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...     

Hsa-miR-5195-3p对人宫颈癌细胞SiHa增殖、迁移与侵袭的影响

目的:探讨mi R-5195-3p对人宫颈癌细胞系Si Ha增殖、迁移与侵袭的影响。方法:采用qRT-PCR检测人宫颈癌细胞SiHa和正常上皮细胞HaCaT中mi R-5195-3p的表达水平。将mi R-5195-3p mimic转染至Si Ha细胞中构建外源性过表达细胞株,阴性对照组中则转染NC mimic,并用q RT-PCR验证转染效率;通过MTT和集落形成实验检测细胞增殖能力;划痕愈合实验检测细胞横向迁移能力; Transwell小室实验检测细胞纵向迁移能力和侵袭能力;采用qRT-PCR和Western blot检测E-cadherin、Vimentin与snail m RNA转录水平及蛋白表达水平。结果:宫颈癌细胞Si Ha中的mi R-5195-3p表达水平较HaCaT偏低(P 0. 05)。与阴性对照组相比,转染mi R-5195-3p mimic的SiHa细胞中mi R-5195-3p水平显著增高(P 0. 01);并且其体外增殖(P 0. 001),迁移(P 0. 001)与侵袭能力(P 0. 001)明显减弱;同时E-cadherin表达水平上调而Vimentin、snail表达水平下调。结论:过表达mi R-5195-3p可能通过阻碍EMT通路抑制宫颈癌细胞Si Ha的增殖,迁移与侵袭。     

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-491-5p靶向调控SHOC2对食管鳞癌细胞增殖、迁移及侵袭的影响

目的探讨miR-491-5p对食管鳞癌细胞增殖、迁移及侵袭的影响及作用机制。 方法培养永生化食管上皮细胞株HET-1A和人食管癌细胞株EC109,EC9706,KYSE510,qRT-PCR检测细胞中miR-491-5p和富含亮氨酸重复蛋白SHOC2 （SHOC2） mRNA水平。EC109细胞分为空白对照组、miR- 491-5p组、miR-NC组、miR-491-5p+pcDNA-SHOC2组和miR-491-5p+pcDNA组,MTT检测细胞增殖,Transwell检测细胞迁移和侵袭,Western Blot法检测CyclinD1、Vimentin、E-cadherin以及MAPK/ERK信号通路相关蛋白水平。双荧光素酶报告基因实验验证miR- 491- 5p与SHOC2之间调控关系。两组间比较采用独立样本t检验,多组间比较采用单因素方差分析,两两比较采用SNK-q检验。 结果食管鳞癌细胞EC109、EC9706和KYSE510中miR-491-5p表达水平低于HET-1A细胞（0.32±0.06、0.62±0.10、0.61±0.08比1.00±0.08）,差异具有统计学意义（F = 106.340,P < 0.001）;SHOC2 mRNA表达水平高于HET- 1A细胞（2.85±0.16、1.73±0.10、1.45±0.06比1.02±0.09）,差异具有统计学意义（F = 464.949,P < 0.001）。miR-491-5p组EC109细胞培养72 h后的OD值、细胞迁移数、侵袭数及CyclinD1、Vimentin、p-MEK和p-ERK蛋白水平均低于miR-NC组（0.70±0.06比1.42±0.08,65.01±10.36比150.01±12.48,70.03±10.26比140.02±11.85,0.30±0.03比0.93±0.16,0.41±0.05比0.86±0.08,0.32±0.06比0.95±0.11,0.40±0.06比0.92±0.13）,差异具有统计学意义（F = 236.565、159.440、120.706、101.071、98.619、130.766、77.046,P均< 0.001）,E-cadherin蛋白水平高于miR-NC组（0.89±0.13比0.48±0.08）,差异具有统计学意义（F = 816.432,P < 0.001）。miR-491-5p在EC109细胞中负调控SHOC2表达,SHOC2过表达逆转了miR-491-5p过表达对EC109细胞增殖、迁移和侵袭及MAPK/ERK信号通路的影响。 结论miR-491-5p可抑制食管鳞癌细胞的增殖、迁移和侵袭,其作用机制可能与下调SHOC2表达抑制MAPK/ERK信号通路活性有关。     

甲状腺乳头状癌组织微小RNA-93-5p、微小RNA-98-5p表达与临床病理特征和增殖、侵袭基因表达的关系研究

摘要 目的：研究甲状腺乳头状癌（PTC）组织微小核糖核酸-93-5p（miR-93-5p）、微小RNA-98-5p（miR-98-5p）表达与临床病理特征和增殖、侵袭基因表达的关系。方法：选取2020年10月到2023年10月在广东省中医院行手术切除的PTC患者153例作为研究对象,收集术中切除的癌组织以及癌旁组织。检测并比较癌组织与癌旁组织miR-93-5p、miR-98-5p及增殖基因、侵袭基因mRNA表达水平,分析miR-93-5p及miR-98-5p表达与PTC患者临床病理特征的关系。利用Pearson法分析miR-93-5p、miR-98-5p表达水平与增殖基因、侵袭基因mRNA表达的相关性。结果：癌组织的miR-93-5p表达水平较癌旁组织更高,miR-98-5p表达水平较癌旁组织更低（P<0.05）。miR-93-5p高表达PTC患者TNM分期Ⅲ~Ⅳ期、有淋巴结转移及低分化的比例较miR-93-5p低表达PTC患者更高（P<0.05）。miR-98-5p低表达PTC患者TNM分期Ⅲ~Ⅳ期、有淋巴结转移及低分化的比例较miR-98-5p高表达PTC患者更高（P<0.05）。癌组织的增殖基因程序性细胞死亡因子4（PDCD4）及蛋白磷酸酶4调节亚基 （PP4R1）水平较癌旁组织更低（P<0.05）,侵袭基因金属蛋白酶解离素9（ADAM9）及Bcl-6共抑制因子样蛋白（BCORL1）水平较癌旁组织更高（P<0.05）。Pearson法分析结果显示,miR-93-5p表达与增殖基因PDCD4及PP4R1表达水平呈负相关,与侵袭基因ADAM9及BCORL1表达水平呈正相关。miR-98-5p表达水平与增殖基因PDCD4及PP4R1水平呈正相关,与侵袭基因ADAM9及BCORL1表达水平呈负相关。结论：PTC患者癌组织miR-93-5p表达升高,miR-98-5p表达降低,与TNM分期、淋巴结转移及分化程度等临床病理特征有关,还可促进PTC癌细胞增殖、侵袭。     

甘草提取物通过调控miR-212-5p/BCL2L2 基因抑制甲状腺肿瘤细胞的增殖、迁移和侵袭

目的探讨甘草提取物GL-1对甲状腺肿瘤细胞增殖、迁移和侵袭的影响及其分子机制。方法以10、20、30 μg/mL GL-1处理甲状腺肿瘤细胞CAL-62,或在CAL-62细胞中转染miR-212-5p mimics、anti-miR-212-5p、si-BCL2L2、pcDNA-BCL2L2。其中转染pcDNA-BCL2L2细胞并以30 μg/mL GL-1处理。噻唑蓝比色法 (MTT)检测CAL-62细胞增殖,Transwell小室法检测CAL-62细胞迁移和侵袭,实时定量PCR (qPCR)检测CAL-62细胞中miR-212-5p表达,Western blot检测相关蛋白Bcl-2样蛋白2 (BCL2L2)、细胞周期蛋白D1 (Cyclin D1)和基质金属蛋白酶-2 (MMP-2)表达。生物学信息预测miR-212-5p的下游靶基因,双荧光素酶基因报告实验进一步验证。数据采用单因素方差分析、Tukey’s事后检验和t检验。结果与对照组相比,10、20、30 μg/mL浓度GL-1降低CAL-62细胞24、48、72 h的细胞活性 (P < 0.05),并呈剂量、时间依赖性。与对照组相比,10、20、30 μg/mL浓度GL-1干预后,CAL-62细胞侵袭数[(143.56±14.22)个、(100.32±10.23)个、(68.23±6.49)个比(189.65±15.23)个]、迁移数[(198.56±14.35)个、(141.35±12.58)个、(89.56±8.95)个比 (295.36±17.56)个]和BCL2L2蛋白表达量 (0.76±0.08、0.51±0.06、0.24±0.02比1.00±0.12)均降低 (P 均< 0.05),而miR-212-5p水平 (1.61±0.11、1.99±0.13、2.28±0.15比1.00±0.07)升高(P < 0.05),并呈剂量依赖性。过表达miR-212-5p和沉默BCL2L2表达在24、48、72 h时CAL-62细胞活性、细胞迁移数、侵袭数和Cyclin D1、MMP-2蛋白表达量降低 (P < 0.05)。生物学信息预测和双荧光素酶基因报告实验证实BCL2L2是miR-212-5p的靶基因。过表达miR-212-5p抑制BCL2L2蛋白水平,沉默miR-212-5p促进BCL2L2蛋白表达 (P < 0.05)。过表达BCL2L2可逆转GL-1对CAL-62细胞增殖、迁移、侵袭及Cyclin D1、MMP-2蛋白表达的抑制作用。结论 GL-1通过miR-212-5p/BCL2L2抑制甲状腺肿瘤细胞的增殖、迁移和侵袭。     

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...     

下调lncRNA MCF2L-AS1靶向miR-33b-5p抑制胃癌细胞增殖、迁移、侵袭并促进凋亡

摘要 目的：探讨lncRNA MCF2L-AS1对胃癌细胞恶性生物学行为的影响及分子机制。方法：选取45例胃癌患者的癌组织及癌旁正常组织,或培养胃黏膜上皮细胞GES-1、胃癌细胞HGC-27,采用RT-qPCR检测MCF2L-AS1和miR-33b-5p的表达水平。采用双荧光素酶报告实验检测MCF2L-AS1和miR-33b-5p的靶向关系。将HGC-27细胞分为si-NC组、si-MCF2L-AS1组、mimic NC组、miR-33b-5p mimic组、si-MCF2L-AS1+inhibitor NC组、si-MCF2L-AS1+miR-33b-5p inhibitor组,分别转染si-NC、si-MCF2L-AS1、mimic NC、miR-33b-5p mimic或共转染si-MCF2L-AS1+inhibitor NC、si-MCF2L-AS1+miR-33b-5p inhibitor。采用MTT实验检测细胞增殖情况,流式细胞术检测细胞凋亡率,克隆形成实验检测细胞克隆形成数,Transwell实验检测迁移和侵袭细胞数。结果：与癌旁正常组织或GES-1细胞相比,胃癌组织或HGC-27细胞中MCF2L-AS1表达水平升高、miR-33b-5p表达水平降低,差异均有统计学意义（P<0.05）。MCF2L-AS1可靶向调控miR-33b-5p。下调MCF2L-AS1或过表达miR-33b-5p,miR-33b-5p表达水平升高,HGC-27细胞凋亡率升高,但细胞增殖、克隆形成数、迁移和侵袭数均减少,差异均有统计学意义（P<0.05）。抑制miR-33b-5p可减弱下调MCF2L-AS1对HGC-27细胞的生物学作用。结论：下调MCF2L-AS1通过上调miR-33b-5p抑制胃癌细胞增殖、迁移、侵袭并促进凋亡;MCF2L-AS1通过靶向调控miR-33b-5p表达进而参与胃癌细胞的恶性生物学行为。     

MiR-1266 promotes cell proliferation,migration and invasion in cervical cancer by targeting DAB2IP

Cervical cancer (CC) is one of the most prevalent cancers in women in the world. However, the pathogenesis is still very unclear, and the current screening methods are too expensive. Emerging evidence shows that miR-1266 has great influence on tumor cell migration and invasion. In order to clarify the role of miR-1266 in CC, we collected serum from CC, high-grade squamous intraepithelial lesion (HSIL), low-grade squamous intraepithelial lesion (LSIL) and normal control (NC), collected tissues from CC and control group (CG), and followed up 50 CC patients. We used HeLa and SiHa cells to clarify the roles of miR-1266 on cell proliferation, migration and invasion. The CC mouse model was conducted to prove the role of miR-1266 on tumorigenesis. qRT-PCR was used to measure the expressions of miR-1266 and DAB2IP mRNA. Western blot was used to determine the expression of DAB2IP protein. Cell counting kit-8 proliferation assay (CCK-8), Colony formation assay, Wound-healing assay and Transwell invasion assay were used to determine the cell survival, proliferative, migrative and invasive abilities. Our study found that miR-1266 had a rising trend in serum from NC to LSIL to HSIL to CC, and increased in CC tissues. High expression serum miR-1266 had lower overall survival rates than patients with miR-1266 low expression. MiR-1266 promoted cell viability, proliferation, migration and invasion by targeting DAB2IP. And miR-1266 could promote tumorigenesis in vivo. In conclusion, miR-1266 could be used as a new biomarker for diagnosis, prediction and treatment of CC in the future.     

miR-342-3p suppresses proliferation,migration and invasion by targeting FOXM1 in human cervical cancer

FOXM1 is a well-established oncogenic factor that has been reported to be involved in multiple biological processes including cell proliferation, growth, angiogenesis, migration and invasion. It can also be regulated by miRNAs. In this study, we reported that FOXM1 is directly targeted by miR-342-3p, which is down-regulated along with its host gene, EVL, in human cervical cancer tissues compared to the adjacent normal tissues. Functional studies suggested that the overexpression of miR-342-3p inhibits cell proliferation, migration and invasion in cervical cell lines. FOXM1 is upregulated and negatively correlates with miR-342-3p in cervical cancer tissues, and the overexpression of FOXM1 rescues the phenotype changes induced by the overexpression of miR-342-3p.     

lncRNA MAGI2-AS3下调miR-31-5p抑制肺腺癌细胞的增殖、迁移、侵袭并促进凋亡

目的研究lncRNA MAGI2-AS3对肺癌A549细胞增殖、迁移、侵袭和凋亡的影响和潜在的分子机制。方法根据转染载体不同将A549细胞分为pcDNA3.1组(转染pcDNA3.1)、pcDNA3.1-MAGI2-AS3组(转染pcDNA3.1-MAGI2-AS3)、anti-miR-NC组(转染anti-miR-NC)、anti-miR-31-5p组(转染anti-miR-31-5p)、pcDNA3.1-MAGI2-AS3+miR-NC组(共转染pcDNA3.1-MAGI2-AS3和miR-NC)、pcDNA3.1-MAGI2-AS3+miR-31-5p组(共转染pcDNA3.1-MAGI2-AS3和miR-31-5p mimics)。实时荧光定量PCR(qRT-PCR)检测miR-31-5p和MAGI2-AS3 RNA的表达,四氮唑蓝(MTT)法测定A549细胞增殖活性,Transwell实验检测细胞迁移和侵袭能力,双荧光素酶报告系统验证MAGI2-AS3与miR-31-5p的调控关系,流式细胞术检测细胞凋亡与周期。两组间比较采用独立样本t检验进行分析;多组间比较采用单因素方差分析,组内多重比较采用SNK-q检验。结果与人正常肺细胞HBE相比,肺癌细胞A549中的MAGI2-AS3表达量(0.48±0.03比1.29±0.06)降低,miR-31-5p表达量(1.01±0.05比0.25±0.02)升高;与pcDNA3.1组比较,pcDNA3.1-MAGI2-AS3组A549细胞活力(0.48±0.04比0.77±0.06)、迁移[(81.33±2.87)个比(124.33±3.09)个]和侵袭[(32.00±2.83)个比(53.00±3.27)个]细胞数、S期细胞所占比例(23.01﹪±1.00﹪比32.95﹪±1.06﹪)均降低,凋亡率(19.95﹪±1.25﹪比7.23﹪±0.51﹪)、G0-G1期细胞所占比例(43.58﹪±2.15﹪比33.56﹪±1.23﹪)均升高;与anti-miR-NC组比较,anti-miR-31-5p组A549细胞活力(0.53±0.04比0.78±0.06)、迁移[(76.00±3.74)个比(108.33±2.87)个]和侵袭[(30.00±1.63)个比(42.33±2.05)个]细胞数、S期细胞所占比例(24.43﹪±1.13﹪比32.91﹪±1.08﹪)降低,凋亡率(18.21﹪±1.24﹪比7.29﹪±0.51﹪)、G0-G1期细胞所占比例(41.56﹪±2.19﹪比33.53﹪±1.27﹪)升高,差异有统计学意义(P均<0.05);双荧光素酶报告系统结果显示,MAGI2-AS3靶向负调控miR-31-5p的表达。与pcDNA3.1-MAGI2-AS3+miR-NC组比较,pcDNA3.1-MAGI2-AS3+miR-31-5p组A549细胞活力(0.68±0.06比0.50±0.04)、迁移[(91.00±1.63)个比(52.67±2.62)个]和侵袭[(62.67±2.49)个比(31.67±4.03个)]细胞数升高,凋亡率(10.59﹪±1.0﹪比21.11﹪±1.14﹪)降低,差异有统计学意义(P均<0.05)。结论lncRNA MAGI2-AS3通过靶向miR-31-5p抑制A549细胞的增殖、迁移和侵袭,促进细胞凋亡。lncRNA MAGI2-AS3是肺癌潜在分子治疗靶点。     

LncRNA ZNF667-AS1靶向miR-31-5p对食管癌细胞增殖、迁移和凋亡的机制研究

目的 探究长链非编码RNA(lncRNA)ZNF667-AS1通过靶向miR-31-5p对食管癌细胞增殖和迁移的影响及潜在的机制.方法 采用实时荧光定量PCR(qPCR)技术检测ZNF667-AS1在食管癌细胞Eca109、EC1、TE1和正常食管上皮细胞Het-1A的表达水平,并选择表达差异最大的细胞株进行后续实验....     

miR-129-5p inhibits proliferation,migration, and invasion in rectal adenocarcinoma cells through targeting E2F7

microRNAs (miRNAs), a kind of small noncoding RNAs, are considered able to regulate expression of genes and mediate RNA silencing. miR-129-5p was shown to be a cancer-related miRNA. However, the influence of miR-129-5p in rectal adenocarcinoma (READ) development remains to be determined. Based on the TCGA data, downregulation of miR-129-5p in READ samples was observed. Manual restoration of the miR-129-5p in SW1463 and SW480 cell lines significantly inhibited invasion, migration, and proliferation of READ cell lines, while the apoptosis ability was enhanced. Meanwhile, we found E2F7 acted as a potential target of miR-129-5p and was upregulated in READ samples. E2F7 upregulation reversed the repression of miR-129-5p on READ development. Finally, in vivo experiments showed that inhibition of tumor growth in nude mice was achieved through upregulating miR-129-5p. Overall, our findings suggest increasing of miR-129-5p leads to the suppression of READ progression through regulating the expression of E2F7, which may provide novel insights into the treatment of READ.     

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-140-3p impedes the proliferation of human cervical cancer cells by targeting RRM2 to induce cell-cycle arrest and early apoptosis

Cervical cancer is a critically malignant tumor with the second mortality of females worldwide. MicroRNAs (miRNAs) are short but regulatory non-coding RNAs playing a pivotal role in many biological processes including tumorigenesis. However, the exact role of miR-140-3p in cervical cancer remains to be elucidated. Here we identified that miR-140-3p was significantly reduced in cervical cancer tissues by comprehensive analysis of TCGA data, hinting that higher expression level of miR-140-3p predicted a good clinical prognosis. Quantitative real-time PCR (RT-qPCR) assay was performed to confirm the negative correlation between miR-140-3p expression level and human cervical cancer tissues as well as various cervical cancer cell lines. To clarify the certain role of miR-140-3p, forced expression by microRNA mimics was applied in Caski and C33A cells, showing that miR-140-3p overexpression significantly impeded the proliferation of cervical cancer cells by cell count kit (CCK-8) assay. Western blot analysis of cell cycle-related proteins Cyclin A, Cyclin B1 and Cyclin D1 have further confirmed the cell cycle arrest was induced by the ectopic expression of miR-140-3p. Annexin-V based FACS analysis also found the simultaneous appearance of early apoptotic cell population in miR-140-3p overexpression cells. The protein level of BCL-2 was attenuated in accompany with elevated Bax and Cleaved caspase-3 protein, indicating miR-140-3p overexpression induced early apoptosis. Mechanistically, we demonstrated that miR-140-3p could target the 3′UTR of RRM2 which has been proved to be highly involved in the onset of cancer. Furthermore, upregulation of miR-140-3p and RRM2 failed to inhibit the proliferation of human cervical cancer cells, revealing that RRM2 served as the target downstream gene of miR-140-3p abolishing its ability as a tumor suppressor. Overall, we figured out the new role of miR-140-3p in cervical cancer and concluded that miR-140-3p was a candidate of cancer control in preclinical.