Construction and validation of somatic mutation-derived long noncoding RNAs signatures of genomic instability to predict prognosis of hepatocellular carcinoma

BACKGROUND Long non-coding RNAs(LncRNAs)have been found to be a potential prognostic factor for cancers,including hepatocellular carcinoma(HCC).Some LncRNAs have been confirmed as potential indicators to quantify genomic instability(GI).Nevertheless,GI-LncRNAs remain largely unexplored.This study established a GI-derived LncRNA signature(GILncSig)that can predict the prognosis of HCC patients.AIM To establish a GILncSig that can predict the prognosis of HCC patients.METHODS Identification of GI-LncRNAs was conducted by combining LncRNA expression and somatic mutation profiles.The GI-LncRNAs were then analyzed for functional enrichment.The GILncSig was established in the training set by Cox regression analysis,and its predictive ability was verified in the testing set and TCGA set.In addition,we explored the effects of the GILncSig and TP53 on prognosis.RESULTS A total of 88 GI-LncRNAs were found,and functional enrichment analysis showed that their functions were mainly involved in small molecule metabolism and GI.The GILncSig was constructed by 5 LncRNAs(miR210HG,AC016735.1,AC116351.1,AC010643.1,LUCAT1).In the training set,the prognosis of high-risk patients was significantly worse than that of low-risk patients,and similar results were verified in the testing set and TCGA set.Multivariate Cox regression analysis and stratified analysis confirmed that the GILncSig could be used as an independent prognostic factor.Receiver operating characteristic curve analysis of the GILncSig showed that the area under the curve(0.773)was higher than the two LncRNA signatures published recently.Furthermore,the GILncSig may have a better predictive performance than TP53 mutation status alone.CONCLUSION We established a GILncSig that can predict the prognosis of HCC patients,which will help to guide prognostic evaluation and treatment decisions.

单核苷酸多态性与高度近视发生发展的研究进展

目前,近视已成为一种全球性公共卫生疾病,其发生多是由遗传和环境等因素引起。单核苷酸多态性(SNPs)是指在基因组水平上发生的、由单个碱基的改变引起的脱氧核糖核酸(DNA)序列多态性。近年来有文献报道,相关基因位点上的SNPs的变化与近视的发生发展密切相关。本文就近视相关基因的SNPs与近视发生发展的关联研究现状作一综述,以期为近视病因和病理机制的研究提供新的思路。

双光子钙成像技术在模型动物视皮层Ⅱ/Ⅲ层神经元功能研究中的应用

钙离子是哺乳动物神经细胞内的重要信使,可以介导多种细胞内信号转导通路,在调控神经元的功能方面发挥关键作用。钙信号在明确的细胞亚区发挥其高度特异性的功能,特别是在大脑视皮层中更能反映神经元的活性,因此对神经元进行钙信号的检测对研究视皮层功能尤其重要。双光子显微镜在皮层浅层区域钙信号检测方面具有独特优势。本文综述了双光子在体检测技术在模型动物视皮层Ⅱ/Ⅲ层神经元功能研究中的应用。

microRNAs调控近视发生发展的研究进展

近视是目前世界上最常见的人类眼部疾病之一。微小RNA (microRNAs,miRNAs)是一类长度约20~25个核苷酸的非蛋白编码的小分子单链RNA,能广泛参与基因转录后水平的调控,与机体的生理病理过程密切相关。近年来,miRNAs在近视发生发展中的调控作用引起了研究人员的广泛关注。本文就miRNAs在近视发生发展过程中的调控作用及可能涉及的通路进行综述,以期为近视发生发展的机制研究和分子生物学诊断提供思路。