血清长链非编码RNA MALAT1和AFAP1-AS1与鼻咽癌临床病理特征和预后的关系

目的 探讨血清长链非编码RNA(lncRNA)MALAT1和AFAP1-AS1与鼻咽癌临床病理特征和预后的关系。方法 2013年4月—2015年6月在我院经病理证实的鼻咽癌患者136例为鼻咽癌组,同期选择我院门诊健康体检者54例为对照组,实时荧光逆转录法分析MALAT1和AFAP1-AS1的表达;采用χ²检验分析MALAT1和AFAP1-AS1表达与临床病理特征的关系;Log-rank检验分析血清MALAT1和AFAP1-AS1不同表达水平患者的预后差异。结果 与对照组比较,鼻咽癌组MALAT1和AFAP1-AS1表达水平明显升高,差异有统计学意义(P＜0.001);MALAT1和AFAP1-AS1表达与年龄无关(P＞0.05);肿瘤最大径≥5 cm、病理学分期越高、TNM分期越高、浸润深度越深、有淋巴血管间隙浸润、有淋巴结转移、有复发的鼻咽癌患者MALAT1和AFAP1-AS1高表达率升高(P＜0.05);MALAT1和AFAP1-AS1低表达组2年生存率及生存期均明显高于MALAT1和AFAP1-AS1高表达组(P＜0.001);多因素Cox逐步回归分析,结果发现MALAT1低表达(HR=0.52,95% CI:0.37~0.81)和AFAP1-AS1低表达(HR=0.56,95% CI:0.51~0.83)为鼻咽癌患者预后的独立保护因素(P＜0.001)。结论 鼻咽癌患者血清lncRNA MALAT1、AFAP1-AS1水平升高,且与鼻咽癌恶性进展有关;鼻咽癌患者血清MALAT1、AFAP1-AS1低表达患者预后良好;MALAT1、AFAP1-AS1可能作为诊断鼻咽癌的新型标志物。     

长链非编码RNA AFAP1-AS1 在胃癌组织中的表达及其临床意义

目的:探讨长链非编码RNA (long non-coding RNA,lncRNA)肌动蛋白纤维相关蛋白-1反义RNA1(actin filament-associated protein 1-antisense RNA1,AFAP1-AS1 RNA1)在胃癌组织中的表达情况及其临床意义.方法:采用Real-time PCR方法检测2010年1月至2014年12月宜昌市第二人民医院及三峡大学仁和医院手术切除的274例胃癌组织及相应癌旁正常胃组织中AFAP1-AS1的表达,并分析AFAP1-AS1表达量与临床及病理特征的关系.结果:AFAP1-AS1在胃癌组织比癌旁正常组织显著高表达(P＜0.01).AFAP1-AS1在早期胃癌组织中平均表达量明显低于进展期胃癌(P＜0.01).在不同病理类型胃癌中,AFAP1-AS1的表达量没有差异(P＞0.05).AFAP1-AS1表达量和胃癌淋巴侵袭或远处转移密切相关,在伴有淋巴结侵袭或远处转移的胃癌组织中,AFAP1-AS1明显高表达(P＜0.01).结论:AFAP1-AS1可能是胃癌发生发展的一个重要因素;有望成为新的胃癌预后标志物,用于胃癌的临床诊断和预后判断.     

长链非编码 RNA AFAP1－AS1在乳腺癌中的表达及临床意义

目的：探讨长链非编码 RNA（long non －coding RNA,lncRNA）肌动蛋白纤维相关蛋白1－反义 RNA1（actinfilament －associated protein 1－antisense RNA1,AFAP1－AS1）在乳腺癌肿瘤组织中的表达情况及其临床意义。方法：采用荧光定量 PCR 方法检测76例乳腺癌组织及其对应癌旁组织中 AFAP1－AS1的表达情况。选取表达差异最大的5对组织,结合核浆分离的方法,检测 AFAP1－AS1在乳腺癌细胞中的表达位置。分析AFAP1－AS1表达与乳腺癌主要临床病理特征及患者生存曲线的相关性。通过 siRNA 干扰 AFAP1－AS1在乳腺癌细胞 SKBR －3、MCF －7中的表达,MTT 法检测其表达对乳腺癌细胞增殖的影响。结果：AFAP1－AS1在乳腺癌组织中的表达水平相较癌旁组织明显下调（P ＜0．05）,并且这一表达差异主要发生在细胞质。沉默AFAP1－AS1的表达会促进乳腺癌细胞增殖。同时,AFAP1－AS1在乳腺癌组织中的表达差异与临床分期和淋巴结转移有关（P ＜0．05）,且与患者生存率也明显相关（P ＜0．05）。结论：lncRNA AFAP1－AS1在乳腺癌组织中表达下调,影响乳腺癌细胞增殖,可能与乳腺癌的发生和发展有关,可能成为新的乳腺癌分子标志物。     

Silencing of lncRNA AFAP1-AS1 Inhibits Cell Growth and Metastasis in Clear Cell Renal Cell Carcinoma

The lncRNA AFAP1-AS1, oriented from an antisense direction to the protein-coding gene AFAP1 in the opposite strand, was upregulated in a variety of tumors and associated with poor prognosis, including lung cancer, breast cancer, ovarian cancer, and so on. However, the biological role of AFAP1-AS1 in clear cell renal cell carcinoma (ccRCC) is still unknown. We observed that AFAP1-AS1 expression was significantly upregulated in ccRCC tissues and that patients with high-level expression of AFAP1-AS1 had a shorter overall survival. Knockdown of AFAP1-AS1 markedly suppressed the progression of proliferation, invasion, migration, and EMT in ccRCC cells. Downregulation of AFAP1-AS1 resulted in an increase in E-cadherin and a decrease in vimentin. Noticeably, we found that PTEN has a negative correlation with the lncRNA AFAP1-AS1 expression. Further studies verified that PTEN deficiency effectively attenuated the ability of AFAP1-AS1 in promoting ccRCC cell proliferation, invasion, migration, and EMT. Moreover, the similar biological response of silencing AFAP1-AS1 was observed in our ccRCC mice model. Knockdown of AFAP1-AS1 evidently suppressed tumor growth. Taken together, our results provide the evidences that silencing of AFAP1-AS1 inhibits cell proliferation, EMT, and metastasis through PTEN-dependent signaling, and our findings elucidate a novel potential therapeutic target or biomarker for the treatment of ccRCC.     

长链非编码RNA AFAP1-AS1在实体肿瘤中的作用与分子机制

长链非编码RNA（LncRNA）是一种长度超过200个核苷酸的内源RNA。大量研究表明,LncRNA可参与多种生物过程,如转录激活和干扰、细胞分化、增殖、迁移、侵袭和凋亡。近年来许多研究表明LncRNA在人类癌症中作为致癌基因或肿瘤抑制基因发挥着重要作用。大量新研究表明LncRNA肌动蛋白丝相关蛋白1反义RNA1（AFAP1-AS1）参与了多种恶性肿瘤的发生发展。已证实AFAP1-AS1的失调表达与肿瘤发生和肿瘤进展相关;AFAP1-AS1可能成为肿瘤诊断和肿瘤治疗靶点的新型潜在分子生物标志物。在本篇综述中,我们总结了现阶段关于AFAP1-AS1在人类肿瘤发生和发展过程中的生物学功能和分子机制的研究问题。     

长链非编码RNA AFAP1-AS1通过PTEN/p-AKT信号通路调控结直肠癌细胞增殖的分子机制研究

目的 探讨长链非编码RNA(lncRNA)肌动蛋白纤维相关蛋白1-反义RNA1(Actin filament-associatedprotein1-antisenseRNA1,AFAP1-AS1)调控结直肠癌(Colorectal cancer,CRC)细胞增殖的分子机制。方法 收集2014年7月—2018年6月深圳市第二人民医院消化内科和胃肠外科诊治的38例正常人及38例CRC患者的粪便标本,用Real time-PCR检测lncRNA AFAP1-AS1表达,同时检测人正常结肠上皮细胞株NCM460、人结直肠癌细胞株SW620和HCT116中lncRNA AFAP1-AS1的表达;将靶向siRNA转染到CRC细胞株SW620和HCT116中抑制AFAP1-AS1的表达;通过MTT测定si-AFAP1-AS1转染对CRC细胞增殖的影响;应用免疫印迹检测Cleaved caspase 3、Bcl-2、Bax、p-AKT、total-AKT和PTEN的水平。结果 与正常人相比,CRC患者粪便中AFAP1-AS1的表达显著上升(P＜0.01);与NCM460细胞相比,SW620和HCT116细胞中AFAP1-AS1的表达也显著升高(P＜0.01);si-AFAP1-AS1转染抑制SW620和HCT116的细胞生长(P＜0.01)。与NCM460细胞相比,si-AFAP1-AS1干扰上调了SW620和HCT116细胞中Cleaved caspase 3和促凋亡蛋白Bax的表达水平(P＜0.05),下调了抗凋亡蛋白Bcl-2的表达水平(P＜0.001);此外,si-AFAP1-AS1干扰降低了CRC细胞中p-AKT的蛋白水平,并增加了PTEN的表达(P＜0.01)。结论 正常人和CRC患者粪便中lncRNA AFAP1-AS1表达的差异有助于CRC的早期诊断,且lncRNA AFAP1-AS1在CRC细胞中表达上调,并通过PTEN/p-AKT信号通路调节CRC细胞的增殖和凋亡。lncRNA AFAP1-AS1有望成为CRC早期诊断的分子靶标。     

lncRNA AFAP1-AS1在视网膜母细胞瘤组织中的表达及其临床意义

目的:探讨长链非编码RNA (lncRNA)肌动蛋白纤维相关蛋白1-反义RNA1(AFAP1-AS1)在视网膜母细胞瘤(RB)组织中表达的临床意义及相关机制.方法:收集2015年12月至2019年12月于本院行眼球摘除术的RB患儿36例,取患儿RB组织以及癌旁组织作为研究样本,实时荧光定量PCR(qRT-PCR)法检测...     

Long noncoding RNA actin filament‐associated protein 1 antisense RNA 1 promotes malignant phenotype through binding with lysine‐specific demethylase 1 and repressing HMG box‐containing protein 1 in non‐small‐cell lung cancer

The number of documented long noncoding RNAs (lncRNAs) has dramatically increased, and their biological functions and underlying mechanisms in pathological processes, especially cancer, remain to be elucidated. Actin filament‐associated protein 1 antisense RNA 1 (AFAP1‐AS1) is a 6810‐nt lncRNA located on chromosome 4p16.1 that was first reported to be upregulated in esophageal adenocarcinoma tissues and cell lines. Here we reported that AFAP1‐AS1, recruiting and binding to lysine‐specific demethylase 1 (LSD1), was generally overexpressed in human non‐small‐cell lung cancer (NSCLC) tissues using quantitative real‐time PCR. Higher AFAP1‐AS1 expression was significantly correlated with larger tumor size (P = .008), lymph node metastasis (P = .025), higher TNM stage (P = .024), and worse overall survival in NSCLC patients. In vitro experiments revealed that AFAP1‐AS1 downregulation inhibited cell migration and induced apoptosis; AFAP1‐AS1 knockdown also hindered tumorigenesis in vivo. Moreover, mechanistic investigations including RNA immunoprecipitation and ChIP assays validated that AFAP1‐AS1 repressed HMG box‐containing protein 1 (HBP1) expression by recruiting LSD1 to the HBP1 promoter regions in PC‐9 and H1975 cells. Furthermore, HBP1 functions as a tumor suppressor, and its ectopic expression hindered cell proliferation. Rescue assays determined that the oncogenic effect of AFAP1‐AS1 is partially dependent on the epigenetic silencing of HBP1. In conclusion, our results indicate that AFAP1‐AS1 is carcinogenic and that the AFAP1‐AS1/LSD1/HBP1 axis could constitute a new therapeutic direction for NSCLC.     

The role of AFAP1-AS1 in mitotic catastrophe and metastasis of triple-negative breast cancer cells by activating the PLK1 signaling pathway

Triple-negative breast cancer (TNBC) is characterized by fast growth, high metastasis, high invasion, and a lack of therapeutic targets. Mitosis and metastasis of TNBC cells are two important biological behaviors in TNBC malignant progression. It is well known that the long noncoding RNA AFAP1-AS1 plays a crucial role in various tumors, but whether AFAP1-AS1 is involved in the mitosis of TNBC cells remains unknown. In this study, we investigated the functional mechanism of AFAP1-AS1 in targeting Polo-like Kinase 1 (PLK1) activation and participating in mitosis of TNBC cells. We detected the expression of AFAP1-AS1 in the TNBC patient cohort and primary cells by in situ hybridization (ISH), northern blot, fluorescent in situ hybridization (FISH) and cell nucleus/cytoplasm RNA fraction isolation. High AFAP1-AS1 expression was negatively correlated with overall survival (OS), disease-free survival (DFS), metastasis-free survival (MFS) and recurrence-free survival (RFS) in TNBC patients. We explored the function of AFAP1-AS1 by transwell, apoptosis, immunofluorescence (IF) and patient-derived xenograft (PDX) models in vitro and in vivo. We found that AFAP1-AS1 promoted TNBC primary cell survival by inhibiting mitotic catastrophe and increased TNBC primary cell growth, migration and invasion. Mechanistically, AFAP1-AS1 activated phosphorylation of the mitosis-associated kinase PLK1 protein. Elevated levels of AFAP1-AS1 in TNBC primary cells increased PLK1 pathway downstream gene expression, such as CDC25C, CDK1, BUB1 and TTK. More importantly, AFAP1-AS1 increased lung metastases in a mouse metastasis model. Taken together, AFAP1-AS1 functions as an oncogene that activates the PLK1 signaling pathway. AFAP1-AS1 could be used as a potential prognostic marker and therapeutic target for TNBC.     

长链非编码RNA AFAP1-AS1在癌症中作用及其机制的研究进展

癌症一直是全球非感染性疾病死亡的主要原因之一,癌症的有效筛查和早期诊断、早期治疗一直以来是临床的一大难点,鉴定新的生物标志物或分子靶标以改善癌症患者的诊断和治疗刻不容缓.近年来研究发现,长链非编码RNA(long non-coding RNA,lncRNA)是一系列生物行为和包括肿瘤在内的疾病发生、发展的主要调节因子,...     

Single-nucleotide polymorphism rs4142441 and MYC co-modulated long non-coding RNA OSER1-AS1 suppresses non-small cell lung cancer by sequestering ELAVL1

Single-nucleotide polymorphisms (SNP) and long non-coding RNAs (lncRNAs) have been involved in the process of lung cancer. Following clues given by lung cancer risk-associated SNP, we aimed to find novel functional lncRNAs as candidate targets in lung cancer. We identified a lncRNA Oxidative Stress Responsive Serine Rich 1 Antisense RNA 1 (OSER1-AS1) through a lung cancer risk-associated SNP rs4142441. OSER1-AS1 was down-regulated in tumor tissue and its low expression was significantly associated with poor overall survival among non-smokers in non-small cell lung cancer (NSCLC) patients. Gain- and loss-of-function studies showed that OSER1-AS1 acted as a tumor suppressor by inhibiting lung cancer cell growth, migration and invasion in vitro. Xenograft tumor assays and a metastasis mouse model confirmed that OSER1-AS1 suppressed tumor growth and metastasis in vivo. The promoter of OSER1-AS1 was repressed by MYC, and the 3′-end of OSER1-AS1 was competitively targeted by microRNA hsa-miR-17-5p and RNA-binding protein ELAVL1. Our results indicated that OSER1-AS1 exerted tumor-suppressive functions by acting as an ELAVL1 decoy to keep it away from its target mRNAs. Our findings characterized OSER1-AS1 as a new tumor-suppressive lncRNA in NSCLC, suggesting that OSER1-AS1 may be suitable as a potential biomarker for prognosis, and a potential target for treatment.     

High expression of long non‐coding RNA AFAP1‐AS1 predicts chemoradioresistance and poor prognosis in patients with esophageal squamous cell carcinoma treated with definitive chemoradiotherapy

To evaluate the clinical significance of lncRNAs in the resistance to cisplatin‐based chemoradiotherapy in esophageal squamous cell carcinoma (ESCC). We focused on lncRNAs which were frequently reported in ESCC or were involved in chemoradiotherapy resistance. LncRNA expressions were examined in paired cisplatin‐resistant and parental ESCC cell lines. Dysregulated lncRNAs were further measured in 162 pretreatment biopsy specimens of ESCC who received definitive chemoradiotherapy (dCRT). Then the correlations between lncRNA expression and response to dCRT and prognosis were analyzed. Three lncRNAs (AFAP1‐AS1, UCA1, HOTAIR) were found to be deregulated in cisplatin‐resistant cells compared with their parent cells. AFAP1‐AS1 was significantly up‐regulated in tumor tissues compared with adjacent normal tissues (P = 0.006). Furthermore, overexpression of AFAP1‐AS1 was closely associated with lymph node metastasis (P < 0.001), distant metastasis (P = 0.016), advanced clinical stage (P = 0.002), and response to dCRT (P < 0.001). Kaplan–Meier survival analysis revealed that high expression of AFAP1‐AS1 was significantly associated with shorter progression free survival (PFS) (median, 15 months vs. 27 months, P < 0.001) and overall survival (OS) (median, 29 months vs. 42 months, P < 0.001). In the multivariate analysis, high expression of AFAP1‐AS1 was found to be an independent risk factor to predict poor PFS (HR, 1.626; P = 0.027) and OS (HR, 1.888; P = 0.004). Thus, high expression of AFAP1‐AS1 could serve as a potential biomarker to predict tumor response and survival. Determination of this lncRNA expression might be useful for selection ESCC patients for dCRT. © 2016 The Authors. Molecular Carcinogenesis published by Wiley Periodicals, Inc.     

胃癌组织中lncRNA FOXF1-AS1的表达及其与临床病理特征及预后的关系

目的:探究胃癌组织中长链非编码叉头蛋白F1-反义RNA1（lncRNA FOXF1-AS1）表达水平及其与临床病理特征及预后的关系。方法:以2014年2月至2015年7月于本院就诊胃癌患者87例为研究对象。术中取患者胃癌组织及癌旁（＞5 cm）组织,荧光定量PCR检测胃癌组织及癌旁组织中lncRNA FOXF1-AS1表达水平,收集分析患者临床资料及临床病理特征,Kaplan-Meier分析胃癌患者3年生存情况,COX回归分析影响胃癌不良预后发生的危险因素。结果:胃癌组织中lncRNA FOXF1-AS1表达水平显著低于癌旁组织（P＜0.05）;根据lncRNA FOXF1-AS1表达平均值将患者分为高表达组和低表达组,lncRNA FOXF1-AS1表达水平与胃癌患者浸润深度、淋巴结转移、TNM分期有关（P＜0.05）,与患者年龄、病理类型、肿瘤直径大小无关（P＞0.05）;Kaplan-Meier分析结果显示lncRNA FOXF1-AS1高表达患者3年无进展生存率和总生存率显著高于lncRNA FOXF1-AS1低表达组（P＜0.05）;COX多因素分析结果显示肿瘤淋巴转移、lncRNA FOXF1-AS1表达水平是影响胃癌患者预后的独立危险因素（P＜0.05）。结论:lncRNA FOXF1-AS1在胃癌组织中表达下调,与胃癌患者浸润深度、淋巴结转移及生存情况有关,是影响患者预后的独立危险因素,可作为患者预后判断的参考指标。     

lncRNA NUP50-AS1 在食管鳞癌组织中的表达及其对Eca109 细胞恶性生物学行为的影响

目的:探讨长链非编码RNA（long non-coding RNA, lncRNA）NUP50-AS1 在食管鳞状细胞癌（esophageal squamous cell cancer, ESCC）组织及细胞株中的表达及其对人食管癌Eca109 细胞增殖、迁移和侵袭的影响。方法：选取自2015 年1 月至2016 年12 月河北医科大学第四医院生物标本库的49 例ESCC手术患者的癌组织和相应癌旁组织,qRT-PCR检测ESCC癌组织、癌旁组织及5 种食管癌细胞株（TE1、TE13、Eca109、Kyse150 和Kyse170）中NUP50-AS1 表达水平。shRNA 转染NUP50-AS1 后,选用sh2 -NUP50-AS1 进行后续功能实验。采用MTS法、克隆形成实验检测敲减NUP50-AS1 表达对Eca109 细胞增殖的影响,划痕实验检测敲减NUP50-AS1 表达对细胞迁移的影响,Transwell 小室实验检测敲减NUP50-AS1 表达对细胞侵袭的影响。结果：NUP50-AS1 在ESCC组织中的相对表达量显著高于癌旁组织(2.003±0.870 vs 1.000±0.000,P<0.05）;NUP50-AS1 在ESCC组织中的表达水平与淋巴结转移及TNM分期相关（均P<0.01）,NUP50-AS1 在5 株食管癌细胞系中相对表达量均明显上调（P<0.05）,其中Eca109 细胞的NUP50-AS1 表达水平最高。转染后,sh2-NUP50-AS1 转染组干扰效率最高,敲低NUP50-AS1 可明显抑制Eca109 细胞增殖、迁移和侵袭能力。结论：ESCC组织中lncRNA NUP50-AS1 表达明显高于癌旁组织,且与癌症分期和淋巴结转移有关,敲减其表达明显抑制食管癌细胞增殖、迁移和侵袭能力,NUP50-AS1 的高表达可能与ESCC的发生发展密切相关。     

长链非编码RNA PCBP1-AS1在乳腺癌组织中的表达及临床意义

目的:研究多聚胞嘧啶结合蛋白1反义长链非编码RNA（lncRNA PCBP1-AS1）在乳腺癌组织中的表达及临床意义。方法:选取2013年5月至2016年4月在本院进行手术治疗的105例乳腺癌患者作为研究对象,将切除的癌组织作为试验组,同时取同一患者的癌旁（距肿瘤边缘＞2 cm）组织作为对照组。用实时荧光定量PCR（qRT-PCR）检测lncRNA PCBP1-AS1表达情况;分析lncRNA PCBP1-AS1与乳腺癌病理参数关系;分析lncRNA PCBP1-AS1表达情况对乳腺癌患者生存情况的影响;Cox回归分析影响乳腺癌的预后因素。结果:试验组lncRNA PCBP1-AS1表达明显低于对照组（P<0.05）;乳腺癌患者癌组织中lncRNA PCBP1-AS1表达水平与患者年龄、肿瘤直径、绝经情况和病理类型相关性不明显（P>0.05）,与淋巴结转移和TNM分期有关（P<0.05）;绘制乳腺癌患者术后36个月生存曲线,lncRNA PCBP1-AS1高表达患者的总生存率明显高于低表达患者（P<0.05）;对lncRNA PCBP1-AS1表达、淋巴结转移和TNM分期进行Cox回归分析,显示lncRNA PCBP1-AS1表达是影响乳腺癌患者预后的独立保护因素,TNM分期是影响乳腺癌患者预后的独立危险因素。结论:乳腺癌患者癌组织中lncRNA PCBP1-AS1呈低表达,其表达水平与淋巴结转移和TNM分期有关,lncRNA PCBP1-AS1表达是乳腺癌预后独立保护因素,可作为乳腺癌预后判断指标之一,有望成为乳腺癌治疗的潜在靶点。     

LncRNA DPP10-AS1 promotes malignant processes through epigenetically activating its cognate gene DPP10 and predicts poor prognosis in lung cancer patients

Objective:The purpose of this study was to explore the function and gene expression regulation of the newly identified lncRNA DPP10-AS1 in lung cancer, and its potential value as a prognostic biomarker.Methods:qRT-PCR and Western blot were conducted to detect the expression of DDP10-AS1 and DPP10 in lung cancer cell lines and tissues. The effects of DDP10-AS1 on DPP10 expression, cell growth, invasion, apoptosis, and in vivo tumor growth were investigated in lung cancer cells by Western blot, rescue experiments, colony formation, flow cytometry, and xenograft animal experiments.Results:The novel antisense lncRNA DPP10-AS1 was found to be highly expressed in cancer tissues (P < 0.0001), and its upregulation predicted poor prognosis in patients with lung cancer (P = 0.0025). Notably, DPP10-AS1 promoted lung cancer cell growth, colony formation, and cell cycle progression, and repressed apoptosis in lung cancer cells by upregulating DPP10 expression. Additionally, DPP10-AS1 facilitated lung tumor growth via upregulation of DPP10 protein in a xenograft mouse model. Importantly, DPP10-AS1 positively regulated DPP10 gene expression, and both were coordinately upregulated in lung cancer tissues. Mechanically, DPP10-AS1 was found to associate with DPP10 mRNA but did not enhance DPP10 mRNA stability. Hypomethylation of DPP10-AS1 and DPP10 contributed to their coordinate upregulation in lung cancer.Conclusions:These findings indicated that the upregulation of the antisense lncRNA DPP10-AS1 promotes lung cancer malignant processes and facilitates tumorigenesis by epigenetically regulating its cognate sense gene DPP10. DPP10-AS1 may serve as a candidate prognostic biomarker and a potential therapeutic target in lung cancer.     

长链非编码RNA ZEB1-AS1促进食管鳞癌侵袭转移

背景与目的：长链非编码RNA（long non-coding RNA,lncRNA）锌指E-盒结合同源异形盒1-反义链1（Zinc finger E-box binding homeobox 1 antisense 1,ZEB1-AS1）在多种肿瘤中高表达,与肿瘤患者临床病理学特征及预后相关,但其在食管鳞癌（esophageal squamous cell carcinoma,ESCC）中的作用及其机制尚不清楚。从细胞与分子生物学水平探讨lncRNA ZEB1-AS1在ESCC细胞侵袭转移中的作用。方法：通过实时荧光定量聚合酶链反应（real-time fluorescence quantitative polymerase chain reaction,RTFQ-PCR）方法检测9株ESCC细胞株中lncRNA ZEB1-AS1的表达水平,筛选出一株高表达细胞株。采用小干扰RNA（small interference RNA,siRNA）转染Eca-109细胞,分成干扰组（siZEB1-AS1）、干扰对照组（siNC）和空白组（Eca-109）。采用RTFQ-PCR方法检测lncRNA ZEB1-AS1的表达水平,采用细胞计数试剂盒（cell counting kit-8,CCK-8）实验检测细胞增殖能力情况,采用划痕实验和Transwell实验检测细胞迁移和侵袭能力情况,采用RTFQ-PCR方法和蛋白质印迹法（Western blot）检测ZEB1的表达水平。结果：9株ESCC细胞株中,Eca-109细胞中lncRNA ZEB1-AS1表达水平最高。siRNA 抑制lncRNA ZEB1-AS1表达,降至对照组的57%。与对照组细胞相比,lncRNA ZEB1-AS1不影响Eca-109细胞增殖,但是能显著促进Eca-109细胞迁移和侵袭。lncRNA ZEB1-AS1上调ZEB1 mRNA和蛋白的表达。结论：lncRNA ZEB1-AS1通过上调ZEB1促进ESCC迁移、侵袭,lncRNA ZEB1-AS1/ZEB1或许可以作为ESCC治疗的潜在靶点。     

沉默GCB型弥漫大B细胞淋巴瘤细胞中AFAP1-AS1的表达对细胞增殖和凋亡的影响

目的:探讨沉默GCB弥漫型大B细胞淋巴瘤（diffuse large B cell lymphoma,DLBCL）中AFAP1-AS1的表达对细胞增殖和凋亡的影响。方法:培养GCB-DLBCL细胞至对数生长期后转染OCI-Ly1细胞系,建立的GCB-DLBCL细胞系对AFAP1-AS1表达进行沉默;实验设立3组,实验组为腺病毒感染细胞,sh-NC无关序列腺病毒感染细胞组为无关序列对照组,未感染腺病毒细胞组为空白组,应用PCR法检测AFAP1-AS1表达水平、CCK-8法测定细胞增殖情况、流式细胞术检测细胞凋亡情况,对比检测结果。结果:AFAP1-AS1表达水平检测结果显示:三种shRNA序列干扰效率均较无关序列对照组（sh-NC）强,差异有统计学意义（P＜0.05）;采用CCK-8法检测各组细胞凋亡情况,结果显示:经腺病毒sh3-AFAP1-AS1感染后,OCI-Ly1细胞系中实验组细胞吸光度较无关序列对照组和空白组显著降低,下调AFAP1-AS1可抑制GCB-DLBCL细胞的增殖（P＜0.05）;采用流式细胞仪检测各组细胞凋亡情况,结果显示:经sh3-AFAP1-AS1和sh-NC转染后,OCI-Ly1细胞实验组凋亡率明显高于无关序列对照组和空白组,下调AFAP1-AS1可诱导GCB-DLBCL细胞凋亡（P＜0.05）。结论:沉默GCB-DLBCL细胞中的AFAP1-AS1表达能有效抑制细胞增殖,诱导细胞凋亡,或可作为GCB-DLBCL治疗的靶目标。