miR-30c Impedes Glioblastoma Cell Proliferation and Migration by Targeting SOX9

miR-30c has been acknowledged as a tumor suppressor in various human cancers, such as ovarian cancer, gastric cancer, and prostate cancer. However, the role of miR-30c in glioblastoma (GBM) needs to be investigated. In our study, we found that the expression of miR-30c was significantly downregulated in GBM tissues and cell lines. We found that overexpression of miR-30c inhibited cellular proliferation of GBM cells in vitro and in vivo. More GBM cells were arrested in the G₀ phase after miR-30c overexpression. Moreover, we showed that miR-30c overexpression suppressed the migration and invasion of GBM cells. Mechanistically, we found that SOX9 was a direct target of miR-30c in GBM cells. Overexpression of miR-30c inhibited the mRNA and protein levels of SOX9 in GBM cells. Moreover, there was a negative correlation between the expression of miR-30c and SOX9 in GBM tissues. Finally, we showed that restoration of SOX9 in GBM cells reversed the proliferation, migration, and invasion of GBM cells transfected with miR-30c mimic. Collectively, our results demonstrated that miR-30c suppressed the proliferation, migration, and invasion of GBM cells via targeting SOX9.     

Long Noncoding RNA WEE2-AS1 Plays an Oncogenic Role in Glioblastoma by Functioning as a Molecular Sponge for MicroRNA-520f-3p

The long noncoding RNA WEE2 antisense RNA 1 (WEE2-AS1) plays an oncogenic role in hepatocellular carcinoma and triple negative breast cancer progression. In this study, we investigated the expression and roles of WEE2-AS1 in glioblastoma (GBM). Furthermore, the molecular mechanisms behind the oncogenic actions of WEE2-AS1 in GBM cells were explored in detail. WEE2-AS1 expression was detected using quantitative real-time polymerase chain reaction. The roles of WEE2-AS1 in GBM cells were evaluated by the cell counting kit-8 assay, flow cytometric analysis, Transwell cell migration and invasion assays, and tumor xenograft experiments. WEE2-AS1 expression was evidently enhanced in GBM tissues and cell lines compared with their normal counterparts. An increased level of WEE2-AS1 was correlated with the average tumor diameter, Karnofsky Performance Scale score, and shorter overall survival among GBM patients. Functionally, depleted WEE2-AS1 attenuated GBM cell proliferation, migration, and invasion in vitro, promoted cell apoptosis, and impaired tumor growth in vivo. Mechanistically, WEE2-AS1 functioned as a molecular sponge for microRNA- 520f-3p (miR-520f-3p) and consequently increased specificity protein 1 (SP1) expression in GBM cells. A series of recovery experiments revealed that the inhibition of miR-520f-3p and upregulation of SP1 could partially abrogate the influences of WEE2-AS1 downregulation on GBM cells. In conclusion, WEE2-AS1 can adsorb miR-520f-3p to increase endogenous SP1 expression, thereby facilitating the malignancy of GBM. Therefore, targeting the WEE2-AS1–miR-520f-3p–SP1 pathway might be a promising therapy for the management of GBM in the future.     

lncRNA RHPN1-AS1靶向miR-485-5p调控骨肉瘤细胞增殖、凋亡、迁移、侵袭及其分子机制

目的:探讨lncRNA RHPN1反义RNA1（RHPN1-AS1）靶向miR-485-5p对骨肉瘤细胞增殖、凋亡、迁移、侵袭的影响和机制。方法:实时荧光定量PCR（qRT-PCR）检测20例骨肉瘤组织与其对应的癌旁组织、人正常成骨细胞hFOB1.19以及3种骨肉瘤细胞（U-2OS、SAOS-2、HOS）中RHPN1-AS1和miR-485-5p的表达水平。利用脂质体转染法将RHPN1-AS1小干扰RNA（si-RHPN1-AS1）、小干扰RNA阴性对照（si-NC）、miR-485-5p模拟物（miR-485-5p mimics）、miRNA阴性对照（miR-NC）分别转染U-2OS细胞,四甲基偶氮唑蓝（MTT）法检测细胞活力,流式细胞术检测细胞凋亡,Transwell实验检测细胞迁移和侵袭能力,蛋白质印记（Western blot）检测细胞周期蛋白D1（Cyclin D1）、p21、p27、B细胞淋巴瘤/白血病-2（Bcl-2）、Bcl-2相关X蛋白（Bax）、基质金属蛋白酶2（MMP-2）、基质金属蛋白酶9（MMP-9）和基质金属蛋白酶14（MMP-14）蛋白的表达。双荧光素酶报告基因实验和qRT-PCR验证RHPN1-AS1和miR-485-5p的靶向调控关系。结果:与癌旁组织比较,骨肉瘤组织中RHPN1-AS1的表达水平显著升高,miR-485-5p的表达水平显著降低（P＜0.05）;与hFOB1.19细胞比较,3种骨肉瘤细胞中RHPN1-AS1的表达水平显著升高,miR-485-5p的表达水平显著降低（P＜0.05）。与si-NC组比较,si-RHPN1-AS1组U-2OS细胞的活力显著降低,迁移和侵袭能力显著降低,细胞凋亡率显著升高,Cyclin D1、Bcl-2、MMP-2、MMP-9和MMP-14蛋白的表达水平显著降低,p21、p27和Bax蛋白的表达水平显著升高（P＜0.05）;与miR-NC组比较,miR-485-5p组U-2OS细胞的活力显著降低,迁移和侵袭能力显著降低,细胞凋亡率显著升高,Cyclin D1、Bcl-2、MMP-2和MMP-9蛋白的表达水平显著降低,p21和Bax蛋白的表达水平显著升高（P＜0.05）。RHPN1-AS1靶向负性调控miR-485-5p表达。干扰miR-485-5p表达逆转了抑制lncRNA RHPN1-AS1表达对骨肉瘤U-2OS细胞增殖、凋亡、迁移和侵袭的影响。结论:抑制RHPN1-AS1通过上调miR-485-5p抑制骨肉瘤细胞增殖、迁移和侵袭,诱导细胞凋亡。     

The lncRNA FEZF1-AS1 Promotes the Progression of Colorectal Cancer Through Regulating OTX1 and Targeting miR-30a-5p

Long noncoding RNAs (lncRNAs) participate in and regulate the biological process of colorectal cancer (CRC) progression. Our previous research identified differentially expressed lncRNAs in 10 CRC tissues and 10 matched nontumor tissues by next-generation sequencing (NGS). In this study, we identified an lncRNA, FEZF1 antisense RNA 1 (FEZF1-AS1), and further explored its function and mechanism in CRC. We verified that FEZF1-AS1 is highly expressed in CRC tissues and cell lines. Through functional experiments, we found that reduced levels of FEZF1-AS1 significantly suppressed CRC cell migration, invasion, and proliferation and inhibited tumor growth in vivo. Mechanistically, we discovered that reduced levels of the lncRNA FEZF1- AS1 inhibited the activation of epithelial–mesenchymal transition (EMT); the overexpression of orthodenticle homeobox 1 (OTX1) partially rescued the FEZF1-AS1-induced inhibition of protein expression. It indicated that FEZF1-AS1 may play a role in the occurrence and development of CRC by regulating the FEZF1-AS1/ OTX1/EMT pathway. Furthermore, it was reported that FEZF1-AS1 is located in both the nucleus and cytoplasm of HCT116 cells. Dual-luciferase reporter assays verified that FEZF1-AS1 directly binds miR-30a-5p and negatively regulated each other. Further, we showed that 5 -nucleotidase ecto (NT5E) is a direct target of miR-30a-5p, and the inhibition of miR-30a-5p expression partially rescued the inhibitory effect of FEZF1-AS1 on NT5E. Our results indicated that the mechanism by which FEZF1-AS1 positively regulates the expression of NT5E is through sponging miR-30a-5p. Our study demonstrated that lncRNA FEZF1-AS1 is involved in the development of CRC and may serve as a diagnostic and therapeutic target for CRC patients.     

lncRNA GTSE1-AS1在前列腺癌组织中的表达及其对LNCaP细胞增殖与侵袭的影响

目的:探讨长链非编码RNA(long non-coding RNA,lncRNA)GTSE1-AS1在前列腺癌组织中的表达及其影响LNCaP细胞增殖和侵袭的机制.方法:收集2017年11月至2018年12月郑州大学附属洛阳中心医院泌尿外科手术切除的68例前列腺癌患者的癌和癌旁组织标本,以及前列腺癌细胞系LNCaP、PC...     

LncRNA IGFL2-AS1 functions as a ceRNA in regulating ARPP19 through competitive binding to miR-802 in gastric cancer

Gastric cancer (GC) is one of the most common malignancies of the digestive system worldwide. Multiple long noncoding RNAs (lncRNAs) participate in the regulation of GC development and metastasis. In this study, we aimed to elucidate the expression and function of lncRNA IGFL2-AS1 in GC. We found that IGFL2-AS1 was highly expressed in GC tissues and cell lines. Knockdown of IGFL2-AS1 suppressed GC cell proliferation, migration, and invasion in vitro. Furthermore, we identified that IGFL2-AS1 exerted its function as a molecular sponge of miR-802. MiR-802 was demonstrated to be a tumor suppressor, and overexpression of miR-802 suppressed GC cell growth, migration, and invasion. Mechanistically, we revealed that the cAMP-regulated phosphoprotein 19 (ARPP19) was a direct target of miR-802 and could reverse the inhibitory function of miR-802. Moreover, our results confirmed that knockdown of IGFL2-AS1 inhibited GC tumor development in an in vivo GC tumor xenograft model. In summary, our data suggest that the IGFL2-AS1/miR-802/ARPP19 axis plays a critical role in the progression and metastasis of GC. Therapies targeting the IGFL2-AS1/miR-802/ARPP19 axis can potentially improve GC treatment.     

lncRNA NUP50-AS1 在食管鳞癌组织中的表达及其对Eca109 细胞恶性生物学行为的影响

目的:探讨长链非编码RNA（long non-coding RNA, lncRNA）NUP50-AS1 在食管鳞状细胞癌（esophageal squamous cell cancer, ESCC）组织及细胞株中的表达及其对人食管癌Eca109 细胞增殖、迁移和侵袭的影响。方法：选取自2015 年1 月至2016 年12 月河北医科大学第四医院生物标本库的49 例ESCC手术患者的癌组织和相应癌旁组织,qRT-PCR检测ESCC癌组织、癌旁组织及5 种食管癌细胞株（TE1、TE13、Eca109、Kyse150 和Kyse170）中NUP50-AS1 表达水平。shRNA 转染NUP50-AS1 后,选用sh2 -NUP50-AS1 进行后续功能实验。采用MTS法、克隆形成实验检测敲减NUP50-AS1 表达对Eca109 细胞增殖的影响,划痕实验检测敲减NUP50-AS1 表达对细胞迁移的影响,Transwell 小室实验检测敲减NUP50-AS1 表达对细胞侵袭的影响。结果：NUP50-AS1 在ESCC组织中的相对表达量显著高于癌旁组织(2.003±0.870 vs 1.000±0.000,P<0.05）;NUP50-AS1 在ESCC组织中的表达水平与淋巴结转移及TNM分期相关（均P<0.01）,NUP50-AS1 在5 株食管癌细胞系中相对表达量均明显上调（P<0.05）,其中Eca109 细胞的NUP50-AS1 表达水平最高。转染后,sh2-NUP50-AS1 转染组干扰效率最高,敲低NUP50-AS1 可明显抑制Eca109 细胞增殖、迁移和侵袭能力。结论：ESCC组织中lncRNA NUP50-AS1 表达明显高于癌旁组织,且与癌症分期和淋巴结转移有关,敲减其表达明显抑制食管癌细胞增殖、迁移和侵袭能力,NUP50-AS1 的高表达可能与ESCC的发生发展密切相关。     

miR-132 Targets FOXA1 and Exerts Tumor-Suppressing Functions in Thyroid Cancer

MicroRNA-132 (miR-132) has been demonstrated to be a tumor suppressor in several types of tumors. However, the expression and the role of miR-132 in human thyroid cancer are still poorly understood. The aim of the present study was to examine the potential roles and molecular mechanism of miR-132 in thyroid cancer. We found that miR-132 expression levels were significantly downregulated in thyroid cancer tissues and cell lines. Function assays showed that overexpression of miR-132 in TPC1 cells inhibited cell proliferation, migration, and invasion. Forkhead box protein A1 (FOXA1) was identified as a direct target of miR-132 in thyroid cancer cells. Knockdown of FOXA1 in TPC1 cells significantly inhibited cell proliferation, migration, and invasion, which mimicked the suppressive effect induced by miR-132 overexpression. Restoration of FOXA1 expression partially reversed the suppressive effect induced by miR-132 overexpression. Taken together, these results suggested that miR-132 acts as a tumor suppressor in thyroid cancer through targeting FOXA1.     

LncRNA NR2F2-AS1 induces epithelial-mesenchymal transition of non-small cell lung cancer by modulating BVR/ATF-2 pathway via regulating miR-545-5p/c-Met axis

Non-small cell lung cancer (NSCLC) is one type of the most common cancers, which results in the major death worldwide. This study focuses on the understanding of the molecular mechanism of lncRNA NR2F2-AS1 and its regulation on epithelial-mesenchymal transition (EMT) in the development of NSCLC. Expressions of lncRNA NR2F2-AS1, miR-545-5p, c-Met, biliverdin reductase (BVR), ATF-2 and EMT-related markers in NSCLC tissues and cells were measured by western blotting and RT-qPCR assays. The impact of lncRNA NR2F2-AS1 and miR-545-5p on the cell proliferation, migration, invasion and EMT were analyzed by CCK-8, colony formation, wound healing and transwell assays. The interactions among lncRNA NR2F2-AS1, miR-545-5p and c-Met predicted by bioinformatic analysis were evaluated through dual luciferase reporter assay and fluorescence in situ hybridization (FISH). After generating tumor xenografts, immunohistochemistry was utilized to measure the expression of Ki-67 and EMT-related proteins in vivo. Our results showed that lncRNA NR2F2-AS1, c-Met, BVR and ATF-2 were overexpressed while miR-545-5p was silenced in NSCLC tissues and cells. Silencing of lncRNA NR2F2-AS1 or upregulating miR-545-5p significantly inhibited the cell proliferation, migration, invasion and EMT process. The EMT process could be inhibited by suppressing c-Met/BVR/ATF-2 axis. The tumor xenograft experiments demonstrated that the tumor growth and EMT process were significantly inhibited by silencing lncRNA NR2F2-AS1 or overexpression of miR-545-5p in vivo. LncRNA NR2F2-AS1 promoted the NSCLC development through suppressing miR-545-5p to activate EMT process through c-Met/BVR/ATF-2 axis. Our study indicated that lncRNA NR2F2-AS1 and miR-545-5p could be used as potential therapeutic targets to improve NSCLC treatment.     

miR-132 Targets FOXA1 and Exerts Tumor-Suppressing Functions in Thyroid Cancer

MicroRNA-132 (miR-132) has been demonstrated to be a tumor suppressor in several types of tumors. However, the expression and the role of miR-132 in human thyroid cancer are still poorly understood. The aim of the present study was to examine the potential roles and molecular mechanism of miR-132 in thyroid cancer. We found that miR-132 expression levels were significantly downregulated in thyroid cancer tissues and cell lines. Function assays showed that overexpression of miR-132 in TPC1 cells inhibited cell proliferation, migration, and invasion. Forkhead box protein A1 (FOXA1) was identified as a direct target of miR-132 in thyroid cancer cells. Knockdown of FOXA1 in TPC1 cells significantly inhibited cell proliferation, migration, and invasion, which mimicked the suppressive effect induced by miR-132 overexpression. Restoration of FOXA1 expression partially reversed the suppressive effect induced by miR-132 overexpression. Taken together, these results suggested that miR-132 acts as a tumor suppressor in thyroid cancer through targeting FOXA1.     

lncRNA SBF2-AS1 通过调控miR-140-5p/VEGFA 分子轴促进宫颈癌HeLa细胞上皮间质转化

目的：探讨lncRNA SBF2-AS1 通过调控miR-140-5p/血管内皮生长因子A（VEGFA）分子轴对宫颈癌HeLa 细胞上皮间质转化（EMT）的影响。方法：细胞培养和转染后分为NC、miR-140-5p mimic、miR-140-5p mimic+pcDNA-VEGFA、si-lncRNASBF2-AS1+pcDNA-VEGFA及si-lncRNA SBF2-AS1+miR-140-5p mimic组5 组。采用qPCR检测lncRNA SBF2-AS1 在宫颈癌组织及细胞系中的表达水平,双荧光素酶报告基因验让lncRNA SBF2-AS1、miR-140-5p 与VEGFA的靶向关系,WB检测HeLa细胞中VEGFA及EMT标志物N-cadherin、Vimentin 和E-cadherin 的表达水平,Transwell 实验检测HeLa细胞侵袭和迁移能力。结果：lncRNASBF2-AS1 在宫颈癌组织及细胞系中高表达（P<0.05 或P<0.01）,lncRNA SBF2-AS1 靶向结合miR-140-5p,且VEGFA 是miR-140-5p 的靶基因（P<0.05）。敲降lncRNA SBF2-AS1 抑制HeLa细胞侵袭、迁移及EMT。进一步实验证实,lncRNA SBF2-AS1通过miR-140-5p 上调VEGFA的表达水平,从而促进HeLa 细胞侵袭、迁移及EMT（P<0.05 或P<0.01）。结论：lncRNA SBF2-AS1通过miR-140-5p/VEGFA分子轴促进HeLa细胞EMT。     

GABPB1-AS1 acts as a tumor suppressor and inhibits non-small cell lung cancer progression by targeting miRNA-566/F-box protein 47

It has been certified that GABPB1-AS1 is aberrantly expressed and plays as a vital role in some kinds of cancers. However, its expression pattern and functions in non-small cell lung cancer (NSCLC) are still largely unknown. This study aims to assess GABPB1-AS1 expression and biological roles in NSCLC. The expression of GABPB1-AS1 was detected in NSCLC specimens and adjacent normal specimens. CCK8 and Transwell assays were performed to evaluate the effects of GABPB1-AS1 on NSCLC cell proliferation, migration and invasion. Bioinformatics tools and luciferase reporter assays were applied to predict and verify GABPB1-AS1’s direct targets. The results revealed that GABPB1-AS1 is sharply reduced in NSCLC specimens and cell lines. CCK8 assays indicated that overexpression of GABPB1-AS1 dramatically reduced NSCLC cell growth, and Transwell assays proved that NSCLC cell migration and invasion were distinctly inhibited by GABPB1-AS1. Exploration of the mechanism uncovered that miRNA-566 (miR-566)/F-box protein 47 (FBXO47) is directly targeted by GABPB1-AS1 in NSCLC. The study demonstrated that GABPB1-AS1 inhibited NSCLC cell proliferation, migration and invasion by targeting miR-566/FBXO47.     

miR-150 Suppresses Tumor Growth in Melanoma Through Downregulation of MYB

miR-150 has been demonstrated to inhibit tumor progression in various human cancers, including colorectal cancer, ovarian cancer, and thyroid cancer. However, the role of miR-150 in melanoma remains to be determined. In this study, we found that miR-150 was underexpressed in melanoma tissues and cell lines. Through transfection of miR-150 mimics, we found that miR-150 significantly inhibited the proliferation, migration, and invasion of melanoma cells. In mechanism, we found that MYB was a target of miR-150 in melanoma cells. Overexpression of miR-150 significantly inhibited mRNA and protein levels of MYB in melanoma cells. Moreover, there was an inverse correlation between the expression of miR-150 and MYB in melanoma tissues. We also showed that MYB was upregulated in melanoma tissues and cell lines. Through functional experiments, we found that restoration of MYB in miR-150-overexpressed melanoma cells rescued the proliferation, migration, and invasion. Therefore, our findings demonstrated that miR-150 suppressed the proliferation, migration, and invasion of melanoma cell by downregulating MYB.