Long Non-coding RNA PCED1B Antisense RNA 1 Promotes Cell Proliferation and Invasion in Hepatocellular Carcinoma by Regulating the MicroRNA-34a/CD44 Axis

Objective This study aimed to examine the role of long non-coding RNA PCED1B antisense RNA 1(PCED1B-AS1)in the development of hepatocellular carcinoma(HCC).Methods A total of 62 pairs of HCC tissues and adjacent non-tumor tissues were obtained from 62 HCC patients.The interactions of PCED1B-AS1 and microRNA-34a(miR-34a)were detected by dual luciferase activity assay and RNA pull-down assay.The RNA expression levels of PCED1B-AS1,miR-34a and CD44 were detected by RT-qPCR,and the protein expression level of CD44 was determined by Western blotting.The cell proliferation was detected by cell proliferation assay,and the cell invasion and migration by transwell invasion assay.The HCC tumor growth after PCED1B-AS1 was downregulated was determined by in vivo animal study.Results PCED1B-AS1 was highly expressed in HCC tissues,which was associated with poor survival of HCC patients.Furthermore,PCED1B-AS1 interacted with miR-34a in HCC cells,but they did not regulate the expression of each other.Additionally,PCED1B-AS1 increased the expression level of CD44,which was targeted by miR-34a.The cell proliferation and invasion assay revealed that miR-34a inhibited the proliferation and invasion of HCC in vitro,while CD44 exhibited the opposite effects.Furthermore,PCED1B-AS1 suppressed the role of miR-34a.Moreover,the knockdown of PCED1B-AS1 repressed the HCC tumor growth in nude mice in vivo.Conclusion PCED1B-AS1 may play an oncogenic role by regulating the miR-34a/CD44 axis in HCC.

Long non-coding RNA GATA6-AS1 is mediated by N6-methyladenosine methylation and inhibits the proliferation and metastasis of gastric cancer

BACKGROUND Through experimental research on the biological function of GATA6-AS1,it was confirmed that GATA6-AS1 can inhibit the proliferation,invasion,and migration of gastric cancer cells,suggesting that GATA6-AS1 plays a role as an anti-oncogene in the occurrence and development of gastric cancer.Further experi-ments confirmed that the overexpression of fat mass and obesity-associated protein(FTO)inhibited the expression of GATA6-AS1,thereby promoting the occurrence and development of gastric cancer.AIM To investigate the effects of GATA6-AS1 on the proliferation,invasion and migration of gastric cancer cells and its mechanism of action.METHODS We used bioinformatics methods to analyze the Cancer Genome Atlas(https://portal.gdc.cancer.gov/.The Cancer Genome Atlas)and download expression data for GATA6-AS1 in gastric cancer tissue and normal tissue.We also constructed a GATA6-AS1 lentivirus overexpression vector which was transfected into gastric cancer cells to investigate its effects on proliferation,migration and invasion,and thereby clarify the expression of GATA6-AS1 in gastric cancer and its biological role in the genesis and development of gastric cancer.Next,we used a database(http://starbase.sysu.edu.cn/starbase2/)to analysis GATA6-AS1 whether by m6A methylation modify regulation and predict the methyltransferases that may methylate GATA6-AS1.Furthermore,RNA immunoprecipitation experiments confirmed that GATA6-AS1 was able to bind to the m6A methylation modification enzyme.These data allowed us to clarify the ability of m6A methylase to influence the action of GATA6-AS1 and its role in the occurrence and development of gastric cancer.RESULTS Low expression levels of GATA6-AS1 were detected in gastric cancer.We also determined the effects of GATA6-AS1 overexpression on the biological function of gastric cancer cells.GATA6-AS1 had strong binding ability with the m6A demethylase FTO,which was expressed at high levels in gastric cancer and negatively correlated with the expression of GATA6-AS1.Following transfection with siRNA to knock down the expression of FTO,the expression levels of GATA6-AS1 were up-regulated.Finally,the proliferation,migration and invasion of gastric cancer cells were all inhibited following the knockdown of FTO expression.CONCLUSION During the occurrence and development of gastric cancer,the overexpression of FTO may inhibit the expression of GATA6-AS1,thus promoting the proliferation and metastasis of gastric cancer.

lncRNA KCNQ1OT1靶向调控miR-132-5p对帕金森病细胞损伤的保护机制

目的探究长链非编码RNA KCNQ1OT1(lncRNA KCNQ1OT1)靶向调控微小RNA-132-5p(miR-132-5p)对帕金森病细胞损伤的保护机制。方法SH-SY5Y细胞通过1-甲基-4-苯基吡啶阳离子(MMP+)诱导建立帕金森病细胞模型,检测SH-SY5Y细胞中lncRNA KCNQ1OT1、miR-132-5p表达、活性氧(ROS)、超氧化物歧化酶(SOD)、丙二醛(MDA)、白介素-1β(IL-1β)、白介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)水平、凋亡率及Bcl-2、Bax蛋白表达,验证lncRNA KCNQ1OT1、miR-132-5p的调控关系。结果与Con组相比,MMP+组lncRNA KCNQ1OT1、miR-132-5p表达量较高(P<0.05)。低表达lncRNA KCNQ1OT1、干扰miR-132-5p表达均可减轻MMP+诱导的SH-SY5Y细胞氧化应激及炎性损伤,抑制细胞死亡,lncRNA KCNQ1OT1靶向正调控miR-132-5p表达,miR-132-5p过表达逆转了lncRNA KCNQ1OT1低表达对MMP+诱导SK-N-SH细胞氧化应激、炎症损伤及凋亡。结论lncRNA KCNQ1OT1通过靶向抑制miR-132-5p表达减轻了MMP+诱导SK-N-SH细胞氧化应激、炎症损伤,抑制了细胞凋亡。

Long noncoding RNA steroid receptor RNA activator 1 inhibits proliferation and glycolysis of esophageal squamous cell carcinoma

BACKGROUND The clinical effects and detailed roles of long non-coding RNA(LncRNA)steroid receptor RNA activator 1(SRA1)in esophageal squamous cell carcinoma(ESCC)remain ambiguous.In the present study,the complementary sites between lncRNA SRA1,miRNA-363-5p,and phospholysine phosphohistidine inorganic pyrophosphate phosphatase(LHPP)predicted via bioinformatics analysis stimulated us to hypothesize that miRNA-363-5p/LHPP axis might be required for SRA1-mediated ESCC progression.AIM To investigate the molecular events of SRA1 in the malignant behavior in ESCC.METHODS Thirty-eight ESCC tissues and paired adjacent normal tissues were acquired.SRA1 expression was detected in ESCC tissues and cell lines using quantitative reverse transcription-polymerase chain reaction.Cell counting Kit-8 assay,transwell invasion assay,glycolysis assay,and xenograft tumor model were performed to address the malignant biological behaviors of ESCC cells after the introduction of SRA1.The t-test and theχ2 test were used for comparison between groups.Survival curve analysis was performed using the Kaplan-Meier method.RESULTS SRA1 downregulation was identified in ESCC.ESCC patients exhibiting a low SRA1 expression faced shorter overall survival than those with a high SRA1 expression.The introduction of SRA1 inhibited cell proliferation,glucose uptake,and lactate production in ESCC.In vivo,the growth of ESCC was hindered by SRA1 overexpression.Then,SRA1 overexpresses the LHPP by inhibiting miRNA-363-5p.Lastly,the introduction of small interfering RNA si-LHPP or miRNA-363-5p mimic could abrogate the inhibition roles triggered by SRA1.CONCLUSION SRA1 inhibits the oncogenicity of ESCC via miRNA-363-5p/LHPP axis.The SRA1/miRNA-363-5p/LHPP pathway may be a therapeutic target for ESCC.

LncRNA AFAP1-AS1 exhibits oncogenic characteristics and promotes gemcitabine-resistance of cervical cancer cells through miR-7-5p/EGFR axis

Background:Drug resistance is the main factor contributing to cancer recurrence and poor prognosis.Exploration of drug resistance-related mechanisms and effective therapeutic targets are the aim of molecular targeted therapy.In our study,the role of long non-coding RNA(lncRNA)AFAP1-AS1 in gemcitabine resistance and related mechanisms were explored in cervical cancer cells.Methods:Gemcitabine-resistant cervical cancer cell lines HT-3-Gem and SW756-Gem were constructed using the gemcitabine concentration gradient method.The overall survival rates and recurrence-free survival rates were evaluated by Kaplan-Meier analysis.The interaction was verified through a Dual-luciferase reporter gene assay and a Biotinylated RNA pull-down assay.Cell proliferation ability was assessed through methyl-thiazolyl-tetrazolium(MTT),soft agar,and colony formation experiments.Cell cycle and apoptosis were detected byflow cytometry.Results:Up-regulation of AFAP1-AS1 in cervical cancer predicted a poor prognosis.Besides,patients in the gemcitabine-resistance group had higher levels of AFAP1-AS1 than the gemcitabine-sensitive group.AFAP1-AS1 promoted tumor growth and induced gemcitabine tolerance of cervical cancer cells.In addition,AFAP1-AS1 mediated epidermal growth factor receptor(EGFR)expression by serving as a molecular sponge for microRNA-7a-5p(miR-7-5p).This present study also proved that the knockdown of EGFR or overexpression of miR-7a-5p abolished the accelerative role of AFAP1-AS1 overexpression in cancer progression and gemcitabine tolerance.Conclusions:In general,the AFAP1-AS1/miR-7-5p/EGFR axis was tightly related to the progression and gemcitabine tolerance of cervical cancer,providing potential targets for the management of cervical cancer.

Role of long non-coding RNAs in non-alcoholic fatty liver disease

Non-alcoholic fatty liver disease(NAFLD)is emerging as a common cause of chronic liver disease in children and adults.NAFLD can progress to steatohepa-titis and potentially even hepatocellular carcinoma.Early identification of pati-ents at risk for progressive disease is crucial for managing NAFLD.Recent studies have identified long noncoding RNAs(lncRNAs),circular RNAs,and microRNAs as playing important roles in the pathogenesis of NAFLD.These noncoding RNAs are involved in modulating several metabolic pathways such as hepatic glucose and lipid metabolism,oxidative stress,and even carcinogenesis.Elevated levels of lncARSR and lncRNA nuclear-enriched abundant transcript 1 have been found in patients with NAFLD.In addition,lncRNAs such as PRYP4-3 and RP11-128N14.5 can distinguish patients with NAFLD from healthy indi-viduals.Increased MEG3 expression has been observed in both NAFLD and non-alcoholic steatohepatitis,suggesting that it may help predict patients at risk for disease progression.With advances in transcriptomics,we may discover additional targets to help in the identification and prognostication of NAFLD.

Value of long non-coding RNA Rpph1 in esophageal cancer and its effect on cancer cell sensitivity to radiotherapy

BACKGROUND Esophageal cancer is a common digestive tract tumor that is generally treated with radiotherapy.Poor responses to radiotherapy in most patients generally result in local radiotherapy failure,so it is essential to find new radiosensitizers that can enhance the response of cancer cells to radiotherapy and improve the survival of esophageal cancer patients with radiation resistance.The long noncoding RNA(lncRNA)Rpph1 is highly expressed in human gastric cancer tissues,and represses breast cancer cell proliferation and tumorigenesis.However,the expression of lncRNA Rpph1 in esophageal cancer and its relationship with radio-sensitivity has not been studied.AIM To explore the value of lncRNA Rpph1 in esophageal cancer and its effect on cancer cell sensitivity to radiotherapy.METHODS Eighty-three patients with esophageal cancer admitted to Qilu Hospital of Shandong University and 90 healthy participants who received physical examinations were collected as research participants.The expression of Rpph1 was determined by qRT-PCR.siRNA-NC and siRNA-Rpph1 were transfected into esophageal cancer cell lines,and cells without transfection were designated as the blank control group.Cell survival was tested by colony formation assays,and the levels of proteins related to apoptosis and epithelial-mesenchymal transitions were determined by Western blot assays.Cell proliferation was assessed by MTT assays,cell apoptosis by flow cytometry,and cell migration by wound-healing assays.Changes in cell cycle distribution were monitored.RESULTS Rpph1 was highly expressed in esophageal carcinoma,making it a promising marker for the diagnosis of esophageal cancer.Rpph1 could also be used to distinguish different short-term responses,T stages,N stages,and clinical stages of esophageal cancer patients.The results of 3-year overall survival favored patients with lower Rpph1 expression over patients with higher Rpph1 expression(P<0.05).In vitro and in vivo experiments showed that silencing Rpph1 expression led to higher sensitivity of esophageal cancer cells to radiotherapy,stronger apoptosis in esophageal cancer cells induced by radiotherapy,higher expression of Bax and caspase-3,and lower expression of Bcl-2(Bax,caspase-3,and Bcl-2 are apoptosis-related proteins).Additionally,silencing Rpph1 attenuated radiation-induced G2/M phase arrest,and significantly inhibited the expression of proteins involved in cell proliferation,migration,and epithelial-mesenchymal transition regulation in esophageal cancer cells.CONCLUSION Rpph1 is highly expressed in esophageal cancer.Silencing Rpph1 expression can promote cell apoptosis,inhibit cell proliferation and migration,and increase radio-sensitivity.

慢性乙型肝炎患者血清β-catenin和lncRNA KCNQ1OT1表达及其在肝纤维化诊断中的应用价值

目的分析β-连环蛋白(β-catenin)、长链非编码RNA(lncRNA)KCNQ1OT1在慢性乙型肝炎患者血清中的表达变化及其在肝纤维化诊断中的应用价值。方法选取2020年1月—2021年1月空军军医大学第一附属医院消化内科收治慢性乙型肝炎患者90例,根据患者的肝纤维化程度分为无肝纤维化23例(S0组)、轻度肝纤维化42例(S1~S2组)、中重度肝纤维化25例(S3~S4组);另选取同期医院健康体检者30例为健康对照组。比较各组血清β-catenin、lncRNA KCNQ1OT1表达水平及肝纤维化指标;分析β-catenin、lncRNA KCNQ1OT1表达水平与肝纤维化程度及其指标的相关性;Logistic回归分析慢性乙型肝炎患者发生肝纤维化的影响因素;受试者工作特征曲线(ROC)分析血清β-catenin、lncRNA KCNQ1OT1水平对慢性乙型肝炎患者发生肝纤维化的预测价值。结果健康对照组、S0组、S1-S2组、S3-S4组血清β-catenin、lncRNA KCNQ1OT1水平依次升高(F/P=28.066/<0.001、25.173/<0.001);肝纤维化指标透明质酸(HA)、前胶原N端肽(PⅢP)、Ⅳ型胶原(CⅣ)、层黏连蛋白(LN)水平逐次升高(F/P=79.414/<0.001、119.630/<0.001、104.574/<0.001、96.631/<0.001)。血清β-catenin、lncRNA KCNQ1OT1水平均与肝纤维化程度呈显著正相关(r/P=0.598/0.001、0.643/0.009),血清β-catenin、lncRNA KCNQ1OT1水平与肝纤维化指标HA、PⅢP、CⅣ、LN呈显著正相关(β-catenin:r/P=0.483/0.016、0.456/0.013、0.641/0.006、0.519/0.008;lncRNA KCNQ1OT1:r/P=0.496/0.014、0.604/0.007、0.523/0.014、0.611/0.002)。血清β-catenin、lncRNA KCNQ1OT1、HA、PⅢP、CⅣ、LN升高是慢性乙型肝炎患者发生肝纤维化的危险因素[OR(95%CI)=1.564(1.205~2.030)、2.213(1.449~3.379)、1.816(1.261~2.615)、2.315(1.380~3.884)、1.564(1.161~2.107)、3.013(1.491~6.090)]。血清β-catenin、lncRNA KCNQ1OT1及二者联合预测慢性乙型肝炎患者发生肝纤维化的AUC为0.784、0.775、0.857,二者联合优于各自单独预测(Z/P=2.617/0.028、2.897/0.014)。结论慢性乙型肝炎患者血清β-catenin、lncRNA KCNQ1OT1水平与肝纤维化程度密切相关,二者联合检测对慢性乙型肝炎患者是否发生肝纤维化有较好参考价值。

Effects of long non-coding RNA Opa-interacting protein 5 antisense RNA 1 on colon cancer cell resistance to oxaliplatin and its regulation of micro RNA-137

BACKGROUND The incidence of colon cancer(CC)is currently high,and is mainly treated with chemotherapy.Oxaliplatin(L-OHP)is a commonly used drug in chemotherapy;however,long-term use can induce drug resistance and seriously affect the prognosis of patients.Therefore,this study investigated the mechanism of Opainteracting protein 5 antisense RNA 1(OIP5-AS1)on L-OHP resistance by determining the expression of OIP5-AS1 and micro RNA-137(miR-137)in CC cells and the effects on L-OHP resistance,with the goal of identifying new targets for the treatment of CC.AIM To study the effects of long non-coding RNA OIP5-AS1 on L-OHP resistance in CC cell lines and its regulation of miR-137.METHODS A total of 114 CC patients admitted to China-Japan Union Hospital of Jilin University were enrolled,and the expression of miR-137 and OIP5-AS1 in tumor tissues and corresponding normal tumor-adjacent tissues was determined.The influence of OIP5-AS1 and miR-137 on the biological behavior of CC cells was evaluated.Resistance to L-OHP was induced in CC cells,and their activity was determined and evaluated using cell counting kit-8.Flow cytometry was used to analyze the apoptosis rate,Western blot to determine the levels of apoptosisrelated proteins,and dual luciferase reporter assay combined with RNA-binding protein immunoprecipitation to analyze the relationship between OIP5-AS1 and miR-137.RESULTS OIP5-AS1 was up-regulated in CC tissues and cells,while miR-137 was downregulated in CC tissues and cells.OIP5-AS1 was inversely correlated with miR-137(P<0.001).Silencing OIP5-AS1 expression significantly hindered the proliferation,invasion and migration abilities of CC cells and markedly increased the apoptosis rate.Up-regulation of miR-137 expression also suppressed these abilities in CC cells and increased the apoptosis rate.Moreover,silencing OIP5-AS1 and up-regulating miR-137 expression significantly intensified growth inhibition of drug-resistant CC cells and improved the sensitivity of CC cells to LOHP.OIP5-AS1 targetedly inhibited miR-137 expression,and silencing OIP5-AS1 reversed the resistance of CC cells to L-OHP by promoting the expression of miR-137.CONCLUSION Highly expressed in CC,OIP5-AS1 can affect the biological behavior of CC cells,and can also regulate the resistance of CC cells to L-OHP by mediating miR-137 expression.

Basic Study Long non-coding RNA TP73-AS1 promotes pancreatic cancer growth and metastasis through miRNA-128-3p/GOLM1 axis

BACKGROUND Previous studies have suggested that long non-coding RNAs(lncRNA)TP73-AS1 is significantly upregulated in several cancers.However,the biological role and clinical significance of TP73-AS1 in pancreatic cancer(PC)remain unclear.AIM To investigate the role of TP73-AS1 in the growth and metastasis of PC.METHODS The expression of lncRNA TP73-AS1,miR-128-3p,and GOLM1 in PC tissues and cells was detected by quantitative real-time polymerase chain reaction.The bioinformatics prediction software ENCORI was used to predict the putative binding sites of miR-128-3p.The regulatory roles of TP73-AS1 and miR-128-3p in cell proliferation,migration,and invasion abilities were verified by Cell Counting Kit-8,wound-healing,and transwell assays,as well as flow cytometry and Western blot analysis.The interactions among TP73-AS1,miR-128-3p,and GOLM1 were explored by bioinformatics prediction,luciferase assay,and Western blot.RESULTS The expression of TP73-AS1 and miRNA-128-3p was dysregulated in PC tissues and cells.High TP73-AS1 expression was correlated with a poor prognosis.TP73-AS1 silencing inhibited PC cell proliferation,migration,and invasion in vitro as well as suppressed tumor growth in vivo.Mechanistically,TP73-AS1 was validated to promote PC progression through GOLM1 upregulation by competitively binding to miR-128-3p.CONCLUSION Our results demonstrated that TP73-AS1 promotes PC progression by regulating the miR-128-3p/GOLM1 axis,which might provide a potential treatment strategy for patients with PC.

miR-452、LncRNA KCNQ1OT1在肝癌组织中的表达情况及与预后间关系分析

目的探讨微小RNA(miR)-452、长链非编码RNA KCNQ1OT1(LncRNA KCNQ1OT1)在肝癌患者瘤组织中的表达情况及预后的关系。方法选取2017年9月至2021年6月邯郸市第一医院收治的肝癌患者92例作为研究对象。对比患者肝癌组织及癌旁组织miR-452、LncRNA KCNQ1OT1水平,随访至2022年2月,统计患者预后生存情况,Cox比例风险回归模型分析预后的影响因素,绘制不同miR-452、LncRNA KCNQ1OT1表达患者Kaplan-Meier生存曲线。结果肝癌组织miR-452、LncRNA KCNQ1OT1水平高于癌旁组织,差异有统计学意义(P<0.05);患者1年、3年生存率分别为64.37%(56/87)、42.53%(37/87);校正原发疾病、临床分期、肿瘤最大径、肿瘤数量、分化程度、Child Pugh分级、合并肝硬化、血管侵犯后,miR-452及LncRNA KCNQ1OT1表达仍是肝癌患者预后的独立影响因素(P<0.05);拟合模型:h(t,X)=h0(t)exp(1.188X1+1.326X2),X1为miR-452,X2为LncRNA KCNQ1OT1,构建个体PI方程:PI=1.188X1+1.326X2;不同miR-452、LncRNA KCNQ1OT1表达患者生存曲线率比较,差异有统计学意义(P<0.05)。结论肝癌患者组织miR-452、LncRNA KCNQ1OT1水平均呈异常高表达,且高表达情况与3年内高病死风险有关。

Knockdown of long non-coding RNA LCPAT1 inhibits autophagy in lung cancer

Objective: Long non-coding RNAs(lnc RNAs) are involved in numerous biological processes in lung cancer cells. In our previous studies, we identified a lnc RNA, ENST00000439577, which is highly expressed in lung carcinomas, and termed it lung cancer progression-associated transcript 1(LCPAT1). To characterize the role of LCPAT1 in lung cancer, we conducted the current study.Methods: Expression of LCPAT1 and autophagy-associated markers in tumor tissues and lung cancer cell lines was determined by real-time quantitative polymerase chain reaction(q PCR). Hematoxylin and eosin(HE) staining, q PCR, Western blot, and immunohistochemistry were performed to evaluate xenografted tumor tissues. Autophagy induced by rapamycin was detected by Western blot and immunofluorescence in lung cancer cell lines.Results: Expression of LCPAT1 and microtubule-associated protein 1 light chain 3 beta(LC3B) was positively correlated in lung cancer. Knockdown of LCPAT1 inhibited tumor growth and suppressed cell autophagy in vivo. Moreover, LCPAT1 knockdown in lung cancer cell lines resulted in decreased autophagy-associated gene expression and alleviated the cell autophagy induced by rapamycin.Conclusions: We speculate that LCPAT1 plays a crucial role in regulating autophagy in lung cancer.

Targeting long non-coding RNA MALAT1 alleviates retinal neurodegeneration in diabetic mice

●AIM:To observe the effect of inhibiting long non-coding RNA(lncRNA)metastasis-associated lung adenocarcinoma transcript 1(MALAT1)on diabetic neurodegeneration.●METHODS:Thirty-six 8-week-old C57 BL/6 mice were randomly divided into normal control,diabetic control,diabetic scrambled small interfering RNAs(siRNAs)and diabetic MALAT1-siRNA groups.After diabetic induction with streptozocin intraperitoneally-injection,the diabetic M A L AT 1-s i R N A g ro u p w a s i n t r av i t r e a l l y i n j e c te d with 1μL 20μmol/L MALAT1 siRNA,and the diabetic scrambled siRNA group was injected with the same amount of scrambled siRNA.Electroretinography was performed to examine photoreceptor functions 16 wk after diabetes induction.MALAT1 expression was detected via real time polymerase chain reaction.Cone morphological changes were examined using immunofluorescence.Rod morphological changes were examined by determining outer nuclear layer(ONL)thickness.●RESULTS:The upregulation of retinal MALAT1 expression was detected in the diabetic control mice,while MALAT1 expression in the diabetic MALAT1-siRNA mice was decreased by 91.48%compared to diabetic control mice.The diabetic MALAT1-siRNA and diabetic control mice showed lower a-wave and b-wave amplitudes than did the normal control mice in scotopic and photopic electroretinogram,while the diabetic MALAT1-siRNA mice showed higher amplitudes than diabetic control mice.Morphological examination revealed that ONL thickness in the diabetic MALAT1-siRNA and diabetic control mice was lower than normal control mice.However,ONL thickness was greater in the diabetic MALAT1-siRNA mice than diabetic control mice.Moreover,the diabetic control mice performed a sparser cone cell arrangement and shorter outer segment morphology than diabetic MALAT1-siRNA mice.●CONCLUSION:Inhibiting retinal MALAT1 results in mitigative effects on the retinal photoreceptors,thus alleviating diabetic neurodegeneration.

A novel long non-coding RNA NFIA-AS1 is down-regulated in gastric cancer and inhibits proliferation of gastric cancer cells

Gastric cancer is one of the most common malignant gastrointestinal tumors whose morbidity and mortality account for the second and third place respectively in malignant tumors in China.As an important participant in tumor biology,the abnormal expression of long non-coding RNA(lncRNAs)in cancer cells is closely related to the occurrence and development of tumors and plays the role of oncogenes or tumor suppressor genes.In this study,we identified a novel lncRNA NFIA antisense RNA 1(NFIA-AS1)and explored its role and clinical significance in gastric cancer.Real-time quantitative PCR was performed to detect the expression of NFIA-AS1 in tumor tissues and corresponding normal tissues from 42 pairs of gastric cancer samples.The lower expression of NFIA-AS1 was significantly associated with larger tumor size,lower histological grade,and advanced TNM stage.Kaplan-meier analysis showed that NFIA-AS1 expression could be used as an independent predictor of overall survival.We also demonstrated that overexpression of NFIA-AS1 significantly inhibited the proliferation of gastric cancer cells through affecting p16 levels.In conclusion,our results suggest that the lncRNA NFIA-AS1 may play the role of tumor suppressor gene,and serve as a biomarker for prognosis or progression of gastric cancer.

长链非编码RNA Kcnq1ot1对小鼠糖尿病心肌病的作用

目的研究长链非编码RNA Kcnq1ot1在糖尿病心肌病中的作用及机制。方法C57BL/6小鼠分为对照组和糖尿病(DM)组,注射链脲佐菌素建立DM模型后喂养8周建立糖尿病心肌病模型。DM组小鼠注射慢病毒干扰Kcnq1ot1表达。qRT-PCR检测小鼠左心室Kcnq1ot1表达。超声心动图、HE和Masson染色评价小鼠左心室结构和功能,Western blot检测collagenⅠ、Ⅲ和TGF-β1/Smads通路表达水平。免疫组化、qRT-PCR和Western blot检测左心室NLRP3、caspase-1、IL-1β和GSDMD-N表达。结果与对照组相比,Kcnq1ot1在DM小鼠左心室中明显升高,注射Kcnq1ot1-shRNA慢病毒后被抑制。DM组小鼠心脏收缩和舒张功能明显下降,出现心肌细胞肥大及纤维化;干扰Kcnq1ot1后DM小鼠心脏功能和结构明显改善。此外,干扰Kcnq1ot1后胶原表达下调,TGF-β1/Smads通路被抑制,焦亡相关分子表达下调。结论LncRNA Kcnq1ot1在糖尿病心肌病小鼠中表达升高,干扰Kcnq1ot1能够通过抑制心肌焦亡,抑制TGF-β1/Smads通路,减轻糖尿病心肌间质纤维化,改善心脏结构和功能。

LncRNA KCNQ1OT1通过调控miR-506-3p表达调节喉鳞状细胞癌细胞的生物学行为

目的探讨长链非编码RNA(LncRNA)KCNQ1重叠转录物1(KCNQ1OT1)对喉鳞状细胞癌细胞生物学的影响及作用机制。方法于2019年5月至2020年2月,采用RT-qPCR法检测了45例来自山东大学齐鲁医院桓台分院喉鳞状细胞癌病人的癌组织和癌旁组织及购自上海研生实业有限公司的人胚肺成纤维细胞WI-38和购自中国科学院上海细胞库的喉鳞状细胞癌细胞系(EV-SCC-18、AMC-HN-8和HCC345)中KCNQ1OT1和miR-506-3p表达。以HCC345细胞为研究对象,转染KCNQ1OT1小干扰RNA或共转染KCNQ1OT1小干扰RNA与miR-506-3p抑制剂至HCC345细胞后,MTT法、流式细胞术、Transwell分别检测细胞增殖、凋亡、迁移和侵袭。双荧光素酶报告基因实验验证KCNQ1OT1与miR-506-3p的调控关系。结果喉鳞状细胞癌组织中KCNQ1OT1表达高于癌旁组织[(0.81±0.09)比(0.27±0.08)],miR-506-3p表达低于癌旁组织[(0.24±0.08)比(0.83±0.09)]。喉鳞状细胞癌细胞系(EV-SCC-18、AMC-HN-8和HCC345)中KCNQ1OT1表达均高于WI-38细胞[(2.44±0.22)、(2.69±0.21)、(3.61±0.24)比(1.00±0.13)],miR-506-3p表达均低于WI-38细胞[(0.41±0.13)、(0.30±0.12)、(0.22±0.11)比(1.00±0.12)]。与未敲减KCNQ1OT1的HCC345细胞比较,敲减KCNQ1OT1的HCC345细胞活力[(0.41±0.06)比(0.81±0.12)]、迁移数[(86.32±15.21)个比(162.31±20.23)个]和侵袭数[(65.23±12.05)个比(140.26±18.27)个]均降低,细胞凋亡率升高[(34.13±3.60)%比(3.79±2.37)%]。KCNQ1OT1在HCC345细胞中负调控miR-506-3p表达。敲减miR-506-3p逆转敲减KCNQ1OT1对HCC345细胞增殖、凋亡、迁移和侵袭的影响。结论KCNQ1OT1在喉鳞状细胞癌组织和细胞系中表达升高,其通过靶向miR-506-3p促进喉鳞状细胞癌细胞的恶性生物学行为。

Silencing of long non-coding RNA CCHE1 inhibits the ovarian cancer SKOV3 cell invasion and migration and inactivates the p38-MAPK signaling pathway

Ovarian cancer(OC)is a major cause of cancer-related deaths among gynaecologicalmalignancies.Emerging studies suggest that the long non-coding RNA(lncRNA)may be the potential biomarker for the diagnosis and prognosis of the cancer.The current study was carried out to investigate the role of lncRNA CCHE1 silencing in OC cell invasion and migration.Expression of lncRNA CCHE1 in normal ovarian cell Hose and OC cell lines HO 8910,A2780 and SKOV3 was detected.LncRNA were transfected with siRNA,and then the proliferation of cells was detected by using MTT assay.Cell invasion and migration was measured by using Transwell assay and scratch test,respectively.The protein levels of E-cadherin,N-cadherin,ERK,p38-MAPK and the phosphorylation of ERK and p38-MAPK in cells after siRNA transfection were detected by using Western blot analysis.Consequently,lncRNA CCHE1 expression was highly expressed in OC cell lines,especially in SKOV3 cells.siRNA1,siRNA2 and siRNA3 all decreased.lncRNA CCHE1 expression in SKOV3 cells and siRNA2 showed the best silencing efficacy.Silencing of lncRNA CCHE1 decreased proliferation,invasion and migration,and reduced the protein levels of N-cadherin,ERK,p38-MAPK and the phosphorylation of ERK and p38-MAPK,while reducing the protein level of E-cadherin in SKOV3 cells.Collectively,our study proved that the silencing of lncRNA CCHE1 could inhibit SKOV3 cell invasion and migration via inactivating the p38-MAPK signaling pathway.

Effect of interaction between long non-coding RNA malat1 and microrna-146a on trophoblast function in preeclampsia

Objective:To explore the interaction of long noncoding RNA (LncRNA) metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) with microRNA (miRNA)-146a on the effect and mechanism of preeclampsia (PE) trophoblast function.Methods: Choriocarcinoma cell line JEG-3 were cultured in vitro, and JEG-3 cells were transfected into four groups, namely Control, sh-MALAT1, miR-146a-5p inhibitor and sh-MALATI+miR-146a-5p inhibitor group. The sh-MALAT1 group was transfected with sh-MALAT1, the miR-146a-5p inhibitor group was transfected with miR-146a-5p inhibitor, the sh-MALAT1+inhibitor group was co-transfected with sh-MALAT1 and miR-146a-5p inhibitor, and Isometric empty vector was added in to the Control group. The mRNA level was detected by qPCR;the target relationship between MALAT1 and miR-146a-5p was predicted by bioinformation;the proliferation ability of JEG-3 cells was detected by CCK8 experiment after the four groups of plasmids were transfected;Western blot was used to detect the expression of protein in JEG-3 cells after different treatments.Results: sh-MALATl significantly decreased sh-MALATl and increased the mRNA level of miR-146a-5p in the choriocarcinoma cell line JEG-3. sh-MALATl inhibited the proliferation of JEG-3 cells, miR-146a-5p inhibitor promoted the proliferation of JEG-3 cells and weakened the effect of sh-MALATl production. At the same time, sh-MALATl attenuates the expression of TRAF6, VEGR, and MMP2 proteins in trophoblast cells, while miR-146a-5p inhibitor can enhance its expression and reduce the inhibitory effect of sh-MALATl.Conclusion: MALATl and miR-146a can interact to affect the biological behavior of trophoblast cells in preeclampsia.

lncRNA KCNQ1OT1通过miR-19a-3p/TSHZ3影响高糖诱导的人视网膜上皮细胞增殖与凋亡

目的:观察长链非编码RNA(lncRNA)KCNQ1OT1通过miR-19a-3p/TSHZ3影响高糖(HG)诱导的人视网膜上皮细胞(ARPE-19)增殖、凋亡与氧化应激情况。方法:运用细胞计数试剂盒8(CCK-8)检测5、15、45、135mmol/L HG刺激的ARPE-19的细胞存活率。将ARPE-19细胞分为NC组、45mmol/L HG组、si-NC+45mmol/L HG组、si-lncRNA KCNQ1OT1+45mmol/L HG组、miR-NC+45mmol/L HG组、miR-19a-3p mimics+45mmol/L HG组、si-con+45mmol/L HG组、si-TSHZ3+45mmol/LHG组、pcDNA+si-lncRNA KCNQ1OT1+45mmol/L HG组、pcDNA-TSHZ3+si-lncRNA KCNQ1OT1+45mmol/L HG组。运用CCK-8检测细胞存活率,qRT-PCR检测lncRNA KCNQ1OT1、miR-19a-3p和TSHZ3 mRNA表达,Western Blot检测TSHZ3、活化-含半胱氨酸的天冬氨酸蛋白水解酶3(Cleaved-caspase-3)、B细胞淋巴瘤/白血病-2(Bcl-2)相关X蛋白(Bax)蛋白质的表达,酶联免疫吸附测定法(ELISA)检测氧化应激指标活性氧(ROS)、丙二醛(MDA)水平。双荧光素酶活性检测lncRNA KCNQ1OT1和miR-19a-3p、miR-19a-3p和TSHZ3之间的靶向结合。结果:15、45、135mmol/L HG抑制ARPE-19细胞的存活率,后续选择细胞存活率约50%的HG浓度45mmol/L。45mmol/L HG提高ARPE-19细胞中lncRNA KCNQ1OT1、TSHZ3 mRNA、TSHZ3蛋白表达水平、凋亡率、Cleaved-caspase-3、Bax蛋白表达、ROS和MDA水平,降低miR-19a-3p表达水平、细胞存活率(P<0.05)。lncRNA KCNQ1OT1、TSHZ3低表达或miR-19a-3p高表达提高HG诱导的ARPE-19细胞的存活率,降低凋亡率、Cleaved-caspase-3、Bax蛋白表达、ROS和MDA水平(P<0.05)。lncRNA KCNQ1OT1靶向miR-19a-3p,miR-19a-3p靶向TSHZ3,lncRNA KCNQ1OT13通过miR-19a-3p调控TSHZ3的表达。lncRNA KCNQ1OT1低表达对HG诱导的ARPE-19细胞存活率、凋亡以及氧化应激的影响被TSHZ3过表达所逆转。结论:lncRNA KCNQ1OT13低表达通过miR-19a-3p/TSHZ3,促进HG诱导的ARPE-19,并抑制其凋亡和氧化应激。

LncRNA KCNQ1OT1在肝癌组织和肝癌细胞系中表达及对肝癌干细胞自我更新能力的调节作用观察

目的观察长链非编码RNA KCNQ1OT1在肝癌组织和肝癌细胞系中表达及对肝癌干细胞自我更新能力的调节作用,并探讨其机制。方法采用RT-PCR法检测肝癌组织与癌旁组织、肝癌细胞系(Huh7、SMMC7721、Hep3B)与人永生化正常肝上皮细胞LO2中KCNQ1OT1。使用肝癌细胞系Huh7筛选获得CD13+CD133+的肝癌干细胞,分为A、B、C组,B组转染小干扰RNA技术抑制KCNQ1OT1表达的KCNQ1OT1敲降质粒KCNQ1OT1 shRNA,C组转染KCNQ1OT1 shRNA后转染YAP1过表达载体。采用细胞成球实验观察各组肝癌干细胞成球能力,采用克隆形成实验观察各组肝癌干细胞克隆形成能力,采用CCK8实验观察各组肝癌干细胞增殖能力。采用RT-PCR法检测各组肝癌干细胞中Hippo-YAP通路靶基因Yap1、Birc5、Foxm1 mRNA。结果肝癌组织中KCNQ1OT1的相对表达量高于癌旁组织(P<0.05),Huh7、SMMC7721、Hep3B细胞中KCNQ1OT1的相对表达量高于L02细胞(P均<0.05)。B组肝癌干细胞成球率、克隆形成数、24、48、72、96 h时的OD值均低于A、C组(P均<0.05)。B组肝癌干细胞中Yap1、Birc5、Foxm1 mRNA相对表达量均低于A、C组(P均<0.05)。结论KCNQ1OT1在肝癌组织和肝癌细胞系中高表达;抑制KCNQ1OT1表达可以降低肝癌干细胞的自我更新能力,高表达YAP1可拮抗此过程;KCNQ1OT1可能是通过激活Hippo-YAP信号通路影响肝癌干细胞的自我更新能力。