简介:目的探讨原发性肝细胞癌RNA,DNA定量测定的临床意义。方法应用流式细胞分析技术。对64例原发性肝细胞癌(PHC)RNA,DNA含量进行定量分析。并对病人进行1-5.5年的随访。结果RNA指标和DNA指标对PHC的临床病理诊断符合率分别为93.7%和75.0%,RNA指标更敏感,双指标联合应用与临床病理诊断符合率为96.8%;DNA倍体与年龄,HCV感染密切相关(P<0.05)。与性别,AFP水平,HBsAg及瘤体大小无关;DI随组织学分级的增高而增加(P<0.05)。RNA和DNA含量与预后密切相关(P<0.01-0.05)。结论RNA,DNA含量可作为PHC诊断及判断预后的理想指标,RNA及DNA双指标同时应用优于任一单项指标。
简介:AbstractGastric cancer (GC) is a common malignancy and is the third leading cause of cancer-related death. At present, there is no simple and effective screening method for early-stage GC, and the treatment results and prognosis are poor. With the continuous improvement of molecular biology techniques, research on circular RNA (circRNA) has gradually expanded over time. Much data supports the role of circRNA in tumorigenesis. Moreover, due to its structural specificity and biological stability, circRNA is anticipated to be a potential biomarker for tumor diagnosis. Studies have confirmed that circRNA can participate in the proliferation, invasion, metastasis, and apoptosis of GC. These findings will lead to novel directions for the diagnosis and treatment of GC. This article reviews the structure and function of circRNA, summarizes the current studies on circRNA, and discusses the potential diagnostic value of circRNA in GC.
简介:摘要目的观察肝细胞癌患者血清中微小RNA(miRNA,miR)-432、微小RNA-432(miR-30b)及微小RNA-432(miR-764)水平。方法选取安徽医科大学第三附属医院2015年1月30日至2018年1月30日收治的150例肝细胞癌患者,同时选取150例年龄匹配的体检结果健康者作为对照组,采用实时荧光定量聚合酶链反应(PCR)法检测研究对象外周血中miR-432、miR-30b及miR-764表达水平。观察miR-432、miR-30b及miR-764与肝细胞癌患者临床病理因素的相关性,并对肝细胞癌患者进行随访,观察miR-432、miR-30b及miR-764与患者总生存期(OS)的相关性。采用独立样本t检验及Log-rank检验。结果肝细胞癌患者外周血中miR-432(2.11±0.71)、miR-30b(1.88±0.68)及miR-764(1.90±0.65)水平均较对照组高(1.12±0.40、1.01±0.38、0.99±0.35,t=4.879、13.679、15.097,P<0.01)。miR-432、miR-764表达量与肝细胞癌TNM分期有相关(P<0.05),miR-30b与肝细胞癌TNM分期及分化程度有相关(P<0.05)。Kaplan-Meier法及Log-rank检验显示,miR-432、miR-30b及miR-764表达量升高组OS短于降低组(Log-rank χ2=16.433、10.575、7.998,P<0.05)。Cox多因素分析均显示,TNM分期、miR-432、miR-30b、miR-764、肿瘤分化程度是肝细胞癌OS的独立影响因素[比值比(OR)=2.904、2.135、1.651、1.496、1.205,P<0.05]。结论肝细胞癌患者循环中miR-432、miR-30b及miR-764表达上调,且与患者总生存率降低密切相关。
简介:AbstractThe present pandemic has posed a crisis to the economy of the world and the health sector. Therefore, the race to expand research to understand some good molecular targets for vaccine and therapeutic development for SARS-CoV-2 is inevitable. The newly discovered coronavirus 2019 (COVID-19) is a positive sense, single-stranded RNA, and enveloped virus, assigned to the beta CoV genus. The virus (SARS-CoV-2) is more infectious than the previously detected coronaviruses (MERS and SARS). Findings from many studies have revealed that S protein and RdRp are good targets for drug repositioning, novel therapeutic development (antibodies and small molecule drugs), and vaccine discovery. Therapeutics such as chloroquine, convalescent plasma, monoclonal antibodies, spike binding peptides, and small molecules could alter the ability of S protein to bind to the ACE-2 receptor, and drugs such as remdesivir (targeting SARS-CoV-2 RdRp), favipir, and emetine could prevent SASR-CoV-2 RNA synthesis. The novel vaccines such as mRNA1273 (Moderna), 3LNP-mRNAs (Pfizer/BioNTech), and ChAdOx1-S (University of Oxford/Astra Zeneca) targeting S protein have proven to be effective in combating the present pandemic. Further exploration of the potential of S protein and RdRp is crucial in fighting the present pandemic.
简介:摘要环状RNA(circular RNA, circRNA)是一类最新发现的非编码RNA,因具有特殊结构及可以在疾病中发挥调控作用而成为最近的研究热点。许多研究表明circRNA与心力衰竭的病理生理机制密切相关,特别是在心力衰竭中的关键环节——心脏重塑,circRNA表现出调控甚至是逆转心脏重塑的巨大潜力。文章对circRNA的功能及其在心力衰竭进展中的作用进行综述,并从心脏重塑3个重要环节(心肌细胞改变、心肌间质纤维化、血管再生)总结circRNA发挥的调控作用,总结目前circRNA在心力衰竭方面作为生物标志物的研究进展,为开发新的治疗靶标和生物标志物提供新思路。
简介:AbstractAlthough whole-exome sequencing and whole-genome sequencing has tremendously improved our understanding of the genetic etiology of human disorders, about half of the patients still do not receive a molecular diagnosis. The high fraction of variants with uncertain significance and the challenges of interpretation of noncoding variants have urged scientists to implement RNA sequencing (RNA-seq) in the diagnostic approach as a high throughput assay to complement genomic data with functional evidence. RNA-seq data can be used to identify aberrantly spliced genes, detect allele-specific expression, and identify gene expression outliers. Amongst eight studies utilizing RNA-seq, a mean diagnostic uplift of 15% has been reported. Here, we provide an overview of how RNA-seq has been implemented to aid in identifying the causal variants of Mendelian disorders.
简介:摘要环状RNA(circular RNA,circRNA)是一类具有闭合环状结构的非编码RNA分子,大量存在于真核转录组中。环状RNA在不同的物种中具有保守性,同时存在组织及不同发育阶段的表达特异性。由于环状RNA对核酸酶不敏感,故比线性RNA更稳定。环状RNA具有竞争性内源RNA机制(competing endogenous RNAs,ceRNA),调控可变剪切和转录过程,以及与功能蛋白结合等功能。基于环状RNA的特征和生物功能,其在疾病中发挥着重要的调控作用。随着研究发展,环状RNA在组织和疾病的表达机制和功能机制也取得了进步。本综述旨在总结环状RNA的起源、特征、生物功能以及在疾病中的最新作用。