MicroRNA-574-5p directly targets FOXN3 to mediate thyroid cancer progression via Wnt/β-catenin signaling pathway

ObjectiveThyroid cancer is the most common endocrine tumor. A large number of thyroid cancer-related miRNAs have been studied and identified. However, the detailed roles of miR-574-5p in thyroid cancer remain poorly understood. This work mainly aimed to investigate the role of miR-574-5p/FOXN3 axis and its mechanism in the thyroid cancer progression.MethodsMiR-574-5p, FOXN3, Wnt/β-catenin pathway, and apoptosis-related markers were measured by quantitative real-time PCR (qRT-PCR) and western blotting analysis, respectively. Luciferase reporter assay was employed to validate the direct targeting of FOXN3 by miR-574-5p. MTT, flow cytometry, wound healing and transwell experiments were applied to analyze the functions of FOXN3 and miR-574-5p in thyroid cancer cells.ResultsKnockdown of miR-574-5p up-regulated FOXN3 expression and miR-574-5p directly targeted FOXN3 in thyroid cancer cells. Biological function experiments showed that knockdown of miR-574-5p inhibited proliferation, migration, invasion and promoted apoptosis of thyroid cancer cells. The activation of Wnt/β-catenin pathway was suppressed by MiR-574-5p silencing. FOXN3 silencing reversed the effects of miR-574-5p inhibitor on FOXN3 level and Wnt/β-catenin singling pathway, also reversed the effects on cell migration, proliferation, invasion and apoptosis.ConclusionThe miR-574-5p/FOXN3 axis is a novel molecular mechanism that promotes thyroid cancer progression, suggesting their potential for clinical therapy of thyroid cancer.     

miR-197-3p调控DMBT1抑制甲状腺癌细胞系增殖、迁移和侵袭

目的探讨miR-197-3p是否通过靶向调控恶性脑瘤缺失1基因(DMBT1)影响甲状腺癌细胞增殖、迁移和侵袭。方法RT-qPCR检测健康人甲状腺细胞Nthy-ori 3-1和甲状腺癌细胞SW579、CGTHW-1中miR-197-3p表达;MTT法检测SW579细胞增殖;Transwell小室法检测SW579细胞迁移和侵袭;双荧光素酶报告基因实验验证miR-197-3p是否靶向DMBT1;Western blot检测细胞DMBT1、cyclinD1、p21、MMP-2和E-cadherin蛋白表达。结果与Nthy-ori 3-1细胞比较,SW579和CGTHW-1细胞中miR-197-3p相对表达量升高(P<0.05);抑制miR-197-3p表达后,SW579细胞的增殖、迁移和侵袭能力明显受到抑制,细胞中cyclinD1蛋白和MMP-2蛋白表达降低而p21蛋白和E-cadherin蛋白表达升高;SW579细胞中miR-197-3p靶向负调控DMBT1的表达;过表达DMBT1明显抑制SW579细胞增殖、迁移和侵袭,而抑制DMBT1则能逆转miR-197-3p对SW579细胞增殖、迁移和侵袭的影响。结论miR-197-3p通过靶向调控DMBT1的表达,抑制甲状腺癌细胞增殖、迁移和侵袭。     

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.     

miR-135b-3p调控XAF1表达影响甲状腺癌细胞的迁移、侵袭和放射增敏性

目的探讨miR-135b-3p对甲状腺癌细胞迁移、侵袭和放射敏感性的影响以及其可能的调控机制。方法培养正常甲状腺细胞Nthy-ori 3-1、甲状腺癌细胞K1和TPC-1,RT-qPCR检测细胞中miR-135b-3p表达,Western blot检测细胞中X染色体连锁凋亡抑制蛋白相关因子1(XAF1)表达。转染anti-miR-135b-3p至TPC-1细胞抑制miR-135b-3p表达,Transwell、Western blot及克隆形成实验分别检测抑制miR-135b-3p表达对TPC-1细胞迁移和侵袭、E-cadherin和MMP-2蛋白表达及对TPC-1细胞放射敏感性的影响。双荧光素酶报告基因实验验证miR-135b-3p与XAF1之间的靶向调控关系。结果与Nthy-ori 3-1细胞相比,K1和TPC-1细胞中miR-135b-3p表达水平显著升高(P<0.05),XAF1蛋白表达水平显著降低(P<0.05)。抑制miR-135b-3p表达可抑制TPC-1细胞的迁移和侵袭能力(P<0.05),促进TPC-1细胞E-cadherin蛋白表达(P<0.05),抑制MMP-2蛋白表达(P<0.05),增强TPC-1细胞的放射敏感性(P<0.05)。miR-135b-3p靶向负调控XAF1表达。抑制XAF1表达可降低抑制miR-135b-3p表达对TPC-1细胞迁移、侵袭及放射敏感性的影响。结论miR-135b-3p通过下调XAF1表达促进甲状腺癌细胞的迁移和侵袭能力,并降低其放射增敏性,是甲状腺癌的潜在治疗靶点。     

Abnormal increase of miR-4262 promotes cell proliferation and migration by targeting large tumor suppressor 1 in gliomas

BackgroundmiRNA was recently detected as tumor suppressor or inducer in various cancers including gliomas. Due to the abnormal expression of miR-4262 in glioma cancer, we supposed that miR-4262 made efforts in proliferation and migration in glioma cancer.MethodsCCK-8, Transwell migration Assay and Wound-healing assay were appraisal assays for cell proliferation and migration. qRT-PCR and western blot were performed to test the expression of miR-4262, MMP2, MMP13 and LATS1 in glioma cancers tissues and cancer cells. The targeting detection between miR-4262 and LATS1 was detected by luciferase reporter assay.ResultsmiR-4262 expression was dramatically higher in glioma tumor tissues than in para-tumor control. Inhibition of miR-4262 in glioma cancer cells prominently inhibited cell proliferation and migration. Mechanically, downregulation of miR-4262 inhibited expression of matrix metalloproteinase (MMP) -2, -13. In addition, miR-4262 directly and negatively modulated expression of large tumor suppressor 1 (LATS1). Moreover, we discovered that overexpression of LATS1 could reverse the effects of miR-4262 on cell proliferation and migration, as well as the production of MMP-2, -13.ConclusionsIn glioma cancer, miR-4262 regulated cell proliferation and migration mediated by LATS1. This indicated that miR-4262 is a tumor inducer in glioma cancer and may be a feasible target for glioma therapy.     

MicroRNA-129-5p suppresses proliferation,migration and invasion of retinoblastoma cells through PI3K/AKT signaling pathway by targeting PAX6

BackgroundRetinoblastoma (RB) is the most common primary intraocular malignancy in children. Accumulating evidences have clarified that microRNAs (miRNAs) modulated signaling molecules by acting as oncogenes or tumor-suppressor genes in RB. Thus, in our study, we aimed to investigate the function of miR-129-5p in RB cells through PI3K/AKT signaling pathway by targeting PAX6. Two RB cell lines, Y79 and WERI-Rb-1, were selected in our study, followed by transfection of miR-129-5p inhibitor or si-PAX6 to explore the regulatory role of miR-129-5p in RB cell proliferation, invasion and migration.Material and methodsDual-luciferase assay was used for the detection of targeting relationship between miR-129-5p and PAX6. Besides, western blot analysis was applied to detect expression of cell cycle-related factors (CDK2 and Cyclin E) and PI3K/AKT signaling pathway-related factors (p-AKT and AKT). Nude mice tumorigenesis experiment was used to evaluate the effect of miR-129a-5p on RB growth in vivo.ResultsmiR-129-5p was down-regulated in RB cell lines. miR-129-5p directly targeted the 3′-untranslated region of PAX6. Artificial down-regulation of miR-129-5p promoted cell proliferation, migration and invasion in RB cell lines Y79 and WERI-Rb-1, and promoted RB growth in vivo via PI3K/AKT signaling pathway, which could be reversed by transfection with silencing PAX6.ConclusionThis study provides evidences that RB progression was suppressed by overexpressed miR-129-5p via direct targeting of PAX6 through PI3K/AKT signaling pathway, which may provide a molecular basis for better treatment for RB.     

LncRNA OGFRP1 promotes angiogenesis and epithelial-mesenchymal transition in colorectal cancer cells through miR-423-5p/CTCF axis

ObjectiveTo investigate the mechanism of lncRNA OGFRP1 affecting angiogenesis and epithelial-mesenchymal transition (EMT) in colorectal cancer (CRC) and provide a new target for the treatment of CRC.MethodsThe expressions of OGFRP1, miR-423-5p, and CTCF were measured in CRC cell lines (HT29, LoVo, HCT116, SW620, and SW480) and normal colonic epithelial cells NCM460. Gain and loss of function experiments were performed on HCT116 and SW620 cells, after which the proliferation, apoptosis, EMT, invasion, and migration of the cells were measured using CCK-8 and colony formation assays, flow cytometry, Western blotting, Transwell, and scratch assay. The transfected cells were incubated with human umbilical vein endothelial cells (HUVECs) to assess angiogenesis using tube formation assay. ELISA was performed to detect VEGF in the conditioned medium of HCT116 and SW620 cells. The interactions among OGFRP1, CTCF and miR-423-5p were validated by dual-luciferase reporter assay.ResultsCRC cell lines had increased expression levels of OGFRP1 and CTCF and a suppressed expression level of miR-423-5p when compared with NCM460 cells. Suppression on OGFRP1 or CTCF and overexpression of miR-423-5p led to inhibited proliferation, EMT, invasion and migration and increased apoptosis of HCT116 and SW620 cells. HUVECs incubated with cells transfected with si-OGFRP1, si-CTCF or miR-423-5p mimic had suppressed angiogenesis ability. The effect of OGFRP1 suppression in CRC cells could be counteracted by miR-423-5p inhibition. Both CTCF and OGFRP1 could bind to miR-423-5p.ConclusionOGFRP1 promotes proliferation, EMT, and angiogenesis in CRC through miR-423-5p/CTCF axis.     

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.     

miR-26-p 在甲状腺癌中的表达及其功能研究

目的:探讨微小分子核糖核酸(miR)-126-3p 在甲状腺癌中的表达,探讨其生物学功能。方法:RT-PCR 检测35 例甲状腺癌、癌旁组织以及三种甲状腺癌细胞系(TPC-1、FTC-133、8505C)中miR-126-3p 表达量;将甲状腺癌细胞分为类似物组(mimic)和对照组(NC),分别转染miR-126-3p mimic 及阴性对照质粒。两组细胞增殖、凋亡分别采用Brdu-ELISA 法和流式细胞术检测, Transwell 小室法检测两组细胞迁移和侵袭。结果:35 例癌组织中miR-126-3p 相对表达量显著低于癌旁组织(0.384±0.28 vs 0.981±0.039,t =10.291,P<0.05);在三种甲状腺癌细胞中,TPC-1 细胞中miR-126-3p 相对表达量最低;与NC 组比较,mimic 组甲状腺癌细胞TPC-1 增殖受到显著的抑制,第3 天两组间开始表现出统计学差异(P<0.05);与NC 组比较,mimic 组甲状腺癌细胞TPC-1 凋亡显著增加[(15.32±3.20)% vs (8.12±1.17)%,t = 4.623,P<0.05],迁移受到抑制(26.68±4.48 vs 82.21±3.65,t=17.789,P<0.05),侵袭受到抑制(12.28±1.03 vs 34.43±2.10,t =8.103,P<0.05)。结论:甲状腺癌组织中miR-126-3p 表达降低,上调miR-126-3p 表达可以显著抑制甲状腺癌细胞增殖、促进凋亡、抑制迁移和侵袭,miR- 126-3p 可能作为一种抑癌基因在甲状腺癌中发挥重要的生物学功能。     

Exosomal miR-155-5p promotes proliferation and migration of gastric cancer cells by inhibiting TP53INP1 expression

Exosomal microRNA (miRNA) secreted by tumor cells plays an important biological role in tumorigenesis and development. We aimed to explore the effects of exosomal miR-155-5p in gastric cancer (GC) and understand its mechanism of action in GC progression. We isolated exosomes from the human gastric mucosal epithelial cell line GES-1 and gastric cancer cell line AGS, and then identified them according to their surface markers by flow cytometry. Later, we detected the miR-155-5p expression levels in tissues and isolated exosomes using RT-qPCR. Bioinformatics analysis showed that miR-155-5p directly binds to the 3' untranslated region (3'-UTR) of tumor protein p53-induced nuclear protein 1 (TP53INP1) mRNA. We also investigated whether the miR-155-5p-rich exosomes caused changes in cell cycle, proliferation, and migration in AGS cells. In this study, we found that the levels of miR-155-5p were significantly increased in GC tissues and AGS cells, and that the TP53INP1 protein level was downregulated in GC tissues using IHC and IFC. TP53INP1 was found to be directly regulated by miR-155-5p following a dual luciferase-based reporter assay. After co-culturing with the isolated miR-155-5p-rich exosomes, the proliferation and migration capabilities of AGS cells were enhanced. Thus, our results reveal that exosomal miR-155-5p acts as an oncogene by targeting TP53INP1 mRNA in human gastric cancer.     

长链非编码RNA UCA1 靶向miR-582-5p 对膀胱癌UM-UC-3细胞生存和运动能力的调节作用及机制研究

目的：探究长链非编码RNA-UCA1通过靶向miR-582-5p对膀胱癌细胞生存和运动能力的作用及作用机制。方法：用UCA1-shRNA(sh-UCA1)和(或)miR-582-5p inhibitor转染细胞,荧光定量检测转染效率及miR-582-5p的表达水平;荧光素酶报告实验确定UCA1和miR-582-5p的靶向关系;CCK8检测细胞活性,流式检测细胞凋亡情况,侵袭及划痕实验检测细胞侵袭迁移能力,免疫印迹检测细胞增殖、凋亡及迁移相关蛋白的表达。结果：sh-UCA1能显著降低膀胱癌细胞UCA1表达水平(P<0.05),促进miR-582-5p表达(P<0.05);miR-582-5p-inhibitor能明显减弱sh-UCA1对miR-582-5p表达的促进作用(P<0.05);荧光素酶报告实验表明UCA1上有miR-582-5p的结合位点;沉默UCA1可显著抑制膀胱癌细胞增殖及Ki67的表达,促进细胞凋亡及cleaved caspase-3的表达(P<0.05);同时,sh-UCA1还能显著抑制膀胱癌细胞侵袭、迁移及VEGF的表达(P<0.05);此外,miR-582-5p inhibitor可显著减弱sh-UCA1对细胞增殖、凋亡及侵袭迁移能力的作用(P<0.05)。结论：UCA1可通过靶向miR-582-5p增强膀胱癌UM-UC-3细胞的生存及运动能力。     

微小RNA-138-5p抑制肺癌细胞增殖、迁移和侵袭能力的机制研究

目的:探讨微小RNA-138-5p(miR-138-5p)抑制肺癌细胞增殖、迁移和侵袭能力的相关机制。方法:以肺癌细胞A549和H460作为研究对象,分别转染miR-NC(对照组)或miR-138-5p(实验组);生物信息学技术预测miR-138-5p的靶基因;RT-qPCR检测转染后细胞miR-138-5p、叉头框蛋白C1(FOXC1)mRNA和波形蛋白(vimentin)mRNA的相对表达量;Western blot法检测FOXC1、vimentin、E-cadherin、N-cadherin和β-catenin蛋白表达变化;MTS法和集落形成实验分别检测细胞的增殖能力;划痕愈合实验和Transwell法检测细胞迁移和侵袭能力。结果:miR-138-5p过表达显著降低FOXC1和vimentin的mRNA及蛋白的表达(P0.05),E-cadherin和β-catenin蛋白表达上调,N-cadherin蛋白表达下调,显著抑制肺癌细胞的增殖、迁移和侵袭能力(P0.05)。结论:miR-138-5p可以通过靶向干扰FOXC1和vimentin的表达抑制肺癌细胞的增殖、迁移和侵袭,可能是肺癌基因治疗的潜在靶点。     

MiR-124-3p inhibits the migration and invasion of Gastric cancer by targeting ITGB3

BACKGROUNDGastric cancer is one of the major malignant tumors in the world. Integrins expressed in cancer cells can promote tumor progression and migration. MiRNAs can inhibit the expression of target genes by directly binding to their mRNAs and can affect various important biological processes. The aim of this study was to investigate the role of miR-124- 3p and ITGB3 in gastric cancer.METHODSRT-PCR and western blot are used to detect the expression of miR-124-3p, ITGB3 and integrin β3 in gastric cancer tissues and cells. The wound healing, CCK-8 assay, transwell migration and invasion assay were performed to determine the cell proliferation, migration and invasion. What’s more, bioinformatics prediction and luciferase assay was conducted to demonstrated the binding efficiency between miR-124-3p and ITGB3.RESULTSWe verified that ITGB3 and miR-124-3p changes the migration and invasion of gastric cancer cells in vitro. The overexpression or silencing of miR-124-3p inhibited or promoted the proliferation, migration and invasion of both selected gastric cancer cells, and ITGB3 is just the reverse. Meanwhile, we validated that ITGB3 is the target of miR-124-3p by bioinformatics prediction and luciferase assay. Lastly, the expression of ITGB3 in 40 pairs of gastric cancer tissues were significantly higher than that in the adjacent normal tissues, while the expression level of miR-124-3p was significantly decreased in cancer tissues.CONCLUSIONSmiR-124-3p inhibits the migration and invasion of Gastric cancer by targeting ITGB3 in gastric cancer cells. Our results suggested that miR-124-3p and ITGB3 may reasonably serve as a promising therapeutic target.     

5,7,2,5-tetrahydroxy-8,6-dimethoxyflavone up-regulates miR-145 expression and inhibits proliferation of gastric cancer cells

IntroductionGastric cancer is a frequently detected malignancy, and its incidence has increased over the past decades in East Asia. The present study investigated the effect of 5,7,2, 5-tetrahydroxy-8,6-dimethoxyflavone (THDMF) on gastric cancer cells and explored the underlying mechanism. The study analysed cell viability changes, apoptotic features, and metastasis potential of treatment with THDMF.Material and methodsMTT colorimetric assay was used for measurement of MKN28, MKN45, and GES-1 cell proliferation and flow cytometry for the detection of apoptosis. Transwell and wound healing assays were used to observe the invasion and migration abilities of MKN28 cells. The expression of p21, MMP2/-9, PI3K, and c-Myc proteins was detected by western blotting.ResultsThe THDMF treatment significantly (p < 0.05) reduced MKN28 and MKN45 cell proliferation without changing GES-1 cell viability. A significant increase in apoptotic cell population on treatment with THDMF was observed. Treatment of MKN28 cells with THDMF increased the percentage of cells in the G1 phase. Exposure of MKN28 cells to THDMF caused a marked decrease in invasion and migration potential in comparison to control cells. The expression of miR-145 was markedly increased in MKN28 cells on treatment with THDMF. In MKN28 cells expression of c-Myc, PI3K, p-AKT, MMP-2, and MMP-9 was suppressed markedly on exposure to THDMF. The expression of p21 protein in MKN28 cells was markedly promoted on exposure to THDMF.ConclusionsTHDMF exhibits anti-cancer effect on gastric cancer cells in vitro by activation of cell apoptosis and arrest of cell cycle. In addition, THDMF promoted miR-145 expression and down-regulation of PI3K/AKT signalling pathway in MKN28 cells. Therefore, THDMF may be utilised as a potential novel therapeutic agent for the treatment of gastric cancer.     

MircoRNA-129-5p suppresses the development of glioma by targeting HOXC10

BackgroundmiR-129-5p has been reported to be abnormally expressed and plays an important role in the progression of various malignancies. However, its role in gliomas and its exact molecular mechanism need further research.Methods and materialsRT-qPCR was performed to evaluate miR-129-5p and HOXC10 mRNA expression levels in tissues and cell lines. Cell proliferation was detected via Cell Counting Kit-8 (CCK-8), 5-ethynyl-2′-deoxyuridine (EdU) and clone formation assays. Luciferase assays were used to validate the binding of seeds between miR-129-5p and HOXC10. A tumor xenograft model was developed to study the effect of miR‐129-5p on glioma growth in vivo.ResultsmiR-129-5p was expressed at low levels in glioma tissues and cell lines. miR-129-5p overexpression inhibited glioma proliferation, migration and invasion. miR-129-5p negatively and directly targeted HOXC10. At the same time, HOXC10 was upregulated in glioma cancer, and HOXC10 knockdown inhibited cell proliferation, migration and invasion.ConclusionmiR-129-5p inhibits glioma development by altering HOXC10 expression and may therefore serve as a new diagnostic marker and therapeutic target for glioma in the future.     

miR-145-5p靶向TPM3通过ERK信号通路抑制甲状腺癌TPC-1细胞侵袭和转移

目的 探讨miR-145-5p对甲状腺癌细胞侵袭和转移的影响.方法 将miR-145-5p mimic质粒、mimic-NC质粒、TPM3质粒分别或联合转入甲状腺癌细胞,RT-qPCR检测miR-145-5p与TPM3 mRNA的表达,双荧光素酶报告检测靶向关系,Transwell法检测细胞侵袭能力,划痕实验检测细胞迁...     

MiR-515-5p通过调控硫酸软骨素蛋白聚糖4表达对卵巢癌A2780细胞增殖和转移的影响及其机制

目的 探讨miR-515-5p对硫酸软骨素蛋白聚糖4(CSPG4)的靶向调控作用,以及对卵巢癌细胞系A2780细胞增殖和转移的影响.方法 通过生物信息学工具预测miR-515-5p的靶基因.Real-time PCR和Western blotting法检测65例卵巢癌组织和与其对应的癌旁组织中miR-515-5p和CS...     

LncRNA DSCAM-AS1通过靶向miR-627-3p调控皮肤鳞状细胞癌增殖、侵袭和迁移

目的 探讨长链非编码RNA(LncRNA)唐氏综合征细胞粘附分子反义1(DSCAM-AS1)靶向miR-627-3p对人皮肤鳞状细胞癌增殖和侵袭能力的影响和分子机制.方法 采用实时荧光定量PCR(RT-qPCR)检测DSCAM-AS1和miR-627-3p在人永生化表皮细胞HaCaT和3种皮肤鳞状细胞癌细胞(SCC13...     

慢病毒介导的c-metRNA干扰对人乳头状甲状腺癌K1细胞生物学行为的影响

目的: 探讨c-Met在乳头状甲状腺癌(PTC)中的表达;构建针对人c-met基因的RNA干扰(RNAi)慢病毒载体,并观察其对K1细胞c-met基因的沉默效应及对细胞生物学行为的影响。方法: 免疫组化方法检测35例乳头状甲状腺癌及25例良性甲状腺疾病手术切除标本中c-Met的表达;构建人c-met基因的RNAi慢病毒载体,应用荧光定量RT-PCR与Western blotting检测其对c-met的干扰效率,应用克隆形成实验、流式细胞术、划痕实验和Transwell实验检测其对细胞克隆形成、周期、迁移、侵袭能力的影响,应用裸鼠模型评估RNA干扰后细胞成瘤能力的影响。结果: c-Met在PTC中的表达明显高于良性甲状腺组织;成功构建了c-met RNAi慢病毒载体,RT-PCR及Western blotting实验显示其对乳头状甲状腺癌K1细胞c-met mRNA 及蛋白表达的抑制均较明显;克隆形成实验显示c-met RNAi慢病毒载体能够抑制K1细胞的克隆形成能力;流式细胞术检测显示c-met RNAi慢病毒载体能够减少S细胞比列;划痕实验及Transwell实验显示c-met RNAi慢病毒载体能够抑制细胞迁移和侵袭;裸鼠成瘤实验显示RNA干扰后细胞的成瘤能力降低。结论: c-met RNAi慢病毒载体能够抑制K1细胞的克隆形成能力、细胞周期进程、迁移、侵袭及成瘤能力。