microRNA-186-5p及其靶基因CLDN18与甲状腺乳头状癌复发风险的关系

背景与目的：microRNA（miRNA）在肿瘤的发生、发展中发挥重要作用,而且不同的miRNA表达状态与肿瘤的不同生物学特征紧密关联。本研究通过分析不同复发风险甲状腺乳头状癌（PTC）患者差异表达的miRNA,筛选与PTC复发风险相关的miRNA,并分析其作用机制。 方法：用基因芯片技术分析低危复发风险与中高危复发风险PTC患者血清外泌体中差异表达的miRNA,然后用qRT-PCR方法PTC患者肿瘤组织中验证;用Transwell实验筛选出与PTC细胞侵袭能力有关的差异表达miRNA。通过OncomiR在线数据库对筛选的细胞侵袭力相关miRNA的靶基因进行预测,随后采用过表达与敲低策略,分析PTC细胞相关蛋白表达（Western blot）与PTC细胞侵袭能力（Transwell）的变化,明确细胞侵袭力相关miRNA与预测靶基因的关系。最后,通过GEPIA在线网站对TCGA数据库中PTC临床样本的分析进一步确证。 结果：基因芯片分析结果显示,与低危复发风险PTC患者比较,中高危复发风险PTC患者血清外泌体中4个miRNA（miR-186-5p、miR-532-3p、miR-199b-3p、miR-3158-5p）表达上调,1个miRNA（miR-3605-5p）表达下调（均P<0.05）;组织标本qRT-PCR验证结果显示,中高危复发风险PTC患者癌组织中miR-186-5p和miR-3158-5p表达上调（均P<0.05）;Transwell实验结果显示,过表达miR-186-5p后PTC细胞侵袭能力明显增强,敲低则明显减弱（均P<0.05）,但改变miR-3158-5p的表达水平对PTC细胞的侵袭能力无明显影响（均P>0.05）。OncomiR在线数据库预测PRDX6、S100PBP、CLDN18、MAP2可能是miR-186-5p的靶基因;Western blot结果显示,过表达miR-186-5p后PTC细胞中CLDN18的蛋白表达明显降低,敲低则相反,但改变miR-3158-5p的表达水平对其他3个基因的蛋白表达无明显影响;Transwell实验结果显示,过表达CLDN18表达后PTC细胞的侵袭能力明显减弱,敲低则明显增强,而过表达或敲低miR-186-5p对PTC细胞的作用被同时过表达或敲低CLDN18所逆转（均P<0.05）。TCGA数据库分析结果显示,PTC组织中CLDN18表达较正常甲状腺组织明显降低。 结论：miR-186-5p表达的增高可能与PTC的复发风险密切相关,机制可能与其通过调节下游CLDN18基因的表达而影响PTC细胞的侵袭能力有关。     

lncRNA XIST is associated with preeclampsia and mediates trophoblast cell invasion via miR-340-5p/KCNJ16 signaling pathway

BackgroundPreeclampsia (PE) is a syndrome commonly occurring among the pregnant. Shallow trophoblast invasion is considered to be closely related to PE. Therefore, in trophoblast cells, we explored the potential mechanisms of lncRNA XIST in the modulation of trophoblast invasion and proliferation.MethodsGEO online analyzer was used to screen the abnormally expressed RNAs in placenta tissues from patients with severe PE and healthy controls. The prediction of target bindings was performed on TargetScan and starBase. Transfection was conducted to regulate the RNA expression levels in trophoblast cells, HTR-8/SVneo. RT-qPCR measured expression of lncRNA XIST, miR-340-5p and KCNJ16. The CCK-8 assay examined cell viability. Flow cytometer analyzed apoptosis and luciferase assay determined the luciferase activity. Transwell assays detected the invasion and western blot verified the changes in protein expression of MMP2, MMP9 and KCNJ16 in trophoblast cells.ResultslncRNA XIST expression was enhanced in PE patients. Upregulation of lncRNA XIST in HTR-8/SVneo cells inhibited the cell proliferation and invasion, and induced apoptosis. XIST upregulation inhibited MMP2 and MMP9 protein expression. lncRNA XIST/ KCNJ16 interplayed as ceRNAs of miR-340-5p. Specifically,miR-340-5p overexpression reversed the effect of XIST upregulation on the cell apoptosis, proliferation and invasive ability and the knockdown of KCNJ16 could add to the effect of miR-340-5p overexpression in HTR-8/SVneo.ConclusionlncRNA XIST was upregulated in PE. Upregulation of lncRNA XIST exerted the inhibitory effects on the proliferation and invasion of trophoblast cells through the interactions with miR-340-5p/KCNJ16, which suggests that the lncRNA XIST/miR-340-5p/KCNJ16 axis might play a role in PE.     

微RNA-129-5p靶向Fas相关死亡功能域蛋白基因对体外培养人椎间盘髓核细胞凋亡的影响

目的研究微RNA-129-5p(miR-129-5p)靶向Fas相关死亡功能域蛋白(FADD)基因对人椎间盘髓核细胞(hNPC)凋亡的影响,并探讨其作用机制。方法运用脂质体法将miR-219-5p抑制子转染至hNPC中抑制miR-219-5p表达,将pcDNA-FADD转染至hNPC中使FADD过表达,将miR-219-5p抑制子和FADD siRNA共转染至hNPC中抑制miR-219-5p和FADD表达。采用流式细胞术检测各组细胞凋亡率,蛋白质印迹法检测抑制miR-219-5p表达后hNPC细胞中FADD、半胱氨酸蛋白酶-3(Caspase-3)、Bcl-2和Bax蛋白表达量。通过Targetscan软件预测miR-129-5p和FADD靶向结合位点,采用双荧光素酶报告基因实验检测二者的靶向关系。结果抑制miR-219-5p、过表达FADD均可明显促进hNPC凋亡。Targetscan软件预测发现FADD 3′-UTR上存在miR-219-5p的结合位点,双荧光素酶报告基因实验证实miR-129-5p和FADD具有靶向结合关系。抑制miR-219-5p的表达后,hNPC中FADD表达上调,同时促凋亡蛋白Caspase-3表达上调,抑凋亡蛋白Bcl-2表达下调。抑制FADD可逆转miR-219-5p低表达对hNPC凋亡的促进作用。结论低表达miR-219-5p可促进hNPC凋亡,其机制可能与miR-129-5p靶向FADD有关。     

长链非编码RNA MCM3AP-AS1靶向调控miR-876-5p对卵巢癌细胞增殖和转移的影响

目的探讨长链非编码RNA MCM3AP-AS1(MCM3AP antisense RNA 1,MCM3AP-AS1)靶向调控微小RNA-876-5p(miR-876-5p)对卵巢癌SKOV3细胞增殖和转移的影响。方法选取2017年4月至2018年5月温州市中心医院妇产科收治的40例卵巢癌患者癌组织和相应癌旁组织标本,及卵巢癌细胞系(CaOV3、SKOV3、OVCAR3、OV90)和正常卵巢上皮细胞系(HOSE)。采用实时定量聚合酶链式反应法(qRT-PCR)检测卵巢癌组织和细胞中lncRNA MCM3AP-AS1的表达水平;建立lncRNA MCM3AP-AS1低表达模型,采用MTT实验检测卵巢癌细胞增殖,采用transwell检测卵巢癌细胞的迁移和侵袭水平;采用生物信息分析、荧光素酶实验、qRT-PCR验证lncRNA MCM3AP-AS1和miR-876-5p的靶向关系。结果lncRNA MCM3AP-AS1在卵巢癌组织中的水平为(8.45±0.86),高于癌旁组织(4.45±0.45);在卵巢癌细胞中的水平为CaOV3(1.53±0.12),SKOV3(1.82±0.23),OVCAR3(1.34±0.12),高于正常卵巢上皮细胞HOSE(1.00±0.10);下调lncRNA MCM3AP-AS1能降低卵巢癌细胞增殖、迁移和侵袭;lncRNA MCM3AP-AS1能与miR-876-5p相互作用并下调其表达。结论lncRNA MCM3AP-AS1可通过靶向抑制miR-876-5p促进卵巢癌细胞的增殖、迁移和侵袭。     

The efficiency of serum lncRNA GAS5/miR-21 as biomarkers in patients with diabetes and diabetic nephropathy

Objective To elucidate the efficiency lncRNA GAS5 and miR-21 as biomarkers in diabetes mellitus and diabetic nephropathy. Methods The patients were divided into three groups, diabetic nephropathy group (DN group proven by renal biopsy, n=25, 14 males and 11 females), diabetes group (DM group, with normal urine albumin creatinine ratio, n=10, 4 males and 6 females), and normal control group (NC group, n=9, 4 males and 5 females). The expressions of lncRNA GAS5 and miR-21 in serum samples were detected by real-time quantitative PCR. The correlation between serum lncRNA GAS5 and miR-21 expressions and the clinical parameters was analyzed by T-test, Pearson, Spearman test and multivariate linear regression analysis. Differences of lncRNA GAS5 and miR-21 in different groups were analyzed by one-way analysis of variance. The ROC curve was used to analyze the diagnostic efficacy of lncRNA GAS5 and miR-21 in diabetes and diabetic nephropathy. All data were analyzed by SPSS 20.0 and GraphPad software, with P＜0.05 as considered statistically significant. Results (1) The expression of serum lncRNA GAS5 was significantly down-regulated and serum miR-21 was significantly up-regulated in both diabetes mellitus and diabetic nephropathy patients compared to the NC group all (P＜0.05). (2) In DN patients, the expression of serum lncRNA GAS5 was gradually up-regulated along with the increment of 24 h urinary protein. The expression of serum miR-21 was gradually up-regulated along with renal biopsy stage IIb-Ⅲ of DN (P＜0.05). (3) FBG and HbA1c were all negatively correlated with serum lncRNA GAS5 (P＜0.05), and FBG was independently correlated with serum lncRNA GAS5 (P＜0.05). Urine microalbumin, Total cholesterol(TC), Scr, Urea and SBP were all positively correlated with serum miR-21(P＜0.05). Albumin (ALB) and estimated GFR (eGFR) were negatively correlated with serum miR-21(P＜0.05), and ALB was independently correlated with serum miR-21 (P＜0.05). (4) The diagnostic efficiency of serum lncRNA GAS5, miR-21 and lncRNA GAS5/miR-21 as "diagnostic signature" for DM were was good (P＜0.05). (5) The diagnostic efficiency of serum miR-21 and lncRNA GAS5/miR-21 as "diagnostic signature" for DN were was good (P＜0.05). Conclusions (1) Serum lncRNA GAS5 had good diagnostic efficiency in diabetes mellitus. The sensitivity of lncRNA GAS5/miR-21 for diagnosis of diabetes was 85.71%, and specificity was 88.89%. (2) The level of serum miR-21 can be used as a noninvasive diagnostic marker for diabetic nephropathy.     

CircHIPK3 alleviates inflammatory response and neuronal apoptosis via regulating miR-382-5p/DUSP1 axis in spinal cord injury

BackgroundSpinal cord injury (SCI) is one of the serious neurological diseases with high morbidity which may be treated with hematopoietic stem cell (HSC) transplants. Circular RNAs (circRNAs) play vital roles in SCI. The study aimed to reveal the function and mechanism of circRNA homeodomain interacting protein kinase 3 (HIPK3) in SCI.MethodsSCI model in vitro was established by treating neuronal cells AGE1.HN with oxygen-glucose deprivation (OGD) and CoCl2. The levels of circHIPK3, miR-382-5p and dual specificity phosphatase 1 (DUSP1) were examined using quantitative real-time PCR (qRT-PCR) or western blot assay. Enzyme linked immunosorbent assay (ELISA) was used to detect the levels of inflammatory factors (IL-6 and TNF-α). Cell proliferation and apoptosis were evaluated by 5′-ethynyl-2′-deoxyuridine (EdU) assay and flow cytometry. Caspase-3 Colorimetric Assay Kit was used to detect aaspase-3 activity. The interactions among circHIPK3, miR-382-5p and DUSP1 were confirmed by dual-luciferase reporter and RNA immunoprecipitation assays.ResultsCircHIPK3 and DUSP1 were down-regulated, while miR-382-5p was up-regulated in OGD-induced AGE1.HN cells. Overexpression of circHIPK3 suppressed inflammatory response and cell apoptosis and promoted proliferation in OGD-induced AGE1.HN cells by sponging miR-382-5p. CircHIPK3 regulated DUSP1 expression by targeting miR-382-5p. MiR-382-5p inhibition hindered inflammatory response of IL-6 and TNF-α and neuronal apoptosis and promoted apoptosis via targeting DUSP1.ConclusionCircHIPK3 overexpression alleviated OGD-induced AGE1.HN cell inflammatory response and neuronal apoptosis via regulating miR-382-5p/DUSP1 axis, indicating that circHIPK3 might be a promising therapeutic target for SCI.     

上调lncRNA SNHG12与miR-199a-5p/FZD6轴对肝细胞癌细胞增殖、侵袭和上皮-间质转化的影响

背景与目的:肝细胞癌(HCC)是临床上常见的恶性肿瘤之一,侵袭、转移和术后复发是导致HCC患者死亡的主要原因.目前认为长链非编码RNA (lncRNA)的失调可能与各类癌症的发生和转移有关.有研究显示lncRNA SNHG12在HCC组织表达明显上调,但其具体功能尚不清楚.故本研究探讨lncRNA SNHG12在HCC...     

miR-34b-5p promotes renal cell inflammation and apoptosis by inhibiting aquaporin-2 in sepsis-induced acute kidney injury

ObjectiveThis study was designed to uncover the mechanism of miR-34b-5p-mediated aquaporin-2 (AQP2) in sepsis-induced injury using human renal tubular epithelial cells (HK-2).MethodsSerum levels of miR-34b-5p, TNF-α, IL-1β, IL-6, serum creatinine (SCr), and blood urea nitrogen (BUN) in septic patients with acute kidney injury (AKI) and healthy controls were detected. Lipopolysaccharide (LPS) was used to induce sepsis in HK-2 cells. LPS-induced HK-2 cells were transfected with miR-34b-5p inhibitor, miR-34b-5p mimic, pcDNA3.1-AQP2, si-AQP2, miR-34b-5p inhibitor + si-NC, or miR-34b-5p inhibitor + si-AQP2. The expressions of miR-34b-5p, AQP2, Bax, Bcl-2, cleaved caspase-3, TNF-α, IL-1β, and IL-6 in HK-2 cells were detected. TUNEL staining revealed the apoptosis of HK-2 cells. Dual-luciferase reporter assay verified the binding between miR-34b-5p and AQP2.ResultsThe expression of miR-34b-5p and the inflammatory responses were augmented in septic AKI patients. miR-34b-5p was up-regulated and AQP2 was down-regulated in LPS-induced HK-2 cells. miR-34b-5p inhibition or AQP2 overexpression ameliorated apoptosis and inflammation in LPS-induced HK-2 cells. In contrast, overexpressing miR-34b-5p deteriorated LPS-induced injury in HK-2 cells. AQP2 was a downstream target of miR-34b-5p. AQP2 silencing abolished the suppressive effects of miR-34b-5p inhibition on LPS-induced apoptosis and inflammatory response in HK-2 cells.ConclusionmiR-34b-5p inhibits AQP2 to promote LPS-induced injury in HK-2 cells.     

Long non-coding RNA HOXA11-AS contributes to the formation of keloid by relieving the inhibition of miR-182-5p on ZNF217

BackgroundLong non-coding RNA (lncRNA) dysregulation is demonstrated to be associated with disease progression. Mounting studies show that lncRNA promotes or inhibits the development of keloid. We aimed to disclose the role of homebox A11 antisense RNA (HOXA11-AS) in the formation of keloid.MethodsQuantitative real-time PCR (qPCR) was adopted for expression analysis of HOXA11-AS, miR-182-5p and zinc finger protein 217 (ZNF217) mRNA, and the expression of ZNF protein and marker proteins was detected by western blot. Cell proliferation, cell migration and cell apoptosis were investigated using CCK-8 assay, wound healing assay and flow cytometry assay, respectively. The potential interplay between miR-182-5p and HOXA11-AS or ZNF217 was verified by dual-luciferase reporter assay, RIP assay and pull-down assay. The role of HOXA11 in vivo was studied by establishing animal models.ResultsHOXA11-AS was highly expressed in tissues and fibroblasts of keloid. Deficiency of HOXA11-AS blocked the proliferation and migration of keloid fibroblasts and induced fibroblast apoptosis. HOXA11-AS directly combined to miR-182-5p whose downregulation reversed the effects of HOXA11-AS knockdown. ZNF217 was a target of miR-182-5p, and HOXA11-AS indirectly promoted ZNF217 expression by binding to miR-182-5p. MiR-182-5p enrichment also blocked keloid fibroblast proliferation, survival and migration, while further ZNF217 overexpression abolished these effects. HOXA11-AS knockdown also hindered the growth of keloid in mouse models.ConclusionHigh expression of HOXA11-AS promoted the formation and growth of keloid through the upregulation of ZNF217 by targeting miR-182-5p, and the inhibition of HOXA11-AS might be a novel strategy to prevent keloid development.     

Enzalutamide-resistant related lncRNA NONHSAT210528 promotes the proliferation and invasion of prostate cancer

BackgroundAs a new-generation androgen-receptor antagonist, enzalutamide is a first-choice drug for advanced prostate cancer (PCa) patients. However, secondary resistance to enzalutamide poses a new challenge in the treatment of cancer. Long non-coding RNA (lncRNA) regulates cell function through many levels and mechanisms, and also plays an important role in the biological behaviors of tumors.MethodsLncRNA microarrays were used to detect enzalutamide-resistant related lncRNA in Enzalutamide-resistant C4-2 (C4-2 ENZ-R) cells and corresponding parent cells. Cell Counting Kit 8, flow cytometry, and transwell assays were used to test the effect of lncRNA NONHSAT210528 on the function of PCa cells. RNA pulls down and the luciferase report gene was used to detect the competitive endogenous RNA (ceRNA) mechanism. The culture supernatant of C4-2 and C4-2b cells was transferred to the lower chamber for transwell assay of human umbilical endothelial cells (HUVECs).ResultsThe lncRNA microarray analysis showed that there were significant differences in the expression of many lncRNAs between the C4-2 ENZ-R and C4-2 cells. The real-time polymerase chain reaction (PCR) detection showed that the expression of lncRNA NONHSAT210528 was significantly higher in the C4-2 ENZ-R cells than the C4-2 cells. The Transwell assays showed that lncRNA NONHSAT210528 overexpression increased the invasion of the C4-2 and C4-2b cells. The cell-wound scratch and the transwell assays showed that the culture supernatant of C4-2 and C4-2b cells with overexpressed lncRNA NONHSAT210528 promoted the migration and invasion of HUVECs. Furthermore, lncRNA NONHSAT210528 regulated the expression of YOD1 dependent on miR-21.ConclusionsEnzalutamide-resistant related lncRNA NONHSAT210528 appears to promote the proliferation and invasion of PCa cells by functioning as a ceRNA and regulating the miR-21-5p/YOD1 signal pathway.     

microRNA-671-5p在肝细胞癌中的表达及其负向调控丝切蛋白2与上皮细胞-间质转化的关系

背景与目的:近年研究发现,microRNA-671-5p(miR-671-5p)参与了多种恶性肿瘤的发生发展,同时与多种病毒介导的肝损伤相关,但其与肝细胞癌(HCC)之间的关系目前仍未见报道。本研究的目的为观察miR-671-5p在HCC中的表达情况,分析其功能及其与HCC生物学行为及临床病理特征的联系,并初步探讨作用机制。方法:用qRT-PCR检测80例HCC组织及癌旁组织样本、不同HCC细胞系(Hep3B、MHCC-97H、HepG2、SMMC-7721)及人正常肝细胞(L02)中miR-671-5p的表达,且在同时分析TCGA数据库中miR-671-5p在HCC组织与癌旁组织的表达差异。分析miR-671-5p表达量与临床病理因素的关系;用miR-671-5p抑制物敲低MHCC-97H细胞系中miR-671-5p的表后,分别采用CCK-8实验及Transwell实验分别检测HCC细胞转染miR-671-5p抑制物后增殖、侵袭及迁移能力的变化。利用TargetScan及Starbase网站预测miR-671-5p的靶基因,并通过Western blot、双荧光素酶实验及TCGA数据库分析验证。用Western blot观察降低miR-671-5p表达对HCC细胞中miR-671-5p靶基因及上皮细胞-间质转化(EMT)相关蛋白(E-cadherin、N-cadherin、vimentin)表达的影响,以及在此基础上同时敲低靶基因的表达后,以上蛋白表达的变化。结果:miR-671-5p的表达在HCC组织中明显高于其癌旁组织,在各种HCC细胞系中均明显高于正常肝细胞,且随着样本肿瘤分期与HCC细胞的侵袭力的增加而升高(均P0.05);TCGA数据库分析也显示,miR-671-5p在HCC组织中的表达量明显高于癌旁组织(P0.05)。miR-671-5p的表达水平与AFP水平、肿瘤数目、静脉侵犯、Edmondson-Steiner分级及TNM分期明显有关(均P0.05)。转染miR-671-5p抑制物后,MHCC-97H细胞的增殖、侵袭及迁移能力均明显降低(均P0.05)。生物信息学分析及双荧光素酶实验均显示丝切蛋白2(CFL2)是miR-671-5p潜在靶基因,TCGA数据库分析也显示miR-671-5p与CFL2的表达呈负相关(均P0.05)。降低MHCC-97H细胞中miR-671-5p的表达后,CFL2蛋白的表达水平升高,同时EMT相关蛋白表达明显降低(均P0.05),但同时干扰CFL2的表达后,以上变化均有明显程度的逆转(均P0.05)。结论:miR-671-5p在HCC中表达上调,且与HCC的不良临床病理特征密切相关。miR-671-5p可促进HCC细胞的增殖、侵袭、迁移,其机制可能与抑制CFL2的表达而促进EMT发生有关。     

Downregulation of miR-574-5p inhibits HK-2 cell viability and predicts the onset of acute kidney injury in sepsis patients

BackgroundIncreased levels of microRNA-574-5p (miR-574-5p) have been found to be associated with increased survival of septic patients, indicating the potential role of miR-574-5p in protecting against septic progression and complications. Acute kidney injury (AKI) is one of the most common and serious complications of sepsis. Therefore, the aim of this study was to test these hypotheses: (1) in a renal cell culture line (HK-2), upregulated expression of miR-574-5p increases, and downregulated expression of miR-574-5p decreases cell viability, and (2) serum levels of miR-574-5p from patients with sepsis and AKI are lower than those of patients with sepsis but no AKI.MethodsThe expression of miR-574-5p was regulated by cell transfection in HK-2 cells, and HK-2 cell viability was measured using the Cell Counting Kit-8. Serum miR-574-5p expression was analyzed using qRT-PCR. The predictive value of miR-574-5p for AKI onset was evaluated using the receiver operating characteristic curve and logistic regression analysis.ResultsThe overexpression of miR-574-5p promoted HK-2 cell viability. Fifty-eight sepsis patients developed AKI, who had significantly lower miR-574-5p expression. miR-574-5p expression was decreased with AKI stage increase and correlated with kidney injury biomarker and had relatively high accuracy to predict AKI occurrence from sepsis patients.ConclusionOverexpression of miR-574-5p in cultured HK-2 cells increases cell viability and knocked-down expression of miR-574-5p decreases cell viability. Consistently, septic patients with AKI were found to have less upregulation of miR-574-5p expression compared to septic patients without AKI. Thus, serum miR-574-5p may provide a novel biomarker for septic AKI.     

肝细胞癌中miR-942-5p的表达及其与患者恶性特征及不良预后的关系

目的:探讨微小RNA-942-5p(miR-942-5p)在肝细胞癌(HCC)组织中的表达及其功能。方法:用实时定量PCR检测西安交通大学第一附属医院样本库保存的73例HCC组织和对应癌旁组织中miR-942-5p的表达。分析miR-942-5p表达与HCC患者临床病理资料的关系,同时分析TCGA数据库中miR-942-5p表达与HCC患者总生存率的关系。Transwell小室检测干扰miR-942-5p表达后HCC细胞迁移和侵袭能力的变化,StarBase V3.0网站和荧光素酶报告基因质粒预测分析miR-942-5p的下游靶点,并用Western blot验证。结果:miR-942-5p表达量在HCC组织中明显高于对应癌旁组织(2.390 vs. 1.764,P0.05)。miR-942-5p表达量与HCC患者肿瘤数目、血管浸润和临床分期明显有关(均P0.05)。miR-942-5p高表达HCC患者总生存率明显低于miR-942-5p低表达HCC患者(19.535%vs. 53.873%,P0.05)。沉默miR-942-5p表达后,肝癌HCCLM3和MHCC97H细胞迁移和侵袭能力明显减弱(均P0.05)。预测与分析结果显示,扣针蛋白5(FBLN5)是miR-942-5p的直接下游靶点(P0.05),沉默miR-942-5p表达导致HCCLM3和MHCC97H细胞中FBLN5表达增加。结论:miR-942-5p在HCC组织中表达异常升高并与恶性临床特征和不良预后密切相关,机制可能与miR-942-5p抑制FBLN5表达促进HCC细胞迁移和侵袭有关。     

miR-181a-5p通过HOXB4抑制骨肉瘤细胞HOS增殖和迁移

目的：研究miR-181a-5p对HOS骨肉瘤细胞增殖、周期和迁移的影响及其机制。方法 ：采用实时定量PCR检测hFOB1.19成骨细胞和HOS、U2OS、MG63骨肉瘤细胞系中miR-181a-5p及HOXB4的表达情况。利用Lipofectamine 2000将miR-181a-5p mimics和miR-181a-5p inhibitor分别转染至人骨肉瘤HOS细胞中（分别为过表达组和抑制剂组）,并设置miR阴性对照组;CCK-8法检测各组细胞的增殖能力变化,流式细胞术检测各组细胞的细胞周期变化,划痕愈合实验以及Transwell迁移实验检测各组细胞的迁移能力变化。Targetscan网站预测miR-181a-5p的靶向基因,并通过双荧光素酶报告基因系统及Western blot验证靶向关系。结果：与成骨细胞hFOB1.19相比,miR-181a-5p在骨肉瘤细胞HOS、U2OS和MG63中低表达（P<0.05）,而HOXB4在骨肉瘤中高表达（P<0.05）。与阴性对照组相比,过表达miR-181a-5p抑制骨肉瘤HOS细胞的增殖和迁移能力,并且处于细胞周期S期的细胞...     

miR-9-5p调控雄激素受体的表达促进卵巢颗粒细胞增殖

目的 分析微小RNA-9-5p(miR-9-5p)在多囊卵巢综合征(PCOS)中的诊断价值,并探讨对卵巢颗粒细胞(KGN)增殖的作用机制.方法 采用荧光定量PCR(qRT-PCR)技术分析miR-9-5p在50例PCOS患者(实验组)及50例健康女性(对照组)血清中的表达特征.采用受试者工作特征曲线(ROC)评估miR...