circNEIL3靶向miR-218-5p对口腔鳞状细胞癌细胞增殖、凋亡、迁移、侵袭的影响

该文旨在探讨circNEIL3对口腔鳞癌细胞生物学行为的影响及其可能的作用机制。采用qRT-PCR法检测口腔鳞癌组织、癌旁组织、人口腔鳞癌细胞(CAL-27、SCC-25、SCC-9、HSC-3)以及正常口腔角质细胞HOK中circNEIL3、miR-218-5p的表达量;以CAL-27细胞为研究对象,si-circNEIL3、miR-218-5p mimics、si-NC、miR-NC分别转染至CAL-27细胞, si-circNEIL3和antimiR-NC、si-circNEIL3和anti-miR-218-5p分别共转染至CAL-27细胞; MTT法检测CAL-27细胞增殖情况;流式细胞术检测CAL-27细胞凋亡情况; Transwell检测CAL-27细胞侵袭和迁移情况。双荧光素酶报告实验检测circNEIL3与miR-218-5p的靶向关系; Western blot检测Bax、Bcl-2、caspase-3、cleaved-caspase-3蛋白表达量。与癌旁组织相比,口腔鳞癌组织中circNEIL3的表达量升高(P<0.01),miR-218-5p的表达量降低(P...     

LncRNA MIR4435-2HG调控miR-138-5p/HMGA1轴对胃癌细胞的增殖、侵袭和迁移的影响

目的 探讨LncRNA MIR4435-2HG对胃癌细胞增殖、侵袭和迁移的影响及作用机制.方法 培养正常人胃黏膜上皮细胞GES-1和胃癌细胞系AGS、SGC7901、BGC823和BGC803,AGS细胞分为对照组(正常培养细胞)、si-con组(转染乱序无意义阴性序列)、si-MIR4435-2HG组(转染MIR44...     

miR-670-5p对肺癌细胞增殖、迁移、侵袭的影响

目的: 探讨miR-670-5p对肺癌细胞增殖、迁移和侵袭的影响,分析其调控WW结构域氧化还原酶基因(WWOX)的机制。方法: 收集2016年1月至2017年10月收治的28例肺癌组织和对应癌旁组织,实时荧光定量PCR(RT-qPCR)检测肺癌组织、癌旁组织中miR-670-5p的表达水平。将肺癌细胞A549分为anti-miR-NC组(转染anti-miR-NC)、anti-miR-670-5p组(转染anti-miR-670-5p)、anti-miR-670-5p+si-NC组(转染anti-miR-670-5p与si-NC)、anti-miR-670-5p+si-WWOX组(转染anti-miR-670-5p与si-WWOX)。转染48 h后,RT-qPCR或蛋白质印记(Western blot)检测转染效果。细胞计数试剂盒(CCK-8)检测细胞活力;Transwell实验检测细胞迁移和侵袭能力;Western blot检测P21、上皮细胞钙粘蛋白(E-cadherin)和基质金属蛋白酶2(MMP-2)蛋白的表达水平。双荧光素酶报告基因实验和Western blot验证miR-670-5p和WWOX的靶向关系。结果: 肺癌组织中miR-670-5p的表达水平较癌旁组织显著升高(P＜0.05)。抑制miR-670-5p可抑制MMP-2蛋白表达(P＜0.05),促进P21和E-cadherin表达(P＜0.05),抑制A549细胞增殖、迁移和侵袭(P＜0.05)。WWOX是miR-670-5p的靶基因,miR-670-5p负调控WWOX表达。抑制WWOX可部分逆转anti-miR-670-5p对A549细胞增殖、迁移和侵袭的影响(P＜0.05)。结论: miR-670-5p通过靶向WWOX能够促进肺癌细胞增殖、迁移、侵袭。     

miR-98-5p靶向PYGO2基因对宫颈癌细胞增殖、迁移和侵袭的影响及其作用机制研究

目的探讨miR-98-5p对宫颈癌细胞增殖、迁移和侵袭的影响以及其作用机制。 方法选取2016年1月至2019年1月郴州市第一人民医院收治的宫颈癌患者的癌组织和癌旁组织;予以miR-98-5p、si-PYGO2及anti-miR-98-5p单独或共培养Siha细胞,记为：miR-NC组、miR-98-5p组、si-NC组、si-PYGO2组、anti-miR-NC组、anti-miR-98-5p组、miR-98-5p+pcDNA组、miR-98-5p+pcDNA-PYGO2组。运用qRT-PCR检测宫颈癌组织和细胞中miR-98-5p和PYGO2 mRNA的表达水平;Western blot检测蛋白表达;MTT法检测细胞增殖活性;Transwell检测细胞迁移和侵袭;将WT-PYGO2、MUT-PYGO2分别与miR-NC、miR-98-5p共转染至Siha细胞中,双荧光素酶报告基因检测实验检测荧光活性。采用方差分析和t检验进行统计学分析。 结果与癌旁组织相比,宫颈癌组织中miR-98-5p表达水平降低（0.98±0.08比0.47±0.05）,PYGO2 mRNA （1.00±0.07比2.43±0.24）和蛋白表达水平（0.27±0.03比0.62±0.05）均升高（P均< 0.001）。与正常宫颈细胞Ect1/E6E7相比,宫颈癌细胞Siha、Hela、Caski中PYGO2 mRNA （0.98±0.09比2.76±0.23、2.46±0.24、2.55±0.21）和蛋白表达水平（0.21±0.03比0.62±0.06、0.51±0.05、0.57±0.06）升高;miR-98-5p的表达水平降低（1.00±0.08比0.34±0.04、0.56±0.05、0.46±0.04） （P均< 0.05）。与miR-NC组相比,miR-98-5p组宫颈癌Siha细胞活性（48 h：0.61±0.05比0.42±0.04,72 h：1.02±0.09比0.59±0.06）、迁移数量[ （112.46±10.27）个比（48.35±4.96）个]及侵袭数量[ （92.47±9.56）个比（39.46±3.52）个]均降低（P均< 0.05）。与si-NC组相比,si-PYGO2组宫颈癌Siha细胞活性（48 h：0.64±0.06比0.46±0.05,72 h：1.05±0.08比0.67±0.06）、Siha迁移数量[ （106.48±9.75）个比（42.16±4.25）个]和侵袭数量[ （87.63±8.11）个比（35.42±6.20）个]均降低（P均< 0.05）;Cyclin D1、MMP-2、MMP-9、MMP-14表达水平降低,p21、p27表达水平升高,差异有统计学意义（P均< 0.05）。与miR-NC组比较,miR-98-5p组转染WT-PYGO2的Siha细胞荧光素酶活性（0.38±0.04比0.99±0.08）降低（P < 0.05）,转染MUT-PYGO2的Siha细胞荧光素酶活性（1.03±0.08比1.01±0.09）差异无统计学意义（P > 0.05）。PYGO2过表达逆转了miR-98-5p过表达对宫颈癌Siha细胞的增殖、迁移和侵袭的抑制作用。 结论miR-98-5p可抑制宫颈癌细胞增殖、迁移和侵袭,其机制可能与其靶向调控PYGO2的表达有关,将可为宫颈癌的预防和治疗提供新靶点。     

miR-34a-5p通过靶向醛缩酶A抑制肝癌细胞的增殖和迁移

[目的]证明醛缩酶A(ALDOA)在肝癌细胞的增殖和迁移作用并探索miR-34a-5p靶向调控ALDOA的分子机制,为肝癌治疗提供潜在的分子靶标。[方法]分子生物学技术构建了ALDOA表达质粒,蛋白质印迹(Western Blotting)和实时荧光定量PCR(RT-PCR)检测ALDOA的过表达和敲降效果,CCK-8验证细胞的增殖,划痕实验验证细胞的迁移。[结果]在肝癌细胞中过表达ALDOA能促进肝癌细胞的增殖与迁移(P <0.05),敲降ALDOA后肝癌细胞的增殖与迁移受到抑制(P <0.05),miR-34a-5p是通过靶向结合ALDOA的3’UTR抑制其表达从而抑制肝癌细胞的增殖与迁移(P <0.05)。[结论]miR-34a-5p通过靶向ALDOA抑制肝癌细胞的增殖和迁移。     

LINC00680通过靶向miR-195-5p调控IL-17诱导的肺癌细胞增殖、迁移和侵袭

该文主要讨论LINC00680靶向调控miR-195-5p对IL-17诱导的肺癌细胞增殖、迁移和侵袭的影响。将肺癌细胞H1299分为Control组、IL-17组、IL-17+si-NC组、IL-17+si-LINC00680组、IL-17+si-LINC00680+anti-miR-NC组、IL-17+si-LINC00680+anti-miR-195-5p组。采用qRT-PCR检测LINC00680和miR-195-5p的表达;克隆形成实验、MTT检测细胞增殖情况;Transwell实验检测细胞迁移和侵袭能力;Western blot检测Ki67、E-cadherin、N-cadherin蛋白表达水平;荧光素报告实验验证LINC00680和miR-195-5p靶向关系。与Control组比较,IL-17组LINC00680相对表达量、克隆细胞数、细胞活力、迁移细胞数、侵袭细胞数、Ki67和N-cadherin蛋白合成产物明显增加,E-cadherin蛋白、miR-195-5p相对表达量明显减少。与IL-17+si-NC组比较,IL-17+si-LINC00680组LINC00680...     

LncRNA MALAT1调控miR-383-5p对神经母细胞瘤细胞增殖、迁移和侵袭的影响

该文旨在探讨长链非编码RNA(lnc RNA)肺腺癌转移相关转录本1(MALAT1)对神经母细胞瘤(neuroblastoma, NB)细胞增殖、迁移和侵袭的影响及作用机制。选取2019年1月至2021年12月在凉山彝族自治州第一人民医院接受治疗的45例NB患者的NB组织和相邻的非癌组织,利用q RTPCR检测NB组织和相邻的非癌组织、人脐静脉内皮细胞HUVECs和神经母细胞瘤癌细胞系NMB、SHEP21N、SHEP2中MALAT1和miR-383-5p的表达水平。选择SHEP2为研究对象,将其随机分为si-NC组、si-MALAT1组、pc-NC组、pc-MALAT1组、mi R-NC组、mi R-383-5p过表达组(OE-mi R-383-5p组)、anti-NC组、anti-mi R-383-5p组、si-MALAT1+anti-NC组和si-MALAT1+anti-mi R-383-5p组; CCK-8法检测各组SHEP2细胞的增殖水平; Western blot实验检测各组SHEP2细胞中Cyclin D1、PCNA、MMP-2和MMP-9的蛋白表达水平; Transwel...     

IGHMBP2过表达促进食管鳞癌细胞的侵袭和迁移

IGHMBP2(Immunoglobulin mu binding protein 2)基因编码一种解旋酶,参与DNA的复制和修复,并且作为转录调节因子在基因转录中发挥重要作用。IGHMBP2基因定位于11q13.2,该染色体区段在食管鳞癌中扩增频率较高。为了探讨IGHMBP2基因在食管鳞癌中的扩增情况及其在食管鳞癌中的作用,文章对本实验室前期报道的59例食管鳞癌原发肿瘤array-CGH数据进行分析,结果显示IGHMBP2基因扩增频率为28.9%(17/59)。进一步利用荧光原位杂交(FISH)和Western blot技术,发现食管鳞癌细胞系KYSE30、KYSE180、KYSE510和KYSE150中存在IGHMBP2基因扩增/增益以及蛋白高表达。敲降IGHMBP2后,KYSE30和KYSE150细胞的侵袭迁移能力明显降低(P<0.001),侵袭迁移相关蛋白E-cadherin的表达水平升高;敲降后转染IGHMBP2质粒,回复其蛋白表达后,细胞的侵袭迁移能力又得以恢复(P<0.01)。上述结果表明,IGHMBP2过表达可能通过降低E-cadherin的表达从而增强食管鳞癌细胞的侵袭迁移能力。     

miR-181-5p下调人非小细胞肺癌细胞KLF6表达并抑制其增殖、迁移和侵袭

[目的]探讨miR-181-5p下调人非小细胞肺癌细胞KLF6表达并抑制其增殖、迁移和侵袭的作用。[方法]检测30例肺癌和癌旁组织中miR-181-5p和KLF6 mRNA水平,并分析miR-181-5p与NSCLC患者临床病理特征的相关性。用萤光素酶检测miR-181-5p对KLF6的调控作用,将miR-NC、miR-181-5p inhibitor和miR-181-5p mimic转染到A549细胞,采用RT-PCR法检测各组A549细胞中miR-181-5p和KLF6 mRNA表达,同时分别采用MTT法和Transwell法检测各组A549细胞增殖、迁移和侵袭情况。[结果]肺癌组织的miR-181-5p和KLF6 mRNA表达水平均低于癌旁组织(P<0.05);miR-181-5p的表达水平与年龄、性别和是否吸烟不相关(P>0.05);miR-181-5p的表达水平与肿瘤直径、是否转移、TNM分期相关(P<0.05);miR-181-5p与KLF6有潜在的结合位点;转染miR-181-5p mimic可明显增加KLF6-wt的荧光素酶活性,对KLF6-mut没有...     

miR-320a-5p靶向GINS2调控甲状腺鳞癌细胞SW579凋亡的机制研究

[目的]探讨miR-320a-5p调控甲状腺鳞癌细胞SW579凋亡的潜在机制.[方法]使用miR-320a-5p mim-ics 和miR-320a-5p inhibitor甲状腺鳞癌细胞SW579中过表达或敲低miR-320a-5p,检测细胞的凋亡水平.通过miRDB,HumanTargetScan,RNAhybri...     

miR-204-5p regulates cell proliferation,invasion, and apoptosis by targeting IL-11 in esophageal squamous cell carcinoma

Esophageal cancer (EC) is the world's eighth most common malignant neoplasm and is ranked as the sixth leading cause of death related to cancer. Aberrant microRNA (miRNA) expression has been reported to be associated with esophageal squamous cell carcinoma. However, the molecular mechanism of miR-204-5p in esophageal squamous cell carcinoma (ESCC) is not clear. Therefore, the aim of this study was to investigate the potential role of miR-204-5p in ESCC. In the present study, we found that miR-204-5p could affect ESCC proliferation, invasion, apoptosis, and cell cycle in cell and mouse models. A dual-luciferase reporter assay showed that miR-204-5p expression was negatively correlated with interleukin-11 (IL-11) expression. IL-11 overexpression reversed the suppressive effects of miR-204-5p in the cell lines. These results indicated that miR-204-5p functions as a tumor suppressor by directly targeting IL-11 in ESCC.     

CircTIMELESS regulates the proliferation and invasion of lung squamous cell carcinoma cells via the miR-136-5p/ROCK1 axis

Numerous studies demonstrate that circular RNAs (circRNAs) are critical regulators of the occurrence and progression of tumors. However, research on the involvement of circRNAs in lung squamous cell carcinoma (LUSC) is limited. In our study, circTIMELESS (also named hsa_circ_0000408 in the Human circRNA Database) was upregulated in both LUSC tissues and LUSC cells, and circTIMELESS expression was positively associated with the TNM stage. Moreover, circTIMELESS silencing markedly suppressed invasion in vitro and disrupted proliferation in vitro as well as in vivo. Additional investigations have shown that circTIMELESS functions as a miR-136-5p “sponge” and regulates miR-136-5p expression. Furthermore, the impact of miR-136-5p upregulation was consistent with the results of circTIMELESS silencing, both of which inhibited the proliferation and invasion of LUSC cells. Additional results showed that Rho-associated coiled-coil containing protein kinase 1 (ROCK1) is targeted by miR-136-5p. The results of recovery experiments showed that ROCK1 overexpression partly rescued the impact of circTIMELESS silencing and miR-136-5p upregulation on proliferation and invasion. Consequently, our findings confirmed that circTIMELESS exists in LUSC and acts as a tumor promoter through the miR-136-5p/ROCK1 axis. Based on these findings, circTIMELESS may be potentially utilized as a therapeutic target for LUSC.     

MiR-143-3p suppresses cell proliferation,migration, and invasion by targeting Melanoma-Associated Antigen A9 in laryngeal squamous cell carcinoma

Previously we found that melanoma-associated antigen-A9 (MAGE-A9) was a significantly upregulated biomarker in laryngeal squamous cell carcinoma (LSCC). A high expression of MAGE-A9 indicates an unfavorable survival outcome, and the MAGE-A9 expression level is an independent prognostic factor of LSCC. To explore the mechanism of MAGE-A9 upregulation, several predicted regulatory microRNAs were screened and validated in LSCC cells. In the current study, we found that miR-143-3p (MAGE-A9 related miRNAs) expression levels correlated negatively with the MAGE-A9 protein expression in LSCC tissues. Dual-luciferase reporter assays and Western blot analysis revealed MAGE-A9 to be a direct target of miR-143-3p. Furthermore, a series of in vitro gain- and loss-of-function assays revealed that miR-143-3p inhibited LSCC cell proliferation, migration, and invasion. Also, miR-143-3p suppressed LSCC tumorigenesis in vivo. These effects were clinically relevant, as a lower expression of miR-143-3p occurred in severer clinical stages and represented poor overall survival in patients with LSCC. Taken together, these results suggest that downregulation of miR-143-3p contributes to tumor progression through upregulation of MAGE-A9. The expression level of these two key molecules maintained LSCC progression, thus, highlighting the potential of miR-143-3p as a therapeutic target for human LSCC.     

Linc-ROR regulates apoptosis in esophageal squamous cell carcinoma via modulation of p53 ubiquitination by targeting miR-204-5p/MDM2

The long intergenic noncoding RNA, regulator of reprogramming (linc-ROR) has been reported to participate in tumorigenesis, while its functions and fundamental mechanisms in esophageal squamous cell carcinoma (ESCC) remain unclear. In this study, gain-of-function assays showed that linc-ROR upregulation enhanced cell viability, promoted cell proliferation, and inhibited apoptosis. Mechanistically, the regulatory network of linc-ROR/miR-204-5p/MDM2 was established with bioinformatics analysis and online databases, then validated via dual-luciferase reporter assays, RNA immunoprecipitation assays in ESCC cells. Linc-ROR positively regulates the expression of MDM2 as a molecular sponge of miR-204-5p. Moreover, results of western blot and coimmunoprecipitation indicated that linc-ROR overexpression enhanced the ubiquitination level of p53, and its downstream apoptosis-related genes have showed higher bcl-2 expression, lower bax, and cleaved caspase-3 expressions, while miR-204-5p could counteract with this effect. Finally, small interfering RNAs tailored to linc-ROR were established to further evaluate its effects on ESCC comprehensively. In summary, this study revealed that linc-ROR modulated cell apoptosis and regulated p53 ubiquitination via targeting miR-204-5p/MDM2 axis, which provides a novel therapeutic insight into treatments for ESCC.     

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.