Combination of small interfering RNAs mediates greater suppression on hepatitis B virus cccDNA in HepG2.2.15 cells

AIM： To observe the inhibition of hepatitis B virus （HBV） replication and expression in HepG2.2.15 cells by combination of small interfering RNAs （siRNAs）. METHODS： Recombinant plasmid psiI-HBV was constructed and transfected into HepG2.2.15 cells. At 48 h, 72 h and 96 h after transfection, culture media were collected and cells were harvested for HBV replication assay. HBsAg and HBeAg in the cell culture medium were detected by enzyme-linked immunoadsorbent assay （ELISA）. Intracellular viral DNA and covalently closed circular DNA （cccDNA） were quantified by real-time polymerase chain reaction （PCR）. HBV viral mRNA was reverse transcribed and quantified by reverse-transcript PCR （RT-PCR）. RESULTS： siRNAs showed marked anti-HBV effects. siRNAs could specifically inhibit the expression of HBsAg and the replication of HBV DNA in a dosedependent manner. Furthermore, combination of siRNAs, compared with individual use of each siRNA, exerted a stronger inhibition on antigen expression and viral replication. More importantlycombination of siRNAs significantly suppressed HBV cccDNA amplification. CONCLUSION： Combination of siRNAs mediates a stronger inhibition on viral replication and antigenexpression in HepG2.2.15 cells, especially on cccDNA amplification.

Therapeutic potential of small interfering RNAs/micro interfering RNA in hepatocellular carcinoma

Hepatocellular carcinoma(HCC) is the predominant form of primary liver cancer and represents the third leading cause of cancer-related death worldwide. Current available therapeutic approaches are poorly effective,especially for the advanced forms of the disease. In the last year,short double stranded RNA molecules termed small interfering RNAs(si RNAs) and micro interfering RNAs(mi RNA),emerged as interesting molecules with potential therapeutic value for HCC. The practical use of these molecules is however limited by the identification of optimal molecular targets and especially by the lack of effective and targeted HCC delivery systems. Here we focus our discussion on the most recent advances in the identification of si RNAs/mi RNAs molecular targets and on the development of suitable si RNA/mi RNAs delivery systems.

KNOCKDOWN OF SURVIVIN EXPRESSION BY SMALL INTERFERING RNA SUPPRESSES PROLIFERATION OF TWO HUMAN CANCER CELL LINES

Objective To construct an expression vector of small interfering RNA （siRNA） against survivin and observe its effects on survivin expression and proliferation of human pancreatic cancer cell line PC-2 and breast cancer cell line MCF-7. Methods Constructed an expression vector of siRNA against survivin and transfected it into PC-2 and MCF-7 cells using lipofectamine^TM 2000. The expression of survivin was detected by semi-quanfifive RT-PCR and immunohistochemistry, and its effects on proliferation of PC-2 and MCF-7 cells were detected by MTT assay. Results The introduction of sequence-specific siRNA could efficiently suppress survivin expression at both mRNA and protein levels in the two cancer cell lines. In PC-2 cells, the expression inhibition rates were 81.25% at mRNA level and 74.24% at protein level In MCF-7 cells, the expression inhibition rates were 64.91% at mRNA level and 79. 72% at protein level The proliferation of PC-2 and MCF-7 cells was also suppressed, and24 and 48 hours after the cells were reseeded, the proliferation inhibition rates of PC-2 cells were 28. 00% and 33. 38%, and that of MCF-7 cells were 31.58% and 33.02%, respectively. Conclusions The expression vector of siRNA against survivin can block survivin expression in PC-2 and MCF-7 cells efficiently and specifically. Down regulation of survivin expression can suppress proliferation of PC-2 and MCF-7 cells. Survivin RNAi may have potential value in gene therapy of human cancers.

The influence of small interfering RNA on the expression of Survivin in human glioma cells

Objective This study aims to investigate the feasibility of knockdown of Survivin gene with small interfering RNA and to observe the apoptosis in gliomas which is influenced by siRNA. Methods Survivin specific siRNA oligonucleotides were designed and synthesized artificially. This siRNA

miRNA对褐飞虱鞘脂质代谢基因表达的影响及沉默NlSPT1和Nl SMase4的small RNA分析

【背景】鞘脂质是第二大类膜脂,作为信号转导物质参与细胞生长发育、繁殖及凋亡等过程。鞘脂质代谢酶调控鞘脂质代谢以维持生物体内代谢的稳态。【目的】以重要水稻害虫褐飞虱(Nilaparvata lugens)为研究对象,通过RNA干扰(RNA interference,RNAi)技术检测微小RNA(microRNA,miRNA)生物合成通路核心组分NlAgo1、NlDicer1和NlDrosha沉默后褐飞虱鞘脂质代谢通路相关基因的相对转录水平,结合small RNA测序分析沉默丝氨酸棕榈酰转移酶1(serine palmitoyltransferase 1,SPT1)和鞘磷脂酶4(sphingomyelinase 4,SMase4)基因的差异miRNA,探究miRNA在褐飞虱鞘脂质代谢中的作用,为害虫防治提供新的分子靶标。【方法】利用RNAi技术,分别对羽化后第1天(1 PAE,post adult eclosion)的雌成虫NlAgo1、NlDicer1和NlDrosha进行dsRNA注射,以ds GFP为对照;分别解剖羽化后第5天的卵巢组织,以β-actin作为内参基因,采用实时荧光定量PCR(qRT-PCR)方法检测NlAgo1、NlDicer1和NlDrosha沉默后鞘脂质代谢通路相关基因的表达量变化;根据已有的小RNA文库联合miRNA-靶基因预测软件对可能调控NlSPT1和NlSMase4表达的miRNA进行预测;通过small RNA测序技术对沉默NlSPT1和NlSMase4的差异miRNA进行鉴定和靶基因富集性分析。【结果】与对照组相比,沉默NlAgo1、NlDicer1或NlDrosha显著上调卵巢中NlSPT1和NlSMase4等鞘脂质代谢通路相关基因的表达;靶基因预测结果显示,有6条miRNA能与NlSPT1结合,13条miRNA能与NlSMase4结合;沉默NlSPT1和NlSMase4的差异miRNA的靶基因显著富集在细胞核和蛋白质结合等生物学过程以及内吞作用、内质网加工、MAPK信号通路、TOR信号通路、凋亡、脂质代谢等代谢通路。【结论】NlAgo1、NlDicer1和NlDrosha依赖性的miRNA通过影响鞘脂质代谢相关基因的表达影响鞘脂质代谢。NlSPT1和NlSMase4沉默引起褐飞虱卵巢miRNA表达水平的改变。研究结果可为基于鞘脂质代谢基因为靶标的害虫防治提供理论依据。

Inhibition of HOXB7 Gene Expression in Melanoma Cells by Small Interfering RNA

Objective： HOXB7 gene is a kind of transcription regulator over-expressed in malignant melanoma （MM） cell lines. It can specifically up-regulate the expression of angiogenic factors and tumor growth factors such as bFGF, GROa, VEGF and induce angiogenesis in melanoma, resulting in the proliferation and metastasis of tumor cells. We designed and synthesized HOXB7 specific siRNA to study its interfering effect on the expressions of HOXB7 and bFGF genes in melanoma A375 cell line and the biologic characteristics of A375 cells. Methods： Three synthesized siRNA with different sequences were separately transfected into A375 cells by lipofecter 2000. The expression of HOXB7 and bFGF mRNA in transfected cells was detected by RT-PCR 24 and 48 hours after transduction. The expression of bFGF protein in the transfected cells were detected by flowcytometry 48 hours after transfection. MTT assay was used to analyze the cell proliferation rate of siRNA transfected cells. Based on the in vitro experiment results, one effective siRNA sequence was selected for the construction of in vivo siRNA expression vector. Then, a malignant melanoma animal model was established. The siRNA expression plasmid was injected into the tumor foci and its influence on the growth and angiogenesis of tumor was observed. Results： The mRNA expressions of both HOXB7 and bFGF genes in the A375 cells reduced significantly 24 and 48 hour after transfection of siRNA. Expression level of the protein of angiogenic factor bFGF induced by HOXB7 gene in siRNA transfected cells was significantly lower than that in control cells 48 hours after transduction. Cell proliferation was also suppressed in siRNA transfected cells. Two of the three siRNA strands showed prominent interference effect. The in vivo study indicated that the tumor size and the microvessel density in the tumor both reduced after injection of HOXB7siRNA plasmid. Conclusion： Down-regulation of HOXB7 gene expression can effectively reduce the expression of angiogenic factor bFGF and the proliferation of MM cells. Besides, the growth and angiogenesis of MM tumor were also inhibited.

Bcl-2 Small Interfering RNA Inhibits the Growth of Human Lymphoma Transplanted Subcutaneously in Nude Mice

OBJECTIVE To investigate whether small hairpin RNA (shRNA)targeting Bcl-2 mRNA could inhibit the growth of lymphomatransplanted subcutaneously in nude mice.METHODS Recombinant Bcl-2 shRNA expression vector withgreen fluorescence protein (GFP) gene was constructed andpreserved in our lab. We evaluated the antitumor effect of the Bcl-2shRNA in vivo which was the model of nude mice bearing Rajicells xenografts. Human Raji cells were injected subcutaneouslyinto nude mice to establish lymphoma models. When thediameters of tumor were above 0.5 cm after Raji cells injection,the mice bearing tumor were randomly divided into four groups:saline control group, negative shRNA group, plasmid vectorgroup, Bcl-2 shRNA group. The polyethylenimine (PEI) was usedto transfect shRNA into tumor. The mixed PEI and shRNA wasinjected into tumors. The growth and size of tumor were observed.Tissue was stained by H&E for its pathological morphology. Theexpression of Bcl-2 mRNA in the tumor mass was detected byreverse transcription polymerase chain reaction (RT-PCR).RESULTS A significant difference in median tumor weightwas observed in mice treated with Bcl-2 shRNA, compared withthose in the groups of negative shRNA or plasmid vector or salinesolution (P< 0.05). Pathological evaluation was completed in allexcised tumors from nude mice bearing Raji cells xenografts.The tumor tissue of the mice treated with Bcl-2 shRNA showedapoptosis, serious necrosis of the cells and inflammatory cellsinfiltration. There was no change in the morphology of cellsamong negative shRNA, plasmid vector and saline solution group.In the group of the Bcl-2 shRNA, the expression levels of Bcl-2mRNA of the tumor tissue were effectively inhibited (P < 0.05).CONCLUSION The shRNA targeting at the Bcl-2 mRNAcould inhibit the growth of human lymphoma transplantedsubcutaneously in nude mice.

Nanoparticles for targeted delivery of therapeutics and small interfering RNAs in hepatocellular carcinoma

Hepatocellular carcinoma(HCC) is the 5th most common malignancy which is responsible for more than half million annual mortalities; also, it is the third leading cause of cancer related death. Unfavorablesystemic side-effects of chemotherapeutic agents and susceptibility to the degradation of small interfering RNAs(si RNAs), which can knock down a specific gene involved in the disease, have hampered their clinical application. So, it could be beneficial to develop an efficient carrier for the stabilization and specific delivery of drugs and si RNA to cells. Targeted nanoparticles have gained considerable attention as an efficient drug and gene delivery system, which is due to their capability in achieving the highest accumulation of cytotoxic agents in tumor tissue, modifiable drug pharmacokinetic- and bio-distribution, improved effectiveness of treatment, and limited sideeffects. Recent studies have shed more light on the advantages of novel drug loaded carrier systems vs free drugs. Most of the animal studies have reported improvement in treatment efficacy and survival rate using novel carrier systems. Targeted delivery may be achieved passively or actively. In passive targeting, no ligand as homing device is used, while targeting is achieved by incorporating the therapeutic agent into a macromolecule or nanoparticle that passively reaches the target organ. However, in active targeting, the therapeutic agent or carrier system is conjugated to a tissue or cell-specific receptor which is overexpressed in a special malignancy using a ligand called a homing device. This review covers a broad spectrum of targeted nanoparticles as therapeutic and nonviral si RNA delivery systems, which are developed for enhanced cellular uptake and targeted gene silencing in vitro and in vivo and their characteristics and opportunities for the clinical applications of drugs and therapeutic si RNA are discussed in this article. Asialoglycoprotein receptors, low-density lipoprotein, ganglioside GM1 cell surface ligand, epidermal growth factor receptor receptors, monoclonal antibodies, retinoic acid receptors, integrin receptors targeted by Arg-Gly-Asp peptide, folate, and transferrin receptors are the most widely studied cell surface receptors which are used for the site specific delivery of drugs and si RNA-based therapeutics in HCC and discussed in detail in this article.

Inhibition of genes expression of SARS coronavirus by synthetic small interfering RNAs

RNA interference (RNAi) is triggered by the presence of a double-stranded RNA (dsRNA), and results in the silencing of homologous gene expression through the specific degradation of an mRNA containing the same sequence. dsRNAmediated RNAi can be used in a wide variety of eucaryotes to induce the sequence-specific inhibition of gene expression.Synthetic 21-23 nucleotide (nt) small interfering RNA (siRNA) with 2 nt 3' overhangs was recently found to mediate efficient sequence-specific mRNA degradation in mammalian cells. Here, we studied the effects of synthetic siRNA duplexes targeted to SARS coronavirus structural proteins E, M, and N in a cell culture system. Among total 26 siRNA duplexes, we obtained 3 siRNA duplexes which could sequence-specifically reduce target genes expression over 80％ at the concentration of 60 nM in Vero E6 cells. The downregulation effect was in correlation with the concentrations of the siRNA duplexes in a range of 0～60 nM. Our results also showed that many inactive siRNA duplexes may be brought to life simply by unpairing the 5' end of the antisense strands. Results suggest that siRNA is capable of inhibiting SARS coronavirus genes expression and thus may be a new therapeutic strategy for treatment of SARS.

Progress of Targeting Transforming Growth Factor-β1 Small Interfering RNA in Liver Fibrosis

Liver fibrosis is a common pathological consequence of a variety of chronic stimuli, including viral, autoimmune, drug-induced, cholestatic and metabolic diseases. Fibrosis is driven by a dynamic process involving increased synthesis of matrix components and a failure of physiological mechanisms of matrix turnover. Activation of hepatic stellate cells(HSCs) remains a central event in fibrosis. HSCs are the main source of extracellular matrix(ECM). Transforming growth factor-beta(TGF-β), which is the fibrogenic master cytokine, can induce the activation of HSCs to produce a large amount of ECM, and is capable of inducing apoptosis of liver cells. RNA interference(RNAi) is a novel gene disruption technology. Studies have shown that small interfering RNA(si RNA) targeting TGF-β1 may inhibit the activation and proliferation of HSCs, suppress ECM synthesis and block liver fibrosis. TGF-β1 si RNA-mediated gene silencing therapy provides a new avenue for liver fibrosis. This review summarizes recent progresses in research on HSCs, TGF-β1 and TGF-β1 si RNA in liver fibrosis.

Impact of Bovine Skeletal Muscle Satellite Cell Differentiation by Small Interfering RNA Targeting Myogenin Gene

To examine the effect of myogenin gene on the differentiation of bovine skeletal muscle satellite cell, we constructed small interfering RNA plasmid vector to obtain myogenin knockdown bovine skeletal muscle cells, then used cell transfection, real time RCR and Western Blot to detect the influence of myogenin to cell differentiation. Results showed that the knockdown of myogenin significantly decreased its expression and other muscle-specific genes. Compared to the control, it could differentiate into few myotubes when challenged by low serum in the medium. These findings provided an important theoretical basis for further explore of the genetic mechanism in adult skeletal muscle, the remedy of muscle injuries and the cultivation of high-yield transgenic cattle.

Effects of Small Interfering RNATargeting Sphingosine Kinase-1 Gene on the Animal Model of Alzheimer's Disease

Summary： Alzheimer＇s disease （AD） is an age-related, progressive neurodegenerative disorder that occurs gradually and results in memory, behavior, and personality changes. Abnormal sphingolipid metabolism was reported in AD previously. This study aimed to investigate whether sphK1 could exacerbate the accumulation of amyloid protein （Aβ） and sharpen the learning and memory ability of the animal model of AD using siRNA interference. An adenovirus vector expressing small interfering RNA （siRNA） against the sphK1 gene （sphKl-siRNA） was designed, and the effects of sphKl-siRNA on the APP/PS1 mouse four weeks after treatment with sphKl-siRNA hippocampal injection were examined. SphK1 protein expression was confirmed by using Western blotting and ceramide content coupled with SIP secretion was evaluated by enzyme-linked immunosorbent assay （ELISA）. Aβ load was detected by immunohistochemical staining and ELISA. Morris water maze was adopted to test the learning and memory ability of the APP/PS 1 mice. A significant difference in the expression of sphK1 protein and mRNA was observed between the siRNA group and the control group. Aβ load in transfected mice was accelerated in vivo, with significant aggravation of the learn- ing and memory ability. The sphKl gene modulation in the All load and the learning and memory ability in the animal model of AD may be important for the treatment of AD.

Silencing invariant chain of DCs enhances Th1 response using small interfering RNA

RNA interference(RNAi),which causes the degradation of any RNA in a sequence specific manner,is a posttranscriptional gene silencing mechanism.Targeting the invariant chain(Ii)in DCs has been used as an approach to enhance antitumor immunity.It is demonstrated in this article that transfection of H-2(K)DCs with siRNA specific for Ii gene can significantly knock down Ii.When exposed to TNF-alpha,immature DCs transfected with Ii siRNA can differentiate into mature DCs without reducing viability or IL-12p70 production.Ii siRNA-treated H-2(K)DCs exhibited an increased allostimulatory capacity in a lymphocyte proliferation assay.Furthermore,Ii siRNA-transfected H-2(K)DCs enhanced Th1 responses by increasing IFN-gamma and decreasing IL-4 production,and much stronger cytotoxic activity was observed when DCs were co-transfected with Ii siRNA and an endogenous tumor antigen in vitro.Our findings indicate that silencing the Ii gene in DCs with siRNA may offer a potential approach to enhancing antitumor immunotherapy.

小细胞外囊泡及其携带的非编码RNA在非酒精性脂肪性肝病中的作用

小细胞外囊泡(small extracellular vesicles,sEVs)是由细胞分泌的一种细胞外囊泡,产生于多泡体,多泡体与质膜融合并释放到细胞外基质。由于小细胞外囊泡可以携带分子质量相对较小的核酸、蛋白质、脂质,能够执行细胞间物质传递、细胞间通讯等功能。因此,小细胞外囊泡及其携带的非编码RNA不仅参与细胞正常生理过程,也可以在多种疾病的发生发展过程中起重要作用。本文综述了小细胞外囊泡在非酒精性脂肪性肝病(NAFLD)中的作用,小细胞外囊泡及其携带的非编码RNA不仅有望成为NAFLD诊断的标志物,同时也具有治疗NAFLD的潜在作用,或能为治疗NAFLD提供新思路。

非编码小RNA在口腔黏膜下纤维性变中的研究进展

口腔黏膜下纤维性变(oral submucous fibrosis,OSF)是口腔黏膜最常见的癌前病变之一,其发病机制至今尚未完全阐明。非编码小RNA(small non-coding RNAs,SncRNAs)是一类不编码蛋白质的RNA分子,已被广泛报道参与多种人类疾病的调控。越来越多的研究表明多种SncRNAs在OSF发病过程中发挥重要作用。现有研究表明,微RNA(microRNAs,miRNAs)通过调控相关转录因子和基因表达或上皮间充质转化来调控成纤维细胞(fbroblasts,FB)活化而参与OSF疾病进展;长非编码RNA(long noncoding RNAs,lncRNAs)通过调控转化生长因子-β/母体抗瘫抑制因子(transforming growth factor-β/suppressor of mothers against decapentaplegic,TGF-β/Smad)信号通路或与miRNA相互作用参与OSF的发生发展;环状RNA(circular RNAs,circRNAs)通过与miRNA相互作用在OSF中发挥作用;tRNA衍生的小RNA(tRNA-derived small RNAs,tsRNAs)参与多种纤维化疾病的进展,但其在OSF中的具体作用机制仍需进一步探索。未来仍需重点关注SncRNAs介导OSF进展的作用靶点,探究其对OSF的作用功能及分子机制,以期为诊断和治疗OSF提供新思路。

Small nucleolar RNA and its potential role in the oncogenesis and development of colorectal cancer

Small nucleolar RNAs(snoRNAs)represent a class of non-coding RNAs that play pivotal roles in post-transcriptional RNA processing and modification,thereby contributing significantly to the maintenance of cellular functions related to protein synthesis.SnoRNAs have been discovered to possess the ability to influence cell fate and alter disease progression,holding immense potential in controlling human diseases.It is suggested that the dysregulation of snoRNAs in cancer exhibits differential expression across various cancer types,stages,metastasis,treatment response and/or prognosis in patients.On the other hand,colorectal cancer(CRC),a prevalent malignancy of the digestive system,is characterized by high incidence and mortality rates,ranking as the third most common cancer type.Recent research indicates that snoRNA dysregulation is associated with CRC,as snoRNA expression significantly differs between normal and cancerous conditions.Consequently,assessing snoRNA expression level and function holds promise for the prognosis and diagnosis of CRC.Nevertheless,current comprehension of the potential roles of snoRNAs in CRC remains limited.This review offers a comprehensive survey of the aberrant regulation of snoRNAs in CRC,providing valuable insights into the discovery of novel biomarkers,therapeutic targets,and potential tools for the diagnosis and treatment of CRC and furnishing critical cues for advancing research into CRC and the judicious selection of therapeutic targets.

Genetic diversity of the S-type small subunit ribosomal RNA gene of Plasmodium knowlesi isolates from Sabah,Malaysian Borneo and Peninsular Malaysia

Objective:To determine the genetic diversity of Plasmodium(P.)knowlesi isolates from Sabah,Malaysian Borneo and Peninsular Malaysia,targeting the S-type SSU rRNA gene and including aspects of natural selection and haplotype.Methods:Thirty-nine blood samples infected with P.knowlesi were collected in Sabah,Malaysian Borneo and Peninsular Malaysia.The S-type SSU rRNA gene was amplified using polymerase chain reaction,cloned into a vector,and sequenced.The natural selection and haplotype of the S-type SSU rRNA gene sequences were determined using DnaSP v6 and illustrated using NETWORK v10.This study's 39 S-type SSU rRNA sequences and eight sequences from the Genbank database were subjected to phylogenetic analysis using MEGA 11.Results:Overall,the phylogenetic analysis showed no evidence of a geographical cluster of P.knowlesi isolates from different areas in Malaysia based on the S-type SSU rRNA gene sequences.The S-type SSU rRNA gene sequences were relatively conserved and with a purifying effect.Haplotype sharing of the S-type SSU rRNA gene was observed between the P.knowlesi isolates in Sabah,Malaysian Borneo,but not between Sabah,Malaysian Borneo and Peninsular Malaysia.Conclusions:This study suggests that the S-type SSU rRNA gene of P.knowlesi isolates in Sabah,Malaysian Borneo,and Peninsular Malaysia has fewer polymorphic sites,representing the conservation of the gene.These features make the S-type SSU rRNA gene suitable for comparative studies,such as determining the evolutionary relationships and common ancestry among P.knowlesi species.

结直肠癌患者的血清长链非编码RNASNHG5和SNHG11表达及临床意义

目的探究结直肠癌(CRC)患者的血清长链非编码RNA小核仁RNA宿主基因5(lncRNASNHG5,下文简称SNHG5)、SNHG11表达水平及其对CRC的诊断价值。方法选择2015年1月至2018年3月于秦皇岛市第一医院接受CRC根治术治疗的72例CRC患者作为研究对象(设为CRC组),另选择同期于该院就诊的61例结直肠息肉患者设为结直肠息肉组,以及同期于该院体检的59名健康志愿者设为健康对照组。采用实时荧光定量PCR法检测血清SNHG5、SNHG11表达水平,并分析其与CRC患者临床病理特征的关系。采用ROC曲线评估血清SNHG5、SNHG11诊断CRC的效能。采用Kaplan-Meier法分析血清SNHG5、SNHG11表达水平与CRC患者术后无病生存期的关系。结果与健康对照组相比,结直肠息肉组和CRC组的血清SNHG5、SNHG11相对表达量均较高,且CRC组的血清SNHG5、SNHG11相对表达量均高于结直肠息肉组,差异均有统计学意义(P均<0.05)。低分化、TNM分期为Ⅲ期、有浆膜浸润、有淋巴结转移的CRC患者的血清SNHG5、SNHG11相对表达量分别高于中高分化、TNM分期为Ⅱ期、无浆膜浸润、无淋巴结转移的患者,差异均有统计学意义(P均<0.05)。ROC曲线分析结果显示,血清SNHG5和SNHG11联合检测诊断CRC的AUC均大于单项检测,其敏感度和特异度也均高于单项检测。SNHG5低表达组和SNHG11低表达组的无病生存率分别高于SNHG5高表达组和SNHG11高表达组,差异均有统计学意义(P均<0.05)。结论CRC患者的血清SNHG5、SNHG11表达均上调,且均与患者术后无病生存密切相关,两者联合检测诊断CRC的效能较高。

胶质瘤组织lncRNA SNHG25、miR-497-5p表达与临床特征及预后的关系研究

目的探讨胶质瘤组织长链非编码RNA(lncRNA)小核仁RNA宿主基因(SNHG)25、微小RNA(miR)-497-5p表达与临床特征及预后的关系。方法选择2019年1月至2020年1月该院收治的157例胶质瘤患者为胶质瘤组,同期该院100例因颅脑损伤接受手术治疗的患者为对照组。分别取术中切除的胶质瘤组织和正常脑组织检测lncRNA SNHG25、miR-497-5p表达水平,术后随访3年。分析lncRNA SNHG25表达水平与miR-497-5p的相关性,lncRNA SNHG25、miR-497-5p表达水平与患者临床特征和预后的关系。结果与对照组比较,胶质瘤组lncRNA SNHG25表达水平升高(P<0.05),miR-497-5p表达水平降低(P<0.05)。与肿瘤最大径<4 cm、世界卫生组织(WHO)中枢神经系统肿瘤分级Ⅰ~Ⅱ级比较,肿瘤最大径≥4 cm、WHO中枢神经系统肿瘤分级Ⅲ~Ⅳ级的胶质瘤组织中lncRNA SNHG25表达水平升高,miR-497-5p表达水平降低(P<0.05)。胶质瘤患者的lncRNA SNHG25表达水平与miR-497-5p呈负相关(r=-0.370,P<0.05)。lncRNA SNHG25高表达组累积生存率低于lncRNA SNHG25低表达组(P<0.05),miR-497-5p低表达组累积生存率低于miR-497-5p高表达组(P<0.05)。WHO中枢神经系统肿瘤分级Ⅲ~Ⅳ级、lncRNA SNHG25高表达是胶质瘤患者预后不良的危险因素(P<0.05),miR-497-5p高表达则是保护因素(P<0.05)。结论胶质瘤组织中lncRNA SNHG25表达水平升高,miR-497-5p表达水平降低,且与肿瘤最大径增大、WHO中枢神经系统肿瘤分级高有关,可导致胶质瘤患者不良预后。

The role of small non-coding RNAs(sncRNAs)in male infertility:A scoping review

Objective:To give a brief overview of the field of epigenetics and the potential predictive power that small non-coding RNA(sncRNA)may hold in relation to improving the treatment and diagnosis of male infertility.Methods:PRISMA-ScR was used as the scoping review guideline for this investigation.All article data here have been accessed from MEDLINE–PubMed,Science Direct,EBSCO,Scopus,Sage Journals,and Google Scholar.The terms"small non coding RNA,male,infertility,miRNA,sperm"were used in the search between 2015 and 2023.Results:The study comprised 35 publications in total.Several sncRNAs,miR-155,miR-16,miR-196,miR-525-3p,miR-891 were found to be effective in regulating the mechanism of spermatozoa processing in the infertility of men.sncRNA can be used as a biomarker of male infertility.Conclusions:sncRNAs can act as biomarkers for the diagnosis of reproductive diseases.Actually,by recognizing sncRNAs and their mechanisms,a new way to treat infertile men would be paved.The functional annotation of sncRNAs in spermatogenesis is still in its infancy but has enormous potential.This is despite the fact that many potential sncRNAs have been found to date with the use of cutting-edge technology and publicly accessible sncRNA annotation tools.