LncRNA FGD5-AS1 promotes the malignant phenotypes of ovarian cancer cells via targeting miR-142-5p

Apoptosis - Long non-coding RNAs (lncRNAs) have been reported to participate in regulating gene expression and are related to tumor progression. FGD5 antisense RNA 1 (FGD5-AS1) facilitates the...     

LncRNA PAPAS promotes hepatocellular carcinoma by interacting with miR-188-5p

It has been observed that long noncoding RNA (lncRNA) PAPAS regulates rRNA synthesis, but its role in human diseases is unclear. Our study was carried out to investigate the role of PAPAS in hepatocellular carcinoma (HCC). In the present study, we found that PAPAS was upregulated both in plasma from patients with HCC and tumors compared with plasma from healthy people and tumor-adjacent healthy tissues. Expression levels of PAPAS in tumor tissues and plasma of patients with HCC were significantly and positively correlated. Plasma levels of PAPAS effectively distinguished stage I patients from healthy controls. MicroRNA (miR)-188-5p was downregulated in tumor tissues than in tumor-adjacent healthy tissues of patients with HCC, and was inversely correlated with PAPAS in tumor tissues but not in adjacent healthy tissues. PAPAS and miR-188-5p downregulated each other. PAPAS overexpression promoted, while miR-188-5p overexpression inhibited the HCC cell proliferation. Rescue experiment showed that miR-34a overexpression attenuated the effects of PAPAS overexpression. However, PAPAS overexpression failed to affect significantly cancer cell migration and invasion. Therefore, lncRNA PAPAS promotes HCC by interacting with miR-188-5p.     

LncRNA CRNDE promotes cell proliferation,migration and invasion of ovarian cancer via miR-423-5p/FSCN1 axis

Ovarian cancer seriously threatens the health of women. LncRNA CRNDE is known to be upregulated in ovarian cancer. However, the mechanism by which CRNDE regulates the progress of ovarian cancer is largely unknown. MTT assay was applied to measure the cell viability. Colony formation assay was used to measure the cell proliferation. Cell migration was tested by wound healing, and Transwell assay was performed to detect cell invasion. In addition, the expression of miR-423-5p, CRNDE and FSCN1 were detected by RT-qPCR and western blotting, respectively. Meanwhile, dual-luciferase reporter assay and RIP assay were performed to explore the correlation between miR-423-5p and CRNDE (or FSCN1). CRNDE and FSCN1 were upregulated in ovarian cancer cells (SKOV3, CAOV-3, IGROV1, A2780 and C13K), while miR-423-5p was downregulated. Moreover, silencing of FSCN1/CRNDE significantly decreased proliferation, migration and invasion of ovarian cancer cells (SKOV3 and CI3K) via suppressing MMP-2 and MMP-9. In addition, CRNDE could sponge miR-423-5p, and FSCN1 was confirmed to be the direct target of miR-423-5p. Furthermore, CRNDE knockdown-induced inhibition of FSCN1 was notably reversed by miR-423-5p downregulation. Knockdown of CRNDE inhibited cell proliferation, migration and invasion of ovarian cancer via miR-423-5p/FSCN1 axis. Thus, CRNDE may serve a new target for ovarian cancer.

     

LncRNA AC130710通过miR-129-5P/WNT4轴促进子宫内膜癌细胞增殖和上皮间质转化

目的探讨LncRNA AC130710通过miR-129-5P/WNT4轴对子宫内膜癌细胞（HEC-1A细胞）增殖、凋亡及上皮间质转化（EMT）的影响及机制研究。 方法通过实时荧光定量PCR检测LncRNA AC130710、miR-129-5P和WNT4在子宫内膜癌细胞（HEC-1A细胞）和人子宫内膜上皮细胞（HEEC）中的表达。细胞分别转染（1）siRNA NC、AC130710 siRNA、WNT4 siRNA;（2）inhibitor NC、miR-129-5P inhibitor;（3）pcDNA-3.1 （+）+mimics NC、pcDNA-AC130710+mimics NC、pcDNA-3.1 （+）+miR-129-5P mimics、pcDNA-AC130710+miR-129-5P mimics。MTT实验检测LncRNA AC130710、miR-129-5P和WNT4的表达对HEC-1A细胞增殖能力的影响;Western blot检测LncRNA AC130710、miR-129-5P和WNT4的表达对HEC-1A细胞凋亡相关蛋白B淋巴细胞瘤-2基因相关蛋白X （Bax）、剪切的半胱氨酰天冬氨酸特异性蛋白酶-3 （cleaved caspase-3）、cleaved caspase-9和B淋巴细胞瘤-2基因（Bcl-2）表达的影响;Western blot检测LncRNA AC130710、miR-129-5P和WNT4的表达对HEC-1A细胞EMT的影响。miRanda和双荧光素酶报告基因实验分析LncRNA AC130710和miR-129-5P之间的关系,TargetScan数据库分析miR-129-5P与WNT4的相关性,双荧光素酶报告基因检测miR-129-5P与WNT4的相互作用;RT-qPCR法检测LncRNA AC130710通过miR-129-5P对WNT4表达的影响。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LSD-t检验。 结果与HEEC细胞比较,HEC-1A细胞中AC130710表达水平（1.86±0.21比0.85±0.06）、WNT4表达水平（1.88±0.26比1.08±0.12）升高;HEC-1A细胞中miR-129-5P表达水平（0.89±0.16比1.76±0.08）降低。与转染siRNA NC比较,转染AC130710 siRNA细胞内Bax、cleaved caspase-3、cleaved caspase-9、E-cadherin蛋白相对表达水平[（1.37±0.14比0.84±0.21）,（1.08±0.16比0.37±0.07）,（1.26±0.24比0.39±0.06）,（1.87±0.17比1.32±0.26）]上升,Bcl-2、N-cadherin、Snail和Vimentin蛋白相对表达水平[（0.38±0.08比1.18±0.14）,（0.36±0.04比0.85±0.24）,（0.35±0.09比1.12±0.18）,（0.42±0.10比1.26±0.27）]下降;与转染inhibitor NC比较,转染miR-129-5P inhibitor细胞的Bcl-2、N-cadherin、Snail和Vimentin蛋白相对表达水平[（0.98±0.07比0.65±0.08）,（1.39±0.15比0.68±0.09）,（0.95±0.08比0.42±0.06）,（1.16±0.16比0.54±0.02）]上升,Bax、cleaved caspase-3、cleaved caspase-9、E-cadherin蛋白相对表达水平[（0.27±0.09比0.85±0.13）,（0.48±0.05比1.16±0.28）,（0.52±0.14比1.19±0.15）,（0.43±0.09比1.08±0.26）]下降;与转染siRNA NC比较,转染WNT4 siRNA细胞的Bcl-2、N-cadherin、Snail和Vimentin蛋白相对表达水平[（0.23±0.08比0.84±0.12）,（0.28±0.09比1.14±0.17）,（0.42±0.23比1.06±0.15）,（0.35±0.08比1.13±0.08）]降低,Bax、cleaved caspase-3、cleaved caspase-9、E-cadherin蛋白相对表达水平[（0.96±0.12比0.42±0.08）,（1.13±0.25比0.45±0.06）,（1.54±0.23比0.72±0.12）,（1.87±0.24比1.26±0.18）]上升。 结论LncRNA AC130710可通过miR-129-5P/WNT4轴调控子宫内膜癌HEC-1A细胞增殖、凋亡及EMT。     

LncRNA H19 promotes keloid formation through targeting the miR-769-5p/EIF3A pathway

Molecular and Cellular Biochemistry - Keloid is a skin disease characterized by fibrous hyperplasia, which is often difficult to cure. Long non-coding RNAs (lncRNAs) have been shown to be...     

LncRNA DANCR promotes cervical cancer progression by upregulating ROCK1 via sponging miR-335-5p

Emerging evidence highlights the key regulatory roles of long noncoding RNAs (lncRNAs) in the initiation and progression of numerous malignancies. The lncRNA identified as differentiation antagonizing nonprotein coding RNA (DANCR) is a novel lncRNA widely involved in the development of multiple human cancers. However, the function of DANCR and its potential molecular mechanism in cervical cancer remain unclear. In this study, we discovered that DANCR was significantly elevated in cervical cancer tissues and cells, and was closely correlated with poor prognosis of cervical cancer patients. In addition, knockdown of DANCR inhibited proliferation, migration, and invasion of cervical cancer cells in vitro, indicating that DANCR functioned as an oncogene in cervical cancer. Moreover, we verified that DANCR could directly bind to miR-335-5p, isolating miR-335-5p from its target gene Rho-associated coiled-coil containing protein kinase 1 (ROCK1). Functional analysis showed that DANCR regulated ROCK1 expression by competitively binding to miR-335-5p. Further cellular behavioral experiments revealed that miR-335-5p mimics and ROCK1 knockdown reversed the effects of upregulated DANCR on proliferation, migration, invasion, and epithelial-mesenchymal transition (EMT) of cervical cancer cells by rescue assays. In summary, this study demonstrated that DANCR promoted cervical cancer progression by functioning as a competing endogenous RNA (ceRNA) to regulate ROCK1 expression via sponging miR-335-5p, suggesting a novel potential therapeutic target for cervical cancer.     

LncRNA lnc-ISG20 promotes renal fibrosis in diabetic nephropathy by inducing AKT phosphorylation through miR-486-5p/NFAT5

Long non-coding RNA (lncRNA) lnc-ISG20 has been found aberrantly up-regulated in the glomerular in the patients with diabetic nephropathy (DN). We aimed to elucidate the function and regulatory mechanism of lncRNA lnc-ISG20 on DN-induced renal fibrosis. Expression patterns of lnc-ISG20 in kidney tissues of DN patients were determined by RT-qPCR. Mouse models of DN were constructed, while MCs were cultured under normal glucose (NG)/high glucose (HG) conditions. The expression patterns of fibrosis marker proteins collagen IV, fibronectin and TGF-β1 were measured with Western blot assay. In addition, the relationship among lnc-ISG20, miR-486-5p, NFAT5 and AKT were analysed using dual-luciferase reporter assay and RNA immunoprecipitation. The effect of lnc-ISG20 and miR-486/NFAT5/p-AKT axis on DN-associated renal fibrosis was also verified by means of rescue experiments. The expression levels of lnc-ISG20 were increased in DN patients, DN mouse kidney tissues and HG-treated MCs. Lnc-ISG20 silencing alleviated HG-induced fibrosis in MCs and delayed renal fibrosis in DN mice. Mechanistically, miR-486-5p was found to be a downstream miRNA of lnc-ISG20, while miR-486-5p inhibited the expression of NFAT5 by binding to its 3'UTR. NFAT5 overexpression aggravated HG-induced fibrosis by stimulating AKT phosphorylation. However, NFAT5 silencing reversed the promotion of in vitro and in vivo fibrosis caused by lnc-ISG20 overexpression. Our collective findings indicate that lnc-ISG20 promotes the renal fibrosis process in DN by activating AKT through the miR-486-5p/NFAT5 axis. High-expression levels of lnc-ISG20 may be a useful indicator for DN.     

LncRNA OGFRP1 promotes cell proliferation and suppresses cell radiosensitivity in gastric cancer by targeting the miR-149-5p/MAP3K3 axis

Journal of Molecular Histology - Gastric cancer (GC) is an aggressive malignancy with high incidence and mortality. Radiotherapy is a common treatment for patients with advanced GC. Many long...     

LncRNA NEAT1 promotes docetaxel resistance in prostate cancer by regulating ACSL4 via sponging miR-34a-5p and miR-204-5p

Docetaxel resistance remains one of the main problems in clinical treatment of metastatic prostate cancer (PCa). Previous studies identified differently expressed lncRNAs in docetaxel-resistant PCa cell lines, while the potential mechanisms were still unknown. In the present study, we found NEAT1 was expressed at high levels in docetaxel-resistant PCa clinical samples and related cell lines. When knockdown NEAT1, cell proliferation and invasion in docetaxel-resistant PCa cells in vitro and in vivo were downregulated. Our further researches explained that NEAT1 exerts oncogenic function in PCa by competitively ‘sponging’ both miR-34a-5p and miR-204-5p. Inhibition of miR-34a-5p or miR-204-5p expression mimics the docetaxel-resistant activity of NEAT1, whereas ectopic expression of miR-34a-5p or miR-204-5p attenuates the anti-drug function of NEAT1 in PCa cells. Besides, we also found ACSL4 is a target of both miR-34a-5p and miR-204-5p, and ACSL4 was also inhibited by miR-34a-5p and miR-204-5p. Moreover, suppression of miR-34a-5p or/and miR-204-5p greatly restrained the expression of ACSL4 upon NEAT1 overexpression. Joint expression of miR-34a-5p and miR-204a-5p synergistically decreased the expression of ASCL4, indicating miR-34a-5p and miR-204a-5p collaboratively inhibit the expression of ACSL4. Innovatively, we concluded that NEAT1 contributes to the docetaxel resistance by increasing ACSL4 via sponging miR-34a-5p and miR-204-5p in PCa cells.     

LncRNA CD27-AS1 promotes acute myeloid leukemia progression through the miR-224-5p/PBX3 signaling circuit

Acute myeloid leukemia (AML) is a hematological malignancy with a low cure rate, especially in the elderly. Previous studies have shown that long non-coding RNA (lncRNA) may be an important factor in the pathogenesis of hematological malignancies, including acute myeloid leukemia (AML). However, the biological roles and clinical significances of most lncRNAs in AML are not fully understood. LncRNA CD27 Antisense RNA 1 (CD27-AS1), as a member of lncRNA family, has rare reports on its function. In present study, we found that the expression of CD27-AS1 examined by quantitative real-time PCR was markedly increased in the AML patients (N = 40) compared with healthy volunteers (N = 40). The overall survival time was significantly shorter in patients with higher CD27-AS1 expression than that in patients with lower CD27-AS1 (P < 0.01). Furthermore, downregulation of CD27-AS1 in AML cells suppressed proliferative ability, arrested cell cycle in G0/G1 phase, and induced apoptosis. However, CD27-AS1 overexpression further enhanced the malignant phenotype of AML cells. Additionally, CD27-AS1 was proved to increase PBX3 expression through sponging miR-224-5p. CD27-AS1 knockdown blocked the MAPK signaling through PBX3 silencing and further inhibited the cell growth of AML cells. Taken together, we demonstrate that CD27-AS1 may be a potential prognostic biomarker of AML, and our finding also provides a new insight for non-coding RNA-based therapeutic intervention of AML.Subject terms: Growth factor signalling, Oncogenesis     

p53/miR-30a-5p/ SOX4 feedback loop mediates cellular proliferation,apoptosis, and migration of non-small-cell lung cancer

Many microRNAs (miRNAs) play vital roles in the tumorigenesis and development of cancers. In this study, we aimed to identify the differentially expressed miRNAs and their specific mechanisms in non-small-cell lung cancer (NSCLC). Based on data from the GSE56036 database, miR-30a-5p expression was identified to be downregulated in NSCLC. Further investigations showed that overexpression of miR-30a-5p inhibited cell proliferation, migration, and promoted apoptosis in NSCLC. Increase of miR-30a-5p level could induce the increase of Bax protein level and decrease of Bcl-2 protein level. In addition, chromatin immunoprecipitation assays showed that miR-30a-5p expression was induced by binding of p53 to the promoter of MIR30A. Bioinformatics prediction indicated that miR-30a-5p targets SOX4, and western blot analysis indicated that overexpression of the miRNA decreases the SOX4 protein expression level, which in turn regulated the level of p53. Thus, this study provides evidence for the existence of a p53/miR-30a-5p/SOX4 feedback loop, which likely plays a key role in the regulation of proliferation, apoptosis, and migration in NSCLC, highlighting a new therapeutic target.