敲低长链非编码RNA AFAP1-AS1抑制TPC-1甲状腺乳头状癌细胞上皮间质转化及其侵袭和迁移

目的 检测甲状腺乳头状癌组织长链非编码RNA (lncRNA)肌动蛋白丝相关蛋白1反义RNA1(AFAP1-AS1)的表达,敲低TPC-1甲状腺乳头状癌细胞AFAP1-AS1,研究其对TPC-1细胞上皮间质转化(EMT)的影响及相关分子机制.方法 采用实时定量PCR检测60例甲状腺乳头状癌组织lncRNA AFAP1-...     

Long non-coding RNA TP73-AS1 predicts poor prognosis and regulates cell proliferation and migration in cervical cancer

IntroductionCervical cancer is one of the most common malignant tumors in women, which seriously affects women’s health, especially in developing countries. This study aims to investigate novel molecular markers for poor prognosis of cervical cancer to achieve correct guidance of clinical treatment, accurate assessment of prognosis, and provide a new basis for the choice of reasonable treatment options for cervical cancer patients.Material and methodsQRT-PCR was employed to investigate the expression of lncRNA TP73-AS1 in cervical cancer tissues and cell lines. COX multivariate analysis showed the relationship between TP73-AS1 expression and clinicopathological features of patients with cervical cancer. Colony formation and MTT assay detected the effect of TP73-AS1 on proliferation of cervical cancer cells. The effect of TP73-AS1 on migration and invasion of cervical cancer cells was determined by the wound-healing assay and transwell assay. Western blot was performed to assess the expression of EMT markers.ResultsThis study showed that lncRNA TP73-AS1 was up-regulated in cervical cancer tissues and cell lines (p < 0.001), and high expression of TP73-AS1 could be considered as an independent prognostic factor (p < 0.05). Moreover, lncRNA TP73-AS1 promotes cervical cancer cell migration and invasion, and knockdown of TP73-AS1 inhibits the growth of cervical cancer cells (p < 0.001).ConclusionsOur results indicated that lncRNA TP73-AS1 was up-regulated in cervical cancer tissues and cell lines, predicting poor prognosis of cervical cancer and regulating cell proliferation and migration.     

lncRNA PSMA3-AS1 靶向 miR-3619-5p 调控宫颈癌 SiHa 细胞增殖、迁移及侵袭的分子机制研究

目的 探讨 lncRNA PSMA3-AS1 调控宫颈癌细胞增殖、 迁移及侵袭的分子机制。 方法 收集 2020 年 3 月至 2021 年 6 月西安医学院第二附属医院收治的 42 例宫颈癌患者的癌组织及其癌旁组织标本, 采用 qRT-PCR 法检测宫颈癌组织、 癌旁组织、 人宫颈上皮永生化细胞 H8、 与人宫颈癌细胞系 SiHa、 HeLa、 Caski 中 lncRNA PSMA3-AS1、 miR-3619-5p 的表达量; 以 SiHa 细胞为研究对象, 分组为: si-NC 组、 si-lncRNA PSMA3-AS1 组、 miR-NC 组、 miR-3619-5p 组、 anti-miR-NC + si-lncRNA PSMA3-AS1 组、 anti-miR-3619-5p + si-lncRNA PSMA3-AS1 组; MTT 法与 Transwells 实验分别检测每组 SiHa 细胞的增殖活力、 迁移及侵袭能力; 双 荧光素酶报告实验检测 miR-3619-5p 过表达对野生型载体 lncRNA PSMA3-AS1-WT、 突变型载体 lncRNA PSMA3-AS1-MUT 荧光素酶活性的影响; Western 印迹检测 MMP2、 MMP9 蛋白表达量。 结果 宫颈癌组织中 lncRNA PSMA3-AS1 的表达量比癌旁组织增加 ( P < 0. 01), miR-3619-5p 的表达量比癌旁组织减少 ( P < 0. 01); 与 H8 细胞比较, SiHa、 HeLa、 Caski 细胞中 lncRNA PSMA3-AS1 的表达量升高 (P< 0. 01), miR-3619-5p 的表达量降低 (P< 0. 01); 与 si-NC 组比较, si-lncRNA PSMA3-AS1 组细胞活力和 MMP2、 MMP9 蛋 白水平降低 (P< 0. 05), 迁移及侵袭细胞数减少 (P< 0. 05); 与 miR-NC 组比较, miR-3619-5p 组细胞活力 和 MMP2、 MMP9 蛋白水平降低 (P< 0. 01), 迁移及侵袭细胞数减少 (P< 0. 05); miR-3619-5p 过表达可抑 制 lncRNA PSMA3-AS1-WT 的荧光素酶活性 (P< 0. 01), 而未能影响 lncRNA PSMA3-AS1-MUT 的荧光素酶活 性; 与 anti-miR-NC + si-lncRNA PSMA3-AS1 组比较, anti-miR-3619-5p + si-lncRNA PSMA3-AS1 组细胞活力和 MMP2、 MMP9 蛋白水平升高 (P< 0. 01), 迁移及侵袭细胞数增多 (P< 0. 01)。 结论 干扰 lncRNA PSMA3- AS1 表达可通过促进 miR-3619-5p 而降低宫颈癌细胞增殖、 迁移及侵袭能力。     

Long non-coding RNA DLGAP1-AS1 promotes the progression of gastric cancer via miR-515-5p/MARK4 axis

Long non-coding RNA (lncRNA) is an essential regulator of carcinogenesis and cancer progression. In the study, we explored the role of lncRNA DLGAP1-AS1 in gastric cancer (GC). qRT-PCR was carried out to detect DLGAP1-AS1 expression in GC tissues and cell lines. CCK-8 assay, EdU assay, and transwell experiments were employed to detect the malignant biological behaviors of GC cells with DLGAP1-AS1 knockdown or overexpression. Bioinformatics and dual-luciferase report assay were used to confirm the binding relationship between DLGAP1-AS1 and miR-515-5p. MARK4 expression was detected by western blot after DLGAP1-AS1/miR-515-5p was selectively regulated. DLGAP1-AS1 was up-regulated in GC tissues and cell lines, and its high expression was closely associated with larger tumor size, higher TNM stage, and lymph node metastasis. Furthermore, DLGAP1-AS1 overexpression enhanced cell proliferation, migration, and invasion, and miR-515-5p could reverse these effects. DLGAP1-AS1 participated in the regulation of the MARK4 signaling pathway by targeting miR-515-5p. DLGAP1-AS1 promoted GC progression through miR-515-5p/MARK4 signaling pathway.     

LncRNA NCK1-AS1 promotes non-small cell lung cancer progression via regulating miR-512-5p/p21 axis

ObjectiveThis study aimed at probing into the effect of lncRNA NCK1-AS1 on proliferation, migration and invasion of non-small cell lung cancer (NSCLC) cells and its regulatory function on miR-512-5p/p21 molecular axis.MethodsQuantitative real-time polymerase chain reaction (qRT-PCR) was used to assess the expressions of NCK1-AS1 and miR-512-5p in NSCLC tissues and cell lines. The alterations of cell proliferation, migration, invasion and cell cycle were examined by cell counting kit-8 (CCK-8) assay, BrdU experiment, Transwell experiment and flow cytometry, respectively. The dual-luciferase reporter assay and RNA immunoprecipitation experiment were performed to validate the binding relationships between miR-512-5p and NCK1-AS1, and miR-512-5p the 3'UTR of p21 mRNA. Western blot was used to determine the effects of NCK1-AS1 and miR-512-5p on p21 protein expression.ResultsNCK1-AS1 expression was up-regulated in NSCLC tissues and cells, and its high expression was correlated with shorter overall survival time and faster progression of patients. Overexpression of NCK1-AS1 promoted NSCLC cell proliferation, migration and invasion, and accelerated the cell cycle, whereas NCK1-AS1 siRNA inhibited these malignant biological behaviors, and arrested cell cycle. NCK1-AS1 could bind to miR-512-5p, p21 was verified as a target gene of miR-512-5p, and NCK1-AS1 could up-regulate the expression of p21 in NSCLC cells via repressing miR-512-5p expression.ConclusionNCK1-AS1 promotes NSCLC progression by regulating miR-512-5p/p21 molecular axis.     

lncRNA HOXA11-AS对膀胱尿路上皮癌细胞增殖、迁移、侵袭的影响及其机制研究

目的:研究lncRNA HOXA11-反义RNA(HOXA11-AS)对膀胱尿路上皮癌J82细胞增殖、侵袭迁移的影响及与微小RNA-515-5p(miR-515-5p)之间的调控关系.方法:qRT-PCR检测膀胱尿路上皮癌组织、癌旁组织和J82细胞中HOXA11-AS和miR-515-5p的转录水平,MTT法和Tran...     

lncRNA CERS6-AS1 通过调控 miR-138-2-3p 抑制人胶质瘤细胞系增殖

目的 探讨 lncRNA CERS6-AS1 对胶质瘤细胞生物学行为的影响及其可能作用机制。 方法 qRT-PCR 法检测胶质瘤组织、 癌旁组织中 CERS6-AS1 和 miR-138-2-3p 的表达量; Pearson 法分析胶质瘤组织中 CERS6-AS1 与 miR-138-2-3p 表达量的相关性; 体外培养人胶质瘤细胞 T98G, 将 si-NC、 si-CERS6-AS1、 miR-NC、 miR-138-2-3p mimics、 si-CERS6-AS1 与 anti-miR-NC、 si-CERS6-AS1 与 anti-miR-138-2-3p 分 别 转 染 至 T98G 细胞; CCK-8 法、 平板克隆形成实验、 Transwell 小室实验分别检测细胞增殖、 克隆形成、 迁移及侵袭 能力; 双荧光素酶报告基因实验检测 CERS6-AS1 和 miR-138-2-3p 的靶向关系。 结果 与癌旁组织比较, 胶 质瘤组织中 CERS6-AS1 的表达量升高 (P< 0. 05), miR-138-2-3p 的表达量降低 (P< 0. 05); CERS6-AS1 与 miR-138-2-3p 呈负相关 (r = - 0. 8899, P< 0. 001); si-CERS6-AS1 组细胞活力、 克隆形成细胞数、 迁移及侵 袭细胞数均低于 si-NC 组 (P< 0. 05); CERS6-AS1 可靶向调节 miR-138-2-3p 的表达; miR-138-2-3p 组细胞活 力、 克隆形成细胞数、 迁移及侵袭细胞数均少于 miR-NC 组 (P< 0. 05); si-CERS6-AS1 + anti-miR-138-2-3p 组细胞活力、 克隆形成细胞数、 迁移及侵袭细胞数均比 si-CERS6-AS1 + anti-miR-NC 组增多 (P< 0. 05)。 结论 干扰 CERS6-AS1 表达可通过调控 miR-138-2-3p 而抑制胶质瘤细胞增殖、 克隆形成、 迁移及侵袭。     

RETRACTED: Long noncoding RNA TUG1 facilitates cell ovarian cancer progression through targeting MiR-29b-3p/MDM2 axis

Ovarian cancer (OC) is one of the most aggressive female cancers in the world. OC trends to be diagnosed at an advanced stage with abdominal metastasis. Our study explored the biological function and underlying mechanism of lncRNA on OC cell proliferation and migration. The expression of turine up-regulated gene 1 (TUG1) in human OC tissues and cell lines was measured by qRT-PCR. OC cell proliferation, viability, migration, and invasion were measured by MTT assays, colony formation assays, and transwell assays in vitro. Furthermore, the nude mice xenograft model was established to determine the effects of TUG1 in vivo. The relationship between TUG1 and miR-29b-3p, as well as miR-29b-3p and MDM2 were identified using the luciferase reporter assays. We showed that the expression of TUG1 and MDM2 were significantly increased, but the expression of miR-29b-3p was remarkably decreased in OC tissues and cell lines. Knockdown of TUG1 strongly inhibited the ability of cell proliferation, colony formation, migration, and invasion in vitro. The relationship between TUG1 and miR-29b-3p, or miR-29b-3p and MDM2 were predicted by StarBase and miRanda online software. Besides, miR-29b-3p reversed the positive effect of TUG1 on the OC cell proliferation, migration, and invasion through inhibiting MDM2 expression and increasing p53 phosphorylation level. Moreover, knockdown of TUG1 suppressed tumor growth in vivo. Taken all together, this study shows that TUG1 plays a crucial oncogenic role and facilitates cell proliferation, migration, and invasion in OC through regulating miR-29b-3p/MDM2 axis.     

LncRNA UCA1 sponges miR-204-5p to promote migration,invasion and epithelial-mesenchymal transition of glioma cells via upregulation of ZEB1

Long non-coding RNA urothelial carcinoma associated 1 (lncRNA UCA1) promotes cancer progression and enhances chemoresistance through miR-204-5p in a few cancers. However, no studies have investigated whether UCA1 regulates glioma metastasis through miR-204-5p and its target. In the present study, cell migration, invasion and epithelial-mesenchymal transition (EMT) were evaluated in glioma cells overexpressing UCA1. The relationships among UCA1, miR-204-5p and ZEB1 were examined by real-time PCR, western blotting and dual-luciferase reporter assays. The effect of UCA1 knockdown on xenograft tumor growth was investigated. The levels of miR-204-5p, fibronectin, COL5?A1 and ZEB1 in tumor tissues were also determined. The results showed that UCA1 overexpression promoted cell migration, invasion and EMT. UCA1 interacted with miR-204-5p and decreased its level. ZEB1 was identified as a direct target of miR-204-5p and miR-204-5p negatively regulated ZEB1 expression. Moreover, UCA1 sponged miR-204-5p and partially rescued the inhibitory effect of miR-204-5p on ZEB1. In our in vivo studies, UCA1 knockdown reduced tumor volume and tumor weight. In addition, the levels of fibronectin, COL5?A1 and ZEB1 were decreased, while miR-204-5p level was increased. The present study provides the first evidence that UCA1 promotes glioma metastasis through the miR-204-5p/ZEB1 axis, contributing to the understanding of the pathogenesis of glioma.     

miR-5193, regulated by FUT1, suppresses proliferation and migration of ovarian cancer cells by targeting TRIM11

Ovarian cancer is the most lethal gynecological malignancy worldwide. A better understanding of the pathogenesis of ovarian cancer may help to improve the overall survival. Our previous studies have demonstrated that alpha-(1,2)-fucosyltransferase 1 (FUT1) is an oncogenic glycogene in ovarian cancer. However, the underlying mechanism is not fully clarified. In this study, we identified a microRNA as an important downstream regulator for the carcinogenic effect of FUT1 in ovarian cancer. miR-5193 was found down-regulated in ovarian cancer cells, FUT1-overexpression ovarian cancer cells and ovarian tumor samples. MTT, flow cytometry and Transwell assays demonstrated that miR-5193 inhibited the proliferation and migration, and induced the cell cycle arrest and apoptosis of ovarian cancer cells. Real-time PCR and western blot assays showed that miR-5193 downregulated the expression of TRIM11 and upregulated the expression of p53 and p21. Dual luciferase reporter assay indicated that TRIM11 was a direct target of miR‑5193. Rescue experiments confirmed that miR-5193 functioned in ovarian cancer cells by directly targeting TRIM11. Moreover, transfection with miR-5193 mimic in FUT1-overexpression ovarian cancer cells reversed the carcinogenic effect of FUT1. Taken together, our results suggest that miR-5193 is an essential suppressor of human ovarian cancer development, and is an important downstream regulator regarding the carcinogenesis of FUT1 in ovarian cancer.     

Decreased expression of lncRNA GAS5 predicts a poor prognosis in cervical cancer

Introduction: Cervical cancer is the second leading cause of cancer morbidity and mortality for women around the world. Long non-coding RNAs (lncRNAs) have been investigated as a new class of regulators of cellular processes, such as cell growth, apoptosis, and carcinogenesis. Although downregulation of lncRNA GAS5 in several cancers has been studied, its role in cervical cancer remains unknown. The aim of this study is to investigate the expression, clinical significance and biological role in cervical cancer. Methods: Expression of GAS5 was analyzed in cervical cancer tissues by quantitative Real-time PCR (qRT-PCR). And its association with overall survival of patients was analyzed by statistical analysis. Small interfering RNA (siRNA) was used to suppress GAS5 expression in cervical cancer cells. In vitro assays were performed to further explore the biological functions of GAS5 in cervical cancer. Results: We found that GAS5 expression was markedly downregulated in cervical cancer tissues than in corresponding adjacent normal tissues. Decreased GAS5 expression was significantly correlated with FIGO stage, vascular invasion and lymph node metastasis. Moreover, cervical cancer patients with GAS5 lower expression have shown significantly poorer overall survival than those with higher GAS5 expression. And GAS5 expression was an independent prognostic marker of overall survival in a multivariate analysis. In vitro assays our data indicated that knockdown of GAS5 promoted cell proliferation, migration, and invasion. Conclusions: Our study presents that lncRNA GAS5 is a novel molecule involved in cervical cancer progression, which provide a potential prognostic biomarker and therapeutic target.     

Long non-coding RNA OIP5-AS1 promotes cell proliferation and aerobic glycolysis in gastric cancer through sponging miR-186

IntroductionLong non-coding RNAs (lncRNAs) play vital roles in tumour initiation and progression. LncRNA OIP5-AS1 is a potential oncogene in many types of human malignancies, but its biological functions in gastric cancer (GC) remain to be further elucidated.Material and methodsThe expression levels of OIP5-AS1 and miR-186 in GC tissues and cell lines were detected by RT-qPCR analysis. CCK-8 assay and colony formation assay were performed to investigate the proliferation of GC cells in vitro, and a nude mouse tumour model was established to validate the role of OIP5-AS1 in GC tumorigenesis in vivo. The glucose consumption and lactate production of GC cells were detected by ELISA assay. Interaction between OIP5-AS1 and miR-186 was determined using dual luciferase reporter assay.ResultsThe results demonstrated that OIP5-AS1 was upregulated in GC tissues and cell lines and that its high expression was notably correlated with aggressive clinicopathological features of GC patients. Functionally, knockdown of OIP5-AS1 inhibited GC cell proliferation and enhanced cell apoptosis in vitro, and inhibited GC xenograft growth in vivo. In addition, knockdown of OIP5-AS1 reduced the glucose consumption and lactate production in GC cells. In particular, OIP5-AS1 may function as a ceRNA for miR-186, and inhibition of miR-186 blocks the effects of OIP5-AS1 knockdown on aerobic glycolysis in GC cells.ConclusionsAccordingly, our findings suggested that the OIP5-AS1/miR-186 axis might be considered as a potential therapeutic target for GC patients.     

LncRNA PCAT6: A potential biomarker for diagnosis and prognosis of bladder cancer

BackgroundMany potential biomarkers have been identified and studied for bladder cancer diagnosis. In this study, we investigated the role of a new biomarker, long noncoding RNA (lncRNA) PCAT6, in bladder cancer diagnosis and prognosis.Methods and resultsThe lncRNA PCAT6 expression profile of BC is analyzed using the Cancer Genome Atlas Urothelial Bladder Carcinoma (TCGA-BLCA) data. PCAT6 expression level in 106 pairs of BC tissues and adjacent normal tissues was detected and compared using qRT-PCR. Then, the association between PCAT6 expression and clinicopathologic indicators of BC was evaluated. Meanwhile, the prognostic value of PCAT6 was tested using Kaplan-Meier analysis. Additionally, loss-of-function assays were used to explore the effect of PCAT6 on the biological function of BC cells.We identified that the expression level of PCAT6 in BC tissue was higher than that in adjacent normal tissues. And the BC patients have higher serum PCAT6 than that in healthy volunteers. In addition, the expression level of PCAT6 was correlated with tumor size (p = 0.005), differentiation (p = 0.018), TNM stage (p = 0.04), lymph nodes metastasis (p = 0.019), and distant metastasis (p = 0.028). Kaplan-Meier analysis showed that BC patients with high PCAT6 expression had shorter overall survival (OS) and progression-free survival (PFS). The loss-of-function results revealed that the proliferation and viability of BC cells in PCAT6 knockdown groups decreased significantly, compared with the negative control groups.ConclusionOur results demonstrated that PCAT6 might be a potential biomarker for diagnosis and prognosis of BC.     

Circular RNA circ_ASAP2 promotes cell viability,migration, and invasion of gastric cancer cells by regulating the miR-770-5p/CDK6 axis

Background: Gastric cancer (GC) is one of the most common causes of cancer death. {"type":"entrez-geo","attrs":{"text":"GSE83521","term_id":"83521"}}GSE83521 microarray analysis suggested that circular RNA circ_ASAP2 (hsa_circ_0008768) expression was increased in GC tissues. However, the molecular mechanism of circ_ASAP2 remains unknown. Methods: Expression levels of circ_ASAP2, microRNA-770-5p (miR-770-5p), and the cyclin-dependent kinase 6 (CDK6) were detected by using real time PCR (RT-PCR). 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) and transwell assays were applied to explore cell viability, migration, and invasion, respectively. The interactions between miR-770-5p and circ_ASAP2 or CDK6 was predicted by using Starbase software, and then confirmed by luciferase reporter assay. Xenograft tumor model was also used to estimate the effect of circ_ASAP2 on tumor growth in vivo. Results: The expression levels of circ_ASAP2 and CDK6 were increased, and miR-770-5p level was decreased in GC tissues and cells. Furthermore, circ_ASAP2 knockdown inhibited cell viability, migration, and invasion of GC cells. Mechanically, circ_ASAP2 functioned as a sponge of miR-770-5p to regulate CDK6 expression, thereby boosting the progression of GC cells. Circ_ASAP2 silencing hindered the tumor growth of GC in vivo. Conclusion: Circ_ASAP2 knockdown can repress the development of GC cells partly through regulating the miR-770-5p/CDK6 axis, suggesting an underlying circRNA-targeted therapy for GC treatment.     

LncRNA TMPO-AS1 up-regulates the expression of HIF-1α and promotes the malignant phenotypes of retinoblastoma cells via sponging miR-199a-5p

BackgroundLong non-coding RNA (lncRNA) TMPO antisense RNA 1 (TMPO-AS1) is reported to be oncogenic in prostate cancer and lung cancer. This study aims to investigate the expression and biological function of it in retinoblastoma (RB), and explore its regulatory role for miR-199a-5p and hypoxia-inducible factor-1α (HIF-1α).MethodsPaired RB samples were collected, and the expression levels of TMPO-AS1, miR-199a-5p and HIF-1α were examined by quantitative real-time polymerase chain reaction (qRT-PCR); TMPO-AS1 overexpressing plasmids and TMPO-AS1 shRNA were transfected into HXO-RB44 and SO-Rb50 cell lines respectively, and then proliferation, migration and invasion of RB cells were detected by CCK-8 assay and Transwell method. qRT-PCR and western blot were used to analyze the regulatory function of TMPO-AS1 on miR-199a-5p and HIF-1α; luciferase reporter gene assay was used to determine the regulatory relationship between miR-199a-5p and TMPO-AS1.ResultsTMPO-AS1 was significantly up-regulated in cancerous tissues of RB samples (relatively expression: 2.97 vs 3.93, p < 0.001), negatively correlated with miR-199a-5p (r=-0.4813, p < 0.01). There was one binding site on TMPO-AS1 for miR-199a-5p. After transfection of TMPO-AS1 shRNAs into RB cells, the proliferation, migration and invasion of cancer cells was significantly inhibited, while TMPO-AS1 had opposite effects; TMPO-AS1 was also demonstrated to regulate the expression of HIF-1α on both mRNA and protein levels via negatively regulating miR-199a-5p.ConclusionTMPO-AS1 is abnormally up-regulated in RB tissues, and it can modulate the proliferation and migration of RB cells. It has the potential to be the “ceRNA” to regulate HIF-1α expression by sponging miR-199a-5p.     

Long non-coding RNA LINC01296 promotes progression of oral squamous cell carcinoma through activating the MAPK/ERK signaling pathway via the miR-485-5p/PAK4 axis

IntroductionLong intergenic non-protein-coding RNA 1296 (LINC01296), a newly identified lncRNA, can function as an oncogenic driver to promote the development of multiple carcinomas. However, the effect of LINC01296 on oral squamous cell carcinoma (OSCC) is still unclear.Material and methodsWe determined the expression and role of LINC01296 in OSCC tissues and cell lines. The cell viability, migration and invasion were determined by MTT, wound healing assay and transwell assay, respectively. Flow cytometry was used for detecting cell cycle and apoptosis. The interaction and association between LINC01296, microRNA-485-5p (miR-485-5p) and p21 (RAC1) activated kinase 4 (PAK4) were analyzed by RNA immunoprecipitation (RIP) and luciferase reporter assays. The xenograft mouse model was established to detect the effect of LINC01296 on OSCC tumor growth.ResultsOur study showed that LINC01296 was over-expressed in OSCC tissues and cell lines. The level of LINC01296 was positively correlated with the patient’s tumor node metastasis (TNM) stage and nodal invasion. Knockdown of LINC01296 effectively inhibits cell viability, migration and invasion but promotes cell apoptosis in vitro. The in vivo experiment showed that LINC01296 knockdown inhibited OSCC tumor growth. The following analysis indicated that LINC01296 acted as a ceRNA for miR-485-5p, and PAK4 was identified as a direct target of miR-485-5p. Furthermore, we found that the effects of LINC01296 on OSCC progression were through regulating the expression of PAK4/p-MEK/p-ERK via sponging miR-485-5p.ConclusionsLINC01296 promote the cell cycle, proliferation, migration and invasion, and inhibit apoptosis of OSCC cells through activating the MAPK/ERK signaling pathway via sponging miR-485-5p to regulate PAK4 expression. These results suggested that the LINC01296/miR-485-5p/PAK4 axis was closely associated with OSCC progression. Our study provides a new insight into the molecular pathogenesis of OSCC, and may supply novel biomarkers for diagnosis and therapy of OSCC.     

MiR-449a suppresses cell migration and invasion by targeting PLAGL2 in breast cancer

Background

Breast cancer is one of the most common malignancies worldwide. However, the detailed molecular mechanisms underlying breast cancer metastasis are still incompletely clear. MicroRNAs (miRNAs) play a crucial role in cancer metastasis. In this study, we aimed to analyze the expression and function of miR-449a in breast cancer.