation, microRNAs potentially targeting MORC4 were analyzed, with miR-193b-3p identified as the regulator and a negative correlation between miR-193b-3p and MORC4 expression determined in both breast cancer cell lines and tissues. Further analysis verified that MORC4 silencing did not affect miR-193b-3p expression, although altered miR-193b-3p expression attenuated MORC4 protein levels. Moreover, dual-luciferase reporter assays verified miR-193b-3p binding to the 3′ untranslated region of MORC4. Furthermore, restoration of miR-193b-3p expression in breast cancer cells led to decreased growth and activation of apoptosis, which was consistent with results associated with MORC4 silencing in breast cancer cells. These results identified MORC4 as differentially expressed in breast cancer cells and tissues and its downregulation by miR-193b-3p, as well as its roles in regulating the growth of breast cancer cells via regulation of apoptosis. Our findings offer novel insights into potential mechanisms associated with breast cancer pathogenesis.     

miR-135b promotes proliferation and metastasis by targeting APC in triple-negative breast cancer

Triple-negative breast cancer (TNBC) is the most aggressive breast cancer subtype. The aim of our study was to investigate the functional role of microRNA-135b (miR-135b) in TNBC. A real-time polymerase chain reaction assay was used to quantify miR-135b expression levels in 90 paired TNBC tissue and adjacent normal tissue samples. Wound-healing and transwell assays were performed to evaluate the effects of miR-135b expression on the migration and invasion of TNBC cells. Luciferase reporter and western blot analyses were used to verify whether the mRNA encoding APC is a major target of miR-135b. In the current study, we found that miR-135b was highly expressed in TNBC tissue and cells, and the expression levels were correlated with lymph node status and TNM stage. In TNBC cells, the ectopic expression of miR-135b promoted cell proliferation and invasion in vitro. In addition, our study proved that the overexpression of miR-135b significantly suppressed APC expression by targeting the 3′-untranslated region of APC, whereas enhanced APC expression could partially abrogate the miR-135b-mediated promotion of carcinogenic traits in TNBC cells. Taken together, our study demonstrated that miR-135b expression promoted the proliferation and invasion of TNBC by downregulating APC expression, indicating that miR-135b may serve as a promising target for the treatment of TNBC patients.     

miR-139-5p is a regulator of metastatic pathways in breast cancer

Metastasis is a complex, multistep process involved in the progression of cancer from a localized primary tissue to distant sites, often characteristic of the more aggressive forms of this disease. Despite being studied in great detail in recent years, the mechanisms that govern this process remain poorly understood. In this study, we identify a novel role for miR-139-5p in the inhibition of breast cancer progression. We highlight its clinical relevance by reviewing miR-139-5p expression across a wide variety of breast cancer subtypes using in-house generated and online data sets to show that it is most frequently lost in invasive tumors. A biotin pull-down approach was then used to identify the mRNA targets of miR-139-5p in the breast cancer cell line MCF7. Functional enrichment analysis of the pulled-down targets showed significant enrichment of genes in pathways previously implicated in breast cancer metastasis (P < 0.05). Further bioinformatic analysis revealed a predicted disruption to the TGFβ, Wnt, Rho, and MAPK/PI3K signaling cascades, implying a potential role for miR-139-5p in regulating the ability of cells to invade and migrate. To corroborate this finding, using the MDA-MB-231 breast cancer cell line, we show that overexpression of miR-139-5p results in suppression of these cellular phenotypes. Furthermore, we validate the interaction between miR-139-5p and predicted targets involved in these pathways. Collectively, these results suggest a significant functional role for miR-139-5p in breast cancer cell motility and invasion and its potential to be used as a prognostic marker for the aggressive forms of breast cancer.     

miR-145-5p affects the differentiation of gastric cancer by targeting KLF5 directly

Krüppel-like factor 5 (KLF5) takes part in the pathologic processes of many types of cancer; however, its expression and roles in the biological behavior of gastric cancer remain unknown. TargetScan suggested that miR-145-5p is the predicted effective and conserved microRNA (miRNA) that binds to KLF5 through its 3′-untranslated region (UTR). We investigated the expression of KLF5 and miR-145-5p messenger RNA (mRNA) in gastric cancer and then analyzed its role in the biological behavior of gastric cancer cells. Our results indicated that KLF5 expression was detected by immunohistochemistry in 39.7% of the gastric cancer cases and was increased compared with that of the corresponding noncancerous normal mucosa (0.01 < p < 0.05). The poorly differentiated subtype showed positive KLF5 expression, whereas the differentiated subtype showed negative KLF5 expression (p < 0.05). Dual-luciferase reporter assay suggested KLF5 3′-UTR was the direct target of miR-145-5p. Compared with the differentiated gastric cancer, miR-145-5p was downregulated in undifferentiated gastric cancer (p < 0.05). The downregulation of KLF5 expression and differentiation of MGC-803 and BGC-823 caused by siKLF5 or miR-145-5p mimic transfection. Our results indicated that miR-145-5p/KLF5 3′-UTR affected the differentiation of gastric cancer. miR-145-5p was able to promote gastric cancer differentiation by targeting KLF5 3′-UTR directly. Our data suggest a novel mechanism for cancer differentiation and a new facet to the role of miR-145-5p/KLF5 in gastric cancer.     

肝癌组织中miR-338-3p的表达及与临床病理参数的关系

目的:探讨肝癌组织中微小RNA-338-3p(miR-338-3p)的表达及与临床病理参数的关系。方法:选取2015年1月至2016年6月我院手术获得的67例肝癌组织标本,同时每例标本均取癌旁正常组织标本作为配对对照,采用实时定量逆转录聚合酶链反应(RT-qPCR)对两组组织标本中的miR-338-3p进行检测,并分析其与肝癌临床病理特征的关系。结果:45例(67.16%)miR-338-3p表达下调,22例(32.85%)表达上调;RT-qPCR结果显示,肝癌组织中miR-338-3p的相对含量为(0.76±0.38),低于癌旁正常组织中的(1.23±0.45),差异有统计学意义(t=-6.259,P=0.000)。miR-338-3p在低分化、TNM分期Ⅲ+Ⅳ期、肿瘤浸润深度T3+T4期、有淋巴结转移肝癌患者肝癌组织中的表达下调率高于中高分化、Ⅰ+Ⅱ期、T1+T2期、无淋巴结转移肝癌患者,差异有统计学意义(P0.05)。不同性别、年龄、病理类型、肿瘤大小肝癌患者肝癌组织中miR-338-3p表达下调率差异无统计学意义(P0.05)。结论:miR-338-3P在肝癌组织中呈低表达水平,与分化程度、TNM分期、肿瘤浸润深度、淋巴结转移有关,可能参与了肝癌的发生发展过程,早期检测可作为评估肝癌病情的指标。     

细胞周期蛋白依赖性激酶在miR-193a5p调控卵巢癌细胞增殖及上皮细胞间充质转变中的作用*

目的: 探讨miR-193a-5p靶向CDK14并调控卵巢癌细胞OVAC的增殖和上皮间充质转变(EMT)的作用。方法: 通过TargetScanHuman分析miR-193a-5p与CDK14的匹配情况,通过荧光素酶报告系统检测miR-193a-5p靶向CDK14情况;在miR-193a-5p mimics过表达或者miR-193a-5p inhibitor基因沉默miR-193a-5p的情况下,采用免疫印迹检测CDK14,EMT相关蛋白质E-cadherin、vimentin、fibronectin和N-cadherin的表达量,采用CCK-8检测卵巢癌细胞OVAC增殖情况, MMT检测卵巢癌细胞OVAC的细胞活力。结果: miR-193a-5p靶向CDK14的3‘UTR;过表达miR-193a-5后, CDK14的表达下降,EMT相关蛋白质E-cadherin的表达上升,vimentin、fibronectin和N-cadherin的表达下降,卵巢癌细胞OVAC的增殖和细胞活力均增加;同时,基因沉默miR-193a-5p后, CDK14的表达上升,EMT相关蛋白质E-cadherin的表达下降,vimentin、fibronectin和N-cadherin的表达量上升,卵巢癌细胞OVAC的增殖和细胞活力均减少。结论: miR-193a-5p通过靶向CDK14的3‘UTR降低卵巢癌细胞OVAC的增殖、细胞活力和EMT。     

Long intergenic noncoding RNA 00641 inhibits breast cancer cell proliferation,migration, and invasion by sponging miR-194-5p

Long noncoding RNAs have an essential role in the tumorigenesis of breast cancer (BC). Nonetheless, the consequences of long intergenic noncoding RNA 00641 (LINC00641) in BC remain unidentified. This study shows that LINC00641 expression level was decreased in BC tissues. LINC00641 expression level was negatively related to tumor size, lymph-node metastasis, as well as clinical stage. LINC00641 overexpression inhibited cell proliferation, migration, and invasion but stimulated apoptosis in BC cells. LINC00641 overexpression also remarkably reduced BC growth and metastasis in vivo. LINC00641 acts as a competitive endogenous RNA to sponge miR-194-5p. miR-194-5p level was higher in BC tissues and cells compared with normal-adjacent tissues and normal breast epithelial cell. miR-194-5p expression was negatively correlated with LINC00641 expression in BC tissues. miR-194-5p overexpression reversed the effects of LINC00641 on cell proliferation, cycle, apoptosis, migration, as well as invasion. In conclusion, LINC00641 inhibits BC cell proliferation, migration, as well as invasion by sponging miR-194-5p.     

MicroRNA-490-5p inhibits proliferation of bladder cancer by targeting c-Fos

MicroRNAs (miRNAs) are non-protein-coding sequences that play a crucial role in tumorigenesis by negatively regulating gene expression. Here, we found that miR-490-5p is down-regulated in human bladder cancer tissue and cell lines compared to normal adjacent tissue and a non-malignant cell line. To better characterize the function of miR-490-5p in bladder cancer, we over-expressed miR-490-5p in bladder cancer cell lines with chemically synthesized mimics. Enforced expression of miR-490-5p in bladder cancer cells significantly inhibited the cell proliferation via G1-phase arrest. Further studies found the decreased c-Fos expression at both mRNA and protein levels and Luciferase reporter assays demonstrated that c-Fos is a direct target of miR-490-5p in bladder cancer. These findings indicate miR-490-5p to be a novel tumor suppressor of bladder cancer cell proliferation through targeting c-Fos.     

miR-139-5p在前列腺癌患者外周血中的表达及临床意义

目的:研究miR-139-5p在前列腺癌患者外周血中的表达及临床意义。方法:收集2015年4月至2016年9月于我院进行诊治的65例前列腺疾病患者和20例男性健康志愿者外周血样本,使用RT-q PCR方法检测各组miR-139-5相对表达量,统计分析前列腺癌患者外周血miR-139-5p水平与临床特征相关性,使用ROC曲线分析外周血miR-139-5p诊断前列腺癌的临床价值。结果:与良性增生组(n=15)患者和对照组(n=20)健康志愿者相比,前列腺癌组(n=50)患者外周血中miR-139-5p相对表达量均显著升高(P均0.05)。中高分化、转移癌、Gleason评分高危前列腺癌患者外周血miR-139-5p相对表达量显著高于低分化、原位癌和Gleason评分中危的前列腺癌患者(P均0.05)。外周血miR-139-5p在区分前列腺癌和良性前列腺增生或健康人中特异性和敏感性均较高,ROC曲线下面积为0.942(95%CI:0.0.785~0.971)。结论:miR-139-5p在50例前列腺癌患者外周血中呈高表达,或可作为非侵入性前列腺癌诊断标志物。     

Downregulation of circDYNC1H1 exhibits inhibitor effect on cell proliferation and migration in hepatocellular carcinoma through miR-140-5p

Circular RNAs have been found to be aberrantly expressed in tumors and their significance in tumorigenesis has been focused on. The role of circDYNC1H1 in hepatocellular carcinoma (HCC) pathogenesis and its relationship with miR-140-5p were explored. The expression of circDYNC1H1, miR-140-5p, and SULT2B1 in HCC tissues and cells was measured, and Pearson's analysis was used to analyze their expression correlation. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and Transwell assays were performed to determine cell proliferation and migration. Binding between circDYNC1H1 and miR-140-5p was evaluated with RNA pull-down assay. A luciferase reporter assay was conducted to assess the interaction between circDYNC1H1 and miR-140-5p and between miR-140-5p and SULT2B1. circDYNC1H1 was highly expressed in HCC tissues (n = 20), and it was negatively associated with the expression of miR-140-5p but positively correlated with SULT2B1 messenger RNA expression. circDYNC1H1 was upregulated in cell lines of HCC. Interference of circDYNC1H1 suppressed cell proliferation and migration of HCC. circDYNC1H1 acted as a sponge of miR-140-5p. miR-140-5p controlled SULT2B1 expression by targeting its 3′-untranslated region. circDYNC1H1 enhanced SULT2B1 expression via sponging miR-140-5p. Downregulation of circDYNC1H1 disturbed cell proliferation and migration of HCC through miR-140-5p/SULT2B1 pathway. Silencing of circDYNC1H1 delayed tumor growth in HCC mouse model. Acting like a sponge of miR-140-5p, silenced circDYNC1H1 downregulated SULT2B1 to restrain HCC cell proliferation and migration, which is adverse to HCC growth and progression.     

miR-193b-5p regulates chondrocytes metabolism by directly targeting histone deacetylase 7 in interleukin-1β-induced osteoarthritis

There is increasing evidence regarding the pivotal roles of microRNAs (miRNAs) and histone deacetylases (HDACs) in the development of osteoarthritis (OA). This study aimed to determine whether miR-193b-5p regulates HDAC7 expression directly to affect cartilage degeneration. Expression levels of miR-193b-5p, HDAC7, matrix metalloproteinase 3 (MMP3), and MMP13 were determined in normal and OA cartilage and primary human chondrocytes (PHCs) stimulated with interleukin-1β (IL-1β). PHCs were transfected with a miR-193b-5p mimic or inhibitor to verify whether miR-193b-5p influences the expression of HDAC7 and MMPs. A luciferase reporter assay was performed to demonstrate the binding between miR-193b-5p and the 3′-untranslated region (UTR) of HDAC7. Expression of miR-193b-5p was reduced in IL-1β-stimulated PHCs and in OA cartilage compared to that in normal cartilage. Luciferase reporter assay exhibited the repressed activity of the reporter construct containing the 3′UTR of HDAC7. Both miR-193b-5p overexpression and HDAC7 inhibition decreased the expression of MMP3 and MMP13, whereas the inhibition of miR-193b-5p enhanced HDAC7, MMP3, and MMP13 expression. miR-193b-5p downregulates HDAC7 directly and, as a result, inhibits MMP3 and MMP13 expression, which suggests that miR-193b-5p has a protective role in OA.